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DM74LS161A Datasheet (PDF) - Fairchild Semiconductor

DM74LS161A Datasheet PDF - Fairchild Semiconductor
Part No. DM74LS161A
Download  DM74LS161A Click to view

File Size   103.03 Kbytes
Page   10 Pages
Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor
Description Synchronous 4-Bit Binary Counters

DM74LS161A Datasheet (PDF)

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DM74LS161A Datasheet PDF - Fairchild Semiconductor

Part No. DM74LS161A
Download  DM74LS161A Click to view

File Size   103.03 Kbytes
Page   10 Pages
Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor
Description Synchronous 4-Bit Binary Counters

DM74LS161A Datasheet (HTML) - Fairchild Semiconductor

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DM74LS161A Product details

General Description

These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed counting designs. The DM74LS161A and DM74LS163A are 4-bit binary counters. The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable inputs and internal gating. This mode of operation eliminates the output counting

spikes which are normally associated with asynchronous (ripple clock) counters. A buffered clock input triggers the four flip-flops on the rising (positive-going) edge of the clock input waveform.



Features

■Synchronously programmable

■Internal look-ahead for fast counting

■Carry output for n-bit cascading

■Synchronous counting

■Load control line

■Diode-clamped inputs

■Typical propagation time, clock to Q output 14 ns

■Typical clock frequency 32 MHz

■Typical power dissipation 93 mW



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