Telit Wireless Solutions NL865H2 Series Guide

[01.2017]
Mod.0818 2017-01 Rev.0
NL865H2
Hardware Design Guide
1VV0301616 Rev. 7 –2020-04-20

NL865H2 Hardware Design Guide
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SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
NOTICE
While reasonable efforts have been made to assure the accuracy of this document, Telit
assumes no liability resulting from any inaccuracies or omissions in this document, or from
use of the information obtained herein. The information in this document has been carefully
checked and is believed to be reliable. However, no responsibility is assumed for
inaccuracies or omissions. Telit reserves the right to make changes to any products
described herein and reserves the right to revise this document and to make changes from
time to time in content hereof with no obligationto notify any person of revisions or changes.
Telit does not assume any liability arising out of the application or use of any product,
software, or circuit described herein; neither does it convey license under its patent rights
or the rights of others.
It is possible that this publication may contain references to, or information about Telit
products (machines and programs), programming, or services that are not announced in
your country. Such references or information must not be construed to mean that Telit
intends to announce such Telit products, programming, or services in your country.
COPYRIGHTS
This instruction manual and the Telit products described in this instruction manual may be,
include or describe copyrighted Telit material, such as computer programs stored in
semiconductor memories or other media. Laws in the Italy and other countries preserve for
Telit and its licensors certain exclusive rights for copyrighted material, including the
exclusive right to copy, reproduce in any form, distribute and make derivative works of the
copyrighted material. Accordingly, any copyrighted material of Telit and its licensors
contained herein or in the Telit products described in this instruction manual may not be
copied, reproduced, distributed, merged or modified in any manner without the express
written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed
to grant either directly or by implication, estoppel, or otherwise, any license under the
copyrights, patents or patent applications of Telit, as arises by operation of law in the sale
of a product.
COMPUTER SOFTWARE COPYRIGHTS
The Telit and 3rd Party supplied Software(SW) products described in this instructionmanual
may include copyrighted Telit and other 3rd Party supplied computer programs stored in
semiconductor memories or other media. Laws in the Italy and other countries preserve for
Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted computer
programs, including the exclusive right to copy or reproduce in any form the copyrighted
computer program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW
computer programs contained in the Telit products described in this instruction manual may
not be copied (reverse engineered) or reproduced inany manner without theexpress written
permission of Telit or the 3rd Party SW supplier. Furthermore, the purchase of Telit products
shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any
license under the copyrights, patents or patent applications of Telit or other 3rd Party
supplied SW, except for the normal non-exclusive, royalty free license to use that arises by
operation of law in the sale of a product.

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USAGE AND DISCLOSURE RESTRICTIONS
I. License Agreements
The software described in this document is the property of Telit and its licensors. It is
furnished by express license agreement only and may be used only in accordance with the
terms of such an agreement.
II. Copyrighted Materials
Software and documentation are copyrighted materials. Making unauthorized copies is
prohibited by law. No part of the software or documentation may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, without prior written permission of Telit
III. High Risk Materials
Components, units, or third-party products used in the product described herein are NOT
fault-tolerant and are NOT designed, manufactured, or intended for use as on-line control
equipment in the following hazardous environments requiring fail-safe controls: the
operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air
Traffic Control, Life Support, or Weapons Systems (High Risk Activities”). Telit and its
supplier(s) specifically disclaim any expressed or implied warranty of fitness for such High
Risk Activities.
IV. Trademarks
TELIT and the Stylized T Logo are registered in Trademark Office. All other product or
service names are the property of their respective owners.
V. Third Party Rights
The software may include Third Party Right software. In this case you agree to comply with
all terms and conditions imposed on you in respect of such separate software. In addition
to Third Party Terms, the disclaimer of warranty and limitation of liability provisions in this
License shall apply to the Third Party Right software.
TELIT HEREBY DISCLAIMS ANY AND ALL WARRANTIES EXPRESS OR IMPLIED
FROM ANY THIRD PARTIES REGARDING ANY SEPARATE FILES, ANY THIRD PARTY
MATERIALS INCLUDED IN THE SOFTWARE, ANY THIRD PARTY MATERIALS FROM
WHICH THE SOFTWARE IS DERIVED (COLLECTIVELY “OTHER CODE”), AND THE
USE OF ANY OR ALL THE OTHER CODE IN CONNECTION WITH THE SOFTWARE,
INCLUDING (WITHOUT LIMITATION) ANY WARRANTIES OF SATISFACTORY
QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.
NO THIRD PARTY LICENSORS OF OTHER CODE SHALL HAVE ANY LIABILITY FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED
AND WHETHER MADE UNDER CONTRACT, TORT OR OTHER LEGAL THEORY,
ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE OTHER CODE
OR THE EXERCISE OF ANY RIGHTS GRANTED UNDER EITHER OR BOTH THIS
LICENSE AND THE LEGAL TERMS APPLICABLE TO ANY SEPARATE FILES, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

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APPLICABILITY TABLE
PRODUCTS
NL865H2-W1

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Contents
NOTICE 2
COPYRIGHTS................................................................................................ 2
COMPUTER SOFTWARE COPYRIGHTS...................................................... 2
USAGE AND DISCLOSURE RESTRICTIONS............................................... 3
I. License Agreements..................................................................... 3
II. Copyrighted Materials................................................................... 3
III. High Risk Materials....................................................................... 3
IV. Trademarks .................................................................................. 3
V. Third Party Rights......................................................................... 3
APPLICABILITY TABLE................................................................................ 4
CONTENTS.................................................................................................... 5
1. INTRODUCTION.......................................................................... 8
Scope........................................................................................... 8
Audience....................................................................................... 8
Contact Information, Support........................................................ 8
Text Conventions.......................................................................... 9
Related Documents.................................................................... 10
2. GENERAL PRODUCT DESCRIPTION ...................................... 11
Overview..................................................................................... 11
Product Variants and Frequency Bands...................................... 11
Target market............................................................................. 12
Main features.............................................................................. 12
TX Output Power........................................................................ 12
Mechanical specifications........................................................... 12
2.6.1. Dimensions................................................................................. 12
Temperature Range.................................................................... 13
3. PINS ALLOCATION................................................................... 14
Pin-out........................................................................................ 14
LGA Pads Layout........................................................................ 19
4. POWER SUPPLY....................................................................... 20
Power Supply Requirements....................................................... 20

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Operating Modes........................................................................ 21
Power Consumption ................................................................... 22
General Design Rules................................................................. 23
4.4.1. Electrical Design Guidelines ....................................................... 23
4.4.1.1. +5V/+12V Source Power Supply Design Guidelines................... 23
4.4.1.2. Battery Source Power Supply Design Guidelines........................ 24
4.4.2. Thermal Design Guidelines......................................................... 25
4.4.3. Power Supply PCB layout Guidelines......................................... 26
RTC Bypass out.......................................................................... 26
VAUX Power Output................................................................... 27
5. DIGITAL SECTION .................................................................... 28
Logic Levels................................................................................ 28
Power On.................................................................................... 29
Unconditional Restart.................................................................. 29
5.3.1. PIN DESCRIPTION.................................................................... 29
5.3.2. Operating levels.......................................................................... 30
WAKEUP from PSM ................................................................... 32
5.1.1. Pin Description ........................................................................... 32
5.1.2. Application Example................................................................... 32
Communication ports.................................................................. 35
5.2.1.1. Modem serial port 1.................................................................... 35
5.2.1.2. Modem serial port 2.................................................................... 36
5.2.1.3. RS232 LEVEL TRANSLATION................................................... 37
5.2.2. 3.3V/5V UART level translation................................................... 39
General purpose I/O................................................................... 40
5.3.1. Using a GPIO as INPUT............................................................. 41
5.3.2. Using a GPIO as OUTPUT ......................................................... 41
5.3.3. Indication of network service availability ..................................... 42
External SIM Holder.................................................................... 43
ADC Converter ........................................................................... 43
6. RF SECTION.............................................................................. 44
Antenna requirements................................................................. 44
6.1.1. Main Antenna ............................................................................. 44
6.1.2. PCB Design guidelines............................................................... 45
6.1.2.1. Transmission line design ............................................................ 46
6.1.2.2. Transmission Line Measurements .............................................. 47
6.1.2.3. Antenna Installation Guidelines................................................... 48

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7. MECHANICAL DESIGN............................................................. 49
8. APPLICATION PCB DESIGN .................................................... 50
General....................................................................................... 50
Footprint..................................................................................... 50
PCB pad design.......................................................................... 52
PCB pad dimensions.................................................................. 52
Stencil......................................................................................... 53
Solder paste ............................................................................... 54
Solder Reflow............................................................................. 54
9. PACKAGING.............................................................................. 56
Tray............................................................................................ 56
Reel............................................................................................ 58
Moisture sensitivity ..................................................................... 59
10. SAFETY RECOMMENDATIONS................................................ 60
READ CAREFULLY.................................................................... 60
11. CONFORMITY ASSESSMENT ISSUES .................................... 61
Approvals.................................................................................... 61
Declaration of Conformity ........................................................... 61
12. SAFETY RECOMMENDATIONS................................................ 62
READ CAREFULLY.................................................................... 62
13. REFERENCE TABLE OF RF BANDS CHARACTERISTICS..... 63
14. ACRONYMS............................................................................... 64
15. DOCUMENT HISTORY.............................................................. 66

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1. INTRODUCTION
Scope
This document introduces the Telit NL865H2 modules and presents possible and
recommended hardware solutions for developing a product based on this module. All the
features and solutions detailed in this document are applicable to all NL865H2 variants,
where NL865H2 refers to the variants listed in the applicability table.
Obviously, this document cannot embrace every hardware solution or every product that
can be designed. Where the suggested hardware configurations need not be considered
mandatory, the information given should be used as a guide and a starting point for
properly developing your product with the Telit module.
Audience
This document is intended for Telit customers, especially system integrators, about to
implement their applications using the Telit module.
Contact Information, Support
For general contact, technical support services, technical questions and report
documentation errors contact Telit Technical Support at:
•TS[email protected]
•[e-mail]
•[e-mail]
•[e-mail]
Alternatively, use:
http://www.telit.com/support
For detailed information about where you can buy the Telit modules or for recommendations
on accessories and components visit:
http://www.telit.com
Our aim is to make this guide as helpful as possible. Keep us informed of your comments
and suggestions for improvements.
Telit appreciates feedback from the users of our information.

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Text Conventions
Danger –This information MUST be followed or catastrophic
equipment failure or bodily injury may occur.
Caution or Warning –Alerts the user to important points about
integrating the module, ifthese points are not followed, the module and
end user equipment may fail or malfunction.
Tip or Information –Provides advice and suggestions that may be
useful when integrating the module.
All dates are in ISO 8601 format, i.e. YYYY-MM-DD.

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Related Documents
•AT Commands User Guide, 1VV0301611
•NL865H2 TLB Documentation, 1VV0301629

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2. GENERAL PRODUCT DESCRIPTION
Overview
The NL865H2 is part of a new generation of modules in Telit’s NBIoT module portfolio.
With its compact LGA footprint, it is designed for those m2m applications requiring
miniature foot print.
It is a multi band LTE NBIoT communication product based on the market’ latest NBIoT
core which allows integrators to plan on availability for even the longest lifecycle
applications, highly recommended for new designs specified for NBIoT coverage
worldwide.
It is highly recommended for new designs requiring NBIoT coverage in a small and robust
LGA package, which implies easy integration and low impact on final application size and
costs. Ease of production and small foot print makes it the ideal solution for applications in
security alarms, automated meter reading, and pos terminals.
The NL865H2 operates with 1.8 V GPIOs, minimizing power consumption and making it
even more ideally suited for battery powered and wearable device applications.
Product Variants and Frequency Bands
Product
2G Band
(MHz)
3G Band
(MHz)
4G Band
(MHz)
Region
NL865H2-W1
-
-
B1, B2, B3, B4,
B5, B8, B12, B13,
B18, B19, B20,
B25, B26, B28,
B66, B71, B85
Worldwide
Refer to “RF Section” for details information about frequencies and bands.
NOTE:
The module is supporting the Multi-Frequency Band Indicator (MFBI)

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Target market
NL865H2 can be used for telematics applications where tamper-resistance, confidentiality,
integrity, and authenticity of end-user information are required, for example:
•Telematics services
•Road pricing
•Pay-as-you-drive insurance
•Stolen vehicles tracking
•Internet connectivity
Main features
Function
Features
Modem
•3GPP Rel.14 LTE Cat.NB2
•SMS support (Text and PDU)
•Real Time Clock
Interfaces
•2 UARTs (Main with flow control and Auxiliary with RX TX
only)
•USB 1.1 (debug only)
•I2C (as GPIO Alternate function)
•8 GPIOs
•Antenna pad
TX Output Power
Band
Power class
All Bands
Class 3 (23dB)
Mechanical specifications
2.6.1. Dimensions
The overall dimensions of NL865H2 family are:
Length: 24.4 mm
Width: 24.4 mm
Thickness: 2.25 mm

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Temperature Range
Condition
Range
Note
Operating Temperature Range
-20°C to +55°C
The module is fully functional(*)
within this 3GPP temperature
range and meets 3GPP
specifications.
Extended Temperature Range
-40°C to +85°C
The module is fully functional(*)
within this temperature range.
The RF Performance may
deviate from 3GPP
requirements in this extended
range.
For example: receiver sensitivity
or maximum output power may
deviate by a few dB due to
limitations of physics like higher
thermal noise floor at high
temperature.
Storage Temperature Range
-40°C to +85°C
-
(*) Functional: if applicable, the module is able to make and receive data calls, send and receive
SMS and data traffic.

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3. PINS ALLOCATION
Warning:
NL865H2 is adopting a modified 56-pin xL865 Form Factor, pin to pin
compatible with the previous 48-pin xL865 FF and with 8 additional
pads.
The numbering of the pins has been changed accordingly and
attention has to be paid when comparing with previous 48-pin xL865
FF design.
Pin-out
Pin
Signal
I/O
Function
Type
Comment
Asynchronous Serial Port (USIF0) –Prog. / Data + HW Flow Control
1
C109/DCD
O
Output for Data carrier detect signal (DCD) to
DTE
CMOS 1.8V
2
C125/RING
O
Output for Ring indicator signal (RI) to DTE
CMOS 1.8V
3
C107/DSR
O
Output for Data set ready signal (DSR) to DTE
CMOS 1.8V
4
C108/DTR
I
Input for Data terminal ready signal (DTR) from
DTE
CMOS 1.8V
5
C105/RTS
I
Input for Request to send signal (RTS) from DTE
CMOS 1.8V
6
C106/CTS
O
Output for Clear to send signal (CTS) to DTE
CMOS 1.8V
9
C103/TXD
I
Serial data input (TXD) from DTE
CMOS 1.8V
10
C104/RXD
O
Serial data output (RXD) to DTE
CMOS 1.8V
Auxiliary UART
52
RXD_AUX
I
Auxiliary UART (RX Data)
CMOS 1.8V
53
TXD_AUX
O
Auxiliary UART (TX Data)
CMOS 1.8V

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USB 1.1 (Debug Port)
20
USB_D+
I/O
USB differential Data (+)
19
USB_D-
I/O
USB differential Data (-)
18
VUSB
I
Power sense for the internal USB transceiver.
Compliant to VUSB
from USB V1.1
specification
(from 4.4 V to 5.5V)
SIM card interface
11
SIMVCC
-
External SIM signal –Power supply for the SIM
1.8V
12
SIMRST
O
External SIM signal –Reset
1.8V
13
SIMCLK
O
External SIM signal –Clock
1.8V
14
SIMIO
I/O
External SIM signal –Data I/O
1.8V
DIGITAL IO
48
GPIO_01
I/O
Configurable GPIO01
CMOS 1.8
Default is pull-down
47
GPIO_02
I/O
Configurable GPIO02
CMOS 1.8
Default is pull-down
46
GPIO_03
I/O
Configurable GPIO03
Alternate 1: I2C_SDA
CMOS 1.8
Default is pull-down
45
GPIO_04
I/O
Configurable GPIO04
Alternate 1: I2C_SCL
CMOS 1.8
Default is pull-down
33
GPIO_05
I/O
Configurable GPIO05
Alternate 1: I2C_SDA
CMOS 1.8
Default is pull-down
32
GPIO_06
I/O
Configurable GPIO06
Alternate 1: I2C_SCL
CMOS 1.8
Default is pull-down
31
GPIO_07
I/O
Configurable GPIO07
Alternate 1: I2C_SDA
CMOS 1.8
Default is pull-down
30
GPIO_08
I/O
Configurable GPIO08
Alternate 1: I2C_SCL
Alternate 2: STAT LED
CMOS 1.8
Default is pull-down

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ADC
15
ADC_IN1
I
Analog To Digital converter Input #1
A/D
10-bit, range 0-1.4V
16
ADC_IN2
I
Analog To Digital converter Input #2
A/D
10-bit, range 0-1.4V
RF Section
40
MAIN ANTENNA
I/O
Main Antenna (50 ohm)
RF
Miscellaneous Functions
7
WAKE*
I
Input Command for PSM Wake Up
CMOS 1.8V
Falling edge trigger
55
RESET*
I
Reset
CMOS 1.8V
Active Low
51
VAUX
O
Supply Output for external accessories / Power
ON Monitor
Power
Max10mA
Power Supply
44
VBATT
I
VBATT
Power
Range: 3.0~3.6 V,
recommended
value is 3.3V
43
VBATT_PA
I
VBATT_PA
Power
Range: 3.0~3.6 V,
recommended
value is 3.3V
21
GND
-
Ground
Power
23
GND
-
Ground
Power
27
GND
-
Ground
Power
35
GND
-
Ground
Power
38
GND
-
Ground
Power
39
GND
-
Ground
Power
41
GND
-
Ground
Power
42
GND
-
Ground
Power

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WARNING
Reserved pins must not be connected.
54
GND
-
Ground
Power
RESERVED
8
RESERVED
-
RESERVED
17
RESERVED
-
RESERVED
22
RESERVED
-
RESERVED
24
RESERVED
-
RESERVED
25
RESERVED
-
RESERVED
26
RESERVED
-
RESERVED
28
RESERVED
-
RESERVED
29
RESERVED
-
RESERVED
36
RESERVED
-
RESERVED
37
RESERVED
-
RESERVED
49
RESERVED
-
RESERVED
50
RESERVED
-
RESERVED
56
RESERVED
-
RESERVED

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If not used, almost all pins should be left disconnected. The only exceptions are the
following pins:
RTS pin should be connected to the GND (on the module side) if flow control is not used. The
above pins are also necessary to debug the application when the module is assembled on it so we
recommend connecting them also to dedicated test point.
Pad
Signal
Note
44
VBATT
43
VBATT_PA
21, 23, 27, 35, 38,
39, 41, 42, 54
GND
40
MAIN ANTENNA
9
C103/TXD
10
C104/RXD
5
C105/RTS
6
C106/CTS
11
SIMVCC
12
SIMRST
13
SIMCLK
14
SIMIO
7
WAKE*
55
RESET*
51
VAUX
20
USB_D+
On TP or a Connector
19
USB_D-
On TP or a Connector
18
VUSB
On TP or a Connector

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LGA Pads Layout
TOP VIEW

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4. POWER SUPPLY
The power supply circuitry and board layout are a very important part in the full product
design and they strongly reflect on the product overall performances, hence read carefully
the requirements and the guidelines that will follow for a proper design.
Power Supply Requirements
The external power supply must be connected to VBATT & VBATT_PA signals and must
fulfil the following requirements:
Power Supply
Value
Nominal Supply Voltage
3.3V
Operating Voltage Range
3.00 V÷ 3.60 V
Extended Voltage Range
2.10 V÷ 3.63 V
VBATmin
2.10V
Absolute Maximum Voltage
3.63V
NOTE:
The Operating Voltage Range MUST never be exceeded; care must be
taken when designing the application’s power supply section to avoid having
an excessive voltage drop.
If the voltage drop is exceeding the limits it could cause a Power Off of the
module.
Overshoot voltage (regarding MAX Extended Operating Voltage) and drop in
voltage (regarding MIN Extended Operating Voltage) MUST never be
exceeded.
The electrical design for the Power supply should be made ensuring it will
be capable of a peak current output of at least 500mA.