Texas Instruments 74AC11257PWR, 74AC11257N, 74AC11257DWR, 74AC11257DW, 74AC11257DBR Datasheet
OE
Y
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
D
3-State Outputs Interface Directly With
System Bus
D
Flow-Through Architecture Optimizes
PCB Layout
D
Center-Pin VCC and GND Configurations
Minimize High-Speed Switching Noise
D
EPIC
t
(Enhanced-Performance Implanted
CMOS) 1-mm Process
D
500-mA Typical Latch-Up Immunity at
125°C
D
Provides Bus Interface From Multiple
Sources in High-Performance Systems
D
Package Options Include Plastic
DW OR N PACKAGE
(TOP VIEW)
A/B
1
1Y
2
2Y
3
GND
GND
GND
GND
3Y
4Y
OE
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1A
1B
2A
2B
V
V
3A
3B
4A
4B
CC
CC
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (N)
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 –40°C to 85°C.
FUNCTION TABLE
INPUTS
SELECT
A/B
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
DATA
A B
OUTPUT
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1996, Texas Instruments Incorporated
1
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
logic symbol
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
†
10
OE
A
1A
1B
2A
2B
3A
3B
4A
4B
1
/B
20
19
18
17
14
13
12
11
EN
G1
1
1
MUX
logic diagram (positive logic)
10
OE
1
A
/B
2
1Y
3
2Y
8
3Y
9
4Y
1A
1B
2A
2B
3A
3B
4A
4B
20
19
18
17
14
13
12
11
2
1Y
3
2Y
8
3Y
9
4Y
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
Input voltage range, VI (see Note 1) –0.5 V to V
Output voltage range, VO (see Note 1) –0.5 V to V
Input clamp current, I
Output clamp current, I
Continuous output current, I
Continuous current through VCC or GND ±100 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum power dissipation at TA = 55°C (in still air) (see Note 2):DW package 1.6 W. . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils,
except for the N package, which has a trace length of zero.
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
(V
< 0 or VI > VCC) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IK
I
(V
< 0 or VO > VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OK
O
(V
= 0 to VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
O
N package 1.3 W. . . . . . . . . . . . . . . . . . . .
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
CC
CC
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
recommended operating conditions
MIN NOM MAX UNIT
VCC Supply voltage 3 5 5.5 V
VCC = 3 V 2.1
V
V
V
V
I
OH
I
OL
Dt/D
T
High-level input voltage
IH
Low-level input voltage
IL
I
O
A
Input voltage 0 V
Output voltage 0 V
High-level output current
Low-level output current
v Input transition rise or fall rate 0 10 ns/V
Operating free-air temperature –40 85 °C
VCC = 4.5 V
VCC = 5.5 V 3.85
VCC = 3 V 0.9
VCC = 4.5 V
VCC = 5.5 V 1.65
VCC = 3 V –4
VCC = 4.5 V
VCC = 5.5 V –24
VCC = 3 V 12
VCC = 4.5 V
VCC = 5.5 V 24
3.15
1.35
CC
CC
–24
24
V
V
V
V
mA
mA
†
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
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