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DM5490 - Decade and Binary Counters

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 90A and divideby-eight for the 93A All of these counters have a gated zero reset

Features

  • Y Y Typical power dissipation 90A 145 mW 93A 130 mW Count frequency 42 MHz Connection Diagrams Dual-In-Line Package TL F 6533.
  • 1 Order Number DM5490J DM5490W or DM7490AN See NS Package Number J14A N14A or W14B Dual-In-Line Package TL F 6533.
  • 2 Order Number DM7493AN See NS Package Number N14A C1995 National Semiconductor Corporation TL F 6533 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note) If Military Aerospace specified devices are required please contac.

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Datasheet Details

Part number DM5490
Manufacturer National Semiconductor
File Size 133.71 KB
Description Decade and Binary Counters
Datasheet download datasheet DM5490 Datasheet
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Full PDF Text Transcription

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DM5490 DM7490A DM7493A Decade and Binary Counters July 1992 DM5490 DM7490A DM7493A 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 90A and divideby-eight for the 93A All of these counters have a gated zero reset and the 90A 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 A symmetrical divide-by-ten count can be obtained from the 90A
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