參數(shù)資料
型號： SN54HC193FK
廠商： Texas Instruments, Inc.
元件分類： 通用總線功能
英文描述： 4-BIT SYNCHRONOUS UP/DOWN COUNTERS DUAL CLOCK WITH CLEAR
中文描述： 4位同步向上/向下計(jì)數(shù)器雙時(shí)鐘清除
文件頁數(shù)： 4/9頁
文件大?。?/td> 143K
代理商： SN54HC193FK
SN54HC193, SN74HC193
4-BIT SYNCHRONOUS UP/DOWN COUNTERS
(DUAL CLOCK WITH CLEAR)
SCLS122B – DECEMBER 1982 – REVISED MAY 1997
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
typical clear, load, and count sequence
The following sequence is illustrated below:
1.
Clear outputs to 0
2.
Load (preset) to binary 13
3.
Count up to 14, 15, carry, 0, 1, and 2
4.
Count down to 1, 0, borrow, 15, 14, and 13
Data
Inputs
Data
Outputs
LOAD
A
B
C
D
UP
CO
QA
QB
QC
QD
Clear
Count Up
0
13
14
0
1
2
BO
Count Down
15
14
13
DOWN
CLR
15
1
0
Preset
NOTES: A. CLR overrides LOAD, data, and count inputs.
B. When counting up, count-down input must be high; when counting down, count-up input must be high.
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