參數(shù)資料
型號(hào): HD74HC193
廠商: Hitachi,Ltd.
元件分類: 通用總線功能
英文描述: Synchronous Up/Down Decade,4-bit Binary Counter(Dual Clock Line)
中文描述: 同步向上/向下十年,4 -位二進(jìn)制計(jì)數(shù)器(雙時(shí)鐘線)
文件頁(yè)數(shù): 5/13頁(yè)
文件大小: 74K
代理商: HD74HC193
HD74HC192/HD74HC193
5
Timing Chart
HD74HC192
Illustrated below is the following sequence:
1. Clear outputs to zero.
2. Load (preset) to binary seven.
3. Count up to eight, nine, zero, one and two.
4. Count down to one, zero, borrow, nine, eight and seven.
Clear
Load
Carry
Borrow
0
Clear
7
8
9
0
1
2
1
0
9
8
7
Sequence
Illustrated
Count Up
Count Down
Q
A
A
Data
Inputs
B
C
D
Q
B
Q
C
Q
D
Preset
Count Up
Count Down
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