Datasheet 74AC11257PWR, 74AC11257N, 74AC11257DWR, 74AC11257DW, 74AC11257DBR Datasheet (Texas Instruments)

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

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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

†

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3

74AC11257

PARAMETER

TEST CONDITIONS

V

MIN

MAX

UNIT

I

mA

I

mA

PARAMETER

MIN

MAX

UNIT

A or B

Y

ns

A/B

Any Y

ns

OE

Any Y

ns

OE

Any Y

ns

QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS

SCAS049B – MARCH 1989 – REVISED JUNE 1996

electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)

CC

3 V 2.9 2.9

IOH = –50 mA

V

OH

V

OL

I

OZ

I

I

I

CC

C

i

C

†

Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.

o

IOH = –4 mA 3 V 2.58 2.48

= –24

OH

IOH = –75 mA

IOL = 50 mA

IOL = 12 mA 3 V 0.36 0.44

= 24

OL

IOL = 75 mA
VO = VCC or GND 5.5 V ±0.5 ±5
VI = VCC or GND 5.5 V ±0.1 ±1
VI = VCC or GND, IO = 0 5.5 V 8 80
VI = VCC or GND 5 V 3.5 pF
VO = VCC or GND 5.5 V 8 pF

†

†

4.5 V 4.4 4.4

5.5 V 5.4 5.4

4.5 V 3.94 3.8

5.5 V 4.94 4.8

5.5 V 3.85
3 V 0.1 0.1

4.5 V 0.1 0.1

5.5 V 0.1 0.1

4.5 V 0.36 0.44

5.5 V 0.36 0.44

5.5 V 1.65

TA = 25°C

MIN TYP MAX

V

V

m

A

m

A

m

A

switching characteristics over recommended operating free-air temperature range,
V

= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)

CC

TA = 25°C

MIN TYP MAX

1.5 5.6 8.1 1.5 8.9

1.5 6.2 9 1.5 10.1

1.5 6.1 9.2 1.5 10.2

1.5 6.6 10 1.5 11.2

1.5 5.6 8.2 1.5 9.1

1.5 7.5 10.4 1.5 11.8

1.5 5.6 7.6 1.5 8.3

1.5 6.2 8.8 1.5 9.6

t

PLH

t

PHL

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

FROM TO

(INPUT) (OUTPUT)

4

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PARAMETER

MIN

MAX

UNIT

A or B

Y

ns

A/B

Any Y

ns

OE

Any Y

ns

OE

Any Y

ns

CpdPower dissipation capacitance

C

f

pF

QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER

WITH 3-STATE OUTPUTS

SCAS049B – MARCH 1989 – REVISED JUNE 1996

switching characteristics, over recommended operating free-air temperature range,

= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)

V

CC

TA = 25°C

MIN TYP MAX

1.5 3.6 5.8 1.5 6.4

1.5 4.1 6.5 1.5 7.2

1.5 4 6.5 1.5 7.2

1.5 4.4 7.1 1.5 7.9

1.5 3.8 5.9 1.5 6.5

1.5 5 7.6 1.5 8.6

1.5 4.5 6.4 1.5 7.6

1.5 4.8 6.9 1.5 7.6

t

PLH

t

PHL

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

FROM TO

(INPUT) (OUTPUT)

74AC11257

operating characteristics, V

p

p

= 5 V, TA = 25°C

CC

PARAMETER TEST CONDITIONS TYP UNIT

Outputs enabled
Outputs disabled

= 50 pF,

L

p

= 1 MHz

37
11

p

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5

74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS

SCAS049B – MARCH 1989 – REVISED JUNE 1996

PARAMETER MEASUREMENT INFORMATION

2 × V

From Output

Under Test

CL = 50 pF

(see Note A)

500 Ω

500 Ω

LOAD CIRCUIT

S1

CC

Open

GND

TEST S1

t

PLH/tPHL

t

PLZ/tPZL

t

PHZ/tPZH

Open

2 × V

GND

CC

Input

t

PLH

In-Phase

Output

t

PHL

Out-of-Phase

Output

NOTES: A. CL includes probe and jig capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
D. The outputs are measured one at a time with one input transition per measurement.

50% 50%

50% V

CC

50% V

CC

VOLTAGE WAVEFORMS

Figure 1. Load Circuit and Voltage Waveforms

t

PHL

50% V

t

PLH

50% V

CC

CC

V

0 V

V

V

V

V

CC

OH

OL

OH

OL

Output

Control

(low-level

enabling)

Output

Waveform 1

S1 at 2 × V

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

CC

t

PZL

t

PZH

CC

CC

50%

20% V

80% V

50%

t

PLZ

50% V

t

PHZ

50% V

VOLTAGE WAVEFORMS

CC

CC

V

0 V

[

V

V

[

CC

V

OL

OH

0 V

CC

6

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