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PCM1718: PCM1702 has been discontinued. Can we recommend products with similar functions?

Part Number: PCM1718
Other Parts Discussed in Thread: PCM1795


PCM1702 has been discontinued. Can we recommend products with similar functions? The communication interface is required to be the same, and the customer does not want to change the software.


  • Hi,

    As far as I am aware, TI's current audio product range does not include any DACs with perfect software compatibility to the PCM1702. I realize this isn't exactly as requested, but some new products can probably be made to work with some minor software changes. The PCM1702's input protocol is very similar to I2S, which is the standard supported by most new audio DACs. It looks like the old protocol is close enough that a change to I2S wouldn't be difficult, assuming the software can be modified.

    A possible replacement for the PCM1702 is the PCM1795. It can be configured to accept a 20-bit input stream and can run in a mono mode. However, this will require register configuration, which means some software configuration is required at boot over I2C or SPI.

    Here's a few of the options I see:

    1. Replace the part with the PCM1795 (or similar) and configure the software registers to support the current audio stream parameters.

    2. Use a DAC with higher bit depth and pad the end of the data output with zeros (software change still required to maintain clock sync and ensure I2S compatibility).

    I'll confirm this with a DAC product expert and reply back here if there is a product which can be configured to work without any software changes. However, I believe this is unlikely. Let me know if you have any other questions or concerns!