Diodes Incorporated DESD5V0U1BB-7

Overview

DESD5V0U1BB-7 from Diodes Incorporated is a bidirectional TVS diode designed for ESD protection of high-speed data lines in portable electronics. It features 5 V reverse standoff voltage, 7.2 V clamping voltage at 3 A (8/20 µs), 2.9 pF input capacitance at 0 V, ±10 kV IEC 61000-4-2 contact ESD rating, and SOD523 package. It is deployed in USB 2.0, HDMI, and audio jack interfaces to suppress transient overvoltage.

For engineers reviewing the DESD5V0U1BB-7 datasheet, DESD5V0U1BB-7 pinout, DESD5V0U1BB-7 application, or DESD5V0U1BB-7 equivalent, key selection criteria include low capacitance for signal integrity, precise clamping performance under IEC-compliant transients, thermal derating behavior on FR-4 PCBs, and compatibility with automated SMT assembly for space-constrained handheld devices.

Technical Context

This device operates as a low-capacitance, bidirectional transient voltage suppressor optimized for protecting sensitive I/O pins against electrostatic discharge. Its silicon avalanche structure delivers fast response (<1 ns) and stable clamping across temperature, with breakdown voltage specified at 5.5–9.5 V (IR = 5 mA) and dynamic impedance of 0.3 Ω (TLP, 20 A).

The SOD523 package enables integration into high-density layouts while maintaining thermal resistance of 500 °C/W (junction-to-ambient, FR-4, 2 oz copper). Power dissipation is rated at 250 mW, derating linearly above +25 °C ambient per Figure 1, supporting reliable operation in consumer-grade temperature ranges (–65 °C to +150 °C).

Key Specifications

Pinout & Package

Package: SOD523 - ultra-small surface-mount plastic case (1.6 × 0.8 × 0.6 mm), moisture sensitivity level 1, matte tin-plated alloy 42 leadframe, RoHS and halogen-free compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional TVS diode applications.

Compared with SMAJ5.0A and TPD2E001DRYR, DESD5V0U1BB-7 uniquely balances ultra-low capacitance (2.9 pF), compact SOD523 size, and ±10 kV ESD rating-making it optimal for single-line, high-speed, space-constrained applications where unidirectional alternatives introduce design overhead and dual-channel parts exceed required channel count.

Availability

DESD5V0U1BB-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI port ESD suppression, and smartphone audio jack safeguarding requiring stable component supply and full RoHS/halogen-free compliance.

Supply support for DESD5V0U1BB-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

This device belongs to Diodes' ESD protection portfolio, engineered specifically for high-speed data line immunity in portable and consumer electronics where board space, signal fidelity, and international ESD certification are primary constraints.

FAQ

What is the maximum operating temperature for DESD5V0U1BB-7?

The device supports continuous operation from –65 °C to +150 °C junction temperature. Its thermal resistance is 500 °C/W on standard FR-4 (2 oz copper), so ambient temperature must be limited to +85 °C at full 250 mW power dissipation to maintain safe junction temperatures per Figure 1 derating curve.

Can DESD5V0U1BB-7 protect both positive and negative ESD transients?

Yes-it is a bidirectional TVS diode with symmetrical avalanche characteristics. It clamps transients of either polarity between its two terminals, making it suitable for AC-coupled or differential signal lines like USB D+/D− without requiring polarity-aware layout.

How does the 2.9 pF capacitance impact USB 2.0 signal integrity?

At 2.9 pF, the device introduces negligible capacitive loading on 90 Ω differential USB 2.0 traces. Measured eye diagrams show <5% rise-time degradation at 480 Mbps, ensuring compliance with USB-IF signal quality specifications when placed within 3 mm of the connector per recommended layout AP02001.

Is DESD5V0U1BB-7 compatible with lead-free reflow profiles?

Yes-the device uses matte tin-plated alloy 42 leadframe and is qualified for standard Pb-free reflow per J-STD-020. Its moisture sensitivity level is 1, eliminating bake requirements prior to assembly, and it withstands peak temperatures up to 260 °C for 10 seconds without parametric shift or delamination.