Datasheet 74ACT11257PWR, 74ACT11257N, 74ACT11257DWR, 74ACT11257DW, 74ACT11257DBR Datasheet (Texas Instruments)

74ACT11257

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

WITH 3-STATE OUTPUTS

SCAS053B – JANUARY 1989 – REVISED APRIL 1996

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Inputs Are TTL-Voltage Compatible

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
Small-Outline (DW) and Shrink
Small-Outline (DB) Packages, and Standard
Plastic 300-mil DIPs (N)

description

The 74ACT11257 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 74ACT11257 is characterized for operation from –40°C to 85°C.

FUNCTION TABLE

INPUTS

SELECT

DATA

OUTPUT

OE

A/B

A B

Y

H X X X Z
L L L XL
L L H XH
L H X LL
L H X H H

Copyright  1996, 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.

EPIC is a trademark of Texas Instruments Incorporated.

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
V

CC

V

CC

3A
3B
4A
4B

DB, DW, OR N PACKAGE

(TOP VIEW)

74ACT11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS

SCAS053B – JANUARY 1989 – REVISED APRIL 1996

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic symbol

†

4B

4A

3B

3A

2B

2A

1B

1A

A

/B

OE

11

12

13

14

17

18

19

20

1

10

G1

EN

1

1

4Y

3Y

2Y

1Y

9

8

3

2

MUX

†

This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

logic diagram (positive logic)

4B

4A

3B

3A

2B

2A

1B

1A

A/B

OE

11

12

13

14

17

18

19

20

1

10

4Y

3Y

2Y

1Y

9

8

3

2

74ACT11257

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

WITH 3-STATE OUTPUTS

SCAS053B – JANUARY 1989 – REVISED APRIL 1996

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†

Supply voltage range, V

CC

–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, VI (see Note 1) –0.5 V to V

CC

+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range, VO (see Note 1) –0.5 V to V

CC

+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input clamp current, I

IK

(V

I

< 0 or VI > VCC) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output clamp current, I

OK

(V

O

< 0 or VO > VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous output current, I

O

(V

O

= 0 to VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous current through VCC or GND ±100 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maximum power dissipation at TA = 55°C (in still air) (see Note 2):DB package 0.6 W. . . . . . . . . . . . . . . . . . .

DW package 1.6 W. . . . . . . . . . . . . . . . . .

N package 1.3 W. . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

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.

recommended operating conditions

MIN MAX UNIT

V

CC

Supply voltage 4.5 5.5 V

V

IH

High-level input voltage 2 V

V

IL

Low-level input voltage 0.8 V

V

I

Input voltage 0 V

CC

V

V

O

Output voltage 0 V

CC

V

I

OH

High-level output current –24 mA

I

OL

Low-level output current 24 mA

Dt/D

v Input transition rise or fall rate 0 10 ns/V

T

A

Operating free-air temperature –40 85 °C

74ACT11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS

SCAS053B – JANUARY 1989 – REVISED APRIL 1996

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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

TA = 25°C

PARAMETERS

TEST CONDITIONS

V

CC

MIN TYP MAX

MIN

MAX

UNIT

4.5 V 4.4 4.4

I

OH

= –50

m

A

5.5 V 5.4 5.4

V

OH

4.5 V 3.94 3.8

V

OH

I

OH

= –24

mA

5.5 V 4.94 4.8

IOH = –75 mA

{

5.5 V 3.85

4.5 V 0.1 0.1

I

OL

= 50

m

A

5.5 V 0.1 0.1

V

OL

4.5 V 0.36 0.44

V

OL

I

OL

=

24 mA

5.5 V 0.36 0.44

IOL = 75 mA

{

5.5 V 1.65

I

OZ

VO = VCC or GND 5.5 V ±0.5 ±5

m

A

I

I

VI = VCC or GND 5.5 V ±0.1 ±1

m

A

I

CC

VI = VCC or GND, IO = 0 5.5 V 8 80

m

A

D

I

CC

‡

One input at 3.4 V , Other inputs at VCC or GND 5.5 V 0.9 1 mA

C

i

VI = VCC or GND 5 V 3.5 pF

C

o

VO = VCC or GND 5 V 8 pF

†

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

‡

This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V to VCC.

switching characteristics over recomended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)

FROM TO

TA = 25°C

PARAMETER

(INPUT) (OUTPUT)

MIN TYP MAX

MIN

MAX

UNIT

t

PLH

1.5 4.4 6.4 1.5 6.9

t

PHL

A or B

Y

1.5 5 8 1.5 8.7

ns

t

PLH

1.5 4.7 7.6 1.5 8.2

t

PHL

A/B

Any Y

1.5 5.7 8.5 1.5 9.4

ns

t

PZH

1.5 4.2 6.9 1.5 7.3

t

PZL

OE

Any Y

1.5 5.5 8.7 1.5 9.6

ns

t

PHZ

1.5 5.7 7.6 1.5 8.4

t

PLZ

OE

Any Y

1.5 6 7.9 1.5 8.5

ns

operating characteristics, V

CC

= 5 V, T

A

= 25°C

PARAMETER TEST CONDITIONS TYP UNIT

p

p

Outputs enabled

p

41

p

CpdPower dissipation capacitance

Outputs disabled

C

L

=

50 pF

,

f

= 1 MHz

13

pF

74ACT11257

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

WITH 3-STATE OUTPUTS

SCAS053B – JANUARY 1989 – REVISED APRIL 1996

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

50% V

CC

t

PLH

t

PHL

t

PHL

t

PLH

V

OH

V

OH

V

OL

V

OL

1.5 V 1.5 V

3 V

0 V

50% V

CC

50% V

CC

Input

Out-of-Phase

Output

In-Phase

Output

50% V

CC

VOLTAGE WAVEFORMS

From Output

Under Test

CL = 50 pF

(see Note A)

LOAD CIRCUIT

S1

2 × V

CC

500 Ω

500 Ω

Output

Control
(low-level
enabling)

Output

Waveform 1

S1 at 2 × V

CC

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

V

OL

V

OH

t

PZL

t

PZH

t

PLZ

t

PHZ

1.5 V

1.5 V

[

V

CC

0 V

50% V

CC

20% V

CC

50% V

CC

80% V

CC

[

0 V

3 V

GND

Open

VOLTAGE WAVEFORMS

t

PLH/tPHL

t

PLZ/tPZL

t

PHZ/tPZH

Open

2 × V

CC

GND

TEST S1

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.

Figure 1. Load Circuit and Voltage Waveforms

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