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DM74ALS161B - Synchronous Four-Bit Counter

General Description

These synchronous presettable counters feature an internal carry look ahead for application in high speed counting designs.

The DM74ALS162B is a four-bit decade counter, while the DM74ALS161B and DM74ALS163B are four-bit binary counters.

Key Features

  • s Switching specifications at 50 pF s Switching specifications guaranteed over full temperature and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally and pin-for-pin compatible with Schottky and low power Schottky TTL counterpart s Improved AC performance over Schottky and low power Schottky counterparts 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 ESD inpu.

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Other Datasheets by Fairchild (now onsemi)

Part Number Description
DM74ALS162B Synchronous Four-Bit Counter
DM74ALS163B Synchronous Four-Bit Counter
DM74ALS165 8-Bit Parallel In/Serial Out Shift Register
DM74ALS169B Synchronous Four-Bit Up/Down Counters
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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.

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DM74ALS161B • DM74ALS162B • DM74ALS163B Synchronous Four-Bit Counter April 1984 Revised February 2000 DM74ALS161B • DM74ALS162B • DM74ALS163B Synchronous Four-Bit Counter General Description These synchronous presettable counters feature an internal carry look ahead for application in high speed counting designs. The DM74ALS162B is a four-bit decade counter, while the DM74ALS161B and DM74ALS163B are four-bit binary counters. The DM74ALS161B clears asynchronously, while the DM74ALS162B and DM74ALS163B clear synchronously. The carry output is decoded to prevent spikes during normal counting mode of operation.