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参数资料
| 型号： | 74ALS157D |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 通用总线功能 |
| 英文描述： | Data selector/multiplexer |
| 中文描述： | ALS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封装： | PLASTIC, SO-16 |
| 文件页数： | 2/9页 |
| 文件大小： | 109K |
| 代理商： | 74ALS157D |
Philips Semiconductors
Product specification
74ALS157/74ALS158
Data selector/multiplexer
74ALS157 Quad 2-input data selector/multiplexer, non-inverting
74ALS158 Quad 2-input data selector/multiplexer, inverting
2
1991 Feb 08
853–1129 01670
DESCRIPTION
The 74ALS157 is a quad 2-input multiplexer which selects 4 bits of
data from one of two sources under the control of a common select
input (S). The enable input (E) is active when Low. When E is High,
all of the outputs (Yn) are forced Low regardless of all other input
conditions.
Moving data from two registers to a common output bus is a typical
use of the 74ALS157. The state of the select input determines the
particular register from which data comes.
The device is the logic implementation of 4-pole, 2-position switch
where the position of the switch is determined by the logic levels
supplied to the select input. The 74ALS158 is similar but has
inverting outputs (Yn).
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS157
6.0ns
6mA
74ALS158
6.0ns
6mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±
10%,
T
amb
= 0
°
C to +70
°
C
DRAWING
NUMBER
16-pin plastic DIP
74ALS157N, 74ALS158N
SOT38-4
16-pin plastic SO
74ALS157D, 74ALS158D
SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Ina, Inb, Inc, Ind
Data inputs
1.0/1.0
20
μ
A/0.1mA
20
μ
A/0.1mA
20
μ
A/0.1mA
S
Select input
1.0/1.0
E
Enable input
1.0/1.0
Ya – Yd, Ya – Yd
NOTE:
One (1.0) ALS unit load is defined as: 20
μ
A in the High state and 0.1mA in the Low state.
Data outputs
20/240
0.4mA/24mA
PIN CONFIGURATION – 74ALS157
16
15
14
13
12
11
10
7
6
5
4
3
2
1
Yb
V
CC
Yd
I0c
I1c
I1d
E
I0d
S
I0a
I1b
I1a
Ya
I0b
9
8
GND
Yc
SC00051
PIN CONFIGURATION – 74ALS158
16
15
14
13
12
11
10
7
6
5
4
3
2
1
Yb
V
CC
Yd
I0c
I1c
I1d
E
I0d
S
I0a
I1b
I1a
Ya
I0b
9
8
GND
Yc
SC00052
LOGIC SYMBOL – 74ALS157
V
= Pin 16
GND = Pin 8
SC00053
1
15
S
E
2
3
5
6
11
10
14
I0a
I1a
I0b
I1b
I0c
I1c
I0d
Ya
Yb
Yc
Yd
4
7
9
12
13
I1d
LOGIC SYMBOL – 74ALS158
V
= Pin 16
GND = Pin 8
SC00054
1
15
S
E
2
3
5
6
11
10
14
I0a
I1a
I0b
I1b
I0c
I1c
I0d
Ya
Yb
Yc
Yd
4
7
9
12
13
I1d
相关PDF资料 |
PDF描述 |
|---|---|
| 74ALS157 | Quad 2-input data selector/multiplexer, non-inverting(四通道2输入数据选择器/多路复用器，同相) |
| 74ALS158 | Quad 2-input data selector/multiplexer, inverting(四通道2输入数据选择器/多路复用器，反相) |
| 74ALS157N | Data selector/multiplexer |
| 74ALS158D | Data selector/multiplexer |
| 74ALS158N | Data selector/multiplexer |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 74ALS157MX | 制造商:Texas Instruments 功能描述: |
| 74ALS157N | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Data selector/multiplexer |
| 74ALS158 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Data selector/multiplexer |
| 74ALS158D | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 74ALS158N | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Data selector/multiplexer |
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