BENEFITS:

Allows the User to Optimize the Bandwidth of the TIA to the Incoming Optical

Line Rate, which Improves the Optical Input Sensitivity at Lower Data Rates and

Provides Superior Interoperability with Legacy Optical Devices

Provides High Gain and Improved Sensitivity

Facilitates an Accurate Measurement of the Incoming Optical Power, Enhancing the

Diagnostics Capabilities of the System without Using External Components

Provides a Positive Bias to the Photodetector, Eliminating the Need for External

Components

Supports Industrial Temperature Applications

Available in a TO-46 Package, Reducing the Time and Costs Associated with the

Design, Assembly and Test of the Receiver

FEA TURES:

Dual Bandwidth Selection

6k

Ω Differential Transimpednace

Linear Optical Power Monitor

On-chip Photo Diode Filter

Extended Operating Temperature

Available as Bare Dice or in a 5-pin TO-46 Package

APPLICA TIONS:

Gigabit Ethernet Transceivers

Fibre Channel Transceivers (1x, 2x and 4x)

Infiniband Transceivers

1/2/4 Gbps Multirate Transimpedance Amplifier

TRANSPORT PRODUCTS

PB-VSC7975,7977-001

VSC7975, VSC7977

APPLICA TION DIAGRAM:

SPECIFICA TIONS:

Input Noise: 400nA

Supply Current: 30mA

Sensitivity at 4.25G (in OMA): 18.4dBm

Max Input Current: 2.2 mA

Supply Voltage: 3.3V

Operating Temp: -40C to +105C (Case)

VCSEL

VSC7977

Receiver

VSC7964

Limiting

Amplifier

and

VCSEL

Driver

Micro

Controller

Two-wire

interface

Controls/Faults

Tx

Rx