M74HC294 查看數據表（PDF） - STMicroelectronics
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M74HC294 Datasheet PDF : 11 Pages
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M74HC294
INPUT AND OUTPUT EQUIVALENT CIRCUIT
(TOTEM POLE OUTPUT)
INPUT AND OUTPUT EQUIVALENT CIRCUIT
(OPEN DRAIN OUTPUT)
PIN DESCRIPTION
PIN No
4, 5
1, 2, 14, 15
3
11
7
8
16
TRUTH TABLE
CLR
L
H
H
H
H
SYMBOL
CLK1, CLK2
A to E
TP
CLR
Q
GND
Vcc
NAME AND FUNCTION
Input Clock
Program Inputs
Test Point Outputs
Clear (Active LOW)
Output
Ground (0V)
Positive Supply Voltage
CLK1
X
L
H
X
CLK2
X
L
X
H
Q OUTPUT MODE
CLEARED TO L
UP COUNT
NO CHANGE
2/11
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