Texas Instruments SN74ALS244CN Bedienungsanleitung

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SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SDAS142C – JULY 1987 – REVISED AUGUST 1995

Copyright  1995, Texas Instruments Incorporated

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

•3-State Outputs Drive Bus Lines or Buer

Memory Address Registers

•pnp Inputs Reduce dc Loading

•Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic

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

and Ceramic (J) 300-mil DIPs

description

These octal buers and line drivers are designed

specically to improve the performance and

density of 3-state memory address drivers, clock

drivers, and bus-oriented receivers and

transmitters. With the ALS240A, ALS241C,′ ′

′AS240A, and ′AS241A, these devices provide the

choice of selected combinations of inverting

outputs, symmetrical active-low output-enable

(OE) inputs, and complementary OE and OE

inputs.

The -1 version of SN74ALS244C is identical to the

standard version, except that the recommended

maximum IOLfor the -1 version is 48 mA. There is

no -1 version of the SN54ALS244C.

The SN54ALS244C and SN54AS244A are

characterized for operation over the full military

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

SN74ALS244C and SN74AS244A are

characterized for operation from 0°C to 70C.°

FUNCTION TABLE

(each buer)

INPUTS OUTPUT

OE AY

L HH

L LL

H XZ

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

VCC

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

SN54ALS244C, SN54AS244A . . . J PACKAGE

SN74ALS244C, SN74AS244A . . . DW OR N PACKAGE

(TOP VIEW)

3 2 12019

910 11 1213

4

5

6

7

8

18

17

16

15

14

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54ALS244C, SN54AS244A . . . FK PACKAGE

(TOP VIEW)

2Y4

1A1

1OE

1Y4

2A2 2OE

2Y1

GND

2A1 V

CC

PRODUCTION DATA information is current as of publication date.

Products conform to specications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Produktspezifikationen