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March 2004

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HIGH SPEED:

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LOW POWER DISSIPATION:

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HIGH NOISE IMMUNITY:

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SYMMETRICAL OUTPUT IMPEDANCE:

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BALANCED PROPAGATION DELAYS:

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WIDE OPERATING VOLTAGE RANGE:

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PIN AND FUNCTION COMPATIBLE WITH

54 SERIES 166

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SPACE GRADE-1: ESA SCC QUALIFIED

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50 krad QUALIFIED, 100 krad AVAILABLE ON

REQUEST

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NO SEL UNDER HIGH LET HEAVY IONS

IRRADIATION

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DEVICE FULLY COMPLIANT WITH

SCC-9306-043

DESCRIPTION

The M54HC166 is an high speed CMOS 8 BIT

PISO SHIFT REGISTER fabricated with silicon

It consists of parallel or serial inputs and a

serial-out 8 bit shift register with gated clock inputs

and an overriding clear input. The parallel-in or

serial-in modes are controlled by the SHIFT/LOAD

input. When the SHIFT/LOAD input is held high,

the serial data input is enabled and the eight

flip-flops perform serial shifting with each clock

pulse; when held low, the parallel data inputs are

enabled and synchronous loading occurs on the

next clock pulse. Clocking is accomplished on the

low-to-high level edge of the clock pulse. The

CLOCK-INHIBIT input should be changed to the

high only while the clock input is held high. A direct

clear input overrides all other inputs, including the

clock, and sets all flip-flops to zero. Functional

details are shown in the truth table and the timing

chart. All inputs are equipped with protection

circuits against static discharge and transient

excess voltage.

M54HC166

RAD-HARD 8 BIT PISO SHIFT REGISTER

PIN CONNECTION

ORDER CODES

PACKAGE

FM

EM

DILC

M54HC166D

M54HC166D1

FPC

M54HC166K

M54HC166K1

DILC-16

FPC-16