Texas Instruments TXS0206-29YFPR

Overview

TXS0206-29YFPR from Texas Instruments is a voltage-translation transceiver and integrated 2.9-V/200-mA LDO regulator for MMC/SD/Memory Stick™ interfaces. It provides bidirectional level shifting between 1.1–3.6-V A-side (host) and fixed 2.9-V B-side (card), ±8-kV IEC 61000-4-2 ESD protection on card-side pins, EMI filtering, and auto-direction sensing without control signals - deployed in mobile phones, digital cameras, and portable media players.

For engineers reviewing the TXS0206-29YFPR datasheet, TXS0206-29YFPR pinout, TXS0206-29YFPR application, or TXS0206-29YFPR equivalent, key selection criteria include its dual-role as translator + regulator, 4-ns max propagation delay (1.8 V ↔ 2.9 V), 200-mV dropout at 200 mA, integrated pullup resistors with dynamic 4 kΩ/40 kΩ/70 kΩ states, and WCSP-YFP package compatibility with high-density memory-card interface layouts.

Technical Context

The TXS0206-29YFPR implements a semi-buffered, auto-direction-sensing architecture for SDIO data lines (DAT0–DAT3, CMD, CLK, CLK-f), eliminating external direction-control logic. Each bidirectional channel uses an N-channel pass-gate (~300 Ω R_ON) with edge-rate acceleration circuitry that reduces output impedance to 50–70 Ω for ~30 ns during signal transitions to maintain 60-MHz clock rates and 60-Mbps data throughput.

Its integrated LDO accepts 3.05–5.5-V input (VBATT) and delivers regulated 2.9-V ±3% output (VCCB O/P) at up to 200 mA with 200-mV dropout, PSRR of 50 dB @ 1 kHz, and 200-μs startup time into 2.2-μF output capacitance. ESD protection meets ±8-kV contact discharge (IEC 61000-4-2) on B-port pins and 2-kV HBM on A-port pins.

Key Specifications

Pinout & Package

TXS0206-29YFPR uses a 20-bump wafer chip-scale package (WCSP-YFP) with 0.4-mm ball pitch and dimensions 1.96 mm × 1.56 mm. Pin assignments follow top-view layout with five rows (A–E) and four columns (1–4).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-translation and memory-card interface applications.

Compared with TXS0206-18YFPR and SN74AVC4T245RTER, the TXS0206-29YFPR uniquely integrates 2.9-V regulation, ±8-kV ESD, and auto-direction SDIO translation in one WCSP package - reducing component count, layout complexity, and validation effort for MMC/SD/MS designs.

Availability

TXS0206-29YFPR is available at Aetrix Electronics and suitable for mobile phone memory interfaces, digital camera SD card slots, and portable media player expansion requiring stable component supply, long-term lifecycle support, and wafer-level packaging for high-density layouts.

Supply support for TXS0206-29YFPR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TXS0206-29YFPR belongs to TI's Application-Specific Interface Products (ASIP) portfolio, engineered specifically to simplify memory-card interface design by integrating translation, regulation, protection, and filtering into a single compact device.

FAQ

What is the primary function of the TXS0206-29YFPR in an SD card interface?

The TXS0206-29YFPR serves as a complete interface solution between a low-voltage host processor (1.1–3.6 V) and a 2.9-V SD/MMC/Memory Stick™ card. It performs bidirectional voltage translation with auto-direction sensing, supplies regulated 2.9-V power via its integrated LDO, and provides ±8-kV IEC 61000-4-2 ESD protection - all within a single 1.96 mm × 1.56 mm WCSP package. The TXS0206-29YFPR eliminates the need for discrete level shifters, regulators, and protection components.

Does the TXS0206-29YFPR require external pullup resistors on SDIO lines?

No, the TXS0206-29YFPR integrates smart pullup resistors on all SDIO lines (DAT0–DAT3, CMD, CLK, CLK-f). These resistors dynamically adjust between 4 kΩ (when driving high), 40 kΩ (when driving low), and 70 kΩ (during Hi-Z or disable states) to optimize speed, VOL, and static power. External pullups are unnecessary and may interfere with the device's auto-direction sensing behavior. The TXS0206-29YFPR also includes a dedicated 100-kΩ pullup on the WP/CD pin.

How does the TXS0206-29YFPR handle clock signal integrity for high-speed SD modes?

The TXS0206-29YFPR maintains clock integrity through three mechanisms: (1) a fully buffered CLKB output with edge-rate acceleration that achieves ≤17-ns rise/fall times at 60 MHz; (2) a dedicated CLK-f feedback path to the host for resynchronization; and (3) integrated EMI filtering that attenuates >20 dB above 150 MHz. These features ensure reliable timing margins for SD High-Speed and UHS-I modes. The TXS0206-29YFPR's propagation delay is specified at 4 ns max (1.8 V ↔ 2.9 V), supporting tight setup/hold windows.

Can the TXS0206-29YFPR be used with 1.8-V SD cards?

No - the TXS0206-29YFPR is specifically configured for 2.9-V memory cards (legacy MMC, SD, Memory Stick™). Its internal LDO is trimmed to 2.9 V ±3%, and its B-port I/Os are optimized for that voltage. For 1.8-V SD cards, TI offers the pin-compatible TXS0206-18YFPR variant, which delivers 1.8 V instead of 2.9 V. Using TXS0206-29YFPR with a 1.8-V card risks overvoltage damage and violates SD specification voltage limits. Always match the TXS0206-xYFPR suffix (e.g., -29 vs. -18) to the target card's supply requirement.

What thermal considerations apply to the TXS0206-29YFPR's LDO under full 200-mA load?

Under 200-mA load at maximum dropout (200 mV), the TXS0206-29YFPR dissipates 40 mW (200 mA × 200 mV). With a θ_JA of 117°C/W, this yields ~4.7°C junction-to-ambient rise above ambient temperature. However, derating curves show output current decreases above 85°C ambient due to thermal foldback. For continuous 200-mA operation, keep ambient temperature ≤85°C and ensure adequate PCB copper pour under the YFP package. The TXS0206-29YFPR specifies a maximum junction temperature of 125°C and includes thermal shutdown protection.