Product details


Applications SDIO, MMC, SD Card Bits (#) 4 High input voltage (Min) (Vih) 0.9 High input voltage (Max) (Vih) 3.6 Vout (Min) (V) 0.74 Output voltage (Min) (V) 0.74 Output voltage (Max) (V) 3.6 Data rate (Max) (Mbps) 120 IOH (Max) (mA) -8 IOL (Max) (mA) 8 Features Edge rate accelerator Rating Catalog open-in-new Find other Application-specific voltage translators

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WQFN (RTW) 24 16 mm² 4 x 4 open-in-new Find other Application-specific voltage translators


  • 6-to-12 Demultiplexer/Multiplexer Allows SDIO Port Expansion
  • Built-in Level Translator Eliminates Voltage Mismatch Between
    Baseband and SD Card or SDIO Peripheral
  • VCCA, VCCB0, and VCCB1 Each Operate Over Full 1.1-V to 3.6-V Range
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Performance A Port
    • 2000-V Human-Body Model (A114-B)
    • 100-V Machine Model (A115-A)
    • 1500-V Charged-Device Model (C101)
  • ±8-kV Contact Discharge IEC 61000-4-2 ESD Performance (B Port)

MicroStar Junior is a trademark of Texas Instruments.

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The TXS02612 is designed to interface the cell phone baseband with external SDIO peripherals. The device includes a 6-channel SPDT switch with voltage-level translation capability. This allows a single SDIO port to be interfaced with two SDIO peripherals. The TXS02612 has three separate supply rails that operate over the full range of 1.1 V to 3.6 V. This allows the baseband and SDIO peripherals to operate at different supply voltages if required.

The select (SEL) input is used to choose between the B0 port and B1 port. When SEL = Low, B0 port is selected; when SEL = High, B1 port is selected. SEL is referenced to VCCA. For the unselected B port, the clock output is held low, whereas the data and command I/Os are pulled high to their respective VCCB through a 70-k resistor (±30% tolerance).

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Technical documentation

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Type Title Date
* Data sheet TXS02612 SDIO Port Expander With Voltage-Level Translation datasheet (Rev. C) Feb. 03, 2010
Selection guide Voltage Translation Buying Guide (Rev. A) Apr. 15, 2021
Application note Translate Voltages for SDIO Oct. 20, 2020

Design & development

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Design tools & simulation

SCEM555.ZIP (78 KB) - IBIS Model

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