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M74HC251

8-CHANNEL MULTIPLEXER (3-STATE)

STMicroelectronics 

M74HC251

8-CHANNEL MULTIPLEXER (3-STATE)

s HIGH SPEED :

tPD = 17 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 = 4mA (MIN)

s BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s WIDE OPERATING VOLTAGE RANGE:

VCC (OPR) = 2V to 6V

s PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 251

DESCRIPTION

The M74HC251 is an high speed CMOS

8-CHANNEL MULTIPLEXER (3-STATE)

fabricated with silicon gate C2MOS technology.

This Multiplexer features both true (Y) and

complement (W) outputs as well as STROBE

input. When the STROBE is high, both outputs are

DIP

SOP

TSSOP

ORDER CODES

PACKAGE

TUBE

DIP

SOP

TSSOP

M74HC251B1R

M74HC251M1R

T&R

M74HC251RM13TR

M74HC251TTR

in the high impedance state. When enabled,

address information on the data select inputs

determines which data input is routed to Y and W.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

July 2001

1/11

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