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参数资料
| 型号： | SN74LS253MEL |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | LS SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封装： | EIAJ, SOP-16 |
| 文件页数： | 3/7页 |
| 文件大小： | 206K |
| 代理商： | SN74LS253MEL |
SN74LS253
http://onsemi.com
3
LOGIC DIAGRAM
E0b
I3b
I2b
I1b
I0b
S0
S1
I3a
I2a
I1a
I0a
E0a
Zb
Za
14
1
26
7
3
4
5
9
11
13
10
12
15
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
FUNCTIONAL DESCRIPTION
The LS253 contains two identical 4-Input Multiplexers
with 3-state outputs. They select two bits from four sources
selected by common select inputs (S0, S1). The 4-input
multiplexers have individual Output Enable (E0a, E0b)
inputs which when HIGH, forces the outputs to a high
impedance (high Z) state.
The LS253 is the logic implementation of a 2-pole,
4-position switch, where the position of the switch is
determined by the logic levels supplied to the two select
inputs. The logic equations for the outputs are shown below:
If the outputs of 3-state devices are tied together, all but
one device must be in the high impedance state to avoid high
currents that would exceed the maximum ratings. Designers
should ensure that Output Enable signals to 3-state devices
whose outputs are tied together are designed so that there is
no overlap.
Za = E0a (I0a S1 S0 + I1a S1 S0 I2a S1 S0 + I3a S1 S0)
Zb = E0b (I0b S1 S0 + I1b S1 S0 I2b S1 S0 + I3b S1 S0)
TRUTH TABLE
SELECT
INPUTS
DATA INPUTS
OUTPUT
ENABLE
OUTPUT
S0
S1
I0
I1
I2
I3
E0
Z
X
H
(Z)
L
LL
XX
X
L
LH
XX
X
L
H
LX
X
L
H
LX
HX
X
L
H
L
HX
XL
X
L
HX
XH
X
L
H
HX
XX
L
H
X
H
L
H
H = HIGH Level
L = LOW Level
X = Irrelevant
(Z) = High Impedance (off)
Address inputs S0 and S1 are common to both sections.
相关PDF资料 |
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| SN74LS256JD | LS SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, CDIP16 |
| SN74LS256JS | LS SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, CDIP16 |
| SN74LS257AJDS | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CDIP16 |
| SN74LS257ANS | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDIP16 |
| SN74LS258ANS | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, INVERTED OUTPUT, PDIP16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS253N | 功能描述:编码器、解码器、复用器和解复用器 Dual 4-to-1 Data Slct/Mltpx W/3St Otp 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 |
| SN74LS253NE4 | 功能描述:编码器、解码器、复用器和解复用器 Dual 4-to-1 Data Slct/Mltpx W/3St Otp 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 |
| SN74LS253NMOT87 | 制造商:Motorola 功能描述:74LS253N |
| SN74LS253NS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS253NSR | 功能描述:编码器、解码器、复用器和解复用器 Dual 4-to-1 Data Slct/Mltpx W/3St Otp 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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