Overview

GSFP-ZX-80KM

The SFP transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps and 80KM transmission distance with SMF.The transceiver consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.The transceivers are compatible with SFP Multi Source Agreement (MSA). For further information, please refer to SFP MSA.

  Application

  • Gigabit Ethernet
  • Fiber Channel
  • Switch to Switch interface
  • Switched backplane applications
  • Router/Server interface
  • Other optical transmission systems
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  Features

  • Dual data-rate of 1.25Gbps operation
  • 1550nm FP laser and PIN photo detector for 80km transmission
  • Compliant with SFP MSA and SFF-8472 with Duplex LC receptacle
  • Digital Diagnostic Monitoring
  • Internal Calibration or External Calibration
  • Compatible with RoHS

❖ +3.3V single power supply

  • Operating case temperature:
  • Standard : 0 to +70°C
  • Industrial : -40°C to +85°C

Specification

Conditions by the 2-wire serial interface (SCL, SDA).

The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.

The digital diagnostic memory map specific data field defines as following.

Pin Definitions

Pin Description

Pin

Signal Name

Description

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

4

MOD_DEF(2)

SDA Serial Data Signal

3

Note 3

5

MOD_DEF(1)

SCL Serial Clock Signal

3

Note 3

6

MOD_DEF(0)

TTL Low

3

Note 3

7

Rate Select

Not Connected

3

8

LOS

Loss of Signal

3

Note 4

9

VEER

Receiver ground

1

10

VEER

Receiver ground

1

11

VEER

Receiver ground

1

12

RD-

Inv. Received Data Out

3

Note 5

13

RD+

Received Data Out

3

Note 5

14

VEER

Receiver ground

1

15

VCCR

Receiver Power Supply

2

16

VCCT

Transmitter Power Supply

2

17

VEET

Transmitter Ground

1

18

TD+

Transmit Data In

3

Note 6

19

TD-

Inv. Transmit Data In

3

Note 6

20

VEET

Transmitter Ground

1

Notes:

Plug Seq.: Pin engagement sequence during hot plugging.

  1. TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; Logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 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 4.7k~10kΩ resistor. It’s states are:

Low (0 to 0.8V): Transmitter on

(>0.8V, < 2.0V): Undefined

High (2.0 to 3.465V): Transmitter Disabled Open: Transmitter Disabled

  1. Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7k~10kΩ resistor on the host board. The pull-up voltage shall be VccT or VccR.

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

  1. LOS is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor. Pull up voltage between 2.0V and Vcc+0.3V. Logic 1 indicates loss of signal; Logic 0 indicates normal operation. In the low state, the output will be pulled to less than 0.8V.
  1. RD-/+: These are the differential receiver outputs. They are internally AC-coupled 100 differential lines which should be terminated with 100Ω (differential) at the user SERDES.
  2. TD-/+: These are the differential transmitter inputs. They are internally AC-coupled, differential lines with 100Ω differential termination inside the module.
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