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DM74LS90 - Decade and Binary Counters

General Description

Each of these monolithic counters contains four masterslave flip-flops and additional gating to provide a divide-bytwo counter and a three-stage binary counter for which the count cycle length is divide-by-five for the DM74LS90.

Key Features

  • s Typical power dissipation 45 mW s Count frequency 42 MHz Ordering Code: Order Number Package Number Package.

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📁 Similar Datasheet

Part Number Description Manufacturer
DM74LS90 Decade and Binary Counters National
DM74LS90M Decade and Binary Counters National Semiconductor
DM74LS90N Decade and Binary Counters National Semiconductor
DM74LS93 Decade and Binary Counters National
DM74LS93M Decade and Binary Counters National Semiconductor

Other Datasheets by Fairchild (now onsemi)

Part Number Description
DM74LS90M Decade and Binary Counters
DM74LS90N Decade and Binary Counters
DM74LS93 Decade and Binary Counters
DM74LS93M Decade and Binary Counters
DM74LS93N Decade and Binary Counters

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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DM74LS90 Decade and Binary Counters August 1986 Revised March 2000 DM74LS90 Decade and Binary Counters General Description Each of these monolithic counters contains four masterslave flip-flops and additional gating to provide a divide-bytwo counter and a three-stage binary counter for which the count cycle length is divide-by-five for the DM74LS90. All of these counters have a gated zero reset and the DM74LS90 also has gated set-to-nine inputs for use in BCD nine’s complement applications. To use their maximum count length (decade or four bit binary), the B input is connected to the QA output. The input count pulses are applied to input A and the outputs are as described in the appropriate truth table.