Texas Instruments SN74ALS157AN Handleiding

Texas Instruments Niet gecategoriseerd SN74ALS157AN

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

SDAS081C − APRIL 1982 − REVISED DECEMBER 1994

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443

•Buffered Inputs and Outputs

•Package Options Include Plastic

Small-Outline (D) Packages, Ceramic Chip

Carriers (FK), and Standard Plastic (N) and

Ceramic (J) 300-mil DIPs

description

These data selectors/multiplexers contain

inverters and drivers to supply full data selection

to the four output gates. A separate strobe (G)

input is provided. A 4-bit word is selected from one

of two sources and is routed to the four outputs.

The ′ALS157A and SN74AS157 present true

data. The ′ALS158 and SN74AS158 present

inverted data to minimize propagation delay time.

The SN54ALS157A and SN54ALS158 are

characterized for operation over the full military

temperature range of −55°C to 125°C. The

SN74ALS157A, SN74ALS158, SN74AS157, and

SN74AS158 are characterized for operation from

0 C.°C to 70°

FUNCTION TABLE

INPUTS OUTPUT Y

A /B

DATA ′

ALS157A

′

ALS158

G A /B A B

ALS157A

SN74AS157

ALS158

SN74AS158

H X X X L H

L L L X L H

L L H X H L

L HH X L L

L H X H H L

SN54ALS157A, SN54ALS158 . . . J PACKAGE

SN74ALS157A, SN74ALS158,

SN74AS157, SN74AS158 ...D OR N PACKAGE

(TOP VIEW)

3 2 1 20 19

9 10 11 12 13

SN54ALS157A, SN54ALS158 . . . FK PACKAGE

(TOP VIEW)

A/B

3B G

GND

NC V

A/B

GND

VCC

NC − No internal connection

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

SDAS081C − APRIL 1982 − REVISED DECEMBER 1994

2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

logic symbols†

MUX

2B 2Y

3B 3Y

4A 13

4B 4Y

A /B

MUX

2A 6

2B 2Y

3A 10

3B 3Y

4B 4Y

A /B

′

ALS157A, SN74AS157

′

ALS158, SN74AS158

†These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

Pin numbers shown are for the D, J, and N packages.

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

SDAS081C − APRIL 1982 − REVISED DECEMBER 1994

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443

logic diagrams (positive logic)

A /B

′

ALS157A

′

ALS158

A/B

SN74AS157 SN74AS158

A /B

Pin numbers shown are for the D, J, and N packages.

Product specificaties

Merk:	Texas Instruments
Categorie:	Niet gecategoriseerd
Model:	SN74ALS157AN
Breedte:	19.69 mm
Diepte:	6.6 mm
Hoogte:	4.57 mm
Breedte verpakking:	13.97 mm
Diepte verpakking:	506 mm
Hoogte verpakking:	11.23 mm
Soort:	Logic IC
Type verpakking:	PDIP
Aantal per verpakking:	25 stuk(s)
Temperatuur bij opslag:	-65 - 150 °C
Bedrijfstemperatuur (T-T):	0 - 70 °C
Aantal pinnen:	16
Breedte (met pennen):	19.69 mm
Diepte (met pennen):	10.92 mm
Hoogte (met pennen):	8.26 mm