Delta Electronics Single Mode SFP Transceiver LCP-1250B4QDRx User manual

DELTA ELECTRONICS, INC.
1 2008/1/23
Rev. 6G
www.deltaww.com
RoHS Compliant Single Mode SFP Transceiver for GbE and Fiber
Channel
FEATURES
zCompliant with SFP Transceiver SFF-8472
MSA specification with internal calibration
zCompliant with Specifications for IEEE
802.3z/Gigabit Ethernet
zLCP-125B4QDRx compliant with the
1.0625GBd Fiber Channel 100-SM-LC-L FC-PI
Rev.13
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-1250B4QDRx series are hot
pluggable 3.3V Small-Form-Factor transceiver
modules designed expressly for high-speed
communication applications that require rates up
to 1.25Gb/s. The transceiver is data rate
transparent, which means it can support GbE
(1.25Gb/s) as well as 1x Fiber channel
(1.062Gb/s) operations
The LCP-1250B4QDRx series are designed
to be compliant with SFP Multi-source Agreement
(MSA). Digital diagnostic monitoring functions
(Temperature, VCC, TX optical power, TX laser
bias current, and RX received optical power)
compliant with SFF-8472 are also available. See
order information for details.
The post-amplifier of the LCP-1250B4QDRx
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.
Applications
zGigabit Ethernet
zSwitch to Switch interface
zSwitched backplane applications
zFile server interface
Performance
zLCP-1250B4QDRx: 1310nm FP laser, 10.5dB
link budget (10km)

DELTA ELECTRONICS, INC.
2 2008/1/23
Rev. 6G
www.deltaww.com
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
Relative Humidity (non condensation) - 5 85 %
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 2
Transmitter Fault Output-Low VTXFL 0 0.8 V 2
Receiver
Receiver Differential Output Voltage VDR 0.35 2 V 3
Receiver LOS Load RRXLOS 4.7 10 k2
LOS Output Voltage-High VLOSH 2 VCC+0.3 V 2
LOS Output Voltage-Low VLOSL 0 0.8 V 2
Output Data Rise/Fall Time tr / tf220 psec 4
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.
4. These are 20%~80% values

DELTA ELECTRONICS, INC.
3 2008/1/23
Rev. 6G
www.deltaww.com
Optical Characteristics
(VCC=3.3V ±5%, Data Rate=1250Mb/sec, PRBS=27-1 NRZ)
Parameter Symbol Min. Typ. Max. Unit Note
Transmitter
Output Optical Power (Avg.) PO-9.5 -3 dBm
Optical Extinction Ratio 9 dB
Center Wavelength λC1274 1310 1355 nm
Spectral Width (RMS) σ4 nm
Optical Rise/ Fall Time tr/tf260 psec 1
Receiver
Sensitivity (Avg.) PIN -20 dBm 2
Input Optical Wavelength λ1270 1570 nm
LOS-Deasserted (Avg.) PA
-19 dBm
LOS-Asserted (Avg.) PD-36 dBm
LOS-Hysteresis PA-PD0.5 dB
Overload PO-3 dBm
Notes:
1. These are unfiltered 20%~80% values
2. The sensitivity is provided at a BER of 1×10-12or better with an input signal consisting of 1250Mb/s,
27-1 PRBS and ER=9dB.
Mask of the eye diagram for the optical transmit signal

DELTA ELECTRONICS, INC.
4 2008/1/23
Rev. 6G
www.deltaww.com
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.

DELTA ELECTRONICS, INC.
5 2008/1/23
Rev. 6G
www.deltaww.com
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.
6 2008/1/23
Rev. 6G
www.deltaww.com
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

DELTA ELECTRONICS, INC.
7 2008/1/23
Rev. 6G
www.deltaww.com
Package Outline Drawing

DELTA ELECTRONICS, INC.
8 2008/1/23
Rev. 6G
www.deltaww.com
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.
9 2008/1/23
Rev. 6G
www.deltaww.com
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.
10 2008/1/23
Rev. 6G
www.deltaww.com
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 31 1 87 DC
02 07 45 32 2 88 DC
03 00 Note 1 46 35 5 89 DC
04 00 47 30 0 90 DC
05 00 48 42 B 91 DC
06 02 49 34 4 92 68
07 00 50 51 Q 93 B0
08 00 51 44 D 94 02
09 00 52 52 R 95 CS2 Note 8
10 00 53 20 96 00
11 03 54 20 97 00
12 0D 55 20 98 00
13 00 56 41 A 99 00
14 0A Note 2 57 20 100 00
15 64 Note 3 58 20 101 00
16 00 59 20 102 00
17 00 60 05 Note 4 103 00
18 00 61 1E Note 4 104 00
19 00 62 00 105 00
20 44 D 63 CS1 Note 5 106 00
21 45 E 64 00 107 00
22 4C L 65 1A 108 00
23 54 T 66 00 109 00
24 41 A 67 00 110 00
25 20 68 SN Note 6 111 00
26 20 69 SN 112 00
27 20 70 SN 113 00
28 20 71 SN 114 00
29 20 72 SN 115 00
30 20 73 SN 116 00
31 20 74 SN 117 00
32 20 75 SN 118 00
33 20 76 SN 119 00
34 20 77 SN 120 00
35 20 78 SN 121 00
36 00 79 SN 122 00
37 00 80 SN 123 00
38 00 81 SN 124 00
39 00 82 SN 125 00
40 4C L 83 SN 126 00
41 43 C 84 DC Note 7 127 00
42 50 P 85 DC 128 00 Note 9
Notes:
1) Byte 3~10: Code for electronic compatibility or optical compatibility.
2) Byte 14:Transmission distance in km
3) Byte 15: Transmission distance in 100m, distance >25.5km: FFh
4) Byte 60-61: The center wavelength of transmitter
5) Byte 63: Check sum of bytes 0-62.
6) Byte 68-83: Serial number.
7) Byte 84-91: Date code.
8) Byte 95: Check sum of bytes 64-94.