Delta Electronics SFP Transceiver LCP-2488B4HDRx User manual

DELTA ELECTRONICS, INC.
1 2008/3/14
Rev. 0B
www.deltaww.com
RoHS Compliant SFP Transceiver for SONET OC-48/SDH STM-16 with
Digital Diagnostic Monitoring Function
FEATURES
zCompliant with SFP Transceiver SFF-8472
MSA specification with internal calibration
zLCP-2488B4HDR compliant with Intra-office
SONET OC-48 / SDH STM-16 (I-16.1)
zSingle + 3.3V Power Supply and TTL Logic
Interface
zEEPROM with Serial ID Functionality
zLaser Class 1 Product which comply with the
requirements of IEC 60825-1 and IEC 60825-2
zDuplex LC Connector interface
Description
The LCP-2488B4HDRx series are hot
pluggable 3.3V Small-Form-Factor transceiver
modules designed expressly for high-speed
communication applications that require rates up to
2.5Gb/s.
The LCP-2488B4HDRx series are designed
to be compliant with SFF-8472 SFP Multi-source
Agreement (MSA) with digital diagnostic
monitoring functions: Temperature, VCC, TX
optical power, TX laser bias current, and RX
received optical power.
The post-amplifier of the LCP-2488B4HDRx
series also includes a Loss of Signal (LOS) circuit
that provides a TTL logic-high output when the
received optical level is below a preset LOS
Assert threshold.
Performance
Part number Link
budget
Distance in
SMF
LCP-2488B4HDR 8dB 2km

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Absolute Maximum Ratings
Parameter Symbol Min. Typ. Max. Unit Note
Storage Temperature Ts -40 85 ºC
Supply Voltage VCC 0 5 V
Recommended Operating Conditions
Parameter Symbol Min. Typ. Max. Unit Note
Case Operating Temperature TC-5 70 ºC 1
Supply Voltage VCC 3.135 3.465 V
Note 1: See order information
Electrical Characteristics
(VCC=3.3V ±5%)
Parameter Symbol Min. Typ. Max. Unit Note
Total Supply Current ICCT 300 mA
Transmitter
Transmitter Differential Input Voltage VDT 0.5 2.4 V 1
Transmitter Disable Input-High VDISH 2 VCC+0.3 V
Transmitter Disable Input-Low VDISL 0 0.8 V
Transmitter Fault Pull up Resistor RTX_FAULT 4.7 10 k2
Transmitter Fault Output-High VTXFH 2 VCC+0.3 V
Transmitter Fault Output-Low VTXFL 0 0.8 V
Receiver
Receiver Differential Output Voltage VDR 0.35 1 2 V 3
Receiver LOS Load RRXLOS 4.7 10 k2
LOS Output Voltage-High VLOSH 2 VCC+0.3 V
LOS Output Voltage-Low VLOSL 0 0.8 V
Notes:
1. Internally AC coupled and terminated to 100Ohm differential load.
2. Pull up to VCC on host Board
3. Internally AC coupled, but requires a 100Ohm differential termination at or internal to Serializer/
Deserializer.

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Optical Characteristics
Transmitter
(VCC=3.3V ±5%, Data Rate=2488Mb/sec, PRBS=223-1 NRZ)
Parameter Symbol Min. Typ. Max. Unit Note
Output Optical Power (Avg.) P -10 -3 dBm
Optical Extinction Ratio ER 8.2 dB
Center Wavelength λC1266 1310 1360 nm
Spectral Width σ4 nm
Optical Rise/ Fall Time tr/tf150/200 psec 1
Relative Intensity Noise RIN -120 dB/Hz
Total Jitter (Peak to Peak) TJPP 50 ps
Output Eye Compliant with GR-253 and ITU recommendation G.957
Receiver
(VCC=3.3V ±5%, Data Rate=2488Mb/sec, PRBS=223-1 NRZ)
Parameter Symbol Min. Typ. Max. Unit Note
Sensitivity (Avg.) PS-18 dBm 2
Input Optical Wavelength λ1266 1310 1360 nm
LOS-Deasserted (Avg.) PA
-20 dBm
LOS-Asserted (Avg.) PD-45 dBm
LOS-Hysteresis PA-PD0.5 dB
Overload P0-3 dBm
Reflectance r -12 dB
Notes:
1. These are unfiltered 20%~80% values
2. The sensitivity is provided at a BER of 1×10-12 or better with an input signal consisting of 2488Mb/s,
223-1 PRBS and ER=9dB.
Mean level of logical “1”
Mean level of logical “0”
Amplitude
Time
Optical Pulse Mask with Bessel Filter Specified in ITU-T G.957
1.25
1.00
0.75
0.25
0.00
-0.25
Mean level of logical “1”
Mean level of logical “0”
Amplitude
Time
Optical Pulse Mask with Bessel Filter Specified in ITU-T G.957
1.25
1.00
0.75
0.25
0.00
-0.25
Mask of the eye diagram for the optical transmit signal

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SFP Transceiver Electrical Pad Layout
Pin Function Definitions
Pin Num. Name Function Plug Seq. Notes
1 VeeT Transmitter Ground 1
2 TX Fault Transmitter Fault Indication 3 Note 1
3 TX Disable Transmitter Disable 3 Note 2
Module disables on high or open
4 MOD-DEF2 Module Definition 2 3 Note 3, 2 wire serial ID interface
5 MOD-DEF1 Module Definition 1 3 Note 3, 2 wire serial ID interface
6 MOD-DEF0 Module Definition 0 3 Note 3, Grounded in Module
7 Rate Select Not Connect 3 Function not available
8 LOS Loss of Signal 3 Note 4
9 VeeR Receiver Ground 1 Note 5
10 VeeR Receiver Ground 1 Note 5
11 VeeR Receiver Ground 1 Note 5
12 RD- Inv. Received Data Out 3 Note 6
13 RD+ Received Data Out 3 Note 7
14 VeeR Receiver Ground 1 Note 5
15 VccR Receiver Power 2 3.3 ± 5%, Note 7
16 VccT Transmitter Power 2 3.3 ± 5%, Note 7
17 VeeT Transmitter Ground 1 Note 5
18 TD+ Transmit Data In 3 Note 8
19 TD- Inv. Transmit Data In 3 Note 8
20 VeeT Transmitter Ground 1 Note 5
Plug Seq.: Pin engagement sequence during hot plugging.

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Notes:
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10Kresistor on the host
board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output indicates a laser fault of some kind.
Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.
2) TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module
with a 4.7 – 10 K resistor. Its states are:
Low (0 – 0.8V): Transmitter on
(>0.8, < 2.0V): Undefined
High (2.0 – 3.465V): Transmitter Disabled
Open: Transmitter Disabled
3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K – 10Kresistor on the
host board. The pull-up voltage shall be VccT or VccR (see Section IV for further details). Mod-Def 0 is grounded
by the module to indicate that the module is present Mod-Def 1 is the clock line of two wire serial interface for
serial ID Mod-Def 2 is the data line of two wire serial interface for serial ID
4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10Kresistor.
Pull up voltage between 2.0V and VccT, R+0.3V. When high, this output indicates the received optical power is
below the worst-case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In
the low state, the output will be pulled to < 0.8V.
5) VeeR and VeeT may be internally connected within the SFP module.
6) RD-/+: These are the differential receiver outputs. They are AC coupled 100differential lines which should be
terminated with 100(differential) at the user SERDES. The AC coupling is done inside the module and is thus
not required on the host board. The voltage swing on these lines will be between 370 and 2000 mV differential
(185 – 1000 mV single ended) when properly terminated.
7) VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the SFP
connector pin. Maximum supply current is 300mA. Recommended host board power supply filtering is shown
below. Inductors with DC resistance of less than 1 ohm should be used in order to maintain the required voltage
at the SFP input pin with 3.3V supply voltage. When the recommended supply-filtering network is used, hot
plugging of the SFP transceiver module will result in an inrush current of no more than 30mA greater than the
steady state value. VccR and VccT may be internally connected within the SFP transceiver module.
8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100
differential termination inside the module. The AC coupling is done inside the module and is thus not
required on the host board. The inputs will accept differential swings of 500 – 2400 mV (250 – 1200
mV single-ended), though it is recommended that values between 500 and 1200 mV differential (250 –
600 mV single-ended) be used for best EMI performance.

DELTA ELECTRONICS, INC.
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Rev. 0B
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Recommend Circuit Schematic
Laser Diode
Photo Diode
1uH
1uH
0.1uF10uF
0.1uF
0.01uF
0.01uF
0.01uF
0.01uF
0.1uF10uF
RES1
RES1
100 Ohms*
RES1 RES1 RES1
10k Ohms
100 Ohms
VCC
Protocol Vcc
SerDes ICProtocol IC
PLD / PAL Mod_def 2
Mod_def 1
Mod_def 0
3.3V
3.3V
DELTA SFP Module
Preamp &
Tx_Disable
Quantizer
Tx_Fault
TD +
TD -
VeeT
RD +
RD -
Rx_LOS
VeeR
Tx_Disable
Tx_Fault
Rx_LOS
RES1 = 4.7k to 10k Ohms
VccT
VccR
Laser Driver
* Depands on SerDes IC used
EEPROM

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Rev. 0B
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SFP timing parameters for SFP management
Parameter Symbol Min. Max. Unit Note
TX_DISABLE Assert time t_off 10 μsec 1
TX_DISABLE Negate time t_on 1 msec 2
Time to initialize, including
reset of TX_FAULT t_init 300 msec 3
TX Fault Assert Time t_fault 100 μsec 4
TX_DISABLE to reset t_rest 10 μsec 5
LOS Assert Time t_loss_on 100 μsec 6
LOS Deassert Time t_loss_off 100 μsec 7
Serial ID Clock Rate f_serial_clock 100 kHz
Notes:
1) Time from rising edge of TX_DISABLE to when the optical output falls below 10% of nominal
2) Time from falling edge of TX_DISABLE to when the modulated optical output rises above 90% of
nominal
3) From power on or negation of TX_Fault using TX Disable
4) Time from fault to TX fault on.
5) Time TX Disable must be held high to reset TX_Fault
6) Time from LOS state to Rx LOS assert
7) Time from non-LOS state to Rx LOS deassert

DELTA ELECTRONICS, INC.
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Package Outline Drawing
Complies with 21 CFR
1040.10 and 1040.11
Made in x FS

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Rev. 0B
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Enhanced Digital Diagnostic Interface
The memory map in the following describes an extension to the memory map defined in SFP MSA.
The enhanced interface uses the two wire serial bus address 1010001X(A2h) to provide diagnostic
information about the module’s present operating conditions.
2 wire address 1010000 X (A0h) 2 wire address 1010001 X (A2h)
0 0
55
Alarm and Warning Thresholds
(56 bytes)
95
Serial ID Defined by SFP MSA
(96 bytes) 56
95
Cal Constants
(40 bytes)
96 96
119
Real Time Diagnostic Interface
(24 bytes)
127
Vender Specific
(32 bytes) 120
127
Vender Specific
128 128
247
User Writable EEPROM
(120 bytes)
255
Reserved in SFP MSA
(128 bytes)
248
255
Vender Specific
(8 bytes)
Digital Diagnostic Memory Map Specific Data Field Descriptions

DELTA ELECTRONICS, INC.
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Rev. 0B
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EEPROM Serial ID Memory Contents (2-Wire Address A0h)
Address Hex ASCII Address Hex ASCII Address Hex ASCII
00 03 43 2D - 86 DC
01 04 44 32 2 87 DC
02 07 45 34 4 88 DC
03 00 46 38 8 89 DC
04 11 47 38 8 90 DC
05 00 48 42 B 91 DC
06 00 49 34 4 92 68
07 00 50 48 H 93 B0
08 00 51 44 D 94 02
09 00 52 52 R 95 CS2 Note 5
10 00 53 20 Note 1 96 VS Note 6
11 03 54 20 97 VS
12 19 55 20 98 VS
13 00 56 41 99 VS
14 02 57 20 100 VS
15 14 58 20 101 VS
16 00 59 20 102 VS
17 00 60 05 103 VS
18 00 61 1E 104 VS
19 00 62 00 105 VS
20 44 D 63 CS1 Note 2 106 VS
21 45 E 64 00 107 VS
22 4C L 65 1A 108 VS
23 54 T 66 00 109 VS
24 41 A 67 00 110 VS
25 20 68 SN Note 3 111 VS
26 20 69 SN 112 VS
27 20 70 SN 113 VS
28 20 71 SN 114 VS
29 20 72 SN 115 VS
30 20 73 SN 116 VS
31 20 74 SN 117 VS
32 20 75 SN 118 VS
33 20 76 SN 119 VS
34 20 77 SN 120 VS
35 20 78 SN 121 VS
36 00 79 SN 122 VS
37 00 80 SN 123 VS
38 00 81 SN 124 VS
39 00 82 SN 125 VS
40 4C L 83 SN 126 VS
41 43 C 84 DC Note 4 127 VS
42 50 P 85 DC 128 00 Note 7
Notes:
1) Byte 40-55: Delta part number.
2) Byte 63: Check sum of bytes 0-62.
3) Byte 68-83: Serial number.
4) Byte 84-91: Date code.
5) Byte 95: Check sum of bytes 64-94.
6) Byte 96 to 127 are vendor specific contents.
7) Byte 128 to 255 had been set hex 00.

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Digital Diagnostic Monitoring Interface
Alarm and Warning Thresholds (2-Wire Address A2h)
Address #
Bytes Name Value (Dec.) Unit Note
00-01 2 Temp High Alarm TC (MAX.)+8
02-03 2 Temp Low Alarm TC (MIN.)-8
04-05 2 Temp High Warning TC (MAX.)+3
06-07 2 Temp Low Warning TC (MIN.)-3
℃1
08-09 2 Voltage High Alarm Vcc+0.5
10-11 2 Voltage Low Alarm Vcc-0.5
12-13 2 Voltage High Warning Vcc+0.2
14-15 2 Voltage Low Warning Vcc-0.2
Volt
16-17 2 Bias High Alarm IOP*2+20
18-19 2 Bias Low Alarm IOP-20
20-21 2 Bias High Warning IOP *2+10
22-23 2 Bias Low Warning IOP -10
mA 2
24-25 2 TX Power High Alarm Ph+2
26-27 2 TX Power Low Alarm Pl-2
28-29 2 TX Power High Warning Ph+1
30-31 2 TX Power Low Warning Pl-1
dBm 3
32-33 2 RX Power High Alarm P0+2
34-35 2 RX Power Low Alarm PS-2
36-37 2 RX Power High Warning P0+1
38-39 2 RX Power Low Warning PS-1
dBm 4
40-45 16 Reversed
56-91 36 External Calibration Constants
92-94 3 Reversed
95 1 Checksum 5
96-97 2 Real Time Temperature
98-99 2 Real Time Supply Voltage
100-101 2 Real Time Tx Bias Current
102-103 2 Real Time Tx Optical Power
104-105 2 Real Time Rx Received Power
106-109 4 Reserved
110 1 Optional Status/ Control Bits 6
111 1 Reserved
112-119 8 Optional Set of Alarm and Warning 7
Notes:
1) TC: Case Operating temperature
2) IOP: Operating current at room temperature. The min. setting current is 0 mA.
3) Ph: Maximum value of transmitter optical power
Pl: Minimum value of transmitter optical power
4) P0: Overload optical power of receiver
PS: Sensitivity optical power of receiver
5) Byte 95 contains the low order 8bits of sum of bytes 0-94

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6)
State/ Control Bits
Byte Bit Name Description
110 7 Tx Disable State Digital state of the Tx disable input pin
110 6 Soft Tx Disable Read/ Write bit that allow software disable of laser
110 5 Reserved
110 4 Rate Select tate NA
110 3 Soft Rate Select NA
110 2 Tx Fault Digital state of the Tx fault output pin
110 1 LOS Digital state of the LOS output pin.
110 0 Data_Ready_Bar NA
7)
Optional Set of Alarm and Warning
Byte Bit Name Description
112 7 Temp High Alarm Set when internal temperature exceeds high alarm level
112 6 Temp Low Alarm Set when internal temperature is below low alarm level
112 5 Vcc High Alarm Set when internal supply voltage exceeds high alarm level
112 4 Vcc Low Alarm Set when internal supply voltage is below low alarm level
112 3 Tx Bias High Alarm Set when Tx Bias current exceeds high alarm level
112 2 Tx Bias Low Alarm Set when Tx Bias current is below low alarm level
112 1 Tx Power High Alarm Set when Tx output power exceeds high alarm level
112 0 Tx Power Low Alarm Set when Tx output power is below low alarm level
113 7 Rx Power High Alarm Set when received power exceeds high alarm level
113 6 Rx Power Low Alarm Set when received power is below low alarm level
113 5-0 Reserved
116 7 Temp High Warning Set when internal temperature exceeds high warning level
116 6 Temp Low Warning Set when internal temperature is below low warning level
116 5 Vcc High Warning Set when internal supply voltage exceeds high warning level
116 4 Vcc Low Warning Set when internal supply voltage is below low warning level
116 3 Tx Bias High Warning Set when Tx Bias current exceeds high warning level
116 2 Tx Bias Low Warning Set when Tx Bias current is below low warning level
116 1 Tx Power High Warning Set when Tx output power exceeds high warning level
116 0 Tx Power Low Warning Set when Tx output power is below low warning level
117 7 Rx Power High Warning Set when received power exceeds high warning level
117 6 Rx Power Low Warning Set when received power is below low warning level
117 5-0 Reserved
Digital Diagnostic Monitor Accuracy
Parameter Typical Value Note
Transceiver Temperature ±3℃1
Power Supply Voltage ±3% 2
TX Bias Current ±10%
TX Optical Power ±2dB
RX Optical Power ±2dB
Notes:
1) Temperature is measured internal to the transceiver
2) Voltage is measured internal to the transceiver

DELTA ELECTRONICS, INC.
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Regulatory Compliance
Test Item Reference Qty’ Evaluation
(#1)
Electromagnetic Interference
EMC
FCC Class B
EN 55022 Class B
CISPR 22
5
(#2) Immunity：
Radio Frequency
Electromagnetic Field
EN 61000-4-3
IEC 1000-4-3 5
(#3) Immunity：
Electrostatic Discharge to the
Duplex SC Receptacle
EN 61000-4-2
IEC 1000-4-2
IEC 801.2
5
(#4) Electrostatic Discharge to
the Electrical Pins MIL-STD-883C
Method 3015.4
EIAJ#1988.3.2B
Version 2,
Machine model
5
(1) Satisfied with electrical characteristics of
product spec.
(2) No physical damage
Ordering information for SFP modules
LCP-2488B4HDRX1
X1: Temperature
Blank: -5 to +70 degree C
H: -10 to +85 degree C
T: -40 to +85 degree C