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SN74LS669

Motorola
Part Number SN74LS669
Manufacturer Motorola
Description SYNCHRONOUS 4-BIT UP/DOWN COUNTER
Published Jan 9, 2017
Detailed Description SYNCHRONOUS 4-BIT UP/DOWN COUNTER SN54/74LS669 The SN54 / 74LS669 is a synchronous 4-bit up/down counter. The LS669 is...
Datasheet PDF File SN74LS669 PDF File

SN74LS669
SN74LS669

Overview
SYNCHRONOUS 4-BIT UP/DOWN COUNTER SN54/74LS669 The SN54 / 74LS669 is a synchronous 4-bit up/down counter.
The LS669 is a 4-bit binary counter.
For high speed counting applications, this presettable counter features an internal carry lookahead for cascading purposes.
By clocking all flip-flops simultaneously so the outputs change coincident with each other (when instructed to do so by the count enable inputs and internal gating) synchronous operation is provided.
This helps to eliminate output counting spikes, normally associated with asynchronous (ripple-clock) counters.
The four master-slave flip-flops are triggered on the rising (positive-going) edge of the clock waveform by a buffered c...


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