________________General Description

The MAX3263 is a complete, easy-to-program, single

+5V-powered, 155Mbps laser diode driver with com-

plementary enable inputs and automatic power control

(APC). The MAX3263 accepts differential PECL inputs

and provides complementary output currents. A tem-

perature-stabilized reference voltage is provided to

simplify laser current programming. This allows modu-

lation current to be programmed up to 30mA and bias

current to be programmed from up to 60mA with two

external resistors.

An APC circuit is provided to maintain constant laser

power in transmitters that use a monitor photodiode.

Only two external resistors are required to implement

the APC function.

The MAX3263’s fully integrated feature set includes a

TTL-compatible laser failure indicator and a program-

mable slow-start circuit to prevent laser damage. The

slow-start is preset to 50ns and can be extended by

adding an external capacitor.

________________________Applications

Laser Diode Transmitters

155Mbps SDH/SONET

155Mbps ATM

____________________________Features

o Rise Times Less than 1ns

o Differential PECL Inputs

o Single +5V Supply

o Automatic Power Control

o Temperature-Compensated Reference Voltage

o Complementary Enable Inputs

_______________Ordering Information

Single +5V, Fully Integrated,

155Mbps Laser Diode Driver

________________________________________________________________

Maxim Integrated Products

1

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

SLWSTRT

IPIN

VCCA

GNDA

OUT+

GNDA

OUT-

GNDA

IBIASOUT

IMODSET

IBIASSET

IBIASFB

VREF2

IPINSET

FAILOUT

GNDB

VIN+

VIN-

GNDB

VCCB

ENB-

ENB+

VREF1

OSADJ

TOP VIEW

16

15

14

13

9

10

11

12

SSOP

MAX3263

___________________Pin Configuration

19-0432; Rev 1b; 4/98

PART

MAX3263CAG

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

24 SSOP

MAX3263

+5V

0.01

µF

0.01

µF

+5V

+5V

+5V

OUT+

IBIASOUT

IPIN

PECL

INPUTS

OUT-

FAILOUT

IBIASFB

OSADJ

IMODSET

IPINSET

IBIASSET

VCCA VCCB

VIN+

VIN-

ENB+

GNDB

GNDA

ENB-

SLWSTRT

VREF1

VREF2

LASER

2.7k

PHOTO-

DIODE

FERRITE BEAD

_____________Typical Operating Circuit

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.