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SN54AS161

Texas Instruments
Part Number SN54AS161
Manufacturer Texas Instruments
Description SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTER
Published Dec 10, 2020
Detailed Description SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163 SN74ALS161B, SN74ALS163B, SN74AS161, SN74AS163 SYNCHRONOUS 4...
Datasheet PDF File SN54AS161 PDF File

SN54AS161
SN54AS161

Overview
SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163 SN74ALS161B, SN74ALS163B, SN74AS161, SN74AS163 SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS SDAS276A – DECEMBER 1994 – REVISED JULY 2000 D Internal Look-Ahead Circuitry for Fast Counting D Carry Output for n-Bit Cascading D Synchronous Counting D Synchronously Programmable D Package Options Include Plastic Small-Outline (D) and Shrink Small-Outline (DB) Packages, Ceramic Chip Carriers (FK), Standard Plastic (N) and Ceramic (J) DIPs description These synchronous, presettable, 4-bit decade and binary counters feature an internal carry look-ahead circuitry for application in high-speed counting designs.
The SN54ALS162B is a 4-bit decade counter.
The ’ALS161B, ’ALS163B, ’AS161, and ’AS163 devices are 4-bit binary counters.
Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincidentally with each other when instructed by the count-enable (ENP, ENT) inputs and internal gating.
This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple-clock) counters.
A buffered clock (CLK) input triggers the four flip-flops on the rising (positive-going) edge of the clock input waveform.
SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163 .
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J PACKAGE SN74ALS161B, SN74AS161, SN74AS163 .
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D OR N PACKAGE SN74ALS163B .
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D, DB, OR N PACKAGE (TOP VIEW) CLR 1 CLK 2 A3 B4 C5 D6 ENP 7 GND 8 16 VCC 15 RCO 14 QA 13 QB 12 QC 11 QD 10 ENT 9 LOAD SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163 .
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FK PACKAGE (TOP VIEW) CLK CLR NC VCC RCO 3 2 1 20 19 A4 18 QA B5 17 QB NC 6 16 NC C7 15 QC D 8 14 9 10 11 12 13 QD ENP GND NC LOAD ENT These counters are fully programmable; they can be preset to any number between 0 and 9 or 15.
Because presetting is synchronous, setting up a low level at the load (LOAD) input disables the counter and causes the outputs to agree with the setup data after t...


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