74FST3257D ONSEMI [ON Semiconductor], 74FST3257D Datasheet

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74FST3257D

Manufacturer Part Number
74FST3257D
Description
Quad 2:1 Multiplexer/Demultiplexer Bus Switch
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet

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74FST3257
Quad 2:1 Multiplexer/
Demultiplexer Bus Switch
multiplexer/demultiplexer bus switch. The device is CMOS TTL
compatible when operating between 4 and 5.5 Volts. The device
exhibits extremely low R
The device adds no noise or ground bounce to the system.
Features
© Semiconductor Components Industries, LLC, 2007
January, 2007 − Rev. 4
The ON Semiconductor 74FST3257 is a quad 2:1, high performance
R
Less Than 0.25 ns−Max Delay Through Switch
Nearly Zero Standby Current
No Circuit Bounce
Control Inputs are TTL/CMOS Compatible
Pin−For−Pin Compatible With QS3257, FST3257, CBT3257
All Popular Packages: SOIC−16, TSSOP−16, QSOP−16
Pb−Free Packages are Available
ON
t 4 W Typical
GND
S
X
H
L
1B
1B
2B
2B
Figure 1. 16−Lead Pinout
1A
2A
S
Figure 2. Truth Table
1
2
1
2
ON
1
2
3
4
5
6
7
8
and adds nearly zero propagation delay.
OE
H
L
L
16
15
14
13
12
10
11
9
Disconnect
Function
A = B
A = B
4B
V
OE
4B
4A
3B
3A
3B
CC
2
1
1
1
2
2
1
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
16
16
PIN NAMES
16
OE
S
A
B
CASE 948F
DT SUFFIX
QS SUFFIX
TSSOP−16
CASE 492
(Note: Microdot may be in either location)
QSOP−16
CASE 751B
0
1
D SUFFIX
, S
, B
SOIC−16
1
, OE
1
2
ORDERING INFORMATION
1
A
WL, L
Y
WW, W = Work Week
G
, B
1
2
3
1
Pin
, B
http://onsemi.com
4
= Assembly Location
= Wafer Lot
= Year
= Pb−Free Package
16
Publication Order Number:
1
Bus Switch Enables
16
16
1
1
Select Inputs
Description
DIAGRAMS
MARKING
FST3257G
AWLYWW
Bus A
Bus B
ALYW G
S3257
ALYW
3257
FST
74FST3257/D
G

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74FST3257D Summary of contents

Page 1

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 and ...

Page 2

... ORDERING INFORMATION Device Order Number 74FST3257D 74FST3257DR2 74FST3257DR2G 74FST3257DT 74FST3257DTR2 74FST3257DTR2G 74FST3257QS 74FST3257QSR †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *This package is inherently Pb−Free. 74FST3257 FLOW CONTROL Figure 3 ...

Page 3

MAXIMUM RATINGS Symbol V DC Supply Voltage Input Voltage Output Voltage Input Diode Current Output Diode Current Output Sink Current Supply Current ...

Page 4

DC ELECTRICAL CHARACTERISTICS Symbol Parameter V Clamp Diode Resistance IK V High−Level Input Voltage IH V Low−Level Input Voltage IL I Input Leakage Current I I Off−State Leakage Current OZ R Switch On Resistance (Note Quiescent Supply ...

Page 5

AC Loading and Waveforms FROM OUTPUT UNDER TEST NOTES: 1. Input driven source terminated includes load and stray capacitance Figure 4. AC Test Circuit t = ...

Page 6

G K −T− SEATING PLANE 0.25 (0.010 74FST3257 PACKAGE DIMENSIONS SOIC−16 D SUFFIX CASE 751B−05 ISSUE 0.25 (0.010 ...

Page 7

K 16X REF 0.10 (0.004) 0.15 (0.006 L PIN 1 IDENT. 1 0.15 (0.006 −V− C 0.10 (0.004) −T− SEATING PLANE D 16X 0.36 74FST3257 PACKAGE DIMENSIONS TSSOP−16 DT SUFFIX ...

Page 8

R −B− 0.25 (0.010 0.25 (0.010 Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes ...

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