參數(shù)資料
型號(hào)： M54HC643B1R
廠商： 意法半導(dǎo)體
英文描述： OCTAL BUS TRANSCEIVER 3-STATE: HC245 NON INVERTING HC640 INVERTING, HC643 INVERTING/NON INVERTING
中文描述： 八路總線收發(fā)器3種狀態(tài)：HC245非反相HC640反轉(zhuǎn)，HC643反向/非反相
文件頁(yè)數(shù)： 2/11頁(yè)
文件大?。?/td> 266K
代理商： M54HC643B1R
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2, 3, 4, 5,
6, 7, 8, 9
18, 17, 16,
15, 14, 13,
12, 11
19
SYMBOL
DIR
A1 to A8
NAME AND FUNCTION
Directional Control
Data Inputs/Outputs
B1 to B8
Data Inputs/Outputs
G
Output Enabel Input
(Active LOW)
Ground (0V)
Positive Supply Voltage
10
20
GND
V
CC
IEC LOGIC SYMBOLS
TRUTH TABLE
INPUT
FUNCTION
OUTPUT
HC640
A = B
B = A
Z
G
L
L
H
DIR
L
H
X
A BUS
OUTPUT
INPUT
Z
B BUS
INPUT
OUTPUT
Z
HC245
A = B
B = A
Z
HC643
A = B
B = A
Z
X: ”H” or ”L”
Z: Highimpedance
HC245
HC640
HC643
M54/M74HC245/640/643
2/11
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