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M54HC257D

RAD-HARD QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

STMicroelectronics 

M54HC257

RAD-HARD QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

s HIGH SPEED:

tPD = 11 ns (TYP.) at VCC = 6V

s LOW POWER DISSIPATION:

ICC = 4µA(MAX.) at TA = 25°C

s HIGH NOISE IMMUNITY:

VNIH = VNIL = 28% VCC (MIN.)

s SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 6mA (MIN)

s BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s WIDE OPERATING VOLTAGE RANGE:

VCC (OPR) = 2V to 6V

s PIN AND FUNCTION COMPATIBLE WITH

54 SERIES 257

s SPACE GRADE-1: ESA SCC QUALIFIED

s 50 krad QUALIFIED, 100 krad AVAILABLE ON

REQUEST

s NO SEL UNDER HIGH LET HEAVY IONS

IRRADIATION

s DEVICE FULLY COMPLIANT WITH

SCC-9408-047

DESCRIPTION

The M54HC257 is an high speed CMOS QUAD 2

CHANNEL MULTIPLEXER (3-STATE) fabricated

with silicon gate C2MOS technology.

DILC-16

FPC-16

ORDER CODES

PACKAGE

FM

DILC

FPC

M54HC257D

M54HC257K

EM

M54HC257D1

M54HC257K1

This IC is composed of an independent 2-channel

multiplexer with common SELECT and ENABLE

(OE) input.

The M74HC257 is a non-inverting multiplexer.

When the ENABLE input is held "High", outputs of

the IC become in a High-Impedance state. If

SELECT input is held low, "A" data is selected,

when SELECT is high, "B" data is chosen.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

PIN CONNECTION

April 2004

1/10

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