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參數(shù)資料
| 型號(hào)： | 74VHC157SJX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | Quad 2-Input Multiplexer |
| 中文描述： | AHC/VHC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封裝： | 5.30 MM, EIAJ TYPE2, SOP-16 |
| 文件頁數(shù)： | 2/7頁 |
| 文件大?。?/td> | 70K |
| 代理商： | 74VHC157SJX |
www.fairchildsemi.com
2
7
Truth Table
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Functional Description
The VHC157 is a quad 2-input multiplexer. It selects four
bits of data from two sources under the control of a com-
mon Select input (S). The Enable input (E) is active-LOW.
When E is HIGH, all of the outputs (Z) are forced LOW
regardless of all other inputs. The VHC157 is the logic
implementation of a 4-pole, 2-position switch where the
position of the switch is determined by the logic levels sup-
plied to the Select input. The logic equations for the outputs
are shown below:
Z
a
=
E
(I
1a
S
+
I
0a
S)
Z
b
=
E (I
1b
S
+
I
0b
S)
Z
c
=
E (I
1c
S
+
I
0c
S)
Z
d
=
E (I
1d
S
+
I
0d
S)
A common use of the VHC157 is the moving of data from
two groups of registers to four common output busses. The
particular register from which the data comes is determined
by the state of the Select input. A less obvious use is as a
function generator. The VHC157 can generate any four of
the sixteen different functions of two variables with one
variable common. This is useful for implementing gating
functions.
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Inputs
Outputs
E
S
I
0
I
1
Z
H
X
X
X
L
L
H
X
L
L
L
H
X
H
H
L
L
L
X
L
L
L
H
X
H
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74VHC157M | Quadruple 2-Input Positive-NAND Gates 14-TSSOP -40 to 85 |
| 74VHC157N | Quad 2-Input Multiplexer |
| 74VHC161284MEA | Quadruple 2-Input Positive-NAND Gates 14-TSSOP -40 to 85 |
| 74VHC161284 | IEEE 1284 Transceiver |
| 74VHC161284MTDX | IEEE 1284 Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74VHC157T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD 2 CHANNEL MULTIPLEXER |
| 74VHC157TTR | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Quad 2-Ch Multiplexr 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 |
| 74VHC16 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-Bit Serial-In, Parallel-Out Shift Register |
| 74VHC161 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:4-Bit Binary Counter with Asynchronous Clear |
| 74VHC161284 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:IEEE 1284 Transceiver |
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