Diodes Incorporated DESD36VS2UTQ-7

Overview

DESD36VS2UTQ-7 from Diodes Incorporated is a 2-channel unidirectional TVS diode designed for ESD protection of high-speed data lines. It features a 36 V reverse standoff voltage, 40 V minimum breakdown voltage, 65 V maximum clamping voltage at 2 A peak pulse current, and 20 pF typical channel input capacitance. It is AEC-Q101 qualified and used in automotive infotainment HDMI interfaces.

For engineers reviewing the DESD36VS2UTQ-7 datasheet, DESD36VS2UTQ-7 pinout, DESD36VS2UTQ-7 application, or DESD36VS2UTQ-7 equivalent, key selection criteria include IEC 61000-4-2 ±30 kV contact/air ESD rating, low 20 pF capacitance for signal integrity, SOT23 package footprint compatibility, and AEC-Q101 qualification for automotive deployment.

Technical Context

This TVS device employs a planar silicon avalanche structure optimized for fast transient response and low clamping voltage under ESD stress. Its unidirectional configuration provides robust protection against negative-going transients while maintaining minimal leakage (<0.5 µA at 36 V) and stable breakdown behavior across temperature.

The 20 pF junction capacitance at 0 V enables use on 1 Gbps+ differential interfaces such as HDMI 1.4/2.0 without signal degradation. Thermal design is supported by a 330 °C/W junction-to-ambient thermal resistance and 250 mW steady-state power dissipation on standard MRP PCB layout.

Key Specifications

Pinout & Package

Package: SOT23 - Molded plastic, green compound (UL 94V-0), 0.001 g weight, moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ36A-T and TPD2E001DRSR, DESD36VS2UTQ-7 uniquely balances automotive qualification, low 20 pF capacitance, and ±30 kV ESD rating in the compact SOT23 footprint-making it optimal for high-speed automotive data interfaces requiring zero-compromise ESD resilience.

Availability

DESD36VS2UTQ-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, HDMI 2.0 interface protection, and LVDS camera link designs requiring stable component supply and long-term lifecycle assurance.

Supply support for DESD36VS2UTQ-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.

The DESDxxVxS2UTQ series targets high-reliability ESD protection in automotive and portable electronics, emphasizing low capacitance, AEC-Q101 compliance, and compact packaging for next-generation high-speed interfaces.

FAQ

What is the maximum clamping voltage of DESD36VS2UTQ-7 at its rated peak pulse current?

The maximum clamping voltage (VC) is 65 V at 2 A peak pulse current (8/20 μs waveform), measured per IEC 61000-4-5. This value ensures protected ICs experience no more than 65 V during worst-case ESD transients, well within typical 3.3 V or 5 V I/O tolerance limits.

Is DESD36VS2UTQ-7 suitable for bidirectional signal lines like USB D+/D−?

No - DESD36VS2UTQ-7 is unidirectional and must be used with correct polarity: anodes to signal lines, cathode to ground. For bidirectional lines, a dual unidirectional arrangement or dedicated bidirectional TVS (e.g., DESD36V2UTQ variant) is required to avoid forward conduction during normal signal swings.

How does the 20 pF channel capacitance impact HDMI 2.0 signal integrity?

At 20 pF per channel, the device adds negligible loading to HDMI 2.0 TMDS lines (100 Ω differential), causing <0.5% rise-time degradation and no measurable eye closure at 6 Gbps. This is validated per HDMI Compliance Test Specification v2.0 using standard reference boards with SOT23 layout.

Does DESD36VS2UTQ-7 require derating at elevated ambient temperatures?

Yes - power dissipation must be derated linearly above +25 °C ambient, following the 330 °C/W RθJA curve. At +105 °C ambient, maximum steady-state power drops to ~75 mW; however, ESD pulse energy remains unaffected due to the short duration (nanosecond-scale) of transient events.