參數(shù)資料
型號(hào)： 74AHC157
廠商： NXP Semiconductors N.V.
英文描述： Quad 2-input multiplexer
中文描述： 四2輸入復(fù)用器
文件頁(yè)數(shù)： 2/16頁(yè)
文件大?。?/td> 84K
代理商： 74AHC157
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
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
74AHC157BQ 制造商:NXP Semiconductors 功能描述:IC QUAD 2 INPUT MUX DHVQFN1
74AHC157BQ,115 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 5V QUAD 2-INPUT RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray
74AHC157BQ-G 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 5V QUAD 2-INPUT MULTIPLEXER RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray
74AHC157BQ-Q100X 制造商:NXP Semiconductors 功能描述:74AHC157BQ-Q100/DHVQFN16/REEL7 制造商:NXP Semiconductors 功能描述:74AHC157BQ-Q100/DHVQFN16/REEL7 - Tape and Reel 制造商:NXP Semiconductors 功能描述:IC MUX QUAD 2INPUT 16-DHVQFN
74AHC157D 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 QUAD 2-MULTIPLEXER RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray
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