DM74ALS390 - Dual 4-Bit Decade Counters

National Semiconductor

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Datasheet Details

Part number	DM74ALS390
Manufacturer	National Semiconductor
File Size	117.64 KB
Description	Dual 4-Bit Decade Counters
Datasheet	DM74ALS390_NationalSemiconductor.pdf

DM74ALS390 Product details

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 are as described in the appropriate truth table A symmetrical divide-by-ten count can be obtained by connecting the QD output to the A input and applying the input count to the B input

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.

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Published: Feb 10, 2014 |