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Diodes Incorporated DESD1LIN2WSQ-7
- Part No.:
- DESD1LIN2WSQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
DESD1LIN2WSQ-7.pdf
- Description:
- TVS DIODE 24VWM 50VC SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,096
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Product details
Overview
DESD1LIN2WSQ-7 from Diodes Incorporated is a bidirectional TVS diode engineered for LIN bus data line protection in automotive systems. It delivers ±30kV IEC 61000-4-2 ESD immunity, 3A peak pulse current handling, 13pF typical channel capacitance, and dual breakdown voltages (17.1V and 25.4V) to safeguard LIN transceivers against transient overvoltage events.
For engineers reviewing the DESD1LIN2WSQ-7 datasheet, DESD1LIN2WSQ-7 pinout, DESD1LIN2WSQ-7 application, or DESD1LIN2WSQ-7 equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low capacitance for 20.2 kbps LIN signaling integrity, and SOD323 footprint compatibility with space-constrained automotive ECUs.
Technical Context
This device implements a symmetrical dual-Zener structure enabling identical ESD protection in both signal directions-critical for LIN's half-duplex, single-wire bus topology. Its 13pF input capacitance minimizes signal distortion at the standard LIN baud rate of 19.2–20.2 kbps, while the 25.4V/17.1V VBR pair ensures robust clamping across LIN's nominal 12V supply and fault-tolerant voltage swing.
The SOD323 package supports high-density PCB layouts in automotive control modules, and its AEC-Q101 qualification confirms reliability under thermal cycling (-55°C to +150°C), humidity, and mechanical stress per IATF 16949 manufacturing controls.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Pin1→2) | 17.1V min - triggers clamping before LIN transceiver damage threshold (~18V) |
| VBR | 25.4V min - protects against reverse-polarity and load-dump induced overvoltage |
| IPP | 3.0A max (8/20µs) - handles ISO 7637-2 Pulse 1 & 2a surge events |
| CT | 13pF typ @ 1MHz - preserves LIN signal rise/fall time & timing margin |
| VESD | ±30kV contact/air - exceeds IEC 61000-4-2 Level 4 for cockpit module ESD robustness |
| RθJA | 500°C/W - enables thermal management on 2oz FR-4 pads without derating below 125°C ambient |
| PPP | 160W peak - sustains short-duration transients without thermal runaway |
Pinout & Package
Package: SOD323 - surface-mount, 2-pin, 1.3mm × 1.7mm × 0.9mm body, matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode for forward conduction (Pin1→Pin2) | Clamps positive transients relative to Pin 2; defines 17.1V breakdown path |
| Pin 2 | Anode for forward conduction (Pin2→Pin1) | Clamps negative transients relative to Pin 1; defines 25.4V breakdown path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables single-device protection of LIN's unidirectional data line without polarity constraints |
| AEC-Q101 qualification | Validated for automotive underhood and cabin environments including thermal shock, vibration, and humidity |
| Low 13pF channel capacitance | Maintains LIN signal integrity up to 20.2 kbps with <5% timing jitter increase |
| ±30kV ESD immunity | Eliminates need for secondary ESD suppression in door modules, seat controllers, and HVAC nodes |
| SOD323 footprint | Reduces PCB area by 40% vs. SOT23 while retaining hand-solderability and reflow compatibility |
Applications
| Body Control Module (BCM) | Power Window Control Unit |
|---|---|
Use Scenario: Protects LIN communication between BCM and door latch sensors during ESD discharge from human touch. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed directly at LIN transceiver input to clamp fast transients before signal degradation. Use Value: Prevents false wake-up or communication loss during ±30kV contact discharge, ensuring ASIL-B functional safety compliance. | Use Scenario: Shields LIN interface between window motor driver and master controller during cable harness flexing and connector mating. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor maintaining 20.2 kbps bit timing accuracy under 3A surge pulses. Use Value: Avoids LIN frame corruption caused by 13pF parasitic loading, enabling reliable auto-reverse detection and obstacle sensing. |
| Roof Module (Sunroof/Climate) | Seat Position Memory Controller |
Use Scenario: Guards LIN link between sunroof actuator and roof electronics during thermal cycling-induced voltage spikes. IC Role / Device Role / Timing Role: Dual-breakdown TVS providing asymmetric clamping (17.1V/25.4V) to accommodate 12V system tolerances and reverse-battery faults. Use Value: Ensures uninterrupted position feedback transmission despite -40°C to +105°C operating range and 150°C storage exposure. | Use Scenario: Secures LIN connection between seat ECU and memory switch panel exposed to repeated electrostatic discharge from occupant entry/exit. IC Role / Device Role / Timing Role: AEC-Q101-qualified transient protector mounted adjacent to LIN transceiver IC input pin. Use Value: Delivers field-proven reliability over 10,000 mating cycles without parameter drift or leakage increase beyond 50nA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional LIN bus protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-01WTG | Unidirectional; 1-channel; 12pF CT; 14.5V VBR; no AEC-Q101 | Limited to single-polarity protection; requires external biasing for full LIN swing coverage | Use only in non-automotive LIN nodes where cost outweighs qualification requirements |
| ESDALC6V1-1U2 | Bidirectional; 1-channel; 15pF CT; 6.1V VBR; AEC-Q101 qualified | Lower clamping voltage unsuitable for 12V LIN bus; risk of false triggering during normal operation | Select only if protecting low-voltage LIN variants (e.g., 5V logic-level interfaces) |
Compared with SP1003-01WTG and ESDALC6V1-1U2, DESD1LIN2WSQ-7 uniquely combines AEC-Q101 qualification, true bidirectional 17.1V/25.4V clamping, and 13pF capacitance optimized for standard 12V automotive LIN networks-making it the only drop-in solution for OEM-compliant ECU designs.
Availability
DESD1LIN2WSQ-7 is available at Aetrix Electronics and suitable for Body Control Modules, Power Window Control Units, Roof Modules, and Seat Position Memory Controllers requiring stable component supply and automotive-grade traceability.
Supply support for DESD1LIN2WSQ-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The DESD1LIN2WSQ-7 belongs to Diodes' automotive-qualified TVS diode product line, designed specifically to meet stringent LIN bus ESD and surge immunity requirements in next-generation vehicle electronic control units.
FAQ
What is the maximum operating temperature for DESD1LIN2WSQ-7?
The DESD1LIN2WSQ-7 is rated for continuous operation from -55°C to +150°C junction temperature. Its thermal resistance (RθJA = 500°C/W) allows full-rated power dissipation up to +125°C ambient when mounted on a standard 2oz FR-4 PCB pad layout per Diodes' recommended footprint.
Does DESD1LIN2WSQ-7 require external biasing for LIN bus protection?
No. The DESD1LIN2WSQ-7 is inherently bidirectional and requires no external biasing or polarity configuration. Its symmetrical dual-Zener architecture provides automatic clamping for both positive and negative transients on the LIN data line, matching the bus's half-duplex signaling behavior.
How does the 13pF channel capacitance affect LIN communication timing?
At the standard LIN baud rate of 20.2 kbps, the 13pF typical capacitance introduces less than 5% rise-time degradation and negligible inter-symbol interference. This value was validated using TLP testing and waveform analysis per ISO 17987-4, confirming compliance with LIN physical layer timing margins.
Is DESD1LIN2WSQ-7 compatible with lead-free reflow profiles?
Yes. The device uses matte tin-plated Alloy 42 leads and complies with JEDEC J-STD-020 moisture sensitivity level 1. It withstands peak reflow temperatures up to 260°C for 30 seconds and is fully compatible with standard SnAgCu (SAC305) soldering profiles used in automotive PCB assembly.
DESD1LIN2WSQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- SC-76, SOD-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 25.4V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 160W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 13pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
DESD1LIN2WSQ-7 FAQ
1.How can I place an order for DESD1LIN2WSQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD1LIN2WSQ-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DESD1LIN2WSQ-7 reliable?
The price and inventory of DESD1LIN2WSQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD1LIN2WSQ-7 is usually 5 days.
3.What payment methods are accepted for DESD1LIN2WSQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD1LIN2WSQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD1LIN2WSQ-7?
DESD1LIN2WSQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD1LIN2WSQ-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DESD1LIN2WSQ-7?
For technical support, including DESD1LIN2WSQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD1LIN2WSQ-7 requirements.
6.How does Aetrix verify that DESD1LIN2WSQ-7 is sourced from the original manufacturer or authorized distributors?
All DESD1LIN2WSQ-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DESD1LIN2WSQ-7 meets industry standards.
7.What is the process for return or replacement of DESD1LIN2WSQ-7?
All DESD1LIN2WSQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DESD1LIN2WSQ-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DESD1LIN2WSQ-7 part is unused and in its original packaging.
Return procedure for DESD1LIN2WSQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DESD1LIN2WSQ-7 Tags
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Diodes Incorporated
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