74LS90 - 4-BIT BINARY COUNTER

  • Model: SN74LS90P-DIP
  • 20 Units in Stock

Rs.48.00

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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 74LS90. All of these counters have a gated zero reset and the
74LS90 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 74LS90 counters by connecting the QD output to the A input and applying the input count to the B input which gives a divide-by-ten square wave at output QA.

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