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7493 - Decade and Binary Counters

General Description

Each of these monolithic counters contains four master-slave flip-flops and additional gating to provide a divide-by-two counter and a three-stage binary counter for which the count cycle length is divide-by-five for the 90A and divide-by-eight for the 93A.

Key Features

  • n Typical power dissipation.
  • 90A 145 mW.
  • 93A 130 mW n Count frequency 42 MHz Connection Diagrams Dual-In-Line Package Dual-In-Line Package DS006533-1 Order Number DM5490J, DM5490W or DM7490AN See Package Number J14A, N14A or W14B DS006533-2 Order Number DM7493AN See Package Number N14A © 1998 Fairchild Semiconductor Corporation DS006533 www. fairchildsemi. com Absolute Maximum Ratings (Note 1) Supply Voltage Input Voltage Operating Free Air Temperature Range 7V 5.5V DM.

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Full PDF Text Transcription (Reference)

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DM7490A, DM7493A Decade and Binary Counters March 1998 DM7490A, DM7493A Decade and Binary Counters General Description Each of these monolithic counters contains four master-slave flip-flops and additional gating to provide a divide-by-two counter and a three-stage binary counter for which the count cycle length is divide-by-five for the 90A and divide-by-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.