Datasheet 74als257 DATASHEETS (Philips)

INTEGRATED CIRCUITS

74ALS257/74ALS258

Data selector/multiplexer

Product specification IC05 Data Handbook

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1991 Feb 08

Philips Semiconductors Product specification

74ALS257/74ALS258Data selector/multiplexer

74ALS257 Quad 2-input data selector, non-inverting (3-State) 74ALS258 Quad 2-input data selector, inverting (3-State)

DESCRIPTION

The 74ALS257 is a quad 2-input multiplexer which selects 4 bits of data from one of two sources under the control of a common select input (S). The output enable input (OE OE

is High, all of the outputs (Yn) are forced to a High impedance

state (3-State) regardless of all other input conditions. Moving data from two registers to a common output bus is a typical

use of the 74ALS257. The state of the select input determines the particular register from which data comes.

The device is the logic implementation of 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the select input. The 74ALS258 is similar but has inverting outputs (Y

n).

) is active when Low. When

TYPE

74ALS257 7.0ns 7mA 74ALS258 7.0ns 7mA

ORDERING INFORMATION

DESCRIPTION COMMERCIAL RANGE

16-pin plastic DIP 74ALS257N, 74ALS258 SOT38-4

TYPICAL

PROPAGATION DELAY

ORDER CODE

V

= 5V ±10%,

CC

T

= 0°C to +70°C

amb

SUPPLY CURRENT

16-pin plastic SO 74ALS257D, 74ALS258D SOT109-1

16-pin plastic SSOP

Type II

74ALS257DB, 74ALS258DB SOT338-1

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS DESCRIPTION

74ALS (U.L.)

HIGH/LOW

Ina, Inb, Inc, Ind Data inputs 1.0/1.0 20µA/0.1mA

S Select input 1.0/1.0 20µA/0.1mA

OE Enable input 1.0/1.0 20µA/0.1mA

Ya – Yd, Ya – Yd Data outputs 20/240 0.4mA/24mA

NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.

LOAD VALUE

HIGH/LOW

TYPICAL

(TOTAL)

DRAWING

NUMBER

PIN CONFIGURATION – 74ALS257

16 15 14 13 12 11 107

98GND Yc

I0a I1a

I0b I1b

1

S

2 3 4

Ya

5 6

Yb

V OE I0d

I1d Yd I0c I1c

PIN CONFIGURATION – 74ALS258

1 I0a I1a

I0b I1b

S

2

3

4

Y

a

5

6

Y

b

CC

SF00673

16 15 14 13 12 11 107

98GND Yc

V OE I0d

I1d Yd I0c I1c

CC

SC00079

1991 Feb 08 853–1 130 01670

2

Philips Semiconductors Product specification

74ALS257/74ALS258Data selector/multiplexer

LOGIC SYMBOL – 74ALS257

2356111014

I0a I1a I0b I1b I0c I1c I0d

1

15

VCC = Pin 16 GND = Pin 8

S OE

Ya Yb Yc Yd

47912

IEC/IEEE SYMBOL – 74ALS257

15 1

2 3

5 6

10 11

13 14

EN G1

1 1

MUX

I1d

LOGIC SYMBOL – 74ALS258

13

1

15

VCC = Pin 16

SF00674

GND = Pin 8

2356111014

I0a I1a I0b I1b I0c I1c I0d S OE

Ya Yb Yc Yd

47912

13

I1d

SC00080

IEC/IEEE SYMBOL – 74ALS258

15 1

4

7

9

12

SF00675

2 3

5 6

10 11

13 14

EN G1

1 1

MUX

4

7

9

12

SC00081

LOGIC DIAGRAM – 74ALS257

OE I0a I1a I0b I1b I0c I1c I0d I1d S

152356111014131

V

= Pin 16

CC

GND = Pin 8

47912

Ya Yb Yc Yd

SC00082

LOGIC DIAGRAM – 74ALS258

OE I0a I1a I0b I1b I0c I1c I0d I1d S

152356111014131

V

= Pin 16

CC

GND = Pin 8

47912

aYbYcYd

Y

SC00083

1991 Feb 08

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Philips Semiconductors Product specification

SYMBOL

PARAMETER

UNIT

74ALS257/74ALS258Data selector/multiplexer

FUNCTION T ABLE – 74ALS257

FUNCTION T ABLE – 74ALS258

INPUTS OUTPUT

OE S I0n I1n Yn

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

H = High voltage level L = Low voltage level X = Don’t care Z = High impedance “off” state

OE S I0n I1n Yn

H X X X Z

L L L X H L L H X L L H X L H L H X H L

H = High voltage level L = Low voltage level X = Don’t care Z = High impedance “off” state

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free air temperature range.)

SYMBOL

V

CC

V

IN

I

IN

V

OUT

I

OUT

T

amb

T

stg

Supply voltage –0.5 to +7.0 V Input voltage –0.5 to +7.0 V Input current –30 to +5 mA Voltage applied to output in High output state –0.5 to V Current applied to output in Low output state 48 mA Operating free-air temperature range 0 to +70 °C Storage temperature range –65 to +150 °C

PARAMETER RATING UNIT

INPUTS OUTPUT

CC

V

RECOMMENDED OPERATING CONDITIONS

T

V

V V

I I

CC

I

IK OH OL

amb

Supply voltage 4.5 5.0 5.5 V High-level input voltage 2.0 V

IH

Low-level input voltage 0.8 V

IL

Input clamp current –18 mA High-level output current –2.6 mA Low-level output current 24 mA Operating free-air temperature range 0 +70 °C

LIMITS

MIN NOM MAX

1991 Feb 08

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Philips Semiconductors Product specification

SYMBOL

PARAMETER

TEST CONDITIONS

1

UNIT

VOHHigh-level output voltage

CC

,

IL

,

VOLLow-level output voltage

CC

,

IL

,

ICCSupply current (total)

74ALS257/74ALS258Data selector/multiplexer

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)

LIMITS

MIN TYP2MAX

IOH = –0.4mA V

IOH = MAX 2.4 3.2 V

I

= 12mA 0.25 0.40 V

OL

I

= 24mA 0.35 0.50 V

OL

V

I

OZH

I

OZL

I

p

Input clamp voltage VCC = MIN, II = I

IK

I

IH

Input current at maximum input voltage VCC = MAX, VI = 7.0V 0.1 mA

I

High-level input current VCC = MAX, VI = 2.7V 20 µA Low-level input current VCC = MAX, VI = 0.4V –0.1 mA

IL

Off-state output current, High-level voltage applied

Off-state output current, Low-level voltage applied

O

Output current

3

74ALS257

pp

74ALS258

VCC = ±10%, VIL = MAX, VIH = MIN

VCC = MIN, VIL = MAX, VIH = MIN

IK

VCC = MAX, VI = 2.7V 20 µA

VCC = MAX, VI = 0.4V –20 µA VCC = MAX, VO = 2.25V –30 –112 mA

I

CCH

I

VCC = MAX

CCL

I

CCZ

I

CCH

I

VCC = MAX

CCL

I

CCZ

NOTES:

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

2. All typical values are at V

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

= 5V, T

CC

amb

= 25°C.

– 2 V

CC

–0.73 –1.5 V

3 6 mA 8 12 mA 9 14 mA

2.5 4 mA 7 11 mA 9 13 mA

OS

.

1991 Feb 08

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Philips Semiconductors Product specification

74ALS257

74ALS258

74ALS257/74ALS258Data selector/multiplexer

AC ELECTRICAL CHARACTERISTICS

LIMITS

T

= 0°C to +70°C

amb

V

SYMBOL PARAMETER TEST CONDITION

t

PLH

t

PHL

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

t

PLH

t

PHL

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

Propagation delay I0n or I1n to Yn

Propagation delay S to Yn

Output enable time OE

to Yn

Output disable time OE

to Yn

Propagation delay I0n or I1n to Y

n

Propagation delay S to Y

n

Output enable time OE

to Yn

Output disable time OE

to Yn

Waveform 1

Waveform 1, 2

Waveform 3 Waveform 4

Waveform 1

Waveform 1, 2

Waveform 3 Waveform 4

= +5.0V ± 10%

CC

C

= 50pF, RL = 500Ω

L

MIN MAX

2.0

4.0

3.0

4.0

12.0

11.0

12.0

2.0

5.0

12.0

2.0

4.0

3.0

4.0

12.0

11.0

12.0

2.0

5.0

12.0

9.0

8.0

9.0

UNIT

ns

AC WAVEFORMS

For all waveforms, VM = 1.3V.

I0n, I1n, S

Yn, Y

n

Waveform 1. Propagation Delay for Data and

OE

Yn, Yn

Waveform 3. 3-State Output Enable Time to High Level

and Output Disable Time from High Level

V

M

t

PLH

Select to Outputs

V

M

t

PZH

V

M

V

M

t

PHL

V

M

V

M

t

PHZ

SC00059

VOH -0.3V

SC00084

I0n, I1n, S

Yn, Y

n

V

M

t

PHL

V

M

t

PLH

V

M

SC00060

Waveform 2. Propagation Delay for Data and

Select to Outputs

OEn

n

Yn, Y

0V

V

M

t

PZL

V

M

t

PLZ

V

M

V

OL

3.5V

+0.3V

SC00085

Waveform 4. 3-State Output Enable Time to Low Level

and Output Disable Time from Low Level

1991 Feb 08

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Philips Semiconductors Product specification

74ALS257/74ALS258Data selector/multiplexer

TEST CIRCUIT AND WAVEFORMS

V

CC

PULSE

GENERATOR

V

IN

R

T

D.U.T.

V

OUT

R

L

C

R

L

Test Circuit for 3-State Outputs

SWITCH POSITION

TEST SWITCH

t

PLZ

, t

PZL

closed

All other open

DEFINITIONS:

R

= Load resistor;

L

see AC electrical characteristics for value.

= Load capacitance includes jig and probe capacitance;

C

L

see AC electrical characteristics for value.

R

= Termination resistance should be equal to Z

T

pulse generators.

OUT

7.0V

of

NEGATIVE PULSE

POSITIVE PULSE

Family

74ALS

90%

10%

Amplitude

t

w

V

M

10%

)

V

90%

M

t

THL (tf

t

TLH (tr

f

)

t

TLH (tr

t

THL (tf

t

w

Input Pulse Definition

INPUT PULSE REQUIREMENTS

V

Rep.Rate

M

3.5V

1.3V

1MHz

V

10%

)

90%

t

w

500ns

M

V

M

t

TLHtTHL

2.0ns 2.0ns

90%

10%

AMP (V)

0.3V

AMP (V)

0.3V

SC00072

1991 Feb 08

7

Philips Semiconductors Product specification

74ALS257/74ALS258Data selector/multiplexer

DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4

1991 Feb 08

8

Philips Semiconductors Product specification

74ALS257/74ALS258Data selector/multiplexer

SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

1991 Feb 08

9

Philips Semiconductors Product specification

74ALS257/74ALS258Data selector/multiplexer

SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1

1991 Feb 08

10

Philips Semiconductors Product specification

74ALS257/74ALS258Data selector/multiplexer

DEFINITIONS

Data Sheet Identification Product Status Definition

Objective Specification

Preliminary Specification

Product Specification

Formative or in Design

Preproduction Product

Full Production

Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification.

LIFE SUPPORT APPLICA TIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected

to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.

Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381

This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.

This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product.

 Copyright Philips Electronics North America Corporation 1997

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1991 Feb 08

11