TEXAS INSTRUMENTS SDIO Port Expander with Voltage Level Translation, WQFN, 24-P

The TEXAS INSTRUMENTS SDIO Port Expander (TXS02612RTWR) provides voltage-level translation and enables a single SDIO port from a cell phone baseband to interface with two external SDIO peripherals. The device integrates a 6-channel SPDT switch with built-in level shifting, allowing seamless communication across different supply voltages.

Operating across three separate supply rails (VCCA, VCCB0 and VCCB1), each ranging from 1.1V to 3.6V, this expander supports baseband and peripherals running at different voltages. The SEL input selects between the B0 and B1 ports: a low signal engages B0, while a high signal engages B1. For the unselected port, the clock output is held low, and the data/command I/Os are pulled high to their respective VCCB via a 70kΩ resistor (±30% tolerance).

Key Features

• 6-to-12 demultiplexer/multiplexer for SDIO port expansion
• Built-in level translator eliminates voltage mismatch between baseband and SD card/SDIO peripheral
• VCCA, VCCB0 and VCCB1 each operate over full 1.1V to 3.6V range
• Latch-up performance exceeds 100mA per JESD 78, class II
• Green product, no Sb/Br
• ESD sensitive device, handle with proper precautions

Technical Specifications

• Interface: SDI
• Supply Voltage Min: 1.1V
• Supply Voltage Max: 3.6V
• IC Case / Package: WQFN
• No. of Pins: 24
• No. of I/O's: 12
• Operating Temperature Min: -40°C
• Operating Temperature Max: 85°C

This component is ideal for communications, networking, and portable device applications, delivering robust performance and reliable voltage translation in compact WQFN packaging.