SPT9689

DUAL ULTRAFAST VOLTAGE COMPARATOR

TECHNICAL DATA

FEBRUARY 20, 2001

FEATURES

• 650 ps propagation delay

• 100 ps propagation delay variation

• 70 dB CMRR

• Low feedthrough and crosstalk

• Differential latch control

• ECL compatible

APPLICATIONS

• Automated test equipment

• High-speed instrumentation

• Window comparators

• High-speed timing

• Line receivers

• High-speed triggers

• Threshold detection

• Peak detection

GENERAL DESCRIPTION

The SPT9689 is a

Subnanosecond monolithic dual com-

parator. The propagation delay variation is less than

100 ps from 5 to 50 mV input overdrive voltage. The input

slew rate is 10 V/ns. The device utilizes a high precision

differential input stage with a common-mode range of

–2.5 V to +4.0 V.

ECL-compatible complementary digital outputs are ca-

pable of driving 50

Ω terminated transmission lines and

providing 30 mA output drive. The SPT9689 is pin compat-

ible with the SPT9687. It is available in 20-lead PLCC and

20-contact LCC packages over the industrial temperature

range. The SPT9689 is also available in die form.

BLOCK DIAGRAM

A

–+

INVERTING

INPUT

LATCH ENABLE

LATCH ENABLE

Q OUTPUT

Q OUTPUT

INVERTING

INPUT

NONINVERTING

INPUT

LATCH ENABLE

LATCH ENABLE

Q OUTPUT

Q OUTPUT

NONINVERTING

INPUT

–

+

B