MM74C90N Fairchild Semiconductor, MM74C90N Datasheet - Page 2

• Manufacturer Part Number: MM74C90N
• Description: IC COUNTER DECADE 4BIT 14-DIP
• Manufacturer: Fairchild Semiconductor
• Series: 74Cr

Specifications of MM74C90N

• Logic Type: Counter, Decade
• Direction: Up
• Number Of Elements: 1
• Number Of Bits Per Element: 4
• Count Rate: 5MHz
• Trigger Type: Negative Edge
• Voltage - Supply: 3 V ~ 15 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 14-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Reset: -
• Timing: -
• Other names: 74C90; 74C90N

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Logic Diagrams
Truth Tables
Output Q
H
L
X
MM74C90 4-Bit Decade Counter BCD Count Sequence
LOW Level
HIGH Level
Irrelevant
A
is connected to Input B for BCD count.
Count
0
1
2
3
4
5
6
7
8
9
Q
H
H
MM74C90
L
L
L
L
L
L
L
L
D
Q
H
H
H
H
L
L
L
L
L
L
Output
C
Q
H
H
H
H
L
L
L
L
L
L
B
Q
H
H
H
H
H
L
L
L
L
L
A
2
MM74C93 4-Bit Binary Counter Binary Count Sequence
Output Q
H
L
X
LOW Level
HIGH Level
Irrelevant
A
is connected to input B for binary count sequence.
Count
10
12
13
14
15
11
0
1
2
3
4
5
6
7
8
9
Q
H
H
H
H
H
H
H
H
MM74C93
L
L
L
L
L
L
L
L
D
Q
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
Output
C
Q
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
B
Q
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
A