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74AC11257DWE4 Arkusz danych(PDF) 1 Page - Texas Instruments

Numer części 74AC11257DWE4
Szczegółowy opis  QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

74AC11257DWE4 Arkusz danych(HTML) 1 Page - Texas Instruments

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74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049C − MARCH 1989 − REVISED MAY 2004
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D 3-State Outputs Interface Directly With
System Bus
D Flow-Through Architecture Optimizes
PCB Layout
D Center-Pin V
CC and GND Configurations
Minimize High-Speed Switching Noise
D 500-mA Typical Latch-Up Immunity at
125
°C
D Provides Bus Interface From Multiple
Sources in High-Performance Systems
description/ordering information
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 VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE MARKING
PDIP − N
Tube
74AC11257N
74AC11257N
SOIC
DW
Tube
74AC11257DW
AC11257
40
°Cto85°C
SOIC − DW
Tape and reel
74AC11257DWR
AC11257
−40
°C to 85°C
SSOP − DB
Tape and reel
74AC11257DBR
AE257
TSSOP
PW
Tube
74AC11257PW
AE257
TSSOP − PW
Tape and reel
74AC11257PWR
AE257
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OUTPUT
OE
SELECT
DATA
OUTPUT
Y
OE
SELECT
A/B
A
B
Y
H
X
X
X
Z
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
Copyright
© 2004, 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.
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.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A/B
1Y
2Y
GND
GND
GND
GND
3Y
4Y
OE
1A
1B
2A
2B
VCC
VCC
3A
3B
4A
4B
DB, DW, N, OR PW PACKAGE
(TOP VIEW)


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