MM54HC190J NSC [National Semiconductor], MM54HC190J Datasheet - Page 7

• Manufacturer Part Number: MM54HC190J
• Description: MM54HC190/MM74HC190 Synchronous Decade Up/Down Counters with Mode Control MM54HC191/MM74HC191 Synchronous Binary Up/Down Counters with Mode Control
• Manufacturer: NSC [National Semiconductor]

Timing Diagrams
’HC190 Synchronous Decade Counters
Typical Load Count and Inhibit Sequences
TL F 5322 – 4
Sequence
(1) Load (preset) to BCD seven
(2) Count up to eight nine zero one and two
(3) Inhibit
(4) Count down to one zero nine eight and seven
’HC191 Synchronous Binary Counters
Typical Load Count and Inhibit Sequence
TL F 5322 – 5
Sequence
(1) Load (preset) to binary thirteen
(2) Count up to fourteen fifteen zero one and two
(3) Inhibit
(4) Count down to one zero fifteen fourteen and thirteen
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