BENEFITS:

Source Terminated Differential Outputs With Linear Photocurrent Monitor

Offers Diagnostic Capabilities Without Sacrificing High Signal Integrity

On-chip Filter Provides Positive Bias to the Photodetector, Eliminating

the Need for External Components, Saving Space and Cost

Available in a TO-46 Package, Eliminating Time and Costs Associated

With the Design, Assembly and Test of the Receiver

SPECIFICA TIONS:

Input Noise: 550 nA (rms)

Supply Current: 25 mA

Sensitivity : -23 dBm (long wave) -21.5 dBm (short wave)

Max Input Current: 2.2 mA Peak to Peak Current

Power Dissipation: 82.5 mW

Supply Voltage: 3.3 V

Operating Temperature from -40

°C to 85°C

- VSC7773: TO-46 (with 850nm PIN detector)

- VSC7970: Dice or TO-46 (with 1310nm/1550nm PIN detector)

- VSC7971: Dice or TO-46 (with 1310nm/1550nm PIN detector)

- VSC7972: Dice or TO-46 (with 850nm pin detector)

- VSC7973: Dice or TO-46 (with 850nm pin detector)

BLOCK DIAGRAM (Die):

1 to 4 Gbps Transimpedance Amplifiers with Photocurrent Monitor

PRODUCT F AMIL Y :

VSC7773

VSC7970

VSC7971

VSC7972

VSC7973

APPLICA TIONS:

Gigabit Ethernet Transceivers

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

SONET/SDH Transceivers

SONET/SDH Transponders

4.25 Gbps Receiver Optical Sub-Assemblies

FEA TURES:

Single +3.3 V Supply

5 k

Ω Differential Transimpedance

Low Power Consumption for SFP/SFF Applications

Differential Outputs with Linear Current Monitor

Available as Bare Dice or in a 4-pin or 5-pin TO-46 Package

TRANSPORT PRODUCTS

PB-TIAFAMILY-001

50

Ω

500

Ω

VSC7971

+3.3V

0.1

µF

VOUTP

VCC

Outputs need to

be AC-coupled

VOUTN

IMON

0.1

µF

50

Ω

Monitor

FILTER

10pF

IN

GND