Texas Instruments TPD1E1B04DPYT

Overview

TPD1E1B04DPYT from Texas Instruments is a single-channel bidirectional TVS ESD protection diode in X1SON (DPY) 2-pin package, featuring 1 pF typical IO capacitance, ±30-kV IEC 61000-4-2 contact/air-gap ESD rating, and 8.5 V clamping voltage at 16-A TLP-designed for USB 2.0 data line (D+/D−) protection in space-constrained portable electronics.

For engineers reviewing the TPD1E1B04DPYT datasheet, TPD1E1B04DPYT pinout, TPD1E1B04DPYT application, or TPD1E1B04DPYT equivalent, key selection criteria include ultra-low dynamic resistance (0.15 Ω), industrial temperature range (–40°C to +125°C), reverse stand-off voltage (±3.6 V), and compatibility with high-speed interfaces requiring sub-1.3 pF capacitance and minimal signal distortion.

Technical Context

The TPD1E1B04DPYT operates as a passive, bidirectional clamping device triggered by overvoltage events on either I/O pin relative to GND. Its symmetrical breakdown voltage (±6.4 V typical) and low RDYN enable fast transient response (<1 ns) and precise voltage limiting during ESD, EFT, and surge events.

It integrates no active circuitry or control logic-functionality relies entirely on silicon PN junction characteristics. The device sustains 80-A IEC 61000-4-4 EFT bursts and 6.3-A IEC 61000-4-5 surges while maintaining ≤100 nA leakage at ±2.5 V bias across its full operating temperature range.

Key Specifications

Pinout & Package

TPD1E1B04DPYT uses the X1SON (DPY) 2-pin surface-mount package (0.60 mm × 1.00 mm, 0.45 mm max height), optimized for flow-through routing and minimal PCB real estate. Pin 1 and Pin 2 are identical bidirectional I/O terminals-either connects to protected signal line (e.g., D+ or D−), the other to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with ESD5Z3.3T5G and SMA6J33A, TPD1E1B04DPYT delivers superior USB 2.0 compatibility via its 1-pF capacitance and true bidirectionality, while its 0.6 mm × 1.0 mm X1SON footprint enables denser layouts than DO-214AC alternatives-critical for modern compact consumer electronics.

Availability

TPD1E1B04DPYT is available at Aetrix Electronics and suitable for USB 2.0 interface protection, wearable device I/O safeguarding, and set-top box front-panel port hardening requiring stable component supply and long-term design-in support.

Supply support for TPD1E1B04DPYT 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in precision analog and high-reliability protection solutions.

The TPD1E1B04DPYT belongs to TI's ESD protection portfolio, engineered specifically for high-speed digital interfaces-including USB, HDMI, and MIPI-where ultra-low capacitance and rapid clamping response are mandatory for signal fidelity and system robustness.

FAQ

What is the primary function of the TPD1E1B04DPYT in a USB 2.0 design?

The TPD1E1B04DPYT serves as a bidirectional ESD protection diode placed between the USB connector and transceiver IC. It clamps transient voltages-such as ±30-kV ESD strikes-to 8.5 V at 16-A TLP, preventing damage to sensitive downstream circuitry. Its 1-pF capacitance ensures minimal impact on USB 2.0 signal integrity, making it ideal for D+ and D− line protection in TPD1E1B04DPYT-based designs.

Does the TPD1E1B04DPYT require any external bias or power supply?

No, the TPD1E1B04DPYT is a passive TVS diode and requires no external power or bias. It operates solely based on voltage thresholds: it remains non-conductive below ±3.6 V reverse stand-off voltage and triggers into low-resistance clamping mode during overvoltage events. This makes TPD1E1B04DPYT suitable for always-on, low-power applications such as wearables and portable USB peripherals.

Can the TPD1E1B04DPYT be used to protect both D+ and D− lines simultaneously?

Yes-each TPD1E1B04DPYT protects one signal line. A complete USB 2.0 protection scheme uses two TPD1E1B04DPYT devices: one for D+, one for D−, each connected between its respective line and GND. The device's bidirectional symmetry and matched electrical characteristics ensure balanced protection without skew or timing mismatch in TPD1E1B04DPYT implementations.

What is the significance of the 0.15 Ω dynamic resistance (RDYN) specification for the TPD1E1B04DPYT?

The 0.15 Ω RDYN value reflects the internal resistance of the TPD1E1B04DPYT during clamping, directly determining the voltage overshoot (V = I × R) seen by protected circuitry. At 16-A TLP current, this yields only 2.4 V of resistive drop-contributing to the low 8.5 V total clamping voltage. This low RDYN is critical for preserving margin in systems with tight voltage tolerances, such as those using 3.3-V USB transceivers in TPD1E1B04DPYT-protected designs.

Is the TPD1E1B04DPYT compatible with lead-free reflow processes?

Yes, the TPD1E1B04DPYT carries a Level-1 moisture sensitivity rating per JEDEC J-STD-020 and is qualified for peak reflow temperatures up to 260°C. Its NiPdAu or NiPdAuAg lead finish ensures reliable solderability in standard lead-free assembly processes. The device's X1SON (DPY) package is designed for robust thermal performance during reflow, supporting high-yield manufacturing of TPD1E1B04DPYT-equipped PCBs.