M54HC298 Datasheet, PDF (1/11 Pages) STMicroelectronics – QUAD 2 CHANNEL MULTIPLEXER/REGISTER

M54HC298
M74HC298
QUAD 2 CHANNEL MULTIPLEXER/REGISTER
. HIGH SPEED
fMAX = 73 MHz (typ.) AT VCC = 5 V
. LOW POWER DISSIPATION
I_CC = 4 µA (MAX.) AT T_A = 25 °C
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
I_OH = IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
t_PLH = t_PHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS298
DESCRIPTION
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M 54HC 29 8F 1R
M 74H C2 98 M1 R
M 74HC 29 8B 1R
M 74H C2 98 C1 R
The M54/74HC298 is a high speed CMOS QUAD 2-
CHANNEL MULTIPLEXER/REGISTER fabricated
in silicon gate C²MOS technology.
PIN CONNECTIONS (top view)
It has the same high speed performance of LSTTL
combined with true CMOS low power consumption.
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 nega-
tive edge of the clock pulse. All inputs are equipped
with protection circuits against static discharge and
transient excess voltage.
INPUT AND OUTPUT EQUIVALENT CIRCUIT
October 1992
NC =
No Internal
Connection
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