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SN54ALS191A Datasheet(PDF) 4 Page - Texas Instruments

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Part No. SN54ALS191A
Description  SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54ALS191A Datasheet(HTML) 4 Page - Texas Instruments

   
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SN54ALS191A, SN74ALS191A
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS
SDAS210C – DECEMBER 1982 – REVISED JULY 1996
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
typical load, count, and inhibit sequences
The following sequence is illustrated below:
1.
Load (preset) to binary 13
2.
Count up to 14, 15 (maximum), 0, 1, and 2
3.
Inhibit
4.
Count down to 1, 0 (minimum), 15, 14, and 13
2
A
B
C
D
CLK
D/U
MAX/MIN
QA
QD
QC
QB
Load
Count Up
Inhibit
Count Down
13
14
15
0
1
2
21
0
15
14
13
Data
Inputs
RCO
CTEN
LOAD


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