High Speed, 10 GHz Window Comparator

Data Sheet

HMC974LC3C

Rev. E

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FEATURES

Propagation delay: 88 ps

Propagation delay at 50 mV overdrive: 20 ps

Minimum detectable pulse width: 60 ps

Differential latch control

Power dissipation: 240 mW

16-terminal 2.9 mm × 2.9 mm LCC package

APPLICATIONS

Automatic test equipment (ATE)

High speed instrumentation

Clock and data restoration

Semiconductor test systems

Threshold detection in electronic warfare systems

FUNCTIONAL BLOCK DIAGRAM

1

RT

2

WIN

3

WIT

4

RB

ORB

12

WOUTB

11

URB

10

9

PACKAGE

BASE

HMC974LC3C

Figure 1.

GENERAL DESCRIPTION

The HMC974LC3C is a silicon germanium (SiGe) monolithic,

ultra fast window comparator that features reduced swing

positive emitter-coupled logic (RSPECL) output drivers that are

level latched. Three output ports detect whether an analog input

signal is above, below, or between two reference levels supplied

at the input (see Figure 2).

The outputs are single-ended negative logic. Incorporating two

proven comparators at the input provides good dc and dynamic

matching and reduces the input capacitance. The reduced swing

output stages are designed to directly drive 400 mV into 50 Ω

The HMC974LC3C features high speed latches that can either

be enabled to latch the output data or left in the track mode to

implement a tracking window comparator.