SN74ALS29818 Datasheet, PDF (1/13 Pages) Texas Instruments – 8-BIT DIAGNOSTICS/PIPELINE REGISTERS

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• 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 (DQ0ā −ā DQ7) or the shadow register. The
shadow register of the ’ALS2981A 8 can be
loaded serially or from either the I/O port (Y0ā −ā Y7)
or the pipeline register. The ’ALS819 shadow
register can be loaded serially or from the I/O port
(DQ0ā −ā 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.
SN74ALS819, SN74ALS29818
8ĆBIT DIAGNOSTICS/PIPELINE REGISTERS
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SDAS105A − JANUARY 1986 − REVISED OCTOBER 1986
SN74ALS819 . . . DW OR JT PACKAGE
(TOP VIEW)
PE ₁
SRCLK ₂
DQ0 3
DQ1 4
DQ2 5
DQ3 6
DQ4 7
DQ5 8
DQ6 9
DQ7 10
SDI 11
GND 12
24 ^VCC
23 ^MODE
22 ^Y0
21 ^Y1
20 ^Y2
19 ^Y3
18 Y4
17 Y5
16 Y6
15 Y7
14 SDO
13 ORCLK
SN74ALS819 . . . FN PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
DQ1 5
25 ^Y1
DQ2 6
24 ^Y2
DQ3 ⁷
23 ^Y3
NC ⁸
22 ^NC
DQ4 ⁹
21 Y4
DQ5 ¹⁰
20 Y5
DQ6 ¹¹
19 Y6
12 13 14 1516 17 18
SN74ALS29818 . . . DW OR NT PACKAGE
(TOP VIEW)
OEY 1
SRCLK 2
DQ0 3
DQ1 4
DQ2 5
DQ3 6
DQ4 7
DQ5 8
DQ6 9
DQ7 10
SDI 11
GND 12
24 ^VCC
23 ^MODE
22 ^Y0
21 Y1
20 Y2
19 Y3
18 Y4
17 Y5
16 Y6
15 Y7
14 SDO
13 ORCLK
SN74ALS29818 . . . FN PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
DQ1 5
25 Y1
DQ2 6
24 Y2
DQ3 7
23 Y3
NC ⁸
22 NC
DQ4 ⁹
21 Y4
DQ5 ¹⁰
20 ^Y5
DQ6 ¹¹
19 Y6
12 13 14 15 16 1718
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.
NC − No internal connection
Copyright  1986, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
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