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DM74LS169A - Synchronous 4-Bit Up/Down Binary Counter

General Description

This synchronous presettable counter

Key Features

  • an internal carry look-ahead for cascading in high-speed counting.

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📁 Similar Datasheet

Part Number Description Manufacturer
DM74LS169A Synchronous 4-Bit Up/Down Binary Counter National Semiconductor
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Other Datasheets by Fairchild (now onsemi)

Part Number Description
DM74LS161A Synchronous 4-Bit Binary Counters
DM74LS163A Synchronous 4-Bit Binary Counters
DM74LS164 8-Bit Serial In/Parallel Out Shift Register
DM74LS165 8-Bit Parallel In/Serial Output Shift Registers
DM74LS166 8-Bit Parallel-In/Serial-Out Shift Register

Full PDF Text Transcription (Reference)

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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.