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CD4056B: Looking for a small footprint quad 7-seg LCD display driver

Thomas Bewley
Expert 1030 points
Part Number: CD4056B
Other Parts Discussed in Thread: LP8866-Q1

I need to drive a very small 4-character 7 segment display. www.digikey.com/.../7364561 I’m looking for a small i2c or SPI driver IC that can offload the support of this display from the board’s main MCU. I suppose I could use an MSP430 and program it myself, but does TI have any existing solutions for this sort of problem?

PS - I think I'm looking for something like the NXP PCA8536, but I only need to drive four 7-segment characters (not 40), and I2C only is fine.  Not sure where to look in the TI catalog to find something similar?

PPS - I found several examples online where people have implemented the TM1650 or TM1637 (from a Chinese company, Titan Microelectronics) for this purpose.  Unfortunately, the TM16** ICs apparently need to be bit-banged over a non-standard serial connection, they don't communicate using a proper I2C protocol; I'm looking for something that is standards compliant, as TI might offer...

  • 0
    TI__Guru* 96591 points

    Hey Thomas,

    My product line (Logic and Voltage Translation) doesn't have anything like that -- you might try posting to our LED drivers team (use part # LP8866-Q1 when you post).  I don't know their portfolio, so I'm not sure if they have anything that might be close to what you're looking for.