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參數資料
| 型號： | MC54HC688J |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-Bit Equality Comparator |
| 中文描述： | HC/UH SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, CDIP20 |
| 封裝： | CERAMIC, DIP-20 |
| 文件頁數： | 4/6頁 |
| 文件大小： | 202K |
| 代理商： | MC54HC688J |
MC54/74HC688
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
4
TYPICAL APPLICATION
Two or more HC688 8–bit Equality Comparators may be cascaded to compare binary or BCD numbers having more than
8 bits. One method of accomplishing this is shown here.
An
Bn
An–1
Bn–1
Ao
Bo
HC688
8 MOST–
SIGNIFICANT
BITS
A = B
OUTPUT
A = B
EXPANDED LOGIC DIAGRAM
CASCADE
INPUT
8 LEAST–
SIGNIFICANT
BITS
A = B
OUTPUT
CASCADE
INPUT
CASCADE
INPUT
CASCADE
INPUT
HC688
HC688
A = B
19
2
4
6
8
11
13
15
17
3
5
7
9
1
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
12
14
16
18
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