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74161A - Synchronous 4-Bit Binary Counters

Download the 74161A datasheet PDF. This datasheet also covers the 74163A variant, as both devices belong to the same synchronous 4-bit binary counters family and are provided as variant models within a single manufacturer datasheet.

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.

Key Features

  • s Synchronously programmable s Internal look-ahead for fast counting s Carry output for n-bit cascading s Synchronous counting s Load control line s Diode-clamped inputs s Typical propagation time, clock to Q output 14 ns s Typical clock frequency 32 MHz s Typical power dissipation 93 mW Ordering Code: Order Number Package Number Package.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (74163A-FairchildSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
74161 4-bit binary synchronous counter ETC
74161 SYNCHRONOUS PRESETTABLE 4-BIT COUNTER SGS-THOMSON
74161 SYNCHRONOUS 4-BIT COUNTERS Texas Instruments
7416 Hex Inverting Buffers National Semiconductor
7416 HEX INVERTER BUFFERS/DRIVERS Texas Instruments

Other Datasheets by Fairchild (now onsemi)

Part Number Description
74163 Synchronous Presettable Binary Counter
74163A Synchronous 4-Bit Binary Counters
7411 Triple 3 Input AND Gate
7412 Triple 3-Input NAND Gate
74121 Monostable multivibrator

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
DM74LS161A • DM74LS163A Synchronous 4-Bit Binary Counters August 1986 Revised April 2000 DM74LS161A • DM74LS163A Synchronous 4-Bit Binary Counters 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.