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54AC157L PDF预览

54AC157L

更新时间: 2024-02-22 03:14:40
品牌 Logo 应用领域
美国国家半导体 - NSC 复用器
页数 文件大小 规格书
8页 140K
描述
Quad 2-Input Multiplexer

54AC157L 技术参数

是否Rohs认证:不符合生命周期:Obsolete
包装说明:CERAMIC, LCC-20Reach Compliance Code:unknown
HTS代码:8542.39.00.01风险等级:5.1
Is Samacsys:N系列:AC
JESD-30 代码:S-CQCC-N20JESD-609代码:e0
长度:8.89 mm负载电容(CL):50 pF
逻辑集成电路类型:MULTIPLEXER最大I(ol):0.012 A
功能数量:4输入次数:2
输出次数:1端子数量:20
最高工作温度:125 °C最低工作温度:-55 °C
输出极性:TRUE封装主体材料:CERAMIC, METAL-SEALED COFIRED
封装代码:QCCN封装等效代码:LCC20,.35SQ
封装形状:SQUARE封装形式:CHIP CARRIER
峰值回流温度(摄氏度):NOT SPECIFIED电源:3.3/5 V
Prop。Delay @ Nom-Sup:11 ns传播延迟(tpd):11.5 ns
认证状态:Not Qualified筛选级别:38535Q/M;38534H;883B
座面最大高度:1.905 mm子类别:Multiplexer/Demultiplexers
最大供电电压 (Vsup):6 V最小供电电压 (Vsup):2 V
标称供电电压 (Vsup):5 V表面贴装:YES
技术:CMOS温度等级:MILITARY
端子面层:Tin/Lead (Sn/Pb)端子形式:NO LEAD
端子节距:1.27 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:8.89 mm
Base Number Matches:1

54AC157L 数据手册

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Functional Description  
The ’AC/’ACT157 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 re-  
gardless of all other inputs. The ’AC/’ACT157 is the logic  
implementation of a 4-pole, 2-position switch where the posi-  
tion of the switch is determined by the logic levels supplied to  
the Select input. The logic equations for the outputs are  
shown below:  
of the sixteen different functions of two variables with one  
variable common. This is useful for implementing gating  
functions.  
Truth Table  
Inputs  
Outputs  
E
H
L
L
L
L
S
X
H
H
L
I0  
X
X
X
L
I1  
X
L
Z
L
=
Za E (I1a S + I0a S)  
L
=
Zb E (I1b S + I0b S)  
H
X
X
H
L
=
Zc E (I1c S + I0c S)  
=
Zd E (I1d S + I0d S)  
L
H
H
A common use of the ’AC/ACT157 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 ’AC/’ACT157 can generate any four  
=
=
=
H
L
X
HIGH Voltage Level  
LOW Voltage Level  
Immaterial  
Logic Diagram  
DS100272-5  
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.  
www.national.com  
2

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