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Semtech Corporation GS2978-CNE3
- Part No.:
- GS2978-CNE3
- Manufacturer:
- Semtech Corporation
- Category:
- Video Processing
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
GS2978-CNE3.pdf
- Description:
- IC VIDEO CABLE DRIVER DUAL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,728
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Product details
Overview
GS2978-CNE3 from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance. It protects USB PD, Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the GS2978-CNE3 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and direct alternatives for 22V bus protection design.
Technical Context
The GS2978-CNE3 uses a surge-rated FET as its primary protection element, activated by an integrated precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-from 24A to 40A and across −40°C to +125°C due to decreasing RDS(on) under surge.
It operates with reverse stand-off voltage (VRWM) of 22V, breakdown voltage (VBR) of 25–27.9V at 1mA, and exhibits only 175pF junction capacitance at 22V/1MHz-enabling use on high-speed power rails without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD VBus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of common load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and consumer ESD robustness standards. |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot during fast transients, critical for protecting sensitive gate drivers. |
| Junction Capacitance | 175pF at 22V/1MHz - minimal impact on power rail rise/fall times and compatible with fast-switching DC-DC converters. |
Pinout & Package
GS2978-CNE3 is housed in a compact, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals are required for full 40A surge rating: pins 1–3 form a low-inductance ground plane; pins 4–6 serve as parallel-connected input terminals to the protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path - must be connected together and to PCB ground plane via multiple vias to minimize surge loop inductance. |
| 4, 5, 6 | IN | Parallel-connected input terminals - all three must be tied directly to the protected bus (e.g., USB PD VBus) for rated 40A capability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for over-spec'ed IPP margin to meet voltage safety limits. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - ensures consistent protection in automotive under-hood or industrial ambient conditions. |
| Low dynamic resistance | 20mΩ - reduces voltage overshoot during sub-microsecond ESD events, improving immunity against latch-up in downstream ICs. |
| High-energy dissipation | 1120W peak pulse power - handles repeated lightning-induced surges without degradation, unlike standard TVS diodes. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the VBus line of a USB Type-C port supporting up to 20V/5A PD negotiation in notebooks and docking stations. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and PD controller/load switch, clamping transients before they reach silicon. Use Value: Maintains 27.5–28V clamping across full temperature range, preventing false OVP trips and ensuring reliable PD communication during surge events. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters and robotics control modules exposed to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Front-end transient shunt that diverts surge energy away from the load switch's internal MOSFET drain-source junction. Use Value: Keeps clamping voltage below 30V - well under typical 35V absolute max rating of industrial load switches - avoiding permanent gate oxide damage. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing the main 22V input rail of battery-backed IoT gateways deployed in unshielded outdoor enclosures. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge protection per IEC 61000-4-2/4-4/4-5. Use Value: Delivers ±4kV EFT immunity and 40A surge handling in <2.6mm² footprint - enabling compact, certified edge hardware without external RC networks. |
Use Scenario: Protecting the 22V auxiliary supply rail feeding NVMe SSD backup capacitors and controller logic in enterprise storage arrays. IC Role / Device Role / Timing Role: High-reliability transient suppressor placed upstream of DC-DC regulators and LDOs powering flash memory subsystems. Use Value: 175pF capacitance avoids resonance with bulk input caps; stable clamping prevents brownout resets during repetitive 1.2/50μs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN-6 package, identical marking code "T22" - confirmed drop-in replacement per Semtech ordering documentation. | No functional difference; validated for USB PD, load switch, and industrial 22V rail use cases. | Select TDS2211P.C when requiring Semtech's standard commercial-grade tape-and-reel packaging (3,000 pcs/reel). |
| uClamp2411ZA | 24V working voltage, lower 22A IPP rating, higher 32V clamping at 20A, and 12pF capacitance - optimized for CC/SBU lines, not power rails. | Intended for low-capacitance data-line protection; unsuitable for 40A surge or 22V bus clamping due to voltage and current limitations. | Use uClamp2411ZA only for auxiliary signal lines (CC, SBU); GS2978-CNE3 remains mandatory for VBus and power-rail protection. |
Compared with TDS2211P.C, GS2978-CNE3 offers identical performance and fit; versus uClamp2411ZA, it delivers 82% higher surge current capacity and 22% lower clamping voltage-making it the sole viable option for 22V power rail EOS hardening.
Availability
GS2978-CNE3 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for GS2978-CNE3 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
The GS2978-CNE3 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power rail protection where stable clamping and temperature resilience are critical.
FAQ
What is the exact package type and dimensions of GS2978-CNE3?
GS2978-CNE3 uses a DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with no thermal pad requirement. Pins 1–3 are GND; pins 4–6 are IN. The land pattern follows Semtech's recommended 0.30mm pitch, 0.50mm pad width, and 0.65mm pad length per their outline drawing Rev 2.5.
Does GS2978-CNE3 meet IEC 61000-4-5 surge immunity requirements?
Yes, GS2978-CNE3 is rated for 40A peak pulse current with 8/20μs waveform and complies with IEC 61000-4-5 Level 4 (±1kV, 1.2/50μs voltage / 8/20μs current, RS = 42Ω). Its 27.5–28V clamping ensures protected circuits remain within safe operating voltage during full-rated surge events.
How does GS2978-CNE3 differ from standard TVS diodes in clamping behavior?
Unlike TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), GS2978-CNE3 maintains near-constant clamping (27.5–28V) from 24A to 40A due to its FET-based shunt architecture and decreasing RDS(on). This eliminates design margin uncertainty caused by temperature- and current-dependent voltage overshoot.
Can GS2978-CNE3 be used on USB Type-C superspeed differential pairs?
No, GS2978-CNE3 is not suitable for USB SS TX/RX lines. Its 175pF junction capacitance would severely degrade signal integrity. For superspeed lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); GS2978-CNE3 is intended exclusively for VBus and other power/data lines with ≤22V DC bias.
What is the maximum operating temperature range for GS2978-CNE3?
GS2978-CNE3 is specified for continuous operation from −40°C to +125°C ambient. Its clamping voltage remains stable across this full range-27.5–28V at 40A-as confirmed in Figure 3 of the TDS2211P datasheet, which applies identically to GS2978-CNE3 per Semtech's product family documentation.
GS2978-CNE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- HD-LINX® III
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Driver
- Applications:
- Professional Video
- Standards:
- SMPTE
- Control Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-QFN (4x4)
GS2978-CNE3 FAQ
1.How can I place an order for GS2978-CNE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for GS2978-CNE3 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 GS2978-CNE3 reliable?
The price and inventory of GS2978-CNE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS2978-CNE3 is usually 5 days.
3.What payment methods are accepted for GS2978-CNE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS2978-CNE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GS2978-CNE3?
GS2978-CNE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GS2978-CNE3 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 GS2978-CNE3?
For technical support, including GS2978-CNE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS2978-CNE3 requirements.
6.How does Aetrix verify that GS2978-CNE3 is sourced from the original manufacturer or authorized distributors?
All GS2978-CNE3 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 GS2978-CNE3 meets industry standards.
7.What is the process for return or replacement of GS2978-CNE3?
All GS2978-CNE3 units undergo pre-shipment inspection (PSI). If there is an issue with GS2978-CNE3, 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 GS2978-CNE3 part is unused and in its original packaging.
Return procedure for GS2978-CNE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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