General Description

The MAX9176/MAX9177 are 670MHz, low-jitter, low-

skew 2:1 multiplexers ideal for protection switching,

loopback, and clock distribution. The devices feature

ultra-low 68ps peak-to-peak deterministic jitter that

ensures reliable operation in high-speed links that are

highly sensitive to timing errors.

The MAX9176 has fail-safe LVDS inputs and an LVDS

output. The MAX9177 has “anything” differential inputs

(CML/LVDS/LVPECL) and an LVDS output. The output

can be put into high impedance using the power-down

input. The MAX9176 features fail-safe circuits that drive

the output high when a selected input is open, undriven

and shorted, or undriven and terminated. The MAX9177

has bias circuits that force the output high when a

selected input is open. The mux select and power-

down inputs are compatible with standard LVTTL/

LVCMOS logic.

The select and power-down inputs tolerate undershoot

MAX9177 are available in 10-pin µMAX and 10-lead

thin QFN packages, and operate from a single 3.3V

supply over the -40°C to +85°C temperature range.

Applications

Protection Switching

Loopback

Clock Distribution

Features

o 3.3V Supply

o LVDS Fail-Safe Inputs (MAX9176)

o Anything Inputs (MAX9177) Accept

CML/LVDS/LVPECL

o Select and Power-Down Inputs Tolerate -1.0V

o Low-Power CMOS Design

o 10-Lead µMAX and QFN Packages

o -40°C to +85°C Operating Temperature Range

o Conform to ANSI TIA/EIA-644 LVDS Standard

o IEC61000-4-2 Level 4 ESD Rating

670MHz LVDS-to-LVDS and

Anything-to-LVDS 2:1 Multiplexers

________________________________________________________________ Maxim Integrated Products

1

1

2

3

4

5

10

9

8

7

6

OUT+

OUT-

PD

IN1+

GND

INO-

IN0+

MAX9176

TOP VIEW

SEL

IN1-

1

2

3

4

5

10

9

8

7

6

OUT+

OUT-

PD

IN1+

GND

INO-

EXPOSED

PAD

IN0+

QFN

(LEADS UNDER PACKAGE)

SEL

IN1-

PART

TEMP RANGE

PIN-PACKAGE

MAX9176EUB

-40

°C to +85°C

10 µMAX

MAX9176ETB*

-40

°C to +85°C

10 Thin QFN-EP**

MAX9177EUB

-40

°C to +85°C

10 µMAX

MAX9177ETB*

-40

°C to +85°C

10 Thin QFN-EP**

Pin Configurations

Ordering Information

19-2757; Rev 0; 1/03

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.

Functional Diagram appears at end of data sheet.

*Future product—contact factory for availability.

**EP = Exposed paddle.