TS3A5018: eMMC and uSD mux

Barrett Bryan

Part Number: TS3A5018

Is this device capable of reliably muxing between eMMC and uSD? If not, what's the recommended device for this application?

over 6 years ago

0 Saminah C over 6 years ago

TI__Genius 9132 points

Hi Bryan,

I typed in eMMC into the switches e2e search tool and found this posting that can be helpful.

Please let me know if you have any further questions.

Thank you,

Saminah

0 Barrett Bryan over 6 years ago in reply to Saminah C

TI__Intellectual 1010 points

Hi Saminah,

Adam's post is useful, but I'm not sure if this answers my question. Can TS3A5018 in particular be used to as mux between MCU and eMMC OR uSD in the same system?

Here's a table with clock and data rates, but other info may be needed.

https://en.wikipedia.org/wiki/MultiMediaCard#Table

0 Barrett Bryan over 6 years ago in reply to Barrett Bryan

TI__Intellectual 1010 points

Do you have access to JEDEC spec? I think JESD84-B51 is the one. They should spec max capacitance of bus and devices.

https://www.jedec.org/document_search?search_api_views_fulltext=jesd84-b51

https://www.sdcard.org/downloads/pls/index.html

0 Saminah C over 6 years ago in reply to Barrett Bryan

TI__Genius 9132 points

Hi Bryan,

TS3A5018 supports bandwidth of 300MHz and supply voltage of 1.8-V to 3.6-V..

Based on the clock and data rates you shared in the table, TS3A5018 can be used to mux between MCU and uSD - I would also look at the signal voltage specifications.

Pease note we have not done any compliance testing of this device specifically with eMMC OR uSD.

Thank you,

Saminah

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TS3A5018: eMMC and uSD mux