Datasheet Details
Part number:
HD74HC490
Manufacturer:
Hitachi Semiconductor
File Size:
44.31 KB
Description:
Dual 4-bit decade counters.
HD74HC490_HitachiSemiconductor.pdf
Datasheet Details
Part number:
HD74HC490
Manufacturer:
Hitachi Semiconductor
File Size:
44.31 KB
Description:
Dual 4-bit decade counters.
HD74HC490, Dual 4-bit Decade Counters
This circuit contains eight master-slave flip-flops and additional gating to implement two individual 4-bit decade counters.
Each decade counter has individual clock, clear and set-to-9 inputs.
BCD count sequences of any length up to divide-by-100 may be implemented with a single HD74HC490.
Bufferin
HD74HC490 Features
* High Speed Operation: tpd (Clock to QA) = 13 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Funct
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