M54HC251 Datasheet, PDF (1/11 Pages) STMicroelectronics – 8 BIT SIPO SHIFT REGISTER

M54HC251
M74HC251
. HIGH SPEED
tPD = 14 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
I_CC = 4 µA (MAX.) AT T_A = 25 °C 6 V
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH = 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
54/74LS251
DESCRIPTION
The M54/74HC251 is a high speed CMOS 8-CHAN-
NEL MULTIPLEXER (3-STATE) fabricated in silicon
gate C²MOS technology. It has the same high
speed performance of LSTTL combined with true
CMOS low power consumption. This multiplexer
features both true (Y) and complement (W) outputs
as well as STROBE input. The STROBE must be a
low logic level to enable this device. When the
STROBE input is high, both outputs are in the high
impedance state. When enabled, address informa-
tion 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.
8 BIT SIPO SHIFT REGISTER
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M 54HC 25 1F 1R
M 74H C2 51 M1 R
M 74HC 25 1B 1R
M 74H C2 51 C1 R
PIN CONNECTIONS (top view)
INPUT AND OUTPUT EQUIVALENT CIRCUIT
February 1993
NC =
No Internal
Connection
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