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eMMC bus bridge

Other Parts Discussed in Thread: TS3A27518E, TMUX1574

hi,

we are working on something like

http://e2e.ti.com/support/switches-multiplexers/f/388/t/837881

Is there something similar to TS3A27518E, dedicated for 8-bit SDIO/eMMC memory ?

We need to switch eMMC between MCU and USB bridge – dual-host use scenario.

thanks a lot in advance

have a great day

KR

Vincenzo

  • Hi Vincenzo,

    Do you need 8 total data lanes and clock lanes you would like to switch?

    What is the configuration you are looking for  - is it 2:1?

    Can you also specify the voltage range of the signals -  I believe MMC supports 1.2 V - 3.3 V

    How much data rate you need for your application? I believe eMMC supports up to 200Mbps.  We recommend switch bandwidth be 1.5 x the data rate.  For 200Mbps we would recommend a switch with 300MHz

    You can use the TI.com switch selection tool and filter for these devices.  For example a 4-channel, 2:1, 1.8V, and >300 MHz bandwidth would return the TMUX1574. If you need an 8-channel solution with same configuration,  you can use 2 of these muxes.

    regards,

    Saminah

  • hi Saminah,

    I see.

    Unfortunately we need 10 lines (8-bit data + 1 clk + 1 cmd).

    Is there any dedicated IC or a sinlge chip solution?

    thanks a lot in advance

    KR

    Vincenzo

  • Hi  Vincenzo,

    We have some 10 channel switches with 1:1 configuration. Here is a list when you search in the device search tool:

    Depending on your voltage range and sorting on the bandwidth, you can see if it fits your application.

    Thanks

    Saminah