74hct4520 NXP Semiconductors, 74hct4520 Datasheet - Page 4

• Manufacturer Part Number: 74hct4520
• Description: Dual 4-bit Synchronous Binary Counter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
December 1990
Dual 4-bit synchronous binary counter
Fig.4 Functional diagram.
Fig.5 Logic diagram (one counter).
Fig.6 Timing diagram.
4
FUNCTION TABLE
Notes
1. H = HIGH voltage level
L
X
H
X
nCP
L = LOW voltage level
X = don’t care
= LOW-to-HIGH clock transition
= HIGH-to-LOW clock transition
0
H
X
L
X
nCP
1
L
L
L
L
L
L
H
MR
MODE
counter advances
counter advances
no change
no change
no change
no change
Q
0
to Q
74HC/HCT4520
3
= LOW
Product specification