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  • TI Thinks Resolved

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

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Replies: 1

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Part Number: CD4056B

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...

  • 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.


    Looking for a low voltage translator? Check out the AXC family that supports 0.7V to 3.3V translation!

    The Logic Minute training page has videos on many interesting topics that all are kept shorter than 5 minutes.

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