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CY74FCT157T

更新时间： 2024-09-15 22:28:59
品牌 Logo 应用领域
德州仪器 - TI 复用器
页数 文件大小 规格书
6页 67K
描述
Quad 2-Input Multiplexer

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CY74FCT157T 数据手册

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Data sheet acquired from Cypress Semiconductor Corporation.  
Data sheet modified to remove devices not offered.  
CY54/74FCT157T  
SCCS014 - May 1994 - Revised February 2000  
Quad 2-Input Multiplexer  
Features  
Functional Description  
• Function, pinout, and drive compatible with FCT and  
The FCT157T is a quad two-input multiplexer that selects four  
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 (Y) are forced LOW  
regardless of all other input conditions.  
F logic  
• FCT-C speed at 4.3 ns max. (Com’l),  
FCT-A speed at 5.0 ns max. (Com’l)  
• Reduced VOH (typically = 3.3V) versions of equivalent  
FCT functions  
• Edge-rate control circuitry for significantly improved  
noise characteristics  
• Power-off disable feature  
• Matched rise and fall times  
• Fully compatible with TTL input and output logic levels  
• ESD > 2000V  
• Extended commercial range of −40˚C to +85˚C  
Moving data from two groups of registers to four common  
output buses is a common use of the FCT157T. The state of  
the Select input 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 sixteen different functions of two  
variables with one variable common.  
The FCT157T is a logic implementation of a four-pole,  
two-position switch where the position of the switch is  
determined by the logic levels supplied to the Select input.  
• Sink current  
64 mA (Com’l),  
32 mA (Mil)  
32 mA (Com’l),  
12 mA (Mil)  
Source current  
The outputs are designed with a power-off disable feature to  
allow for live insertion of boards.  
LogicBlock Diagram, FCT157T  
Pin Configurations  
I
0a  
I
1a  
I
0b  
I
1b  
I
0c  
I
1c  
I
0d  
I
1d  
E
S
LCC  
Top View  
SOIC/QSOP  
Top View  
1
2
3
4
5
6
7
8
S
V
16  
15  
14  
13  
12  
CC  
7
6 5 4  
8
I
0a  
E
I
Y
I
0a  
b
9
3
2
1
I
0d  
1a  
GND  
NC  
S
10  
11  
FCT157T  
FCT157T  
I
1d  
Y
a
NC  
V
Y
c
12  
13  
I
Y
d
20  
19  
CC  
0b  
I
1c  
I
0c  
E
I
1b  
11  
10  
9
1516 17 18  
14  
I
1c  
Y
b
GND  
Y
c
Y
a
Y
b
Y
c
Y
d
Logic Symbol  
E
S
I
0a  
I
1a  
I
0b  
I
I
I
1c  
I
0d  
I
1d  
1b  
0c  
FCT157T  
Y
a
Y
b
Y
c
Y
d
FCT157T–1  
Copyright © 2000, Texas Instruments Incorporated  
123456

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