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Semtech Corporation SM1211E915TOPIC
- Part No.:
- SM1211E915TOPIC
- Manufacturer:
- Semtech Corporation
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
SM1211E915TOPIC.pdf
- Description:
- KIT PICTAIL EXT FOR SX1211
- Quantity:
- Payment:
- Shipping:
Inventory:4,307
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Product details
Overview
SM1211E915TOPIC from Semtech is a Transient Diverting Suppressor 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 and Type-C VBus lines in industrial and portable electronics.
For engineers reviewing the SM1211E915TOPIC datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for load-switch input and USB interface protection.
Technical Context
The SM1211E915TOPIC 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. Its clamping voltage remains nearly constant across 24–40A (8/20μs) due to decreasing RDS(on), unlike conventional TVS diodes whose VC rises linearly with IPP.
It operates from −40°C to +125°C with stable 27.5–28V clamping at 40A, 22V reverse stand-off voltage, and only 175pF junction capacitance at 22V - enabling use on high-speed power rails without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches USB PD 20V nominal bus with 2V margin; avoids false triggering during normal operation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below typical 28–30V damage threshold of USB PD controllers and load switches. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD endpoints. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external staging. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting, minimizing energy dissipation in the protected IC's input stage. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for DC power rail protection without affecting load-switch response or PD negotiation timing. |
| Operating Temp | −40°C to +125°C - supports extended-range industrial, automotive accessory, and outdoor IoT deployments. |
Pinout & Package
SM1211E915TOPIC is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals are surface-mount; pins 1–3 form a common ground plane, and pins 4–6 serve as parallel-connected input terminals for optimal surge current sharing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path; all three must be connected to PCB ground plane via multiple vias to minimize inductance and maximize 40A surge handling. |
| 4, 5, 6 | IN | Parallel-connected input node for protected line (e.g., USB PD VBus); all three pins carry equal surge current share and must be routed as single low-inductance trace to connector. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A range - eliminates derating for high-current surges and simplifies worst-case margin analysis. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - removes thermal derating overhead required for standard TVS diodes. |
| Low dynamic resistance | 20mΩ enables <1V IR drop at 40A - prevents upstream voltage sag that could reset load switches or PD controllers during surge events. |
| High-energy EOS handling | 1120W peak pulse power rating - sustains multi-millisecond transients (e.g., lightning-induced ring waves) without latch-up or parametric shift. |
| DFN-6 space efficiency | 1.6mm × 1.6mm footprint saves >60% board area vs. SO-8 TVS solutions - critical for compact USB Type-C receptacles and wearable power modules. |
Applications
| USB Type-C Power Delivery Bus 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 against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Transient Diverting Suppressor placed directly at the Type-C connector, shunting EOS energy to ground before it reaches the PD controller or buck converter. Use Value: Maintains 27.5V clamping at 40A and 125°C - ensures PD controller survival where standard TVS would clamp >35V under same conditions. |
Use Scenario: Safeguarding the input of an industrial-grade load switch (e.g., HS2950P) powering sensors, actuators, or remote meters exposed to 4kV EFT or 1kV surge events. IC Role / Device Role / Timing Role: Primary front-end protector absorbing surge energy before it stresses the load switch's internal MOSFET gate oxide or drain-source junction. Use Value: 20mΩ RDYN limits voltage overshoot to <1V during 40A transients - prevents overvoltage damage to the load switch's OVP/UVLO comparators and internal logic. |
| IoT Edge Device Power Rail Protection | Tablet/Notebook VBus Line Protection |
|
Use Scenario: Securing the main 22V input rail of battery-powered IoT gateways deployed in uncontrolled environments (e.g., smart agriculture nodes, building automation sensors). IC Role / Device Role / Timing Role: Standalone EOS suppressor on the DC input path, operating alongside low-capacitance TVS for data lines and e-fuse for overcurrent. Use Value: −40°C to +125°C operational range and ±30kV ESD rating ensure reliable field operation without thermal shutdown or parametric drift. |
Use Scenario: Protecting the VBus line of ultraportable notebooks and tablets with USB-C charging, where board space and thermal constraints limit traditional TVS options. IC Role / Device Role / Timing Role: Compact DFN-6 suppressor mounted adjacent to the USB-C connector, minimizing trace inductance and preserving PD negotiation timing integrity. Use Value: 1.6mm × 1.6mm footprint and 175pF capacitance enable integration without compromising PD handshake speed or causing voltage droop during fast-load transients. |
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"; manufactured by Semtech as direct variant. | No functional difference - used interchangeably in USB PD reference designs and industrial schematics. | Select TDS2211P.C when sourcing from authorized Semtech distributors with full traceability and date-code visibility. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 33V clamping at 24A, and 12pF capacitance - optimized for CC/SBU lines, not VBus. | Designed for low-capacitance data-line protection; unsuitable for 22V power rail due to insufficient IPP and excessive clamping. | Use uClamp2411ZA only for CC/SBU or DP/DM lines; SM1211E915TOPIC remains mandatory for VBus-level protection. |
Compared with TDS2211P.C (identical function and form) and uClamp2411ZA (lower-energy, data-line focused), SM1211E915TOPIC uniquely delivers 40A surge handling with sub-28V clamping at 125°C - making it the sole suitable choice for high-reliability 22V power rail protection in USB PD and industrial load-switch applications.
Availability
SM1211E915TOPIC is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load-switch inputs, and IoT edge-device power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for SM1211E915TOPIC 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 high-performance analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The TDS (Transient Diverting Suppressor) product line was engineered to replace conventional TVS diodes in high-energy EOS applications, delivering flat clamping, temperature stability, and FET-based surge handling for USB PD, industrial power, and ruggedized IoT interfaces.
FAQ
What is the maximum clamping voltage of SM1211E915TOPIC at 40A surge current?
The SM1211E915TOPIC clamps at 27.5–28V under 40A peak pulse current (8/20μs waveform), as specified in its electrical characteristics table. This value is guaranteed across −40°C to +125°C and reflects the device's constant-clamp architecture using a surge-rated FET, not a conventional TVS diode junction.
Is SM1211E915TOPIC pin-compatible with TDS2211P.C?
Yes - SM1211E915TOPIC shares identical pin configuration (DFN-6, pins 1–3 = GND, pins 4–6 = IN), mechanical dimensions (1.6mm × 1.6mm × 0.55mm), and marking code "T22" with TDS2211P.C. Both are manufactured by Semtech and validated for drop-in replacement in USB PD and industrial schematics.
Can SM1211E915TOPIC protect USB Type-C CC lines?
No - SM1211E915TOPIC is rated for 22V working voltage and optimized for high-current power rail protection (e.g., VBus), not low-voltage, low-capacitance data lines. For CC/SBU protection, Semtech specifies uClamp2411ZA (12pF, 24V), which SM1211E915TOPIC cannot substitute due to its 175pF capacitance and 40A surge rating.
What is the junction capacitance of SM1211E915TOPIC at 22V bias?
The SM1211E915TOPIC exhibits 175pF junction capacitance at VR = 22V and f = 1MHz, per its datasheet electrical characteristics. This value remains stable across temperature and makes the device suitable for DC power rail protection but unsuitable for high-speed differential signal lines like USB SS or PCIe.
Does SM1211E915TOPIC require a thermal pad or heatsink?
No - SM1211E915TOPIC dissipates surge energy in its integrated FET channel, not the silicon junction, and does not require a thermal pad. The DFN-6 package relies on low-inductance GND connections (pins 1–3) and short PCB traces to ground for effective energy diversion; no additional thermal management is specified or needed.
SM1211E915TOPIC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Type:
- Transceiver
- Frequency:
- 915MHz
- Contents:
- Board(s)
- Utilized IC / Part:
- SX1211
SM1211E915TOPIC FAQ
1.How can I place an order for SM1211E915TOPIC through Aetrix?
Please submit a Request for Quotation (RFQ) for SM1211E915TOPIC 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 SM1211E915TOPIC reliable?
The price and inventory of SM1211E915TOPIC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM1211E915TOPIC is usually 5 days.
3.What payment methods are accepted for SM1211E915TOPIC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM1211E915TOPIC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM1211E915TOPIC?
SM1211E915TOPIC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM1211E915TOPIC 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 SM1211E915TOPIC?
For technical support, including SM1211E915TOPIC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM1211E915TOPIC requirements.
6.How does Aetrix verify that SM1211E915TOPIC is sourced from the original manufacturer or authorized distributors?
All SM1211E915TOPIC 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 SM1211E915TOPIC meets industry standards.
7.What is the process for return or replacement of SM1211E915TOPIC?
All SM1211E915TOPIC units undergo pre-shipment inspection (PSI). If there is an issue with SM1211E915TOPIC, 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 SM1211E915TOPIC part is unused and in its original packaging.
Return procedure for SM1211E915TOPIC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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