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TL16C754B: good choice for generating 4 UARTs from an SPI?

Thomas Bewley
Expert 1030 points
Part Number: TL16C754B
Other Parts Discussed in Thread: MSP430FR5962

I want to generate 4 UARTs from an SPI connection.  I can't seem to find the right part at ti, but the TL16C754B is somewhat close (but with the wrong interface).  Can you recommend an appropriate ti part?  Looking for something similar to the MAX14830.  Should I instead be looking at programming an MSP430 (like maybe a MSP430FR5962...) to get this job done?  I had hoped to find a dedicated device...

  • 0
    TI__Guru 62920 points

    Hi Thomas,

    Unfortunately I don't know of a dedicated IC for this from TI.  You're right about TL16C754B (and pretty much all of our dedicated UART chips) in that it uses a parallel interface to the processor rather than a SPI one.  I suppose you could use something like an IO expander to convert between this parallel interface to a serial one like I2C or SPI, but using an MCU like an MSP430 with at least 4 UART ports (as you mentioned) seems simpler and is typically what I recommend.

    Max

  • 0 in reply to Miguel Robertson
    Expert 1030 points

    HI Max - Ok, thanks so much for the clear answer.  Both approaches you suggest do seem unnecessarily complicated for what is likely a common need (wiring up a system with limited i/o to a bunch of UART peripherals).  Putting this one one my wish list for new TI products then...