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M54HC157 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. M54HC157
Description  HC158 QUAD 2 CHANNEL MULTIPLEXER INV. HC157 QUAD 2 CHANNEL MULTIPLEXER
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M54HC157 Datasheet(HTML) 1 Page - STMicroelectronics

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M54HC157/158
M74HC157/158
February 1993
HC158 QUAD 2 CHANNEL MULTIPLEXER (INV.)
HC157 QUAD 2 CHANNEL MULTIPLEXER
B1R
(Plastic Package)
ORDER CODES :
M54HCXXXF1R
M74HCXXXM1R
M74HCXXXB1R
M74HCXXXC1R
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
PIN CONNECTIONS (top view)
NC =
No Internal
Connection
HC158
HC157
DESCRIPTION
.
HIGH SPEED
tPD = 10 ns (TYP.) AT VCC =5 V
.
LOW POWER DISSIPATION
ICC =4
µA (MAX.) AT TA =25 °C
.
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
tPLH =tPHL
.
WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
.
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS157/158
The M54/74HC157 and the M54/74HC158 are high
speed
CMOS
QUAD
2-CHANNEL
MULTI-
PLEXER’s fabricated with silicon gate C
2MOS tech-
nology. They achieve the high speed operation
similar to equivalent LSTTL while maintaining the
CMOS low power dissipation.
These devices consist of four 2-input digital multi-
plexers with common select and strobe inputs. The
HC158 is an inverting multiplexer while the HC157
is a non-inverting multiplexer. When the STROBE
input is held High, selection of data is inhibited and
all the outputs become Low in the M74HC157 and
High in the M74HC158. The SELECT decoding
determines whether the A or B inputs get routed to
their corresponding Y outputs. All inputs are
equipped with protection circuits against static dis-
charge and transient excess voltage.
1/11


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