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74FST3257/D PDF预览

74FST3257/D

更新时间: 2024-11-04 23:24:11
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8页 86K
描述
Quad 2:1 Multiplexer/Demultiplexer Bus Switch

74FST3257/D 数据手册

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74FST3257  
Quad 2:1 Multiplexer/  
Demultiplexer Bus Switch  
The ON Semiconductor 74FST3257 is a quad 2:1, high performance  
multiplexer/demultiplexer bus switch. The device is CMOS TTL  
compatible when operating between 4 and 5.5 Volts. The device  
http://onsemi.com  
MARKING  
exhibits extremely low R and adds nearly zero propagation delay.  
ON  
The device adds no noise or ground bounce to the system.  
R t 4 W Typical  
ON  
DIAGRAMS  
Less Than 0.25 ns–Max Delay Through Switch  
Nearly Zero Standby Current  
16  
16  
No Circuit Bounce  
S3257  
ALYW  
1
Control Inputs are TTL/CMOS Compatible  
Pin–For–Pin Compatible With QS3257, FST3257, CBT3257  
All Popular Packages: QSOP–16, TSSOP–16, SOIC–16  
QSOP–16  
QS SUFFIX  
CASE 492  
1
16  
16  
FST  
3257  
ALYW  
S
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
V
OE  
4B  
4B  
2
4A  
3B  
CC  
1
Function  
S
OE  
1B  
1
TSSOP–16  
DT SUFFIX  
CASE 948F  
1B  
2
Disconnect  
X
L
H
H
L
L
1
1A  
A = B  
1
2B  
1
A = B  
1
2
2B  
2
1
2A  
GND  
3B  
3A  
16  
1
2
16  
FST3257  
AWLYWW  
1
Figure 1. 16–Lead  
Pinout  
Figure 2. Truth Table  
SO–16  
D SUFFIX  
CASE 751B  
A
= Assembly Location  
= Year  
PIN NAMES  
Pin  
L, WL = Wafer Lot  
Y
Description  
W, WW = Work Week  
OE , OE  
Bus Switch Enables  
Select Inputs  
Bus A  
1
2
S , S  
0
1
A
ORDERING INFORMATION  
B , B , B , B  
4
Bus B  
Device  
Package  
Shipping  
1
2
3
74FST3257D  
SO–16  
SO–16  
48 Units/Rail  
2500 Units/Reel  
96 Units/Rail  
74FST3257DR2  
74FST3257DT  
TSSOP–16  
74FST3257DTR2 TSSOP–16 2500 Units/Reel  
74FST3257QS  
QSOP–16  
QSOP–16  
96 Units/Rail  
74FST3257QSR  
2500 Units/Reel  
Semiconductor Components Industries, LLC, 2002  
1
Publication Order Number:  
January, 2002 – Rev. 1  
74FST3257/D  

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