1

SY88822V

Micrel

DESCRIPTION

s Single 3.3V or 5V power supply

s Up to 155Mbps operation

s Modulation current to 30mA

s PECL output enable

s Differential PECL inputs

s Available in a tiny 10-pin (3mm) MSOP

FEATURES

5V/3.3V 155Mbps

LASER DIODE DRIVER

WITH OUTPUT ENABLE

SY88822V

APPLICATIONS

s 155Mbps SONET

Rev.: A

Amendment: /0

Issue Date:

March 2003

The SY88822V is a high speed current switch for driving

a semiconductor laser diode in optical transmission

applications. The modulation current (I

the current (I

output OUT is HIGH and no current flows through OUT

when output enable is HIGH.

The device incorporates complementary open collector

outputs with a 30mA maximum current driving capability.

The external resistor R

and V

recommended to compensate for laser diode matching

issues. Pin 9 and pin 10 should be connected to achieve

better performance.

The SY88822V utilizes the high performance bipolar

ASSET™ technology.

ASSET is a trademark of Micrel, Inc.

FUNCTIONAL BLOCK DIAGRAM

/EN

/DIN

DIN

Internal

Logic

GND

40X

/OUT

GND

to Laser Diode

OUT