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Home > Products > Integrated Circuits (ICs) > Linear > Video Processing

Semtech Corporation GS2978-CTE3

Name: GS2978-CTE3
Brand: Semtech Corporation
SKU: GS2978-CTE3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: GS2978-CTE3

Manufacturer:: Semtech Corporation

Category:: Video Processing

Package:: 16-VQFN Exposed Pad

Datasheet:: GS2978-CTE3.pdf

Description:: IC VIDEO CABLE DRIVER DUAL 16QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

GS2978-CTE3 from Semtech is a Transient Diverting Suppressor designed for high-energy EOS protection of 22V-rated power or data lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, 20mΩ dynamic resistance, and 175pF junction capacitance. It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O lines.

For engineers reviewing the GS2978-CTE3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for consistent voltage limiting, DFN-6 package layout compatibility, and compliance with IEC 61000-4-2/4-4/4-5 surge standards.

Technical Context

The GS2978-CTE3 uses a surge-rated FET as its primary protection element, activated by a 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 R_DS(on) under surge.

It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and reverse leakage ≤600nA at 22V. The device delivers 1120W peak pulse power (8/20μs) while maintaining 175pF capacitance at 22V/1MHz-critical for minimizing signal distortion on protected lines.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	22V - defines maximum continuous DC or RMS operating voltage on protected line without triggering
Clamping Voltage	27.5–28V at 40A (8/20μs) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges
Peak Pulse Current	40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements
ESD Withstand	±30kV contact & air (IEC 61000-4-2) - exceeds standard USB/Type-C ESD robustness requirements
Dynamic Resistance	20mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current
Junction Capacitance	175pF at 22V/1MHz - low enough to avoid signal integrity degradation on 22V power rails and medium-speed control lines

Pinout & Package

GS2978-CTE3 is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound and lead-free terminations.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	GND	Common ground connection points - all three must be soldered to maximize surge current return path and minimize inductance
4, 5, 6	IN	Protected line input - connected directly to VBus or power/data line requiring EOS suppression; all three pins conduct surge current in parallel

Key Features

Feature	Design Value
Constant-clamp architecture	Clamping voltage varies <0.5V from 24A to 40A and remains stable across −40°C to +125°C - eliminates thermal derating uncertainty in industrial environments
FET-based shunt topology	Replaces PN-junction TVS with low-R_DS(on) MOSFET - reduces energy dissipation in silicon junction and improves reliability under repeated surges
Low dynamic resistance	20mΩ measured between 1A–40A (8/20μs) - ensures minimal IR drop and predictable voltage limiting independent of surge magnitude
High EFT immunity	±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive fast transients common in motor drives and PLC I/O

Applications

USB Type-C Power Delivery Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting VBus lines in USB Type-C ports supporting up to 20V/5A PD negotiation where transient overvoltage could damage PD controllers or port power switches. IC Role / Device Role / Timing Role: Primary EOS suppressor placed at connector entry point, shunting surge energy to ground before it reaches downstream PMICs or load switches. Use Value: Maintains 27.5–28V clamping across full 40A surge and temperature range - avoids over-clamp failure modes seen with conventional TVS diodes at elevated ambient temperatures.	Use Scenario: Securing input terminals of industrial-grade load switches (e.g., HS2950P) used in remote meters, robotics, and factory automation equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Front-end transient protector that limits voltage stress on the load switch's internal FET gate oxide and drain-source junction during 1.2/50μs combination wave events. Use Value: Prevents premature failure of load switches by holding clamping voltage well below their absolute maximum V_DS rating (typically 30–40V), even at 125°C ambient.
IoT Device Power Rail Protection	Storage Device 22V Bus Protection
Use Scenario: Safeguarding 22V auxiliary power rails in battery-powered IoT edge nodes deployed in electrically noisy environments such as smart building gateways or agricultural sensors. IC Role / Device Role / Timing Role: Standalone EOS guard for unregulated or lightly regulated 22V supply paths feeding MCU peripherals, communication ICs, or sensor interfaces. Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint - enables compact, high-reliability designs without sacrificing protection margin or requiring multi-device stacking.	Use Scenario: Protecting 22V backup or auxiliary power inputs in enterprise SSDs, NVMe modules, and RAID controllers where bus overvoltage could corrupt flash memory or controller logic. IC Role / Device Role / Timing Role: High-energy transient limiter on storage subsystem power entry, coordinated with low-capacitance TVS arrays on high-speed data lanes. Use Value: Provides stable 27.5–28V clamping independent of pulse width or temperature - ensures consistent protection margin during sustained surges common in datacenter power distribution systems.

USB Type-C Power Delivery Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting VBus lines in USB Type-C ports supporting up to 20V/5A PD negotiation where transient overvoltage could damage PD controllers or port power switches.

IC Role / Device Role / Timing Role: Primary EOS suppressor placed at connector entry point, shunting surge energy to ground before it reaches downstream PMICs or load switches.

Use Value: Maintains 27.5–28V clamping across full 40A surge and temperature range - avoids over-clamp failure modes seen with conventional TVS diodes at elevated ambient temperatures.

Use Scenario: Securing input terminals of industrial-grade load switches (e.g., HS2950P) used in remote meters, robotics, and factory automation equipment exposed to lightning-induced surges.

IC Role / Device Role / Timing Role: Front-end transient protector that limits voltage stress on the load switch's internal FET gate oxide and drain-source junction during 1.2/50μs combination wave events.

Use Value: Prevents premature failure of load switches by holding clamping voltage well below their absolute maximum V_DS rating (typically 30–40V), even at 125°C ambient.

IoT Device Power Rail Protection

Storage Device 22V Bus Protection

Use Scenario: Safeguarding 22V auxiliary power rails in battery-powered IoT edge nodes deployed in electrically noisy environments such as smart building gateways or agricultural sensors.

IC Role / Device Role / Timing Role: Standalone EOS guard for unregulated or lightly regulated 22V supply paths feeding MCU peripherals, communication ICs, or sensor interfaces.

Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint - enables compact, high-reliability designs without sacrificing protection margin or requiring multi-device stacking.

Use Scenario: Protecting 22V backup or auxiliary power inputs in enterprise SSDs, NVMe modules, and RAID controllers where bus overvoltage could corrupt flash memory or controller logic.

IC Role / Device Role / Timing Role: High-energy transient limiter on storage subsystem power entry, coordinated with low-capacitance TVS arrays on high-speed data lanes.

Use Value: Provides stable 27.5–28V clamping independent of pulse width or temperature - ensures consistent protection margin during sustained surges common in datacenter power distribution systems.

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 pin-to-pin and functional replacement per Semtech documentation	No difference - validated for identical USB PD, load switch, and industrial I/O use cases	Select TDS2211P.C when sourcing from authorized Semtech distributors with full traceability and standard reel packaging (3,000 pcs/reel)
SP1003-02HTG	Higher working voltage (33V), lower clamping (27V @ 30A), 12pF capacitance - optimized for lower-voltage signal lines, not 22V power rails	Not suitable for 22V bus protection; intended for 3.3–5V data lines (e.g., USB 2.0, I²C) where ultra-low capacitance is critical	Choose SP1003-02HTG only for sub-5V signal-level protection; GS2978-CTE3 remains required for 22V power rail applications

Compared with TDS2211P.C (identical replacement) and SP1003-02HTG (lower-voltage alternative), GS2978-CTE3 provides guaranteed 22V operation, 40A surge rating, and temperature-stable clamping - making it the sole qualified option for industrial 22V bus protection where voltage margin and thermal robustness are non-negotiable.

Availability

GS2978-CTE3 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and 22V IoT power rail designs requiring stable component supply, long-term lifecycle support, and full compliance with IEC 61000-4-2/4-4/4-5 standards.

Supply support for GS2978-CTE3 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 connectivity solutions.

The GS2978-CTE3 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection applications demanding flat clamping, wide temperature stability, and high surge endurance.

FAQ

What is the maximum continuous operating voltage for GS2978-CTE3?

The GS2978-CTE3 has a reverse stand-off voltage (V_RWM) of 22V, meaning it can continuously block up to 22V DC or RMS without conducting. This makes GS2978-CTE3 appropriate for protecting 22V power rails, USB PD VBus lines, and other systems operating at or below this voltage threshold under normal conditions.

How does GS2978-CTE3 differ from standard TVS diodes in clamping behavior?

Unlike standard TVS diodes whose clamping voltage rises linearly with surge current (V_C = V_BR + I_PP × R_DYN), GS2978-CTE3 uses a triggered FET shunt that maintains near-constant clamping-27.5–28V-from 24A to 40A and across −40°C to +125°C. This behavior is confirmed in GS2978-CTE3's datasheet Figure 3 and eliminates thermal derating uncertainty in industrial deployments.

Is GS2978-CTE3 pin-compatible with TDS2211P.C?

Yes - GS2978-CTE3 is pin-compatible and functionally identical to TDS2211P.C, sharing the same DFN-6 package (1.6mm × 1.6mm), identical pin configuration (pins 1–3 = GND, pins 4–6 = IN), and matching electrical specifications including 22V V_RWM, 40A I_PP, and 27.5–28V clamping. Both are marked "T22" and supplied in 3,000-piece tape-and-reel format.

What PCB layout practices are recommended for optimal performance of GS2978-CTE3?

Place GS2978-CTE3 as close as possible to the protected connector. Connect all three IN pins (4,5,6) via a single low-inductance trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias. Avoid thermal pads - energy is dissipated internally, and excessive copper under the device adds parasitic inductance that degrades surge response.

Does GS2978-CTE3 meet IEC 61000-4-5 surge immunity requirements?

Yes - GS2978-CTE3 is rated for 40A peak pulse current with an 8/20μs waveform and ±1kV (1.2/50μs, R_S = 42Ω) on unsymmetrical lines, satisfying IEC 61000-4-5 Level 4 industrial surge immunity. Its 27.5–28V clamping at 40A ensures protected circuits remain within safe operating limits during standardized surge testing, as verified in GS2978-CTE3's Absolute Maximum Ratings and Electrical Characteristics tables.

GS2978-CTE3 Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: HD-LINX® III

Package/Case:: 16-VQFN Exposed Pad

Packaging:: Tape & Reel (TR)

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-CTE3 FAQ

1.How can I place an order for GS2978-CTE3 through Aetrix?

Please submit a Request for Quotation (RFQ) for GS2978-CTE3 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-CTE3 reliable?

The price and inventory of GS2978-CTE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS2978-CTE3 is usually 5 days.

3.What payment methods are accepted for GS2978-CTE3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS2978-CTE3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for GS2978-CTE3?

GS2978-CTE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your GS2978-CTE3 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-CTE3?

For technical support, including GS2978-CTE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS2978-CTE3 requirements.

6.How does Aetrix verify that GS2978-CTE3 is sourced from the original manufacturer or authorized distributors?

All GS2978-CTE3 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-CTE3 meets industry standards.

7.What is the process for return or replacement of GS2978-CTE3?

All GS2978-CTE3 units undergo pre-shipment inspection (PSI). If there is an issue with GS2978-CTE3, 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-CTE3 part is unused and in its original packaging.

Return procedure for GS2978-CTE3:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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