MAX3645 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX3645

+2.97V to +5.5V, 125Mbps to 200Mbps Limiting Amplifier with Loss-of-Signal Detector

Maxim Integrated 

19-3026; Rev 1; 11/04

+2.97V to +5.5V, 125Mbps to 200Mbps Limiting

Amplifier with Loss-of-Signal Detector

General Description

The MAX3645 limiting amplifier functions as a data

quantizer and is pin compatible with the Mindspeed

MC2045-2 and MC2045-2Y postamplifiers. The amplifi-

er accepts a wide range of input voltages and provides

constant-level positive emitter-coupled logic (PECL)

output voltages with controlled edge speeds.

The MAX3645 features an integrated power detector

with complementary PECL loss-of-signal (LOS) outputs

that indicate when the input power level drops below a

programmable threshold. An optional squelch function

holds the data outputs at static levels during a

LOS condition.

The MAX3645 operates from a single +3.3V or +5.0V

power supply over a -40°C to +85°C temperature

range. It is available in 16-pin SO and 16-pin QSOP

packages.

Applications

SONET 155Mbps Transceivers

Fast Ethernet Receivers

FDDI 125Mbps Receivers

FTTx Receivers

ESCON Receivers

Features

♦ Pin Compatible with the Mindspeed

MC2045-2/MC2045-2Y

♦ 500µV Input Sensitivity (BER = 10-12)

♦ Compatible with 4B/5B Data Coding

♦ Programmable LOS Threshold

♦ Stable LOS Threshold Over Supply Range

♦ Output Disable Function and Automatic Squelch

♦ Single +3.3V or +5.0V Power Supply

♦ 18mA Supply Current

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX3645ESE

-40°C to +85°C 16 SO

MAX3645EEE

-40°C to +85°C 16 QSOP

MAX3645EEE+

-40°C to +85°C 16 QSOP

+Denotes lead-free package.

Pin Configuration

TOP VIEW

CAZ2 1

CAZ1 2

GNDA 3

DIN+ 4

DIN- 5

VCCA 6

CSD 7

DIS 8

MAX3645

16 TH

15 N.C.

14 VCCE

13 DOUT+

12 DOUT-

11 GNDE

10 LOS

9 LOS

SO/QSOP

Typical Application Circuit

VCC

VCC

PIN K

MAX3644*

IN

GND

*FUTURE PRODUCT

OUT+

OUT-

0.1µF

0.1µF

VCC

CAZ

VCC

0.1µF

CSD

1nF

CSD VCCA CAZ1 CAZ2 VCCE

N.C.

DIN+

DOUT+

MAX3645

DIN-

GNDA TH DIS LOS

DOUT-

LOS

GNDE

RTH

100Ω

50Ω

VCC - 2V

50Ω

50Ω

50Ω

VCC - 2V

________________________________________________________________ Maxim Integrated Products 1

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.

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