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PDF 74HC157 Data sheet ( Hoja de datos )
| Número de pieza | 74HC157 | |
| Descripción | HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER INV. | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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 1. - Quad Multiplexer - Fairchild  Hay una vista previa y un enlace de descarga de 74HC157 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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M54HCT157/158
M74HCT157/158
HCT157 QUAD 2 CHANNEL MULTIPLEXER
HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV.)
. HIGH SPEED
tPD = 21 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT TA = 25 °C
. COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS157/158
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCTXXXF1R M74HCTXXXM1R
M74HCTXXXB1R M74HCTXXXC1R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HCT157 and the M54/74HCT158 are
high speed CMOS QUAD 2-CHANNEL MULTI-
PLEXERs fabricated with silicon gate C2MOS 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
HCT158 is an inverting multiplexer while the
HCT157 is a non-inverting multiplexer. When the
STROBE input is held High, selection of data is in-
hibited and all the outputs become Low in the
M74HCT157 and High in the M74HCT158. The SE-
LECT decoding determines whether the A or B in-
puts get routed to their corresponding Y outputs. All
inputs are equipped with protection circuits against
static discharge and transient excess voltage.
M54/74HCT devices are designed to directly inter-
face HSC2MOS systems with TTL and NMOS com-
ponents. They are also plug in replacements for
LSTTL devices giving a reduction of power con-
sumption.
April 1993
HCT157
HCT158
NC =
No Internal
Connection
1/11
1 page  
M54/M74HCT157 M54/M74HCT158
DC SPECIFICATIONS
Symbol
Parameter
VIH High Level Input
Voltage
VIL Low Level Input
Voltage
VOH High Level
Output Voltage
VOL Low Level Output
Voltage
II Input Leakage
Current
ICC Quiescent Supply
Current
∆ICC Additional worst
case supply
current
Test Conditions
VCC
(V)
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
Value
-40 to 85 oC
74HC
Min. Max.
-55 to 125 oC
54HC
Min. Max.
4.5 2.0 2.0 2.0
to
5.5
4.5 0.8 0.8 0.8
to
5.5
VI = IO=-20 µA 4.4
4.5
VIH
or IO=-4.0 mA 4.18
VIL
4.5
4.31
4.4
4.13
4.4
4.10
VI = IO= 20 µA
4.5
VIH
or IO= 4.0 mA
VIL
0.0 0.1
0.17 0.26
0.1
0.33
0.1
0.4
5.5 VI = VCC or GND
±0.1 ±1
±1
5.5 VI = VCC or GND
4 40 80
5.5 Per Input pin
VI = 0.5V or
VI = 2.4V
Other Inputs at
VCC or GND
IO= 0
2.0 2.9 3.0
Unit
V
V
V
V
µA
µA
mA
5/11
5 Page 
M54/M74HCT157 M54/M74HCT158
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
© 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet 74HC157.PDF ] | |
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