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74AC157 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. 74AC157
Description  QUAD 2 CHANNEL MULTIPLEXER
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74AC157 Datasheet(HTML) 1 Page - STMicroelectronics

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74AC157
QUAD 2 CHANNEL MULTIPLEXER
PRELIMINARY DATA
May 1997
s
HIGH SPEED: tPD = 4 ns (TYP.) at VCC =5V
s
LOW POWER DISSIPATION:
ICC =8
µA (MAX.) at TA =25 oC
s
HIGH NOISE IMMUNITY:
VNIH =VNIL = 28% VCC (MIN.)
s
50
Ω TRANSMISSION LINE DRIVING
CAPABILITY
s
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH|= IOL =24 mA (MIN)
s
BALANCED PROPAGATION DELAYS:
tPLH
≅ tPHL
s
OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 157
s
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The AC157 is an high-speed CMOS QUAD
2-CHANNEL
MULTIPLEXER
fabricated
with
sub-micron silicon gate and double-layer metal
wiring C
2MOS technology. It is ideal for low
power
applications
maintaining
high
speed
operation similar to equivalent Bipolar Schottky
TTL.
It consists of four 2-input digital multiplexers with
common select and strobe inputs. It is a
non-inverting multiplexer. When the STROBE
input is held high selection of data is inhibit and
all the outputs become low. The SELECT
decoding determines whether the A or B inputs
get routed to their corresponding Y outputs.
All
inputs and
outputs
are
equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
M
(Micro Package)
B
(Plastic Package)
ORDER CODES :
74AC157B
74AC157M
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