TEXAS INSTRUMENTS SN74AS353B Technical data

SN74AS353B

OE

Y

DUAL 1-OF-4 DATA SELECTOR/MULTIPLEXER

WITH 3-STATE OUTPUTS

SDAS222A – APRIL 1982 – REVISED DECEMBER 1994

• Inverting Version of ′AS253

• Permits Multiplexing From n Lines to

One Line

• Performs Parallel-to-Serial Conversion

• Package Options Include Plastic

Small-Outline (D) Packages and Standard
Plastic (N) 300-mil DIPs

description

This data selector/multiplexer contains inverters

D OR N PACKAGE

(TOP VIEW)

1OE

1

B

2

1C3

3

1C2

4

1C1

5

1C0

6

1Y

7

GND

8

16
15
14
13
12
11
10

V

CC

2OE
A
2C3
2C2
2C1
2C0
2Y

9

and drivers to supply full binary decoding data
selection to the AND-OR-invert gates. Separate
output-enable (OE

) inputs are provided for each of

the two 4-line sections.
The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the

common outputs disabled (at the high-impedance state), the low impedance of the single enabled output drives
the bus line to a high or low logic level. Each section has its own output enable. The output is disabled when
OE

is high.

The SN74ALS353B is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

INPUTS

SELECT DATA

B A C0 C1 C2 C3

X X X X X X H Z

L LLXXXL H
LLHXXXL L
LHXLXXL H

LHXHXXL L
HLXXLXL H
HLXXHXL L
HHXXXLL H
HHXXXHL L

Select inputs A and B are common to both sections.

OUTPUT

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  1994, Texas Instruments Incorporated

1

SN74AS353B
DUAL 1-OF-4 DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS

SDAS222A – APRIL 1982 – REVISED DECEMBER 1994

logic symbol

†

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

†

1OE

1C0
1C1
1C2
1C3

2OE

2C0
2C1
2C2
2C3

14

A

2

B

1
6
5
4
3

15
10
11
12
13

0
1

EN
0
1
2
3

G

0
3

MUX

logic diagram (positive logic)

1

1OE

7

1Y

9

2Y

Data 1

Select

Data 2

1C0

1C1

1C2

1C3

2C0

2C1

2C2

2C3

2OE

6

5

7

1Y

4

3

2

B

14

A

10

11

12

13

15

9

2Y

2

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SN74AS353B

V

V

I

V

V

V

mA

I

V

V

V

A

I

V

5.5 V

V

0.4 V

mA

DUAL 1-OF-4 DATA SELECTOR/MULTIPLEXER

WITH 3-STATE OUTPUTS

SDAS222A – APRIL 1982 – REVISED DECEMBER 1994

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

Supply voltage, V
Input voltage, V

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

†

Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

Storage temperature range –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.

recommended operating conditions

MIN NOM MAX UNIT

V
V
V
I
I
T

CC
IH

IL
OH
OL

A

Supply voltage 4.5 5 5.5 V
High-level input voltage 2 V
Low-level input voltage 0.8 V
High-level output current –15 mA
Low-level output current 48 mA
Operating free-air temperature 0 70 °C

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

PARAMETER TEST CONDITIONS MIN TYP‡MAX UNIT

V

IK

OH

V

OL

I

OZH

I

OZL

I

IH

IL

I

O

I

CC

‡

All typical values are at VCC = 5 V, TA = 25°C.

§

The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

A, B
All others
A, B
All others
A, B
All others

§

VCC = 4.5 V, II = –18 mA –1.2 V
VCC = 4.5 V to 5.5 V, IOH = –2 mA VCC –2
VCC = 4.5 V, IOH = –15 mA 2.4 3.3
VCC = 4.5 V, IOL = 48 mA 0.35 0.5 V
VCC = 5.5 V, VO = 2.7 V 50 µA
VCC = 5.5 V, VO = 0.4 V –50 µA

= 5.5 V,

CC

= 5.5 V,

CC

,

=

CC

VCC = 5.5 V, VO = 2.25 V –30 –112 mA

VCC = 5.5 V

= 7

I

= 2.7

I

=

I

Outputs high 15 24
Outputs low 19 31
Outputs disabled 18 30

0.2

0.1
40
20

–1

–0.5

µ

mA

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3

SN74AS353B

A or B

Y

ns

Y

ns

OE

Y

ns

OE

Y

ns

DUAL 1-OF-4 DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS

SDAS222A – APRIL 1982 – REVISED DECEMBER 1994

switching characteristics (see Figure 1)

VCC = 4.5 V to 5.5 V,
CL = 50 pF,

PARAMETER

t

PLH

t

PHL

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

†

For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

PLZ

FROM

(INPUT)

Data

(any C)

TO

(OUTPUT)

R1 =500 Ω
R2 = 500 Ω,
TA = MIN to MAX

MIN MAX

,

3 10

2.5 9
2 7
1 6
1 5
2 9
1 6
1 5

UNIT

†

4

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From Output

Under Test

(see Note A)

SN74AS353B

DUAL 1-OF-4 DATA SELECTOR/MULTIPLEXER

WITH 3-STATE OUTPUTS

SDAS222A – APRIL 1982 – REVISED DECEMBER 1994

PARAMETER MEASUREMENT INFORMATION

SERIES 54ALS/74ALS AND 54AS/74AS DEVICES

7 V

V

CC

S1

R

L

Test
Point

C

L

R

L

From Output

Under Test

C

(see Note A)

Test
Point

L

From Output

Under Test

(see Note A)

R1

C

L

RL = R1 = R2

Test
Point

R2

LOAD CIRCUIT FOR

BI-STATE

TOTEM-POLE OUTPUTS

Timing

Input

t

su

Data

Input

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

Output

Control

(low-level

enabling)

Waveform 1

S1 Closed

(see Note B)

Waveform 2

S1 Open

(see Note B)

t

PZL

t

PZH

ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS

VOLTAGE WAVEFORMS

1.3 V

t

PHZ

1.3 V

1.3 V

t

1.3 V1.3 V

1.3 V1.3 V

FOR OPEN-COLLECTOR OUTPUTS

h

t

PLZ

LOAD CIRCUIT

3.5 V

0.3 V

3.5 V

0.3 V

3.5 V

0.3 V

[

3.5 V

V

OL

0.3 V

V

OH

0.3 V

[

0 V

High-Level

Low-Level

Out-of-Phase

(see Note C)

Pulse

Pulse

Input

In-Phase

Output

Output

LOAD CIRCUIT

FOR 3-STATE OUTPUTS

1.3 V 1.3 V

t

w

1.3 V 1.3 V

VOLTAGE WAVEFORMS

PULSE DURATIONS

1.3 V 1.3 V

t

PLH

t

PHL

1.3 V 1.3 V

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

1.3 V1.3 V

t

PHL

t

PLH

3.5 V

0.3 V

3.5 V

0.3 V

3.5 V

0.3 V

V

V

V

V

OH

OL

OH

OL

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. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%.
E. The outputs are measured one at a time with one transition per measurement.

Figure 1. Load Circuits and Voltage Waveforms

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5

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Copyright  1998, Texas Instruments Incorporated