CD54HC4520 Datasheet, PDF (2/13 Pages) Texas Instruments – High-Speed CMOS Logic Dual Synchronous Counters

CD74HC4518, CD54HC4520, CD74HC4520, CD74HCT4520
Functional Diagram
1
1CP
1E ²
1MR ⁷
9
2CP
2E ¹⁰
2MR ¹⁵
÷10/÷16
CL
R
3
1Q₀
4
1Q₁
5
1Q₂
6
1Q₃
÷10/÷16
CL
R
11
2Q₀
12
2Q₁
13
2Q₂
14 _2Q3
GND = 8
V_CC = 16
TRUTH TABLE
CP
E
MR
↑
H
L
L
↓
L
↓
X
L
X
↑
L
↑
L
L
H
↓
L
X
X
H
H = High State.
L = Low State.
↑ = High-to-Low Transition.
↓ = Low-to-High Transition.
X = Don’t Care.
OUTPUT STATE
Increment Counter
Increment Counter
No Change
No Change
No Change
No Change
Q₀ thru Q₃ = L
2