Delta Electronics LCP-1250 User Manual

RoHS Compliant Single Mode SFP Transceiver for GbE and Fiber Channel

FEATURES

z Compliant with SFP Transceiver SFF-8472

MSA specification with internal calibration

z Compliant with Specifications for IEEE

802.3z/Gigabit Ethernet

z Single + 3.3V Power Supply and TTL Logic

Interface

z EEPROM with Serial ID Functionality z Laser Class 1 Product which comply with the

requirements of IEC 60825-1 and IEC 60825-2

z Duplex LC Connector interface

Description

The LCP-1250 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-1250 series are designed to be

compliant with SFP Multi-source Agreement

(MSA). Digital diagnostic monitoring functions

(Temperature, V

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-1250 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.

, TX optical power, TX laser

Applications

z Gigabit Ethernet

z Switch to Switch interface

z Switched backplane applications

z File server interface

Performance

z LCP-1250B4Mxx: 1310nm DFB laser, 21dB link

budget (40km)

z LCP-1250D4Mxx: 1550nm DFB laser, 17dB link

budget (40km)

z LCP-1250D4Wxx: 1550nm DFB laser, 21dB link

budget (70km)

z LCP-1250D4Rxx: 1550nm DFB laser, 25dB link

budget (80km)

z LCP-1250D4Vxx: 1550nm DFB laser, 30dB link

budget (100km)

DELTA ELECTRONICS, INC.

1 Nov., 2006

Rev. 6B

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

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 V Transmitter Disable Input-Low V Transmitter Fault Pull up Resistor R Transmitter Fault Output-High V Transmitter Fault Output-Low V

Receiver

Receiver Differential Output Voltage VDR 0.35 2 V 3 Receiver LOS Load R LOS Output Voltage-High V LOS Output Voltage-Low V Output Data Rise/Fall Time tr / tf 220 psec 4

Notes:

1. Internally AC coupled and terminated to 100Ohm differential load.

2 VCC+0.3 V

DISH

0 0.8 V

DISL

TX_FAULT

TXFH

TXFL

RXLOS

LOSH

LOSL

4.7 10 k 2

2 VCC+0.3 V 2

0 0.8 V 2

4.7 10 k 2

2 VCC+0.3 V 2

0 0.8 V 2

2. Pull up to V

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

2 Nov., 2006

Rev. 6B

DELTA ELECTRONICS, INC.

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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.) LCP-1250B4Mxx LCP-1250D4Mxx LCP-1250D4Wxx

LCP-1250D4Rxx LCP-1250D4Vxx

Optical Extinction Ratio 9 dB Center Wavelength

LCP-1250B4 Series

LCP-1250D4 Series Spectral Width

LCP-1250B4Mxx (-20dB)

LCP-1250D4 Series (-20dB) Side-mode Suppression Ratio

LCP-1250B4Mxx

SMSR LCP-1250D4 Series Optical Rise/ Fall Time tr/tf 260 psec 1 Relative Intensity Noise RIN -120 dB/Hz Output Eye

Compliant with IEEE 802.3z

Receiver

Sensitivity (Avg.) LCP-1250B4Mxx LCP-1250D4Mxx LCP-1250D4Wxx

LCP-1250D4Rxx LCP-1250D4Vxx

Input Optical Wavelength

LOS-Deasserted (Avg.) LCP-1250B4Mxx LCP-1250D4Mxx LCP-1250D4Wxx

LCP-1250D4Rxx LCP-1250D4Vxx

LOS-Asserted (Avg.) PD -40 dBm LOS-Hysteresis PA-PD 0.5 dB Overload

LCP-1250B4Mxx LCP-1250D4 Series

LCP-1250D4Vxx

Notes:

1. These are unfiltered 20%~80% values

2. The sensitivity is provided at a BER of 1×10

-1 PRBS and ER=9dB.

-3

-4

-3 0 0

1274 1530

1310 1550

1 1 2 5 5

1355 1570

dBm

30 30

-24

-21

-24

dBm 2

-25

-30

1270 1570 nm

-24

-21

-24

dBm

-25

-30

-1

dBm

-9

-12

or better with an input signal consisting of 1250Mb/s,

DELTA ELECTRONICS, INC.

3 Nov., 2006

Rev. 6B

www.deltaww.com

Mask of the eye diagram for the optical transmit signal

SFP Transceiver Electrical Pad Layout

DELTA ELECTRONICS, INC.

4 Nov., 2006

Rev. 6B

www.deltaww.com

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

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.

Note 2 Module disables on high or open

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

DELTA ELECTRONICS, INC.

5 Nov., 2006

Rev. 6B

www.deltaww.com

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