MM74C90 Fairchild, MM74C90 Datasheet - Page 3

• Manufacturer Part Number: MM74C90
• Description: 4-Bit Decade Counter 4-Bit Binary Counter
• Manufacturer: Fairchild

Function Tables
R
H
H
X
X
L
L
X
R
01
H
X
L
01
Inputs
Reset
Reset Inputs
R
H
H
X
X
X
L
L
02
R
H
X
L
02
Reset/Count Function Table
Reset/Count Function Table
R
X
H
X
X
L
L
L
91
Q
R
L
D
X
H
X
X
L
L
L
92
3
Q
H
L
L
Q
D
L
C
Output
Count
Count
Q
L
L
L
C
Output
Count
Count
Count
Count
Q
L
B
Q
L
L
L
B
Q
L
Q
A
H
L
L
A
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