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TM

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manufacturability. All information in this document, including descriptions of features, functions, performance, technical specifications and availability, is

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VSC7965

VSC7965

Laser Driver

DATA

Modulation and

Bias Control and Montoring

DATAN

OUT

OUTN

BEN

BENN_TX_DIS

BSNK

AOUT

MD

TX_FAULT

BSNKN

Limiting Amplifier

LIN

S1

LOUT

LOUTN

S5

DCRST2

Peak

Detector

and

Control

LOS

100 Ω

S2

S4

S3

DCRST1

RPK_STAGE

DCRST[1:0]

DCRST[1:0]

LA_SQMON

LOSMON

Output

Control

LA_SQSRC

LA_SQFORCE

7 kΩ

GENERAL DESCRIPTION:

BLOCK DIAGRAMS:

PON Integrated Burst-mode Laser Driver and Limiting Amplifier

The VSC7965 is a multirate 1.25 Gbps integrated

laser driver and limiting amplifier for Passive

Optical Network applications optimized to reduce

module cost. The device is intended to drive

distributed feedback (DFB) and Fabry Perot (FP)

lasers. A standard SPI port is provided for programming integrated

digital-to-analog converters for laser bias current, modulation

current, average power, and the limiting amplifier loss of signal

threshold. The VSC7965 is equipped with SFP-compliant fault

indicators, redundant disable control, Automatic Power Control,

temperature sensor, various signal monitors, and robust eye safety

features. The VSC7965 is available in a 5mm x 5mm 32-pin QFN

plastic package.