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74AC11257 Datasheet

  • 74AC11257

  • Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With ...

  • 12頁

  • TI

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74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B 鈥?MARCH 1989 鈥?REVISED JUNE 1996
D
D
D
D
D
D
D
3-State Outputs Interface Directly With
System Bus
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC
and GND Configurations
Minimize High-Speed Switching Noise
EPIC
t
(Enhanced-Performance Implanted
CMOS) 1-
m
m Process
500-mA Typical Latch-Up Immunity at
125擄C
Provides Bus Interface From Multiple
Sources in High-Performance Systems
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (N)
DW OR N PACKAGE
(TOP VIEW)
A/B
1Y
2Y
GND
GND
GND
GND
3Y
4Y
OE
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1A
1B
2A
2B
V
CC
V
CC
3A
3B
4A
4B
description
This device is designed to multiplex signals from 4-bit data sources to four output data lines in bus-organized
systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level.
The 74AC11257 is characterized for operation from 鈥?0擄C to 85擄C.
FUNCTION TABLE
INPUTS
OE
H
L
L
L
L
SELECT
A/B
X
L
L
H
H
DATA
A
X
L
H
X
X
B
X
X
X
L
H
Z
L
H
L
H
OUTPUT
Y
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
漏
1996, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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