M74HC7294B1R 查看數據表（PDF） - STMicroelectronics
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M74HC7294B1R Datasheet PDF : 11 Pages
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M74HC7294
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
4, 5
1, 2, 14, 15
3
11
7
8
16
SYMBOL NAME AND FUNCTION
CLK1, CLK2 Input Clock
A to E Program Inputs
TP
Test Point Outputs
CLR Clear (Active LOW)
Q
Output
GND Ground (0V)
Vcc
Positive Supply Voltage
TRUTH TABLE
CLR
L
H
H
H
H
FUNCTIONAL TABLE
CLK1
X
L
H
X
PROGRAMMING INPUTS
D
C
B
A BINARY
L
L
L
L Inhibit
L
L
L
H Inhibit
L
L
H
L 22
L
L
H
H 23
L
H
L
L 24
L
H
L
H 25
L
H
H
L 26
L
H
H
H 27
H
L
L
L 28
H
L
L
H 29
H
L
H
L 210
H
L
H
H 211
H
H
L
L 212
H
H
L
H 213
H
H
H
L 214
H
H
H
H 215
CLK2
X
L
X
H
Q OUTPUT MODE
CLEARED TO L
UP COUNT
NO CHANGE
FREQUENCY DIVISION
Q
TP
DECIMAL BINARY
Inhibit Inhibit
Inhibit Inhibit
4 29
8 29
16 29
32 29
64 29
128 Disabled Low
256 22
512 23
1.024 24
2.048 25
4.096 26
8.192 27
16.384 28
32.768 29
DECIMAL
Inhibit
Inhibit
512
512
512
512
512
4
8
16
32
64
128
256
512
2/11
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