General Description

The MAX9424–MAX9427 high-speed, low-skew quad

PECL-to-ECL translators are designed for high-speed

data and clock driver applications. These devices feature

channel skew is less than 90ps in asynchronous mode.

The four channels can be operated synchronously with

an external clock, or in asynchronous mode determined

by the state of the SEL input. An enable input provides

the ability to force all the outputs to a differential low state.

The parts differ from one another by their input and out-

put termination options. The input options are an open

input or an internal differential 100

Ω termination. The

output options are an open-emitter output or a series

50

Ω termination. See Ordering Information.

The MAX9424–MAX9427 operate from a positive voltage

supply of +2.375V to +5.5V, and a negative supply volt-

age of -2.375V to -5.5V and operate across the extended

temperature range of -40°C to +85°C. They are offered in

32-pin 5mm x 5mm TQFP and space-saving 5mm x 5mm

QFN packages.

Applications

Data and Clock Driver and Buffer

Central Office Backplane Clock Distribution

DSLAM Backplane

Base Station

ATE

Features

o 0.24ps RMS Added Random Jitter

o 10ps Channel-to-Channel Skew in Synchronous

Mode

o Guaranteed 500mV Differential Output at 3GHz

Clock Frequency

o 420ps Propagation Delay in Asynchronous Mode

o Functionally Compatible with

SK4426 (MAX9424)

SK4430 (MAX9425)

SK4436 (MAX9426)

SK4440 (MAX9427)

o Integrated 50Ω Outputs (MAX9425/MAX9427)

o Integrated 100Ω Inputs (MAX9426/MAX9427)

o Synchronous/Asynchronous Operation

Lowest Jitter Quad PECL-to-ECL

Differential Translators

________________________________________________________________ Maxim Integrated Products

1

MAX9424

MAX9425

MAX9426

MAX9427

TQFP (5mm x 5mm)

TOP VIEW

32

28

29

30

31

25

26

27

10

13

15

14

16

11

12

9

17

18

19

20

21

22

23 OUT1

OUT1

OUT2

OUT2

2

3

4

5

6

7

8

EN

CLK

SEL

1

SEL

CLK

EN

17

18

19

20

21

22

23

OUT2

OUT2

OUT1

OUT1

8

7

6

5

4

3

2

EN

EN

CLK

CLK

SEL

SEL

MAX9424

MAX9425

MAX9426

MAX9427

QFN

1

24

TOP VIEW

*

*

*

*

Pin Configurations

Ordering Information

19-2390; Rev 0; 4/02

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.

*Future product—contact factory for availability.

PART

TEMP

RANGE

PIN-

PACKAGE

INPUT

(IN_,

IN_)

OUTPUT

(OUT_,

OUT_)

MAX9424EHJ -40°C to +85°C 32 TQFP

Open

Open

MAX9424EGJ* -40°C to +85°C 32 QFN

Open

Open

MAX9425EHJ -40°C to +85°C 32 TQFP

Open

50

Ω

MAX9425EGJ* -40°C to +85°C 32 QFN

Open

50

Ω

MAX9426EHJ -40°C to +85°C 32 TQFP

100

Ω

Open

MAX9426EGJ* -40°C to +85°C 32 QFN

100

Ω

Open

MAX9427EHJ -40°C to +85°C 32 TQFP

100

Ω

50

Ω

MAX9427EGJ* -40°C to +85°C 32 QFN

100

Ω

50

Ω