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參數資料
| 型號： | MC74HC646N |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal 3-State Bus Transeceivers and D Flip-Flops |
| 中文描述： | HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數： | 7/14頁 |
| 文件大小： | 328K |
| 代理商： | MC74HC646N |
MC54/74HC646
High–Speed CMOS Logic Data
DL129 — Rev 6
3–7
MOTOROLA
TIMING DIAGRAMS AND SWITCHING DIAGRAMS — HC646
90%
50%
10%
Figure 1. A Data Port = Input, B Data Port = Output
tr
tf
VCC
GND
Figure 2. A Data Port = Output, B Data Port = Input
NOTE:
= Don’t Care State
OUTPUT ENABLE
DIRECTION
A–TO–B SOURCE
B–TO–A SOURCE
A DATA PORT
B DATA PORT
OUTPUT ENABLE
DIRECTION
B–TO–A SOURCE
A–TO–B SOURCE
B DATA PORT
A DATA PORT
VCC
GND
VCC
GND
VCC
GND
VCC
GND
VCC
GND
VCC
GND
VCC
GND
VCC
GND
VCC
GND
10%
90%
tTLH
tTHL
tPLH
tPHL
90%
50%
10%
50%
tr
tf
tPLH
tPHL
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