_______________General Description

The MAX9685 is an ultra-fast ECL comparator manufac-

capable of very short propagation delays. This design

maintains the excellent DC matching characteristics nor-

mally found only in slower comparators.

The device is pin-compatible with the AD9685 and

Am6685, but exceeds their AC characteristics.

The MAX9685 has differential inputs and complemen-

tary outputs that are fully compatible with ECL-logic lev-

els. Output current levels are capable of driving 50

Ω

terminated transmission lines. The ultra-fast operation

makes signal processing possible at frequencies in

excess of 600MHz.

A latch-enable (LE) function is provided to allow the

comparator to be used in a sample-hold mode. When

LE is ECL high, the comparator functions normally.

When LE is driven ECL low, the outputs are forced to an

unambiguous ECL-logic state, dependent on the input

conditions at the time of the latch input transition. If the

latch-enable function is not used, the LE pin must be

connected to ground.

________________________Applications

High-Speed A/D Converters

High-Speed Line Receivers

Peak Detectors

Threshold Detectors

High-Speed Triggers

____________________________Features

o 1.3ns Propagation Delay

o 0.5ns Latch Setup Time

o +5V, -5.2V Power Supplies

o Pin-Compatible with AD9685, Am6685

o Available in Commercial, Extended-Industrial,

and Military Temperature Ranges

o Available in Narrow SO Package

______________Ordering Information

* Contact factory for availability of 20-pin PLCC.

** Contact factory for dice specifications.

Ultra-Fast ECL-Output Comparator

with Latch Enable

________________________________________________________________

Maxim Integrated Products

1

TOP VIEW

MAX9685

9

8

7

6

5

4

3

2

V+

GND1

1

IN+

IN-

LE

V-

N.C.

Q OUT

Q OUT

GND2

10

TO-100

DIP/SO

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

GND2

N.C.

N.C.

N.C.

Q OUT

Q OUT

N.C.

N.C.

GND1

V+

IN+

IN-

N.C.

LE

N.C.

V-

__________________________________________________________Pin Configurations

Call toll free 1-800-998-8800 for free samples or literature.

19-2398; Rev 1; 7/93

PART

TEMP. RANGE

PIN-PACKAGE*

MAX9685CPE

0°C to +70°C

16 Plastic DIP

MAX9685CSE

0°C to +70°C

16 Narrow SO

MAX9685CJE

0°C to +70°C

16 CERDIP

MAX9685CTW

0°C to +70°C

10 TO-100

MAX9685C/D

0°C to +70°C

Dice**

MAX9685EPE

-40°C to +85°C

16 Plastic DIP

MAX9685ESE

-40°C to +85°C

16 Narrow SO

MAX9685MJE

-55°C to +125°C

16 CERDIP

MAX9685MTW

-55°C to +125°C

10 TO-100