Diodes Incorporated D7V9S1U2LP-7B

Overview

D7V9S1U2LP-7B from Diodes Incorporated is a unidirectional single-channel TVS diode designed for ESD and surge protection on signal/power lines in portable electronics. It features a 8.0V minimum breakdown voltage, 40A peak pulse current (8/20µs), 200pF typical junction capacitance, and ±30kV IEC 61000-4-2 ESD rating-deployed in cellular handset data-line protection.

For engineers reviewing the D7V9S1U2LP-7B datasheet, D7V9S1U2LP-7B pinout, D7V9S1U2LP-7B application, or D7V9S1U2LP-7B equivalent, key selection criteria include clamping voltage at 40A (≤13.0V), ultra-low profile U-DFN1006-2 package, IEC 61000-4-5 surge compliance, and suitability for high-density USB/MIPI/SDIO interface protection.

Technical Context

This TVS operates as a unidirectional clamp between two terminals, activating above 8.0V to divert transient energy to ground. Its low 200pF capacitance minimizes signal distortion on high-speed lines like USB 2.0 and MIPI D-PHY, while maintaining robust ±30kV contact/air ESD immunity per IEC 61000-4-2.

The device uses silicon avalanche structure with NiPdAu-plated copper leadframe for stable clamping performance across -55°C to +150°C. Thermal resistance of 500°C/W (R_θJA) and 250mW power dissipation are specified under standard FR-4 PCB mounting per Diodes' recommended pad layout.

Key Specifications

Pinout & Package

U-DFN1006-2 (Type B) is a 2-terminal, bottom-solder, no-lead package with exposed thermal pad not connected internally. Pin 1 (cathode side, marked "S3" or bar) connects to protected line; Pin 2 (anode) connects to ground. The device is polarity-sensitive and must be oriented correctly for unidirectional clamping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ7.0A and SP1003-01UTG, D7V9S1U2LP-7B uniquely balances 40A surge capability, ±30kV ESD immunity, and 200pF capacitance in a 1.0 × 0.6mm footprint-making it optimal for space-constrained, high-reliability portable data interfaces where both ESD and surge coexist.

Availability

D7V9S1U2LP-7B is available at Aetrix Electronics and suitable for cellular handsets, portable electronics, and computers and peripheral designs requiring stable component supply, consistent tape-and-reel delivery, and long-term lifecycle support.

Supply support for D7V9S1U2LP-7B 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 the Americas.

This device belongs to Diodes' UniGuard™ TVS portfolio, engineered specifically for high-density, low-capacitance transient protection in consumer and industrial portable electronics with stringent ESD and surge immunity requirements.

FAQ

What is the correct orientation for D7V9S1U2LP-7B during PCB placement?

Pin 1 (marked "S3" or with a bar on the package bottom) is the cathode and must connect to the protected signal line; Pin 2 (anode) must connect to system ground. Reversing orientation disables clamping function and may cause permanent failure under transient stress.

Does D7V9S1U2LP-7B meet AEC-Q200 for automotive use?

No-D7V9S1U2LP-7B is not AEC-Q200 qualified. Diodes offers automotive-grade variants (e.g., D7V9S1U2LPQ-7B) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening; this standard version is intended for commercial portable electronics.

How does its 200pF capacitance impact USB 2.0 signal integrity?

At 200pF, the device introduces <1% rise-time degradation on 480Mbps USB 2.0 signals when placed with <2mm trace length and proper ground return. Measured eye diagrams show >30% eye opening margin at 480Mbps, confirming compatibility with full-speed USB compliance testing.

Can D7V9S1U2LP-7B replace bidirectional TVS diodes in ESD-only applications?

No-it is unidirectional and conducts only for positive transients on the cathode line. Using it in place of a bidirectional device (e.g., D7V9S1U2L-7B) on AC-coupled or symmetric lines risks incomplete protection during negative ESD events and potential forward conduction damage.