SN74ALS29818NT datasheet(1/13 Pages) TI1

Part #	SN74ALS29818NT

Description	8-BIT DIAGNOSTICS/PIPELINE REGISTERS

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SN74ALS819, SN74ALS29818

8BIT DIAGNOSTICS/PIPELINE REGISTERS

SDAS105A − JANUARY 1986 − REVISED OCTOBER 1986

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77001

Copyright

 1986, Texas Instruments Incorporated

1

• High-Speed 8-Bit Parallel Pipeline Register

• Serial Shadow Register With Right-Shift Only

• ’ALS29818 Performs Parallel-to-Serial and

Serial-to-Parallel Conversion

• Designed Specifically for Use in Applications

Such As:

Write Control Store (’ALS29818)

Serial Shadow-Register Diagnostics

• ’ALS819 Provides Even-Parity Output

• Low Power Dissipation ... 215 mW Typical

• ’ALS29818 is Functionally Equivalent to AMD

AM29818

• Package Options include Plastic Small Outline

Packages, Standard Plastic DIPs, and Plastic

Chip Carriers

description

The SN74ALS819 and SN74ALS29818 are 8-bit

pipeline registers each with an on-chip shadow

register. They are for use in applications such as

write control store and shadow register diagnos-

tics.

The output registers of the ’ALS819 and

’ALS29818 are loaded in parallel from either the

I/O port (DQ0 −DQ7) or the shadow register. The

shadow register of the ’ALS2981A 8 can be

loaded serially or from either the I/O port (Y0 −Y7)

or the pipeline register. The ’ALS819 shadow

register can be loaded serially or from the I/O port

(DQ0 −DQ7). In addition, the ’ALS819 provides a

Parity-Even (PE) output, which monitors parity of

the output register. Operation of these devices is

controlled by the Mode and SDI inputs as shown

in the function table.

The SN74ALS819 and SN74ALS29818 are

characterized for operation from 0

°C to 70°C.

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.

4

43

16 17

14

18

15

3

5

6

7

8

9

10

11

13

12

2

PE

SRCLK

DQ0

DQ1

DQ2

DQ3

DQ4

DQ5

DQ6

DQ7

SDI

GND

SN74ALS819 ...DW OR JT PACKAGE

(TOP VIEW)

SN74ALS819 . . . FN PACKAGE

(TOP VIEW)

SN74ALS29818 . . . DW OR NT PACKAGE

(TOP VIEW)

SN74ALS29818 . . . FN PACKAGE

(TOP VIEW)

NC − No internal connection

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

VCC

MODE

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

SDO

ORCLK

1

Y1

Y2

Y3

NC

Y4

Y5

Y6

DQ1

DQ2

DQ3

NC

DQ4

DQ5

DQ6

28 27 26

25

24

23

22

21

20

19

OEY

SRCLK

DQ0

DQ1

DQ2

DQ3

DQ4

DQ5

DQ6

DQ7

SDI

GND

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

VCC

MODE

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

SDO

ORCLK

5

6

7

8

9

10

11

13

12

14

21

Y1

Y2

Y3

NC

Y4

Y5

Y6

DQ1

DQ2

DQ3

NC

DQ4

DQ5

DQ6

15 16 1718

28 27 26

25

24

23

22

21

20

19

Similar Part No. - SN74ALS29818NT

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	SN74ALS29821DW	89Kb / 6P	[Old version datasheet] 10-BIT BUS-INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS
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