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AC11257 Datasheet

  • AC11257

  • QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-...

  • 302.11KB

  • 12頁

  • TI

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74AC11257
QUADRUPLE 2 LINE TO 1 LINE DATA SELECTOR/MULTIPLEXER
WITH 3 STATE OUTPUTS
SCAS049C 鈭?MARCH 1989 鈭?REVISED MAY 2004
D
3-State Outputs Interface Directly With
D
D
D
D
System Bus
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC
and GND Configurations
Minimize High-Speed Switching Noise
500-mA Typical Latch-Up Immunity at
125擄C
Provides Bus Interface From Multiple
Sources in High-Performance Systems
DB, DW, N, OR PW PACKAGE
(TOP VIEW)
description/ordering information
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
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.
To ensure the high-impedance state during power up or power down, OE should be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
TA
PDIP 鈭?N
SOIC 鈭?DW
鈭?0擄C to 85擄C
SSOP 鈭?DB
TSSOP 鈭?PW
PACKAGE鈥?/div>
Tube
Tube
Tape and reel
Tape and reel
Tube
Tape and reel
ORDERABLE
PART NUMBER
74AC11257N
74AC11257DW
74AC11257DWR
74AC11257DBR
74AC11257PW
74AC11257PWR
AE257
AC11257
AE257
TOP-SIDE MARKING
74AC11257N
鈥?Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
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
錚?/div>
2004, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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