CD54HC4020 Datasheet, PDF (2/13 Pages) Texas Instruments – High-Speed CMOS Logic 14-Stage Binary Counter

CD54HC4020, CD74HC4020, CD54HCT4020, CD74HCT4020
Functional Diagram
V_CC
16
10
INPUT
PULSES
11
MASTER
RESET
14-STAGE
RIPPLE
COUNTER
8
GND
9
Q1’
7
Q4
5
Q5
4
Q6
6
Q7
13
Q8
12
Q9
14
Q10
15
Q11
1
Q12
2
Q13
3
Q14
BUFFERED
OUTPUTS
TRUTH TABLE
CP COUNT
MR
OUTPUT STATE
↑
L
No Change
↓
L
Advance to Next State
X
H
All Outputs Are Low
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care,
↑ = Transition from Low to High Level, ↓ = Transition from High to Low.
2