HCC4520B STMICROELECTRONICS [STMicroelectronics], HCC4520B Datasheet - Page 4

• Manufacturer Part Number: HCC4520B
• Description: DUAL UP-COUNTERS
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

HCC/HCF4518B/4520B
TRUTH TABLE
X = Don’t Care
TIMING DIAGRAM
4/14
Clock Enable Reset
–
–
–
X
X
0
1
\ –
– /
– /
– \
– \
–
X
X
1
0
– /
–
–
Logic 1 = High State
0
0
0
0
0
0
1
Increment Counter
Increment Counter
Q1 Thru Q4 = 0
No Change
No Change
No Change
No Change
Action
Logic 0 = Low