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DM74LS197

Part Number	DM74LS197
Manufacturer	National Semiconductor
Description	Presettable Binary Counters
Published	Nov 17, 2005
Detailed Description	DM74LS197 Presettable Binary Counters February 1992 DM74LS197 Presettable Binary Counters General Description The ’LS1...
Datasheet	DM74LS197 PDF File

Overview

DM74LS197 Presettable Binary Counters February 1992 DM74LS197 Presettable Binary Counters General Description The ’LS197 ripple counter contains divide-by-two and divide-by-eight sections which can be combined to form a modulo-16 binary counter State changes are initiated by the falling edge of the clock The ’LS197 has a Master Reset (MR) input which overrides all other inputs and asynchronously forces all outputs LOW A Parallel Load input (PL) overrides clocked operations and asynchronously loads the data on the Parallel Data inputs (Pn) into the flipflops This preset feature makes the circuit usable as a programmable counter The circuit can also be used as a 4-bit latch loading data from...

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