Delta Electronics LCP-4250A4CDR Series User manual

DELTA ELECTRONICS, INC.
1 2008/3/18
Rev. 0A
www.deltaww.com
RoHS Compliant 4.25Gb/s Short Wavelength Tri-Rate SFP
Transceiver for Fiber Channel
FEATURES
 Compliant with SFP transceiver SFF-8472
MSA specification and Fiber Channel FC-PI-2
 850nm VCSEL laser
 Built-in digital diagnostic monitoring function
 Compliant with 4.25/2.125/1.0625 Gb/s Fiber
Channel (400/200/100-M5/M5E/M6-SN-I)
 Compliant with Industry Standard RFT
Electrical Connector and Cage
 Duplex LC connector
 Laser Class 1 Product which comply with the
requirements of IEC 60825-1 and IEC 60825-2
Description
The LCP-4250A4CDR series are hot pluggable
3.3V Small-Form-Factor transceiver modules
designed expressly for high-speed
communication applications that require rates of
up to 4.25Gb/s. It is compliant with the Fiber
Channel standards FC-PI-2, as well as MSA
SFF-8472.
The LCP-4250A4CDR transceivers provide with
the LC receptacle that is compatible with the
industry standard LCTM connector. The
transceiver is also compatible with industry
standard RFT connector and cage.
The post-amplifier of the LCP-4250A4CDR also
includes a LOS (Loss Of Signal) circuit that
provides a TTL logic-high output when an
unusable optical signal level is detected.
The LCP-4250A4CDR transceiver is a Class 1
eye safety product. The optical power levels,
under normal operation, are at eye safe level.
Applications

Tri-Rate 1.063/2.125/4.25 Gb/s Fiber Channel

Up to 400m link over OM3 MMF for 3.072Gbps
CPRI application
Transmission Distances
Data Rate OM3 MMF OM2 MMF OM1 MMF
4.25Gb/s 380m 150m 70m
2.125Gb/s 500m 300m 150m
1.0625Gb/s 860m 550m 300m

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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
Electrical Characteristics
(VCC=3.135V to 3.465V)
Parameter Symbol Min. Typ. Max. Unit Note
Total Supply Current ICC 180 300 mA
Transmitter
Transmitter Differential Input Voltage Vin,pp 0.5 2.4 V 2
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3
Transmitter Fault Output-High VTXFH 2 VCC+0.3 V
Transmitter Fault Output-Low VTXFL 0 0.8 V
Receiver
Receiver Differential Output Voltage Vout,pp 0.3 1 V 4
Receiver LOS Load RRXLOS 4.7 10 k3
LOS Output Voltage-Low VLOSH 2 VCC+0.3 V
LOS Output Voltage-High VLOSL 0 0.8 V
Output Data Rise/Fall Time tr/ tf120 psec 5
Notes:
1. See Ordering information for detail
2. Internally AC coupled and terminated to 100 Ohm differential load.
3. Pull up to VCC on host Board.
4. Internally AC coupled, but requires a 100 Ohm differential termination at or internal to Serializer/ Deserializer.
5. Unfiltered, 20 – 80%.

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Optical Characteristics
(VCC=3.135V to 3.465V, Data Rate=4.25Gb/sec, PRBS=27-1 NRZ, 50/125µm MMF)
Parameter Symbol Min. Typ. Max. Unit Note
Transmitter
Output Optical Power (Avg.) PO-9 -3 dBm 1
Optical Modulation Amplitude
@ 4.25 Gb/s
@ 2.125 Gb/s
@ 1.0625 Gb/s
OMA
247
196
156
µW 2
Center Wavelength λ830 860 nm
Spectral Width (RMS) σ0.85 nm
Optical Rise/Fall Time (20% - 80%) tr/ tf90/90 psec 3
Relative Intensity Noise RIN -118 dB/Hz
Output Eye Complies with the ANSI FC-PI Rev. 13 specification, and is class 1
laser eye safety
Receiver
Average Receiver Power Px (MAX) -3 dBm
.
Sensitivity in OMA
@ 4.25 Gbit/s
@ 2.125 Gb/s
@ 1.062 Gb/s
PIN
61
49
31
uW 4
Input Optical Wavelength 830 870 nm
LOS-De-asserted (Avg.) PD-19 dBm
LOS-Asserted (Avg.) PA-30 dBm
LOS-Hysteresis PD-PA0.5 dB
Optical Return Loss ORL 12 dB
Notes:
1. Into multimode fiber, 62.5µm or 50µm diameter.
2. Equivalent extinction ratio specification for Fiber Channel. Allows smaller ER at higher average power.
3. Measured at nominal data rate. These are unfiltered 20%~80% values.
4. The sensitivity is tested at a BER of 1×10-12 or better with an input signal consisting of 27-1 NRZ PRBS.
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 1&2 or 2&4 Gbit/s 3 Note 4, Open or Low = 1.063Gb/s, High
= 2.125Gb/s or 4.25Gb/s
8 LOS Loss of Signal 3 Note 5
9 VeeR Receiver Ground 1 Note 6
10 VeeR Receiver Ground 1 Note 6
11 VeeR Receiver Ground 1 Note 6
12 RD- Inv. Received Data Out 3 Note 7
13 RD+ Received Data Out 3 Note 8
14 VeeR Receiver Ground 1 Note 6
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 6
18 TD+ Transmit Data In 3 Note 9
19 TD- Inv. Transmit Data In 3 Note 9
20 VeeT Transmitter Ground 1 Note 6
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) In accordance to SFF Committee SFF-8079 Draft Rev. 1.6.
5) 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.
6) VeeR and VeeT may be internally connected within the SFP module.
7) 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.
8) 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 300 mA. 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 30 mA greater than the
steady state value. VccR and VccT may be internally connected within the SFP transceiver module.
9) 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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Recommend Circuit Schematic
Laser Diode
Photo Diode
1uH
1uH
0.1uF
10uF
0.1uF
0.01uF
0.01uF
0.01uF
0.01uF
0.1uF
10uF
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
Rate Select Rate Select
30k Ohms

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Package Outline Drawing for Metal Housing with Bail de-latch
Complies with 21 CFR
1040.10 and 1040.11
Made in x FS

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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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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(Note)
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
Note:
1) Write the password (11h, 11h, 11h, 11h) on the bytes of 123-126 of address A2h then the address of
bytes 128-255 (User Writable) can be read and written.

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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 PN 86 DC
01 04 44 PN 87 DC
02 07 45 PN 88 DC
03 00 46 PN 89 DC
04 00 47 PN 90 DC
05 00 48 PN 91 DC
06 00 49 PN 92 68
07 40 50 PN 93 F8
08 40 51 PN 94 02
09 0C 52 PN 95 CS2 Note 8
10 15 53 PN 96 00
11 03 54 PN 97 00
12 2B 55 PN 98 00
13 00 56 30 99 00
14 00 57 30 100 00
15 00 58 30 101 00
16 0F Note 1 59 0A 102 00
17 07 Note 2 60 CW Note 4 103 00
18 00 61 CW Note 4 104 00
19 26 62 00 105 00
20 44 D 63 CS1 Note 5 106 00
21 45 E 64 00 107 00
22 4C L 65 3A 108 00
23 54 T 66 00 109 00
24 41 A 67 75 110 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 PN Note3 83 SN 126 00
41 PN 84 DC Note 7 127 00
42 PN 85 DC 128 00 Note9
Notes:
1) Byte 16: Link length supported for 50/125μm MM fiber, units of 10 m.
2) Byte 17: Link length supported for 62.5/125μm MM fiber, units of 10 m.
3) Byte 40-55: Delta part number
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.

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9) Byte 128 to 255 had been set hex 00.
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.)+15
02-03 2 Temp Low Alarm TC (MIN.)
04-05 2 Temp High Warning TC (MAX.)+10
06-07 2 Temp Low Warning TC (MIN.)+10
℃1
08-09 2 Voltage High Alarm Vcc+5%
10-11 2 Voltage Low Alarm Vcc-5%
12-13 2 Voltage High Warning Vcc+3%
14-15 2 Voltage Low Warning Vcc-3%
Volt
16-17 2 Bias High Alarm IOP+10
18-19 2 Bias Low Alarm IOP-5
20-21 2 Bias High Warning IOP+7
22-23 2 Bias Low Warning IOP-3
mA 2
24-25 2 TX Power High Alarm P+3
26-27 2 TX Power Low Alarm P-3
28-29 2 TX Power High Warning P+2
30-31 2 TX Power Low Warning P-2
dBm 3
32-33 2 RX Power High Alarm P0+3
34-35 2 RX Power Low Alarm PS-2
36-37 2 RX Power High Warning P0+2
38-39 2 RX Power Low Warning PS
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) P: Operating optical power of transmitter at room temperature.
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 ±1.5dB
RX Optical Power ±3dB
Notes:
1) Temperature is measured internal to the transceiver
2) Voltage is measured internal to the transceiver

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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-4250A4CDRX1
X1: Temperature
Blank: -5 to +70 degree C
H: -10 to +85 degree C
T: -40 to +85 degree C