2.125Gbps, 3.3V

Quad-Port Bypass with Repeater

________________________________________________________________ Maxim Integrated Products

1

19-1701; Rev 2; 2/01

General Description

The MAX3752 quad-port bypass IC is designed for use

in the Fibre Channel Arbitrated Loop topology. This

device consists of four serially connected port bypass

circuits (PBCs) and a repeater that provides clock and

data recovery (CDR).

The quad-port bypass circuit allows connection of up to

four Fibre Channel L-Ports, which can each be enabled

or bypassed by controlling the PBC select inputs.

Additional quad PBCs can be cascaded for applica-

tions requiring more than four L-Ports. To reduce the

external parts count, all signal inputs and outputs have

internal termination resistors.

The MAX3752 complies with Fibre Channel jitter toler-

ance requirements and can recover data signals with up

to 0.7 unit intervals (UIs) of high-frequency jitter. When

the repeater is not needed, it can be disabled to reduce

power consumption. A fully integrated phase-locked loop

(PLL) provides a frequency lock indication and does not

need an external reference clock.

________________________Applications

2.125Gbps Fibre Channel

Fibre Channel Data Storage Systems

Storage Area Networks

Fibre Channel Hubs

Features

o Four High-Speed Data Ports

o Meets Fibre Channel Jitter Tolerance

Requirements

o Large Output Signal Swing (>1000mVp-p)

o +3.0V to +3.6V Single-Supply Voltage

o On-Chip Termination Resistors Compatible with

75

Ω Transmission Lines at All Ports

GND

LOUT4+

LOUT4-

GND

LIN4+

LIN4-

GND

GND

OUT-

OUT+

GND

LOCK

GND

LIN1-

LIN1+

GND

LOUT1-

LOUT1+

GND

GND

IN-

IN+

GND

CLKEN

1

2

3

4

5

6

7

8

9

10

11

12

36

35

34

33

32

31

30

29

28

27

26

25

TQFP-EP*

MAX3752

Pin Configuration

PART

TEMP. RANGE

PIN-PACKAGE

MAX3752CCM

0°C to +70

°C

48 TQFP-EP*

Ordering Information

Typical Operating Circuit appears at end of data sheet.

*EP = Exposed pad

* Exposed pad is connected to ground.

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.