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74FST3257/D Datasheet

  • 74FST3257/D

  • Quad 2:1 Multiplexer/Demultiplexer Bus Switch

  • 86.73KB

  • 8頁

  • ETC

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

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