HD74HC390 counters equivalent, dual decade counters.
* High Speed Operation: tpd (Clock A to QA) = 11 ns typ (CL = 50 pF)
* High Output Current: Fanout of 10 LSTTL Loads
* Wide Operating Voltage: VCC = 2 to 6 .
The HD74HC390 incorporate dual decade counters, each composed of a divide-by-two and a divide-by-five counter. The divide-by-two and divide-by-five counters can be cascaded to form dual decade, dual bi-quinary, or various combinations up to a single .
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