1/11

July 2001

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

74 SERIES 298

DESCRIPTION

The M74HC298 is an high speed CMOS QUAD 2

CHANNEL MULTIPLEXER/REGISTER fabricated

These circuits are controlled by the signals WORD

SELECT and CLOCK. When the WORD SELECT

input is taken low Word 1 (A1, B1, C1 and D1) is

presented to the input of the flip-flops, and when

WORD SELECT is high Word 2 (A2, B2, C2 and

D2) is presented to the inputs of the flip-flops. The

select word is clocked to the output terminals on

the negative edge of the clock pulse.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

M74HC298

QUAD 2 CHANNEL MULTIPLEXER/REGISTER

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE

TUBE

T & R

DIP

M74HC298B1R

SOP

M74HC298M1R

M74HC298RM13TR

TSSOP

M74HC298TTR

TSSOP

DIP

SOP