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74HCT40103D Datasheet(PDF) 4 Page - NXP Semiconductors |
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74HCT40103D Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 17 page 1998 Jul 08 4 Philips Semiconductors Product specification 8-bit synchronous binary down counter 74HC/HCT40103 FUNCTION TABLE Note 1. Clock connected to CP. Synchronous operation: changes occur on the LOW-to-HIGH CP transition. Jam inputs: MSD = P7, LSD = P0. H = HIGH voltage level L = LOW voltage level X = don’t care APPLICATIONS • Divide-by-n counters • Programmable timers • Interrupt timers • Cycle/program counters CONTROL INPUTS PRESET MODE ACTION MR PL PE TE HH H H synchronous inhibit counter H H H L count down H H L X preset on next LOW-to HIGH clock transition HL X X asynchronous preset asynchronously L X X X clear to maximum count Fig.4 Functional diagram. |
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