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Semtech Corporation SX1231JIMLTRT
- Part No.:
- SX1231JIMLTRT
- Manufacturer:
- Semtech Corporation
- Category:
- RF Transceiver ICs
- Package:
- 24-VQFN Exposed Pad
- Datasheet:
-
SX1231JIMLTRT.pdf
- Description:
- IC RF TXRX ISM<1GHZ 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,646
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Product details
Overview
SX1231JIMLTRT from Semtech is a Transient Diverting Suppressor (TDS) 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, and 20mΩ dynamic resistance. It protects USB Type-C power delivery buses and industrial load switch inputs.
For engineers reviewing the SX1231JIMLTRT 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 22V bus protection in USB PD, IoT, and industrial equipment designs.
Technical Context
The SX1231JIMLTRT 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 across 24–40A peak pulse current due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with stable 27.5–28V clamping at 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω), 22V reverse stand-off voltage, and 175pF junction capacitance at 22V/1MHz - enabling robust protection without signal integrity compromise in high-speed interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge events. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity standards without derating. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting, minimizing power dissipation and thermal stress during multi-amp transients. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with USB Type-C VBUS protection where high-frequency signal integrity is not impacted. |
| Operating Temperature | −40°C to +125°C - supports deployment in extended-temperature industrial and automotive under-hood applications. |
Pinout & Package
Package: DFN-6 (1.6mm × 1.6mm × 0.55mm), Pb-free, RoHS-compliant, UL 94V-0 molding compound, tape-and-reel packaging (3,000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to maximize current handling and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected input terminal for 22V bus or power line; parallel connection of all three pins ensures uniform current sharing and optimal 40A capability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A surge range - eliminates design margin inflation required with traditional TVS diodes. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - removes thermal derating calculations for industrial ambient conditions. |
| Low dynamic resistance | 20mΩ enables efficient energy diversion with <1.1W instantaneous power dissipation at 40A - reduces thermal stress on PCB and adjacent components. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated lightning-surge exposure per IEC 61000-4-5 without parameter shift. |
| Compact footprint | 1.6mm × 1.6mm DFN-6 saves >60% board area vs. SO-8 or SOT-23 TVS solutions - critical for space-constrained USB Type-C connectors and IoT modules. |
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, exposed to ESD and system-level surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller or load switch input. Use Value: Maintains 27.5V clamping at 40A and 125°C - prevents overvoltage damage to 24V-tolerant PD controllers without thermal derating. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Front-end transient suppressor absorbing lightning-induced surges before they reach the switch's internal FET. Use Value: Limits voltage across load switch drain-source to <28V during 1kV/42Ω surges - avoids gate oxide rupture and latch-up in high-side FETs. |
| IoT Edge Node Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways and cellular modems subjected to field ESD and induced transients. IC Role / Device Role / Timing Role: Single-component solution replacing multi-diode TVS arrays for compact, high-reliability rail clamping. Use Value: Delivers ±30kV ESD immunity and 40A surge handling in 2.56mm² footprint - enables conformal coating-compatible, maintenance-free deployments. |
Use Scenario: Protecting 22V supply inputs of NVMe SSD enclosures and enterprise storage backplanes against hot-plug transients and EFT bursts. IC Role / Device Role / Timing Role: Standalone transient suppressor on main power entry point, upstream of DC-DC converters and PMICs. Use Value: 175pF capacitance avoids resonance with bulk input capacitors; stable clamping prevents brownout resets during repetitive 4kV EFT events. |
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 (T22), and shared Semtech datasheet - functionally identical to SX1231JIMLTRT. | No functional difference; used interchangeably in USB PD reference designs and industrial schematics. | Select TDS2211P.C when sourcing from authorized Semtech distributors with standard part numbering conventions. |
| SP1003-02HTG | Lower 30A IPP rating, 33V clamping at 30A, higher 350pF capacitance, SOD-323 package - lacks temperature-stable clamping and FET-based architecture. | Suitable only for lower-energy 22V applications where 40A surge immunity and 125°C operation are not required. | Choose SP1003-02HTG only if board space allows larger SOD-323 and thermal derating is acceptable for ambient >85°C. |
Compared with SX1231JIMLTRT, TDS2211P.C offers identical performance and drop-in compatibility, while SP1003-02HTG trades clamping stability, surge capacity, and temperature resilience for legacy TVS familiarity - making SX1231JIMLTRT the preferred choice for next-gen USB PD and industrial 22V systems demanding consistent protection margins.
Availability
SX1231JIMLTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and IoT edge node power bus protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for SX1231JIMLTRT 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 semiconductors for power management, protection, sensing, and wireless infrastructure.
SX1231JIMLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping, temperature resilience, and compact size are critical.
FAQ
What is the exact package type and dimensions of SX1231JIMLTRT?
SX1231JIMLTRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed pad-less construction. Pin 1 is marked by a laser dot; pins 1–3 are GND, and pins 4–6 are IN. The land pattern follows Semtech's recommended 0.30mm pad width and 0.50mm pitch layout to ensure optimal thermal and surge performance for SX1231JIMLTRT.
Does SX1231JIMLTRT meet IEC 61000-4-5 surge immunity standards?
Yes, SX1231JIMLTRT is rated for 40A peak pulse current (8/20μs waveform) and withstands ±1kV combination wave surges (1.2/50μs voltage + 8/20μs current, RS = 42Ω), satisfying IEC 61000-4-5 Level 4 requirements for 22V systems. Its 27.5–28V clamping ensures protected circuits remain within safe operating limits during standardized surge testing of SX1231JIMLTRT.
How does SX1231JIMLTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SX1231JIMLTRT uses a triggered FET architecture that maintains clamping at 27.5–28V across 24–40A. This eliminates the need for oversized TVS selection to meet voltage thresholds - a key differentiator confirmed in Semtech's comparative clamping curves for SX1231JIMLTRT.
Can SX1231JIMLTRT be used for USB Type-C CC line protection?
No, SX1231JIMLTRT is not suitable for CC or SBU line protection due to its 175pF capacitance and 22V working voltage - USB CC lines require sub-0.5pF devices like uClamp2411ZA. SX1231JIMLTRT is specifically intended for VBUS or power rail protection; using it on CC lines would disrupt USB PD communication and violate USB-IF electrical specifications for SX1231JIMLTRT.
What is the maximum junction temperature and thermal derating behavior of SX1231JIMLTRT?
SX1231JIMLTRT has a junction temperature range of −55°C to +150°C and operates continuously from −40°C to +125°C. Crucially, its clamping voltage remains stable across this full range - no thermal derating of peak pulse current is required. Data shows <0.3V variation in VC from −40°C to +125°C at 40A, confirming robust thermal performance for SX1231JIMLTRT in uncontrolled environments.
SX1231JIMLTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 24-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- TxRx Only
- RF Family/Standard:
- General ISM < 1GHz
- Protocol:
- -
- Modulation:
- FSK, GFSK, GMSK, MSK, OOK
- Frequency:
- 424MHz ~ 510MHz, 862MHz ~ 1.02GHz
- Data Rate (Max):
- 300kbps
- Power - Output:
- 17dBm
- Sensitivity:
- -120dBm
- Memory Size:
- -
- Serial Interfaces:
- SPI
- GPIO:
- 6
- Voltage - Supply:
- 1.8V ~ 3.6V
- Current - Receiving:
- 16mA
- Current - Transmitting:
- 16mA ~ 95mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-QFN (5x5)
SX1231JIMLTRT FAQ
1.How can I place an order for SX1231JIMLTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SX1231JIMLTRT 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 SX1231JIMLTRT reliable?
The price and inventory of SX1231JIMLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SX1231JIMLTRT is usually 5 days.
3.What payment methods are accepted for SX1231JIMLTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SX1231JIMLTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SX1231JIMLTRT?
SX1231JIMLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SX1231JIMLTRT 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 SX1231JIMLTRT?
For technical support, including SX1231JIMLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SX1231JIMLTRT requirements.
6.How does Aetrix verify that SX1231JIMLTRT is sourced from the original manufacturer or authorized distributors?
All SX1231JIMLTRT 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 SX1231JIMLTRT meets industry standards.
7.What is the process for return or replacement of SX1231JIMLTRT?
All SX1231JIMLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SX1231JIMLTRT, 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 SX1231JIMLTRT part is unused and in its original packaging.
Return procedure for SX1231JIMLTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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