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Binary to BCD converter

Anonymous
Anonymous
Guru 17045 points

Does anyone have a logic diagram for a 4-bit binary to 5-bit BCD converter (preferably expandable)?

  • 0
    TI__Guru* 96947 points
    Hi Andy,
    We have BCD to 7-segment and BCD to decimal decoders, but I'm afraid I don't know of any 4-bit binary to 5-bit BCD converters.

    I would entrust this job to a low cost microcontroller since it's easy to program and doesn't require a lot of pins.
  • Anonymous
    0 Anonymous in reply to Emrys Maier
    Guru 17045 points

    I found a way to use a SN74xx283 binary full adder chip to do this by applying the binary to one of the sets (A or B)of inputs and hardwire a binary 6 (0110) to the other set of inputs and connect the carry in to logic 0 and take the five bit BCD across the S0-S3 and carry output; I think adding more bits would be relatively easy by using the carry out of the initial '283 and use that for the carry in of the other '283s and otherwise wiring them the same way except the binary inputs may need to go to more than one '283 for the bits higher than the initial 4 bits.