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DM74LS169A

Fairchild Semiconductor
Part Number DM74LS169A
Manufacturer Fairchild Semiconductor
Description Synchronous 4-Bit Up/Down Binary Counter
Published Dec 2, 2005
Detailed Description DM74LS169A Synchronous 4-Bit Up/Down Binary Counter April 1998 DM74LS169A Synchronous 4-Bit Up/Down Binary Counter Gen...
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DM74LS169A
DM74LS169A

Overview
DM74LS169A Synchronous 4-Bit Up/Down Binary Counter April 1998 DM74LS169A Synchronous 4-Bit Up/Down Binary Counter General Description This synchronous presettable counter features an internal carry look-ahead for cascading in high-speed counting applications.
Synchronous operation is provided by having all flip-flops clocked simultaneously, so that the outputs all change at the same time when so instructed by the count-enable inputs and internal gating.
This mode of operation helps eliminate the output counting spikes that are normally associated with asynchronous (ripple clock) counters.
A buffered clock input triggers the four master-slave flip-flops on the rising edge of the clock waveform.
This counter is fully programmable; that is, the outputs may each be preset either high or low.
The load input circuitry allows loading with the carry-enable output of cascaded counters.
As loading is synchronous, setting up a low level at the load input disables the counter and causes the out...


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