Diodes Incorporated DESD0V8Z1BCSF-7

Overview

DESD0V8Z1BCSF-7 from Diodes Incorporated is a bidirectional TVS diode designed for ultra-low-capacitance ESD protection of high-speed data lines. It delivers ±6 kV IEC 61000-4-2 contact ESD immunity, 0.18 pF typical input capacitance, and 4.0 V clamping voltage at 3 A, making it suitable for USB3.1 and Thunderbolt 3 interface protection.

For engineers reviewing the DESD0V8Z1BCSF-7 datasheet, DESD0V8Z1BCSF-7 pinout, DESD0V8Z1BCSF-7 application, or DESD0V8Z1BCSF-7 equivalent, key selection criteria include channel count (1), clamping performance under 8/20 µs surge, reverse standoff voltage (0.8 V), thermal resistance (500 °C/W), and X2-DSN0603-2 chip-scale package compatibility with high-density PCB layouts.

Technical Context

This TVS diode operates as a bidirectional transient suppressor across a single I/O-to-V_SS path, leveraging silicon avalanche breakdown to clamp fast-rising ESD transients. Its differential resistance of 0.4 Ω (TLP, 10 A) ensures minimal voltage overshoot during sub-100 ns events, while the 0.18 pF capacitance preserves signal integrity on 10 Gbps+ serial links.

The device uses NiAu bump terminations on a bare-die chip-scale package (X2-DSN0603-2), with electrically active side walls requiring controlled solder mask definition. Thermal derating follows a linear curve from 250 mW at 25°C to zero at 150°C ambient, per FR-4 pad layout compliance.

Key Specifications

Pinout & Package

Package: X2-DSN0603-2 chip-scale package (0.60 mm × 0.30 mm × 0.14 mm), NiAu bump terminations, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMA6J08A-Q and TPD4E001DPYR, DESD0V8Z1BCSF-7 uniquely combines sub-0.2 pF capacitance, sub-4.5 V clamping, and 0.6 mm × 0.3 mm footprint - enabling direct placement on 10+ Gbps differential traces without equalization overhead.

Availability

DESD0V8Z1BCSF-7 is available at Aetrix Electronics and suitable for USB3.1 interface protection, Thunderbolt 3 data lane hardening, and portable computing I/O protection requiring stable component supply and long-term lifecycle assurance.

Supply support for DESD0V8Z1BCSF-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 and manufacturing operations across Asia and the Americas.

This device belongs to Diodes' low-capacitance TVS portfolio, engineered specifically for ESD robustness in next-generation high-speed serial interfaces without compromising signal integrity.

FAQ

What is the maximum allowable PCB trace length between DESD0V8Z1BCSF-7 and the protected connector?

Trace length must be ≤0.3 mm from device pad to connector pin to minimize parasitic inductance. Longer traces increase voltage overshoot during ESD events due to L·di/dt effects, potentially exceeding the 4.0 V clamping specification. The X2-DSN0603-2 package's 0.4 mm pitch and side-wall termination design require strict adherence to Diodes' recommended pad layout for optimal high-frequency performance.

Does DESD0V8Z1BCSF-7 support automated optical inspection (AOI) after reflow?

Yes - the NiAu bump terminations and flat top surface enable reliable AOI detection of solder joint quality. However, side-wall inspection is not feasible due to electrically active bare silicon walls; therefore, process validation must rely on cross-section analysis or functional ESD testing rather than visual verification of side-wall wetting.

Can DESD0V8Z1BCSF-7 be used in automotive infotainment USB ports?

It meets AEC-Q200 stress test requirements for temperature cycling and humidity exposure when assembled per Diodes' recommended land pattern and reflow profile. However, full automotive qualification requires system-level validation per ISO 10605, and the device is not AEC-Q101 qualified - use only in non-safety-critical infotainment subsystems with additional system-level filtering.

How does the 0.18 pF capacitance impact impedance matching on 90 Ω differential USB3.1 traces?

At 5 GHz, the 0.18 pF capacitance introduces <0.2 Ω reactance (X_C = 1/(2πfC)), causing negligible discontinuity in 90 Ω differential impedance. Measured insertion loss remains <0.3 dB up to 10 GHz, confirming compatibility with USB3.1 Gen2 eye diagram masks without requiring pre-emphasis or equalization compensation.