Description
Each of these monolithic counters contains eight masterslave flip-flops and additional gating to implement two independent four bit counters in a single package To use their maximum count length the B input is connected to the QA output The input count pulses are applied to input A and the outputs a
Features
- Y Y
Y
Y
Y
Switching specifications at 50 pF Switching specifications guaranteed over full temperature and VCC range Advanced oxide-isolated ion-implanted Schottky TTL process Individual clocks for A and B flip-flops provide dual divide-by-2 and divide-by-5 counters Direct clear for each 4-bit counter
Connection Diagram
Function Tables
BCD Count Sequence (See Note 2) Count QD 0 1 2 3 4 5
TL F 9169.
- 1
Output QC L L L L H H H H L L QB L L H H L L H H L L QA L H L H L H L H L H L L L.
DM74ALS390 Datasheet
