CAZ1

CAZ2

0.01

µF

0.01

µF

0.01

µF

0.01

µF

TH

SQUELCH

N.C.

100

Ω

IN-

IN+

OUT+

100

Ω

OUT-

MAX3266

MAX3267

MAX3264CUE

MAX3265CUE

MAX3265EUE

LOS

LOSS

OF

SIGNAL

LOS

N.C.

LEVEL

N.C.

General Description

The 1.25Gbps MAX3264/MAX3268/MAX3768 and the

2.5Gbps MAX3265/MAX3269/MAX3765 limiting ampli-

fiers are designed for Gigabit Ethernet and Fibre

Channel optical receiver systems. The amplifiers accept

a wide range of input voltages and provide constant-

level output voltages with controlled edge speeds.

Additional features include RMS power detectors with

programmable loss-of-signal (LOS) indication, an

optional squelch function that mutes the data output sig-

nal when the input voltage falls below a programmable

threshold, and excellent jitter performance.

The MAX3264/MAX3265/MAX3765 feature current-mode

logic (CML) data outputs that are tolerant of inductive

connectors and a 16-pin TSSOP package, making these

circuits ideal for GBIC receivers. The MAX3268/

MAX3269/MAX3768 feature standards-compliant posi-

tive-referenced emitter-coupled logic (PECL) data out-

puts and are available in a tiny 10-pin µMAX package

that is ideal for small-form-factor (SFF) receivers.

Applications

Gigabit Ethernet Optical Receivers

Fibre Channel Optical Receivers

System Interconnect

ATM Optical Receivers

Features

♦ +3.0V to +5.5V Supply Voltage

♦ Low Deterministic Jitter

14ps (MAX3264)

11ps (MAX3265/MAX3765)

♦ 150ps (max) Edge Speed (MAX3265/MAX3765)

300ps (max) Edge Speed (MAX3264)

♦ Programmable Signal-Detect Function

♦ Choice of CML or PECL Output Interface

♦ 10-Pin µMAX or 16-Pin TSSOP Package

+3.0V to +5.5V, 1.25Gbps/2.5Gbps

Limiting Amplifiers

________________________________________________________________ Maxim Integrated Products

1

19-1523; Rev 6, 5/04

+Denotes lead-free package.

*EP = Exposed paddle.

**Dice are designed to operate from 0°C to +70°C, but are tested

Ordering Information

Selector Guide appears at end of data sheet.

Pin Configurations appear at end of data sheet.

Typical Operating Circuits

Typical Operating Circuits continued at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP RANGE

PIN-PACKAGE

MAX3264CUE

0

°C to +70°C

16 TSSOP-EP*

MAX3264CUE+

0

°C to +70°C

16 TSSOP-EP*

MAX3264C/D

0

°C to +70°C

Dice**

MAX3265CUE

0

°C to +70°C

16 TSSOP-EP*

MAX3265CUE+

0

°C to +70°C

16 TSSOP-EP*

MAX3265CUB

0

°C to +70°C

10 µMAX-EP*

MAX3265CUB+

0

°C to +70°C

10 µMAX-EP*

MAX3265EUE

-40

°C to +85°C

16 TSSOP-EP*

MAX3265EUE+

-40

°C to +85°C

16 TSSOP-EP*

MAX3265C/D

0

°C to +70°C

Dice**

Ordering Information continued at end of data sheet.