ꢀꢁ ꢂꢃ ꢄꢅ ꢀ ꢆꢇ ꢈ ꢉ ꢊꢀ ꢁꢂ ꢃꢄ ꢅꢀ ꢋꢈ ꢆꢇ ꢆ
ꢆ ꢌꢍꢎ ꢏꢊ ꢐꢎꢄ ꢑꢁꢒ ꢀ ꢏꢎ ꢓꢀꢔ ꢕꢎꢕ ꢖꢅ ꢎꢁ ꢖꢊꢗꢖ ꢑ ꢎꢀ ꢏꢖ ꢗ ꢀ
ꢘ
ꢘ
SDAS105A − JANUARY 1986 − REVISED OCTOBER 1986
• High-Speed 8-Bit Parallel Pipeline Register
• Serial Shadow Register With Right-Shift Only
SN74ALS819 . . . DW OR JT PACKAGE
(TOP VIEW)
PE
SRCLK
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
V
CC
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
• ’ALS29818 Performs Parallel-to-Serial and
MODE
Serial-to-Parallel Conversion
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
• Designed Specifically for Use in Applications
Such As:
Write Control Store (’ALS29818)
Serial Shadow-Register Diagnostics
• ’ALS819 Provides Even-Parity Output
DQ7 10
SDI
GND
11
12
SDO
ORCLK
• Low Power Dissipation . . . 215 mW Typical
• ’ALS29818 is Functionally Equivalent to AMD
SN74ALS819 . . . FN PACKAGE
(TOP VIEW)
AM29818
• Package Options include Plastic Small Outline
Packages, Standard Plastic DIPs, and Plastic
Chip Carriers
4 3 2 1 28 27 26
Y1
Y2
Y3
NC
Y4
Y5
5
6
7
8
9
10
11
DQ1
DQ2
DQ3
NC
DQ4
DQ5
DQ6
25
24
23
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.
22
21
20
19 Y6
12 1314 1516 1718
The output registers of the ’ALS819 and
’ALS29818 are loaded in parallel from either the
I/O port (DQ0ā−āDQ7) or the shadow register. The
shadow register of the ’ALS2981A 8 can be
loaded serially or from either the I/O port (Y0ā−āY7)
or the pipeline register. The ’ALS819 shadow
register can be loaded serially or from the I/O port
(DQ0ā−āDQ7). 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.
SN74ALS29818 . . . DW OR NT PACKAGE
(TOP VIEW)
OEY
SRCLK
DQ0
V
CC
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
MODE
Y0
DQ1
Y1
DQ2
Y2
DQ3
Y3
DQ4
Y4
DQ5
Y5
DQ6
Y6
DQ7 10
SDI 11
Y7
SDO
ORCLK
12
GND
The SN74ALS819 and SN74ALS29818 are
characterized for operation from 0°C to 70°C.
SN74ALS29818 . . . FN PACKAGE
(TOP VIEW)
4
3
2 1 28 27 26
25
5
6
7
8
9
Y1
Y2
Y3
NC
Y4
Y5
DQ1
DQ2
DQ3
NC
DQ4
DQ5
DQ6
24
23
22
21
20
10
11
19 Y6
12 13 14 1516 1718
NC − No internal connection
ꢕ
ꢕ
ꢗ
ꢒ
ꢩ
ꢐ
ꢤ
ꢙ
ꢓ
ꢢ
ꢏ
ꢣ
ꢎ
ꢝ
ꢒ
ꢛ
ꢁ
ꢜ
ꢐ
ꢄ
ꢏ
ꢄ
ꢚ
ꢛ
ꢥ
ꢜ
ꢝ
ꢣ
ꢞ
ꢟ
ꢠ
ꢠ
ꢡ
ꢡ
ꢚ
ꢚ
ꢝ
ꢝ
ꢛ
ꢛ
ꢚ
ꢢ
ꢢ
ꢦ
ꢣ
ꢤ
ꢞ
ꢞ
ꢥ
ꢥ
ꢛ
ꢡ
ꢠ
ꢟ
ꢢ
ꢢ
ꢝ
ꢜ
ꢦ
ꢏꢥ
ꢤ
ꢧ
ꢢ
ꢨ
ꢚ
ꢣ
ꢠ
ꢢ
ꢡ
ꢚ
ꢡ
ꢝ
ꢞ
ꢛ
ꢤ
ꢩ
ꢠ
ꢛ
ꢡ
ꢡ
ꢥ
ꢢ
ꢪ
Copyright 1986, Texas Instruments Incorporated
ꢞ
ꢝ
ꢣ
ꢡ
ꢝ
ꢞ
ꢟ
ꢡ
ꢝ
ꢢ
ꢦ
ꢚ
ꢜ
ꢚ
ꢣ
ꢥ
ꢞ
ꢡ
ꢫ
ꢡ
ꢥ
ꢞ
ꢝ
ꢜ
ꢬ
ꢠ
ꢎ
ꢛ
ꢟ
ꢥ
ꢢ
ꢡ
ꢠ
ꢛ
ꢩ
ꢠ
ꢞ
ꢩ
ꢭ
ꢠ
ꢡ ꢥ ꢢ ꢡꢚ ꢛꢯ ꢝꢜ ꢠ ꢨꢨ ꢦꢠ ꢞ ꢠ ꢟ ꢥ ꢡ ꢥ ꢞ ꢢ ꢪ
ꢞ
ꢞ
ꢠ
ꢛ
ꢡ
ꢮ
ꢪ
ꢕ
ꢞ
ꢝ
ꢩ
ꢤ
ꢣ
ꢡ
ꢚ
ꢝ
ꢛ
ꢦ
ꢞ
ꢝ
ꢣ
ꢥ
ꢢ
ꢢ
ꢚ
ꢛ
ꢯ
ꢩ
ꢝ
ꢥ
ꢢ
ꢛ
ꢝ
ꢡ
ꢛ
ꢥ
ꢣ
ꢥ
ꢢ
ꢢ
ꢠ
ꢞ
ꢚ
ꢨ
ꢮ
ꢚ
ꢛ
ꢣ
ꢨ
ꢤ
ꢩ
ꢥ
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001