HD74HC592
Description
The HD74HC592 consists of a parallel input, 8-bit storage register feeding an 8-bit binary counter. Both the register and the counter have individual positive edge-triggered clocks. In addition, the counter has direct load and clear functions. Expansion is easily acplished by connecting RCO of the first stage to the count enable of the second stage, etc.
Features
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- High Speed Operation: tpd (CCK to RCO) = 24 ns typ (CL = 50 p F) 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)
Function Table
Inputs RCK X X CLoad L H H H X X X H H H CCLR H L H H H H H CCKEN X X X X L L H X CCK X X X X Function Regiater data loaded into counter Counter clear Input data A to H stored into register No change in register Count up No count No cont
RCO = QA’- QB’- QC’- QD’- QE’- QF’- QG’- QH’- (CCKEN) (QA’ to QH’: Output of Internal Counter)
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