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Giải thích chi tiết về linh kiện  OCTAL TRANSCEIVER/REGISTER WITH 3-STATE OUTPUTS (NON-INVERTING)
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MC74AC646, MC74ACT646
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PIN ASSIGNMENT
PIN
FUNCTION
A0–A7
Data Register Inputs
Data Register A Outputs
B0–B7
Data Register B Inputs
Data Register B Outputs
CAB, CBA
Clock Pulse Inputs
SAB, SBA
Transmit/Receive Inputs
DIR, G
Output Enable Inputs
Figure 6. Logic Symbol
A0 A1 A2 A3 A4 A5 A6 A7
B0 B1 B2 B3 B4 B5 B6 B7
CAB
SAB
DIR
CBA
SBA
G
1 OF 8 CHANNELS
D0
C0
D0
C0
CAB
SAB
DIR
CBA
SBA
G
B0
A0
TO 7 OTHER CHANNELS
NOTE:
This diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
Figure 7. Logic Diagram
Figure 5. Pinout: 24–Lead Packages Conductors
(Top View)
1
CAB
2
SAB
3
DIR
4
A0
5
A1
6
A2
7
A3
8
A4
9
A5
10
A6
11
A7
12
GND
24
23
22
21
20
19
18
17
16
14
13
VCC CBA SBA G
B0 B1 B2 B3 B4 B5 B6 B7
15


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Mô tả tương tự - MC74AC646

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