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TXS0206-29: Finding UHS-I compliant voltage level translator for SD card

Part Number: TXS0206-29
Other Parts Discussed in Thread: SN74AXC2T45, SN74AXC4T774

Hello, I need an SD 3.0 compliant voltage level translator that can convert 3.3V signals from my processor to 1.8V signals for an SD card so that I can run UHS-I type cards. I am basically looking for a replacement for this component with is EOL: IP4856CX25

I ran into this TI part (TXS0206-29), but it does not seem to be fast enough to work with UHS-I cards. Do you have another option or suggestion? 

  • Hi Juan,

    No, unfortunately we don't have a direct replacement for the IP4856CX25.

    There's a lot contained in that device - an LDO voltage regulator, EMI filter network, and system-level ESD protection. Two of those are not found on any TI voltage translators, and the third is only on a select few devices.

    To replicate that functionality, there will probably be many external components required.

    The closest match, based on the architecture of the IP4856CX25, would be our AXC or AVC lines of direction controlled voltage translation. It looks like there's one channel of unidirectional voltage translation for the clock, 2 independent direction controlled channels, and then 3 linked direction controlled channels.

    To most closely match that functionality, I would select the SN74AXC4T774, which provides 4 channels with separate direction control, and add an SN74AXC2T45, which has 2 channels controlled by a single direction pin.

    The AXC family can support up to 190 MHz (380 Mbps) for 1.8V to 3.3V translation.

  • OK. That is unfortunate. Thanks for the reply.