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M74HCTXXXB1R

更新时间： 2024-11-08 22:10:47
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 复用器
页数 文件大小 规格书
11页 252K
描述
HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV)

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M74HCTXXXB1R 数据手册

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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  
B1R  
(Plastic Package)  
F1R  
(Ceramic Package)  
M1R  
(Micro Package)  
C1R  
(Chip Carrier)  
WITH 54/74LS157/158  
ORDER CODES :  
M54HCTXXXF1R  
M74HCTXXXB1R  
M74HCTXXXM1R  
M74HCTXXXC1R  
PIN CONNECTIONS (top view)  
HCT157  
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 theM74HCT158. 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.  
HCT158  
NC =  
No Internal  
Connection  
April 1993  
1/11  
1234567...11

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