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March 2004

s

HIGH SPEED:

s

LOW POWER DISSIPATION:

s

HIGH NOISE IMMUNITY:

s

SYMMETRICAL OUTPUT IMPEDANCE:

s

BALANCED PROPAGATION DELAYS:

s

WIDE OPERATING VOLTAGE RANGE:

s

PIN AND FUNCTION COMPATIBLE WITH

54 SERIES 161

s

SPACE GRADE-1: ESA SCC QUALIFIED

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50 krad QUALIFIED, 100 krad AVAILABLE ON

REQUEST

s

NO SEL UNDER HIGH LET HEAVY IONS

IRRADIATION

s

DEVICE FULLY COMPLIANT WITH

SCC-9204-059

DESCRIPTION

The

M54HC161

is

an

high

speed

CMOS

SYNCHRONOUS 4-BIT BINARY PRESETTABLE

technology.

The CLOCK input is active on the rising edge.

Both LOAD and CLEAR inputs are active LOW.

Presetting is synchronous on the rising edge of

the clock, the function is cleared asynchronously.

Two enable inputs (TE and PE) and CARRY

output are provided to enable easy cascading of

counters, which facilities easy implementation of

N-bit counters without using external gates.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

M54HC161

RAD-HARD SYNCHRONOUS

PRESETTABLE 4-BIT COUNTER

PIN CONNECTION

ORDER CODES

PACKAGE

FM

EM

DILC

M54HC161D

M54HC161D1

FPC

M54HC161K

M54HC161K1

DILC-16

FPC-16