Delta Electronics LCP-1250A4FDRx User Manual

RoHS Compliant Multimode SFP Transceiver for GbE and Fiber Channel

FEATURES

Description

The LCP-1250A4FDRx 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-1250A4FDRx series are designed to

be compliant with SFF-8472 SFP Multi-source

Agreement (MSA) with digital diagnostic

monitoring functions: Temperature, V

optical power, TX laser bias current, and RX

received optical power.

The post-amplifier of the LCP-1250A4FDRx

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

 Compliant with SFP Transceiver SFF-8472

MSA specification with internal calibration

 Compliant with Specifications for IEEE

802.3z/Gigabit Ethernet

 Compliant with the 1.0625GBd Fiber Channel

FC-PI 100-M5-SN-I Rev.13

 Single + 3.3V Power Supply and TTL Logic

Interface

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

requirements of IEC 60825-1 and IEC 60825-2

 Duplex LC Connector interface

Applications

 Gigabit Ethernet

 Switch to Switch interface

 Switched backplane applications

 File server interface

Performance

 850nm VCSEL Link up to 550m in 50/125µm

Multi Mode Fiber

DELTA ELECTRONICS, INC.

1 Oct., 2006

Rev. 6F

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 180 300 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

DISH

DISL

TX_FAULT

TXFH

TXFL

Receiver

Receiver Differential Output Voltage VDR 0.35 1 2 V 3 Receiver LOS Load R LOS Output Voltage-High V LOS Output Voltage-Low V Output Data Rise/Fall Time tr / t

RXLOS

LOSH

LOSL

Notes:

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

2 VCC+0.3 V 0 0.8 V

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

220 psec 4

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 Oct., 2006

Rev. 6F

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.) P

-9.5 -4 Optical Extinction Ratio ER 9 dB Center Wavelength Spectral Width (RMS) Optical Rise/ Fall Time

λ σ

r/tf

830 850 860 nm

0.85 nm 260 pec 1

Receiver

Sensitivity (Avg.) P Input Optical Wavelength

LOS-Deasserted (Avg.) P LOS-Asserted (Avg.) P LOS-Hysteresis PA-P Overload P

-17

850 nm

-17

-30 dBm

0.5 dB

-3 dBm

Notes:

1. These are unfiltered 20%~80% values

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

-1 PRBS and ER=9dB.

-12

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

dBm

dBm 2

dBm

Mask of the eye diagram for the optical transmit signal

DELTA ELECTRONICS, INC.

3 Oct., 2006

Rev. 6F

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

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

DELTA ELECTRONICS, INC.

4 Oct., 2006

Rev. 6F

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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.

5 Oct., 2006

Rev. 6F

www.deltaww.com

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