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參數資料
| 型號： | MC74HC640AN |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal 3-State Inverting Bus Transeceiver |
| 中文描述： | HC/UH SERIES, 8-BIT TRANSCEIVER, INVERTED OUTPUT, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數： | 4/7頁 |
| 文件大小： | 151K |
| 代理商： | MC74HC640AN |
MC54/74HC640A
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
4
SWITCHING WAVEFORMS
Figure 1.
OUTPUT
ENABLE
A OR B
A OR B
50%
50%
50%
90%
10%
tPZL
tPLZ
tPZH
tPHZ
VCC
GND
HIGH
IMPEDANCE
VOL
VOH
HIGH
IMPEDANCE
VCC
GND
50%
Figure 2.
DIRECTION
INPUT
A OR B
OUTPUT
B OR A
VCC
GND
tf
tr
90%
50%
10%
90%
50%
10%
tPHL
tPLH
tTHL
tTLH
tTEST CIRCUITS
* Includes all probe and jig capacitance
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
Figure 3.
* Includes all probe and jig capacitance
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
Figure 4.
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ AND tPZH.
1 k
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