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参数资料
| 型号： | 74AHCT157 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | Quad 2-input multiplexer(四通道 2输入多路复用器) |
| 中文描述： | 四2输入复用器（四通道2输入多路复用器） |
| 文件页数： | 2/16页 |
| 文件大小： | 84K |
| 代理商： | 74AHCT157 |
1999 Sep 24
2
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74AHC157;
74AHCT157
FEATURES
ESD protection: HBM EIA/JESD22-A114-A
exceeds 2000 V MM EIA/JESD22-A115-A
exceeds 200 V CDM EIA/JESD22-C101
exceeds 1000 V
Balanced propagation delays
All inputs have Schmitt-trigger actions
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Inputs accept voltages higher than V
CC
For AHC only: operates with CMOS input levels
For AHCT only: operates with TTL input levels
Specified from
40 to +85 and +125
°
C.
FUNCTION TABLE
See note 1.
Note
1.
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care.
DESCRIPTION
The 74AHC/AHCT157 are high-speed Si-gate CMOS
devices and are pin compatible with low power Schottky
TTL (LSTTL). They are specified in compliance with
JEDEC standard No. 7A.
The74AHC/AHCT157arequad2-inputmultiplexerswhich
select 4 bits of data from two sources under the control of
a common data select input (S). The enable input (E) is
active LOW. When E is HIGH, all of the outputs (1Y to 4Y)
are forced LOW regardless of all other input conditions.
Moving the data from two groups of registers to four
common output buses is a common use of the ‘157’. The
state of the common data select input (S) determines the
particular register from which the data comes. It can also
be used as a function generator.
The device is useful for implementing highly irregular logic
by generating any four of the 16 different functions of two
variables with one variable common.
The‘157’isthelogicimplementationofa4-pole,2-position
switch, where the position of the switch is determine by the
logic levels applied to S.
The logic equations are:
1Y = E
×
(1I
1
×
S + 1I
0
×
S);
2Y = E
×
(2I
1
×
S + 2I
0
×
S);
3Y = E
×
(3I
1
×
S + 3I
0
×
S);
4Y = E
×
(4I
1
×
S + 4I
0
×
S).
The ‘157’ is identical to the ‘158’ but has non-inverting
(true) outputs.
INPUT
OUTPUT
E
S
nI
0
X
L
H
X
X
nI
1
X
X
X
L
H
nY
H
L
L
L
L
X
L
L
H
H
L
L
H
L
H
ORDERING INFORMATION
OUTSIDE NORTH
AMERICA
NORTH AMERICA
PACKAGES
PINS
PACKAGE
MATERIAL
CODE
74AHC157D
74AHC157PW
74AHCT157D
74AHCT157PW
74AHC157D
74AHC157PW DH
74AHCT157D
74AHCT157PW DH
16
16
16
16
SO
plastic
plastic
plastic
plastic
SOT109-1
SOT403-1
SOT109-1
SOT403-1
TSSOP
SO
TSSOP
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| 74AHCT1G02 | 2-input NOR gate |
| 74AHCT1G04 | Inverter |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 74AHCT157BQ | 制造商:NXP Semiconductors 功能描述:IC QUAD 2 INPUT MUX DHVQFN1 |
| 74AHCT157BQ,115 | 功能描述:编码器、解码器、复用器和解复用器 2IN 4.5-5.5V 500 mW RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| 74AHCT157BQ115 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| 74AHCT157BQ-Q100X | 制造商:NXP Semiconductors 功能描述:74AHCT157BQ-Q100/DHVQFN16/REEL 制造商:NXP Semiconductors 功能描述:74AHCT157BQ-Q100/DHVQFN16/REEL - Tape and Reel 制造商:NXP Semiconductors 功能描述:IC MUX QUAD 2INPUT 16-DHVQFN |
| 74AHCT157D | 功能描述:编码器、解码器、复用器和解复用器 QUAD 2-MULTIPLEXER RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
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