SimCom SIM5300E Supplement

SIM5300E Hardware Design

SIM5300E_Hardware_Design_V1.02
I
Document Title
SIM5300E Hardware Design
Version
1.02
Date
2016-08-18
Status
Released
Document Control ID
SIM5300E_Hardware Design_V1.02
General Notes
SIMCom offers this information as a service to its customers, to support application and engineering efforts
that use the products designed by SIMCom. The information provided is based upon requirements
specifically provided to SIMCom by the customers. SIMCom has not undertaken any independent search for
additional relevant information, including any information that may be in the customer’s possession.
Furthermore, system validation of this product designed by SIMCom within a larger electronic system
remains the responsibility of the customer or the customer’s system integrator. All specifications supplied
herein are subject to change.
Copyright
This document contains proprietary technical information which is the property of SIMCom Limited. Copying
this document and giving it to others, using the documents contents, and communicating the contents
thereof are forbidden without express authority. Offenders are liable to the payment of damages. All rights
reserved in the event of grant of a patent or the registration of a utility model or design. All specification
supplied herein are subject to change without notice at any time.
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2016

SIM5300E_Hardware_Design_V1.02
II
Revision History
Date
Version
Description of change
Author
2016-06-02
1.00
Draft
Xiuyu.zhang/Fan.Gao
2016-08-01
1.01
Update Table7, 9, 10, 15, 16, 21, 25, 26, 28, Figure 1, 4,
5, 14, 32, 40, Add Table 31 and 7 section PACKAGING
Ming.zhu
2016-08-18
1.02
Change the style of document
Ming.zhu

SIM5300E_Hardware_Design_V1.02
III
CONTENTS
TABLE INDEX..............................................................................................................................................................V
FIGURE INDEX...........................................................................................................................................................VI
1INTRODUCTION .................................................................................................................................................1
2SIM5300E OVERVIEW ........................................................................................................................................ 1
2.1 SIM5300E KEY FEATURES ........................................................................................................................................ 2
2.2 OPERATING MODES.................................................................................................................................................. 4
2.3 SIM5300E FUNCTIONAL DIAGRAM ............................................................................................................................ 5
3PACKAGE INFORMATION................................................................................................................................... 6
3.1 PINOUT DIAGRAM .................................................................................................................................................... 6
3.2 PIN DESCRIPTION ..................................................................................................................................................... 8
3.3 PACKAGE DIMENSIONS............................................................................................................................................ 12
4APPLICATION INTERFACE................................................................................................................................. 14
4.1 POWER SUPPLY...................................................................................................................................................... 14
4.2 POWER ON/DOWN SCENARIOS ................................................................................................................................. 16
4.2.1 Power on SIM5300E ...................................................................................................................................... 16
4.2.2 Power down SIM5300E ................................................................................................................................. 18
4.2.3 Restart SIM5300Eby PWRKEY Pin ................................................................................................................. 20
4.3 EXTERNAL RESET .................................................................................................................................................... 21
4.4 POWER SAVING MODE............................................................................................................................................ 22
4.4.1 Minimum Functionality Mode....................................................................................................................... 22
4.4.2 Sleep Mode 1 (AT+CSCLK=1) ......................................................................................................................... 23
4.4.3 Wake Up SIM5300E from Sleep Mode 1 (AT+CSCLK=1)................................................................................ 23
4.4.4 Sleep Mode 2 (AT+CSCLK=2) ......................................................................................................................... 23
4.4.5 Wake Up SIM5300E from Sleep Mode 2 (AT+CSCLK=2)................................................................................ 23
4.5 RTC BACKUP......................................................................................................................................................... 24
4.6 SERIAL INTERFACES ................................................................................................................................................. 25
4.6.1 Function of Serial Port and Debug Port......................................................................................................... 26
4.6.2 Software Debug ............................................................................................................................................ 26
4.7 AUDIO INTERFACES................................................................................................................................................. 27
4.7.1 Speaker Interface Configuration ................................................................................................................... 27
4.7.2 Microphone Interfaces Configuration........................................................................................................... 28
4.7.3 Earphone Interface Configuration................................................................................................................. 28
4.7.4 Audio Electronic Characteristics.................................................................................................................... 29
4.8 USIM CARD INTERFACE .......................................................................................................................................... 29
4.8.1 USIM Card Application .................................................................................................................................. 29
4.8.2 Design Considerations for USIM Card Holder................................................................................................ 31

SIM5300E_Hardware_Design_V1.02
IV
4.9 USB INTERFACE ..................................................................................................................................................... 34
4.9.1 Application Guide.......................................................................................................................................... 34
4.10 SPI INTERFACE....................................................................................................................................................... 35
4.11 ADC.................................................................................................................................................................... 35
4.12 RI BEHAVIORS ....................................................................................................................................................... 35
4.13 NETWORK STATUS INDICATION ................................................................................................................................. 37
4.14 PWM.................................................................................................................................................................. 38
4.15 I2C BUS ............................................................................................................................................................... 38
4.16 ANTENNA INTERFACE .............................................................................................................................................. 38
5ELECTRICAL, RELIABILITY AND RADIO CHARACTERISTICS .................................................................................. 39
5.1 ABSOLUTE MAXIMUM RATINGS ................................................................................................................................ 39
5.2 RECOMMENDED OPERATING CONDITIONS .................................................................................................................. 40
5.3 DIGITAL INTERFACE CHARACTERISTICS ........................................................................................................................ 40
5.4 VDD_EXT CHARACTERISTICS ................................................................................................................................... 41
5.5 VRTC CHARACTERISTICS.......................................................................................................................................... 41
5.6 CURRENT CONSUMPTION (VBAT =3.8V) .................................................................................................................. 41
5.7 ELECTRO-STATIC DISCHARGE .................................................................................................................................... 43
5.8 RF SPECIFICATION .................................................................................................................................................. 44
5.8.1 Conducted Transmission Power .................................................................................................................... 44
5.8.2 Module RF Receive Sensitivity....................................................................................................................... 44
5.8.3 Module Operating Frequency Bands............................................................................................................. 45
5.8.4 Module Operating Frequency Bands............................................................................................................. 45
6MANUFACTURING ........................................................................................................................................... 46
6.1 TYPICAL SOLDER REFLOW PROFILE............................................................................................................................. 46
6.2 THE MOISTURE SENSITIVITY LEVEL............................................................................................................................. 48
6.3 BAKING REQUIREMENTS .......................................................................................................................................... 49
7PACKAGING..................................................................................................................................................... 49
8APPENDIX........................................................................................................................................................ 52
A. RELATED DOCUMENTS ..................................................................................................................................................... 52
B. TERMS AND ABBREVIATIONS.............................................................................................................................................. 52
C. SAFETY CAUTION ............................................................................................................................................................. 54

SIM5300E_Hardware_Design_V1.02
V
TABLE INDEX
TABLE 1: THE DIFFERENCE OF SIM5300E AND SIM5300EA................................................................................................... 1
TABLE 2: SIM5300E KEY FEATURES........................................................................................................................................ 2
TABLE 3: OPERATING MODE DEFINITION.............................................................................................................................. 4
TABLE 4: IO PARAMETERS DEFINITION.................................................................................................................................. 8
TABLE 5: PIN DESCRIPTION ................................................................................................................................................... 9
TABLE 6: RECOMMENDED ZENER DIODE MODELS ............................................................................................................. 15
TABLE 7: POWER ON TIMING AND ELECTRONIC CHARACTERISTIC..................................................................................... 17
TABLE 8: THE CURRENT CONSUMPTION OF MINIMUM FUNCTIONALITY MODE ............................................................... 22
TABLE 9: MICROPHONE INPUT CHARACTERISTICS.............................................................................................................. 29
TABLE 10: AUDIO OUTPUT CHARACTERISTICS .................................................................................................................... 29
TABLE 11: USIM ELECTRONIC CHARACTERISTIC IN 1.8V MODE (USIM_VDD=1.8V) ........................................................... 30
TABLE 12: USM ELECTRONIC CHARACTERISTIC 3.0V MODE (USIM_VDD=2.9V)................................................................. 30
TABLE 13: PIN DESCRIPTION (AMPHENOL USIM CARD HOLDER) ....................................................................................... 32
TABLE 14: PIN DESCRIPTION (MOLEX USIM CARD HOLDER)............................................................................................... 33
TABLE 15: ELECTRONIC CHARACTERISTIC ........................................................................................................................... 34
TABLE 16: ADC SPECIFICATION............................................................................................................................................ 35
TABLE 17: RI BEHAVIORS ..................................................................................................................................................... 35
TABLE 18: STATUS OF THE NETLIGHT PIN............................................................................................................................ 37
TABLE 19: TVS PART NUMBER LIST...................................................................................................................................... 39
TABLE 20: ABSOLUTE MAXIMUM RATINGS......................................................................................................................... 40
TABLE 21: RECOMMENDED OPERATING CONDITIONS ....................................................................................................... 40
TABLE 22: DIGITAL INTERFACE CHARACTERISTICS............................................................................................................... 40
TABLE 23: VDD_EXT CHARACTERISTICS .............................................................................................................................. 41
TABLE 24: VRTC CHARACTERISTICS ..................................................................................................................................... 41
TABLE 25: CURRENT CONSUMPTION*................................................................................................................................ 41
TABLE 26: THE ESD CHARACTERISTICS (TEMPERATURE: 25℃, HUMIDITY: 45 %)............................................................... 43
TABLE 27: SIM5300E CONDUCTED RF OUTPUT POWER ..................................................................................................... 44
TABLE 28: SIM5300E CONDUCTED RF RECEIVE SENSITIVITY............................................................................................... 45
TABLE 29: SIM5300E OPERATING FREQUENCIES ................................................................................................................ 45
TABLE 30: SIM5300E GPRS DATA THROUGHOUT ................................................................................................................ 45
TABLE 31: SIM5300E EDGE DATA THROUGHOUT................................................................................................................ 46
TABLE 32: SIM5300E DATA THROUGHOUT ......................................................................................................................... 46
TABLE 33: MOISTURE CLASSIFICATION LEVEL AND FLOOR LIFE.......................................................................................... 48
TABLE 34: BAKING REQUIREMENTS.................................................................................................................................... 49
TABLE 35: TRAY SIZE............................................................................................................................................................ 50
TABLE 36: SMALL CARTON SIZE........................................................................................................................................... 51
TABLE 37: BIG CARTON SIZE................................................................................................................................................ 52
TABLE 38: RELATED DOCUMENTS ....................................................................................................................................... 52
TABLE 39: TERMS AND ABBREVIATIONS ............................................................................................................................. 52
TABLE 40: SAFETY REQUIREMENTS..................................................................................................................................... 54

SIM5300E_Hardware_Design_V1.02
VI
FIGURE INDEX
FIGURE 1: SIM5300E FUNCTIONAL DIAGRAM...................................................................................................................... 6
FIGURE 2: SIM5300E PIN OUT DIAGRAM (TOP VIEW) .......................................................................................................... 7
FIGURE 3：SIM5300EA PIN OUT DIAGRAM (TOP VIEW)...................................................................................................... 8
FIGURE 4: DIMENSIONS OF SIM5300E (UNIT: MM)............................................................................................................ 13
FIGURE 5: RECOMMENDED PCB FOOTPRINT OUTLINE (UNIT: MM)................................................................................... 14
FIGURE 6: REFERENCE CIRCUIT OF THE DC-DC POWER SUPPLY ......................................................................................... 15
FIGURE 7: VBAT INPUT APPLICATION CIRCUIT.................................................................................................................... 15
FIGURE 8: REFERENCE CIRCUIT OF THE LDO POWER SUPPLY............................................................................................. 16
FIGURE 9: REFERENCE CIRCUIT OF THE DC-DC POWER SUPPLY ......................................................................................... 16
FIGURE 10: POWERED ON/DOWN MODULE USING TRANSISTOR...................................................................................... 17
FIGURE 11: POWERED ON/DOWN MODULE USING BUTTON ............................................................................................ 17
FIGURE 12: TIMING OF POWER ON MODULE..................................................................................................................... 17
FIGURE 13: TIMING OF POWER DOWN SIM5300E BY PWRKEY.......................................................................................... 19
FIGURE 14: TIMING OF RESTART SIM5300E........................................................................................................................ 21
FIGURE 15: RESET TIMING .................................................................................................................................................. 21
FIGURE 16: RESET REFERENCE DESIGN CIRCUIT ................................................................................................................. 22
FIGURE 17: RTC SUPPLY FROM CAPACITOR......................................................................................................................... 24
FIGURE 18: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ............................................................................................. 24
FIGURE 19: RTC SUPPLY FROM RECHARGEABLE BATTERY .................................................................................................. 24
FIGURE 20: CONNECTION OF THE SERIAL INTERFACES....................................................................................................... 25
FIGURE 21: CONNECTION OF RXD AND TXD ONLY ............................................................................................................. 25
FIGURE 22: REFERENCE CIRCUIT OF LEVEL SHIFT ............................................................................................................... 26
FIGURE 23: CONNECTION FOR SOFTWARE UPGRADING AND DEBUGGING....................................................................... 27
FIGURE 24: SPEAKER REFERENCE CIRCUIT.......................................................................................................................... 27
FIGURE 25: SPEAKER WITH AMPLIFIER REFERENCE CIRCUIT.............................................................................................. 28
FIGURE 26: MICROPHONE REFERENCE CIRCUIT ................................................................................................................. 28
FIGURE 27: EARPHONE REFERENCE CIRCUIT ...................................................................................................................... 29
FIGURE 28: REFERENCE CIRCUIT OF THE 8-PIN USIM CARD HOLDER................................................................................. 31
FIGURE 29: REFERENCE CIRCUIT OF THE 6-PIN USIM CARD HOLDER................................................................................. 31
FIGURE 30: AMPHENOL C707 10M006 5122 USIM CARD HOLDER .................................................................................... 32
FIGURE 31: MOLEX 91228 USIM CARD HOLDER................................................................................................................. 33
FIGURE 32: USB INTERFACE ................................................................................................................................................ 34
FIGURE 33: RI BEHAVIOR OF VOICE CALLING AS A RECEIVER ............................................................................................. 36
FIGURE 34: RI BEHAVIOR OF DATA CALLING AS A RECEIVER............................................................................................... 36
FIGURE 35: RI BEHAVIOR OF URC OR RECEIVE SMS............................................................................................................ 37
FIGURE 36: RI BEHAVIOR AS A CALLER................................................................................................................................ 37
FIGURE 37: REFERENCE CIRCUIT OF NETLIGHT................................................................................................................... 38
FIGURE 38: ANTENNA MATCHING CIRCUIT......................................................................................................................... 39
FIGURE 39: TOP AND BOTTOM VIEW OF SIM5300E ........................................................................................................... 47
FIGURE 40: THE RAMP-SOAK-SPIKE REFLOW PROFILE OF 5300E ....................................................................................... 48

SIM5300E_Hardware_Design_V1.02
VII
FIGURE 41: PACKAGING INTRODUCE.................................................................................................................................. 50
FIGURE 42: TRAY DRAWING ................................................................................................................................................ 50
FIGURE 43: SMALL CARTON DRAWING............................................................................................................................... 51
FIGURE 44: BIG CARTON DRAWING.................................................................................................................................... 51

SIM5300E_Hardware_Design_V1.02
1
1INTRODUCTION
This document describes SIM5300E hardware interface in great detail. Also, it is suitable for SIM5300EA.
Both SIM5300E and SIM5300EA have the same function except audio, which is particular for SIM5300EA.
This document can help users to understand SIM5300E interface specifications, electrical and mechanical
details. With the help of this document and other SIM5300E application notes, users can use SIM5300E to
design various applications quickly.
Table 1: The difference of SIM5300E and SIM5300EA
Module
SIM5300E
SIM5300EA
Audio
Not supported
Supported
2SIM5300E OVERVIEW
Designed for global market, SIM5300E is a dual-Band GSM/GPRS/EDGE and dual-band UMTS/HSPA module
that works on frequency bands EGSM 900MHz, DCS 1800MHz and WCDMA2100/900MHz. SIM5300E
features GPRS multi-slot class 12 and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.
With a tiny configuration of 24*24*2.4mm, SIM5300E can meet almost all space requirements in user
applications, such as M2M, PDA and other mobile devices.
SIM5300E has 68 pins, which provides all hardware interfaces between module and customers’ boards,
which includes:
Power Supply
UART Interface which can support full modem.
Audio channel which includes a microphone input and a receiver output (only for SIM5300EA).
GPIOs
SPI Interface
I2C Interface

SIM5300E_Hardware_Design_V1.02
2
USB Interface
ADC
USIM Interface
RTC
PWM
Debug Port
SIM5300E is designed with power saving technique where the current consumption is as low as 0.88mA in
sleep mode (BS-PA-MFRMS=9).
SIM5300E integrates TCP/IP protocol and extended TCP/IP AT commands which are very useful for data
transfer applications. For details about TCP/IP applications, please refer to document [2].
2.1 SIM5300E KEY FEATURES
Table 2: SIM5300E key features
Feature
Implementation
Power supply
3.4V ~ 4.4V
Power saving
Typical power consumption in sleep mode is 0.88mA ( BS-PA-MFRMS=9 )
Frequency bands
Support bands: EGSM 900, DCS 1800 and WCDMA B1, WCDMA B8.
SIM5300E can search the 4 frequency bands automatically. The
frequency bands can also be set by AT command “AT+CBAND”. For
details, please refer to document [1].
Compliant to GSM Phase 2/2+
Transmitting power
GSM/GPRS:
Class 4 (2W): EGSM900
Class 1 (1W): DCS1800
UMTS:
Class 3 (0.25W): WCDMA
CSD
Support CSD transmission

SIM5300E_Hardware_Design_V1.02
3
Temperature range
Operating temperature: -40°C ~ +85°C
Storage temperature -45°C ~ +90°C
Data Transmission
Throughput
GPRS multi-slot class 12
GPRS data transfer: Max. 85.6 kbps (DL/UL)
EDGE data transfer: Only support EDGE downlink
Max. 236.8 kbps(DL)
UMTS R99 speed: 384 kbps (DL/UL)
HSDPA category8 (7.2 Mbps) - single receive
HSUPA category6 (5.76 Mbps)
Integrate the TCP/IP protocol
Support Packet Broadcast Control Channel (PBCCH)
SMS
MT, MO, CB, Text and PDU mode
SMS storage: USIM card
USIM interface
Support USIM card: 1.8V, 3V
USB
USB 2.0 specification, 90 Ohms differential
External antenna
Antenna pad,50 Ohms
Audio features for
SIM5300EA
Speech codec modes:
Half Rate (ETS 06.20)
Full Rate (ETS 06.10)
Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80)
Adaptive multi rate (AMR)
Echo Cancellation
Noise Suppression
Serial port and
debug port
Serial port:
Full modem interface with status and control lines, unbalanced,
asynchronous.
Baud rate: 300bps to 460800bps(default:115200bps)
Autobauding supports baud rate from 1200 bps to 115200bps.
Can be used for AT commands or data stream.
Support RTS/CTS hardware handshake and software ON/OFF flow
control.
Multiplex ability according to GSM 07.10 Multiplexer Protocol.
Debug port:
Null modem interface DBG_TXD and DBG_RXD.
Can be used for debugging.

SIM5300E_Hardware_Design_V1.02
4
Phonebook
management
Support phonebook types: SM, FD, LD, RC, ON, MC
USIM application toolkit
GSM 11.14 Release 99
Real time clock
Support RTC
Physical characteristics
Size: 24*24*2.4mm
Weight:3 g
Firmware upgrade
Firmware upgradeable by USB interface (recommended) and serial Port
2.2 OPERATING MODES
The table below summarizes the various operating modes of SIM5300E.
Table 3: Operating mode Definition
Mode
Function
Sleep mode
GSM/WCDM
A SLEEP
Module will automatically enter SLEEP mode if DTR is set to high
level and there is no air or hardware interruption (such as GPIO
interrupt or data on serial port).
In this case, the current consumption of module will be reduced
to the minimal level.
In SLEEP mode, the module can still receive paging message,
voice call and SMS.
GSM
GSM IDLE
Software is active. Module has registered to the GSM network,
and the module is ready to communicate.
GSM TALK
Connection between two subscribers is in progress. In this case,
the power consumption depends on network settings (DTX
off/on, FR/EFR/HR, hopping sequences, etc.) and antenna.
GPRS
GPRS
STANDBY
Module is ready for GPRS data transfer, but no data is currently
sent or received. In this case, power consumption depends on
network settings and GPRS configuration.

SIM5300E_Hardware_Design_V1.02
5
GPRS DATA
There is GPRS data transfer (PPP or TCP or UDP) in progress. In
this case, power consumption is related with network settings
(e.g. power control level); uplink/downlink data rates and GPRS
configuration (e.g. used multi-slot settings).
EDGE
EDGE
STANDBY
Module is ready for data transfer in EDGE mode, but no data is
currently sent or received. In this case, power consumption
depends on network settings and EDGE configuration
EDGE DATA
There is EDGE data transfer (PPP or TCP or UDP) in progress. In
this case, power consumption is related with network settings
(e.g. power control level), uplink/downlink data rates and EDGE
configuration.
WCDMA
WCDMA IDLE
Module has registered to the WCDMA network, and the module
is ready to communicate.
WCDMA
TALK
Module is active in WCDMA mode. The power consumption
depends on network settings.
Power down
Module can be powered down by the AT command “AT+CPOWD=1” or by using
PWRKEY pin. The power management unit shuts down the power supply of
module, only the power supply of RTC is remained. The serial interface is not
accessible.
Minimum
functionality
mode
The AT command “AT+CFUN” can be used to set the module to a minimum
functionality mode without removing the power supply. In this mode, the RF part
of the module will not work or the SIM card will not be accessible, or both will be
closed. The serial port is still accessible. The power consumption in this mode is
very low.
2.3 SIM5300E FUNCTIONAL DIAGRAM
The following figure shows a functional diagram of SIM5300E:
The GSM PA
Processor/PMU
The oscillator
The antenna interface
The other interfaces

SIM5300E_Hardware_Design_V1.02
6
GSM PA/ WCDMA
RF Frontend
Transceiver/Integrated
3G PA Power Management
XO
32.768kHz
I2C
USB
RTC
USIM
PWRKEY
Reset
UART
GPIOs
ADC
DCDC
Vbat
SPI
RF_ANT
SMT Interface
Flash
PWM
Audio Codec
(only for
SIM5300EA)
Vbat
3G Isoplexer
Processor
Vbat
XO
26MHz
Module
Figure 1: SIM5300E functional diagram
3PACKAGE INFORMATION
3.1 PINOUT DIAGRAM
All functions of the SIM5300E will be provided through 68 pins that will be connected to the customers’
platform. The following Figures are high-level views of the pin assignment of SIM5300E and SIM5300EA.

SIM5300E_Hardware_Design_V1.02
7
Figure 2: SIM5300E pin out diagram (Top view)

SIM5300E_Hardware_Design_V1.02
8
Figure 3：SIM5300EA pin out diagram (Top view)
3.2 PIN DESCRIPTION
Table 4: IO Parameters Definition
Pin Type
Description
PI
Power input
PO
Power output

SIM5300E_Hardware_Design_V1.02
9
IO
Bidirectional input / output
DI
Digital input
DO
Digital output
AI
Analog input
AO
Analog output
Table 5: Pin description
Pin name
Pin number
IO
Description
Comment
Power supply
VBAT
55,56,57
PI
Power supply
VRTC
26
PI/
PO
Power supply for RTC
It is recommended
to connect with a
battery or a
capacitor (e.g.
4.7uF).
VDD_EXT
15
PO
1.8V output power supply
At all times,
VDD_EXT must not
be influenced by
any external voltage
above 2V. If it is
unused, keep
floating.
GND
2,17,18,29,39
,45,46,54,58,
59,61,62,63,6
4,65
Ground
Power on/down
PWRKEY
1
DI
PWRKEY should be pulled low at least
100ms to power on or 1s to power
down the module.
Pulled up internally.

SIM5300E_Hardware_Design_V1.02
10
Audio interfaces only for SIM5300EA (these pins of SIM5300E should be NC)
MIC_P
19
AI
Differential audio input
If these pins are
unused, keep
floating.
MIC_N
20
SPK_P
21
AO
Differential audio output
SPK_N
22
Status
STATUS
66
DO
Power on status indication
If these pins are
unused, keep
floating.
NETLIGHT
52
DO
Network status indication
SPI interface
SPI _CLK
11
DO
SPI interface
If these pins are
unused, keep
floating.
SPI_MOSI
12
DO
SPI_MISO
13
DI
SPI_CS
14
DO
I2C interface
SDA
37
IO
I2C serial bus data
If these pins are
unused, keep
floating.
SCL
38
DO
I2C serial bus clock
GPIOs
GPIO1
40
IO
GPIO1
If these pins are
unused, keep
floating.
GPIO2
41
GPIO2
GPIO3
42
GPIO3
GPIO4
43
GPIO4
GPIO6
47
GPIO6
GPIO7
48
GPIO7

SIM5300E_Hardware_Design_V1.02
11
GPIO11
67
GPIO11
GPIO12
68
GPIO12
Serial port
RXD
10
DI
Receive data
TXD must be
prevented from
accessing excessive
voltage above 2V.
If these pins are
unused, keep
floating.
TXD
9
DO
Transmit data
RTS
8
DI
Request to send
CTS
7
DO
Clear to send
DCD
5
DO
Data carrier detect
RI
4
DO
Ring indicator
DTR
3
DI
Data terminal ready
Debug port
GPIO8/DBG_RX
D
49
DI
Default DBG_RXD
If these pins are
unused, keep
floating.
GPIO9/DBG_TX
D
50
DO
Default DBG_TXD
USB interface
VBUS
24
PI
VBUS (5V)
If these pins are
unused, keep
floating.
USB_DP
27
IO
USB 2.0 specification, 90 Ohms
differential
USB_DN
28
IO
USIM interface
USIM_VDD
30
PO
Voltage supply for USIM card. Support
1.8V or 3V USIM card
All signals of USIM
interface should be
protected against
ESD with a TVS
diode array.
USIM_DATA
31
IO
USIM data input/output
USIM_CLK
32
DO
USIM clock

SIM5300E_Hardware_Design_V1.02
12
USIM_RST
33
DO
USIM reset
USIM_DET
34
DI
USIM card detection
If it is unused, keep
floating.
ADC
ADC
25
AI
Input voltage range: 0V ~ 1.1V
If it is unused, keep
floating.
External reset
RESET
16
DI
Reset input(Active low)
Recommend to
connect a 100pF
capacitor.
Pulse width modulation( PWM )
PWM1
35
DO
PWM
If these pins are
unused, keep
floating.
PWM2
36
DO
PWM
RF interface
RF_ANT
60
IO
Radio antenna connection
Impendence must
be controlled to
50Ω.
Not connect
NC
6,23,44,51,53
-
These pins should
be kept floating.
Note: Pins like VDD_EXT and TXD must be prevented from excessive voltage above 2V. NC-pins
should be left disconnected
3.3 PACKAGE DIMENSIONS