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Diodes Incorporated SD09CQ-7
- Part No.:
- SD09CQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD09CQ-7.pdf
- Description:
- GENERAL PROTECTION PP SOD323 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:3,292
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Product details
Overview
SD09CQ-7 from Diodes Incorporated is a bidirectional 400W transient voltage suppression (TVS) diode designed for ESD protection of high-speed data lines in portable electronics. It features a 9.0V reverse standoff voltage, ±30kV IEC 61000-4-2 contact/air ESD rating, 68pF typical channel capacitance, and 14.5V clamping voltage at 1A, making it suitable for USB 2.0, HDMI, and audio jack interfaces in smartphones and digital cameras.
For engineers reviewing the SD09CQ-7 datasheet, SD09CQ-7 pinout, SD09CQ-7 application, or SD09CQ-7 equivalent, key selection criteria include low clamping voltage under 20A surge, sub-70pF input capacitance for signal integrity, bidirectional polarity for AC-coupled lines, and AEC-Q101 qualification for automotive infotainment interfaces.
Technical Context
This TVS diode operates in bidirectional avalanche breakdown mode to clamp transient overvoltages across two terminals without polarity dependence. Its 10V minimum breakdown voltage ensures reliable triggering above normal operating rails while maintaining low leakage (<1µA at 9.0V).
The device uses silicon planar construction in an SOD323 package with matte tin-plated alloy 42 leadframe, enabling robust 8/20µs surge handling up to 20A and TLP-rated clamping of 17.3V at 16A (10/100ns), critical for protecting high-frequency analog and digital I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains lightning-surge-level transients per IEC 61000-4-5 without failure |
| Clamping Voltage (IPP = 20A) | 20.0V - limits downstream IC voltage stress during worst-case 8/20µs surges |
| Channel Capacitance | 68pF - preserves signal integrity on USB 2.0 (480Mbps) and audio paths |
| ESD Rating | ±30kV air/contact - exceeds IEC 61000-4-2 Level 4 for handheld device reliability |
| Reverse Standoff Voltage | 9.0V - sets maximum continuous working voltage before conduction begins |
| Breakdown Voltage | 10.0V @ 1mA - defines precise turn-on threshold for predictable clamping onset |
| Thermal Resistance | 500°C/W - requires minimal PCB copper area for thermal management in space-constrained layouts |
Pinout & Package
Package: SOD323 - surface-mount plastic package measuring 1.30mm × 1.70mm × 0.90mm (L × W × H), moisture sensitivity level 1, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (Bidirectional Terminal A) | Connects to protected line (e.g., USB D+); forms symmetrical avalanche path with Pin 2 |
| Pin 2 | Cathode (Bidirectional Terminal B) | Connects to ground or reference plane; completes low-inductance clamping loop for fast transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional ESD Protection | Enables single-device protection of AC-coupled differential pairs (e.g., USB, HDMI) without polarity concerns |
| Ultra-Low Input Capacitance | 68pF minimizes signal distortion and insertion loss on 480Mbps USB 2.0 and 24MHz audio interfaces |
| AEC-Q101 Qualification | Validated for automotive infotainment systems requiring PPAP documentation and IATF 16949 manufacturing control |
| Lead-Free & Halogen-Free | Meets RoHS 3 (2015/863/EU) and "Green" definition (<900ppm Br/Cl, <1000ppm Sb) for eco-compliant designs |
| Low Clamping Voltage | 14.5V at 1A ensures logic-level ICs (e.g., 3.3V/5V microcontrollers) remain within safe operating area during ESD events |
Applications
| Smartphone Front-Panel Interfaces | Automotive Infotainment USB Ports |
|---|---|
Use Scenario: Protecting touchscreen controller I²C lines and headphone jack mic/sense inputs from user-hand ESD. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt ESD current before reaching ASIC GPIOs. Use Value: 68pF capacitance avoids degrading 400kHz I²C rise time; ±30kV rating prevents field failures in drop-tested handsets. | Use Scenario: Safeguarding USB 2.0 data lines in head-unit docking stations exposed to cabin ESD during plug/unplug cycles. IC Role / Device Role / Timing Role: Low-capacitance TVS integrated into USB receptacle footprint to maintain signal integrity up to 480Mbps. Use Value: AEC-Q101 qualification ensures reliability across -40°C to +125°C ambient; 20.0V clamping protects USB PHY transceivers during 20A surge events. |
| Digital Camera HDMI Outputs | Portable Audio DAC Headphone Jacks |
Use Scenario: Shielding mini-HDMI connectors on DSLR bodies from ESD during cable mating in studio environments. IC Role / Device Role / Timing Role: Two-channel TVS array (using dual SD09CQ-7) placed at HDMI source-side connector to clamp TMDS clock/data lines. Use Value: Sub-70pF capacitance prevents HDMI 1.4 eye diagram closure; bidirectional operation matches AC-coupled TMDS signaling. | Use Scenario: ESD protection of 3.5mm TRRS jack mic and ground sense lines in Bluetooth headphones. IC Role / Device Role / Timing Role: Single SD09CQ-7 bridging mic bias line to ground to suppress contact discharge without loading DC bias. Use Value: 1µA leakage at 9.0V avoids shifting mic amplifier operating point; 14.5V clamping prevents ADC saturation during ±30kV events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Unidirectional; higher 100pF capacitance; 1500W peak power | Requires polarity-aware layout; unsuitable for AC-coupled lines like USB/HDMI | Select only when unidirectional protection suffices and board space allows larger SMA package |
| TPD2E001DRYR | 2-channel array; 12pF per channel; lower 240W peak power | Optimized for ultra-high-speed interfaces (USB 3.0, DisplayPort); not AEC-Q101 qualified | Prefer for multi-line protection where capacitance <15pF is mandatory, but avoid in automotive-grade designs |
Compared with SMAJ9.0A and TPD2E001DRYR, SD09CQ-7 uniquely balances bidirectional capability, 68pF capacitance, AEC-Q101 compliance, and SOD323 footprint-making it optimal for cost-sensitive, space-constrained, and automotive-qualified portable interface protection.
Availability
SD09CQ-7 is available at Aetrix Electronics and suitable for smartphone front-panel interfaces, automotive infotainment USB ports, and digital camera HDMI outputs requiring stable component supply across high-volume consumer and automotive production programs.
Supply support for SD09CQ-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 SD09CQ belongs to Diodes' TVS Diode family engineered specifically for high-reliability ESD protection in portable and automotive electronics, emphasizing low capacitance, bidirectional symmetry, and rigorous qualification for harsh environments.
FAQ
What is the maximum clamping voltage of SD09CQ-7 at 20A surge current?
The SD09CQ-7 exhibits a maximum clamping voltage of 20.0V under 8/20µs surge conditions at 20A peak pulse current, as specified in the Electrical Characteristics table. This value ensures protected ICs remain below absolute maximum ratings during worst-case lightning-induced transients, and is validated via standardized waveform testing per IEC 61000-4-5.
Is SD09CQ-7 suitable for USB 2.0 data line protection?
Yes, SD09CQ-7 is explicitly suited for USB 2.0 data line protection due to its 68pF typical channel capacitance, which maintains signal integrity at 480Mbps without violating USB 2.0 eye diagram masks, and its bidirectional configuration matching the AC-coupled nature of D+/D− differential pairs.
Does SD09CQ-7 require special PCB layout considerations?
Yes-optimal performance requires short, direct traces between the TVS pins and protected line/ground, minimal loop area, and adherence to Diodes' recommended SOD323 pad layout (available in package outline PDFs). Thermal relief on ground pads should be avoided to ensure low-inductance surge current return paths and effective heat dissipation during repetitive pulses.
How does AEC-Q101 qualification impact SD09CQ-7's use in automotive designs?
AEC-Q101 qualification confirms SD09CQ-7 has passed accelerated stress tests-including temperature cycling, humidity bias, and ESD-specifically for discrete semiconductors in automotive environments. This enables its use in infotainment, ADAS, and body electronics without additional component-level qualification, provided system-level PPAP documentation and IATF 16949 manufacturing traceability are maintained.
SD09CQ-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):
- 9V (Max)
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 20V
- Current - Peak Pulse (10/1000µs):
- 20A (8/20µs)
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 68pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD09CQ-7 FAQ
1.How can I place an order for SD09CQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD09CQ-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 SD09CQ-7 reliable?
The price and inventory of SD09CQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD09CQ-7 is usually 5 days.
3.What payment methods are accepted for SD09CQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD09CQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD09CQ-7?
SD09CQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD09CQ-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 SD09CQ-7?
For technical support, including SD09CQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD09CQ-7 requirements.
6.How does Aetrix verify that SD09CQ-7 is sourced from the original manufacturer or authorized distributors?
All SD09CQ-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 SD09CQ-7 meets industry standards.
7.What is the process for return or replacement of SD09CQ-7?
All SD09CQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD09CQ-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 SD09CQ-7 part is unused and in its original packaging.
Return procedure for SD09CQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD09CQ-7 Tags
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