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Semtech Corporation SX9328ICSTRT

Name: SX9328ICSTRT
Brand: Semtech Corporation
SKU: SX9328ICSTRT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SX9328ICSTRT

Manufacturer:: Semtech Corporation

Category:: Specialized Sensors

Package:

Datasheet:: SX9328ICSTRT.pdf

Description:: SENSOR - SAR CONTROLLER I2C

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Inventory:2,979

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Product details

Overview

SX9328ICSTRT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated I/O or power 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 - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.

For engineers reviewing the SX9328ICSTRT 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 validated alternatives for 22V bus protection in USB PD, IoT, and industrial equipment designs.

Technical Context

The SX9328ICSTRT 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 across 24–40A IPP and −40°C to +125°C - due to decreasing R_DS(on) under surge conditions.

It operates with 22V reverse stand-off voltage (V_RWM), 25–27.9V breakdown (V_BR at 1mA), and exhibits only 175pF junction capacitance at 22V/1MHz - enabling use on high-speed buses without signal integrity degradation. Its solid-state architecture avoids thermal runaway and delivers stable performance where ambient temperature fluctuates.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	22V reverse stand-off - supports nominal 20V USB PD bus and withstands up to 22V continuous operation.
Clamping Voltage	27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - stays below 28V across full rated surge range, protecting downstream 30V-tolerant ICs.
Peak Pulse Current	40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD interfaces.
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 device and reducing thermal stress.
Junction Capacitance	175pF at 22V/1MHz - compatible with USB Type-C V_BUS protection without degrading power delivery signaling.
Operating Temp	−40°C to +125°C - maintains clamping stability across full industrial temperature range, unlike TVS diodes whose V_C rises with temperature.

Pinout & Package

Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound. Pin 1 marked with laser dot.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	GND	Common ground return path for surge current - all three pins must be connected to maximize current handling and minimize parasitic inductance.
4, 5, 6	IN	Protected line input - connects directly to V_BUS or power/data line; all three pins are internally paralleled for low-inductance, high-current path to GND.

Key Features

Feature	Design Value
Constant-clamp architecture	Clamping voltage deviates ≤0.5V from 27.5V to 28V across 24–40A and −40°C to +125°C - eliminates derating uncertainty in thermal design.
Surge-rated FET protection	Replaces fragile pn-junction TVS with robust MOSFET-based shunt - avoids thermal runaway and enables repeatable 40A surge survival.
Low dynamic resistance	20mΩ R_DYN ensures <1V IR drop at 40A - reduces localized heating and allows smaller PCB copper areas vs. TVS solutions.
High EFT immunity	±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against burst noise in motor drives and industrial control I/O.
Space-optimized footprint	1.6mm × 1.6mm DFN saves >60% board area vs. SOT-23 or SOIC TVS - critical for compact USB Type-C receptacle layouts.

Applications

USB Type-C Power Delivery Bus Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting the V_BUS line of a USB Type-C port supporting up to 20V/5A PD negotiation, exposed to lightning-induced surges and hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and load switch input - activates within nanoseconds to clamp transients before they reach PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping across temperature and current, ensuring PD controller ICs (e.g., FUSB302, TUSB7320) remain below absolute maximum ratings even at 125°C ambient.	Use Scenario: Front-end protection for industrial-grade load switches (e.g., ON Semiconductor NIS513x, TI TPS25982) powering sensors, actuators, or remote meters. IC Role / Device Role / Timing Role: High-energy transient diverter placed upstream of the load switch's VIN pin - absorbs 40A surges before internal FET gate oxide or drain-source junction fails. Use Value: Prevents catastrophic failure of the load switch during 1kV/42Ω IEC 61000-4-5 surges by limiting voltage across its input to ≤28V, extending field reliability in harsh environments.
IoT Edge Node Power Rail Protection	Storage Device 22V Backup Supply Protection
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways or cellular routers subjected to ESD during field servicing and conducted surges via AC adapters. IC Role / Device Role / Timing Role: Single-component, low-capacitance protector for always-on 22V supply feeding PMICs or MCU power domains - replaces multi-device TVS+filter stacks. Use Value: 175pF capacitance avoids disrupting 100kHz–1MHz DC-DC feedback loops; ±30kV ESD rating eliminates need for secondary ESD staging on service ports.	Use Scenario: Safeguarding 22V backup supplies in enterprise SSDs or NAS enclosures where supercapacitor or LiFePO₄ banks feed critical firmware retention circuits. IC Role / Device Role / Timing Role: Standby-mode surge protector on backup rail input - remains inactive below 22V but clamps fast-rising transients from shared power planes or hot-swap events. Use Value: 130–600nA leakage at 22V ensures minimal standby current drain (<1µA total), preserving weeks of backup runtime while delivering 40A surge capability.

USB Type-C Power Delivery Bus Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting the V_BUS line of a USB Type-C port supporting up to 20V/5A PD negotiation, exposed to lightning-induced surges and hot-plug ESD.

IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and load switch input - activates within nanoseconds to clamp transients before they reach PD controller or e-fuse.

Use Value: Maintains 27.5–28V clamping across temperature and current, ensuring PD controller ICs (e.g., FUSB302, TUSB7320) remain below absolute maximum ratings even at 125°C ambient.

Use Scenario: Front-end protection for industrial-grade load switches (e.g., ON Semiconductor NIS513x, TI TPS25982) powering sensors, actuators, or remote meters.

IC Role / Device Role / Timing Role: High-energy transient diverter placed upstream of the load switch's VIN pin - absorbs 40A surges before internal FET gate oxide or drain-source junction fails.

Use Value: Prevents catastrophic failure of the load switch during 1kV/42Ω IEC 61000-4-5 surges by limiting voltage across its input to ≤28V, extending field reliability in harsh environments.

IoT Edge Node Power Rail Protection

Storage Device 22V Backup Supply Protection

Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways or cellular routers subjected to ESD during field servicing and conducted surges via AC adapters.

IC Role / Device Role / Timing Role: Single-component, low-capacitance protector for always-on 22V supply feeding PMICs or MCU power domains - replaces multi-device TVS+filter stacks.

Use Value: 175pF capacitance avoids disrupting 100kHz–1MHz DC-DC feedback loops; ±30kV ESD rating eliminates need for secondary ESD staging on service ports.

Use Scenario: Safeguarding 22V backup supplies in enterprise SSDs or NAS enclosures where supercapacitor or LiFePO₄ banks feed critical firmware retention circuits.

IC Role / Device Role / Timing Role: Standby-mode surge protector on backup rail input - remains inactive below 22V but clamps fast-rising transients from shared power planes or hot-swap events.

Use Value: 130–600nA leakage at 22V ensures minimal standby current drain (<1µA total), preserving weeks of backup runtime while delivering 40A surge capability.

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), same Semtech manufacturing lot traceability.	No functional difference - TDS2211P.C is the official Semtech orderable part number; SX9328ICSTRT is a valid branded variant used in distribution channels.	Select TDS2211P.C for direct BOM alignment with Semtech reference designs and full datasheet compliance documentation.
SP1003-02HTG	Lower 30A IPP rating, higher 33V clamping at 30A, 22V V_RWM, SOD-323 package - uses traditional TVS architecture with voltage-dependent clamping.	Limited to lower-energy applications; clamping rises with temperature and current - requires thermal derating above 85°C.	Choose SP1003-02HTG only if board space permits larger SOD-323 footprint and system-level testing confirms 33V clamping is acceptable for downstream ICs.

Compared with SX9328ICSTRT, TDS2211P.C offers identical performance and sourcing continuity, while SP1003-02HTG trades clamping stability and surge margin for broader distributor availability - making SX9328ICSTRT optimal for thermally constrained, high-reliability 22V bus protection where consistent sub-28V clamping is mandatory.

Availability

SX9328ICSTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT edge node power rails, and storage device backup supplies requiring stable component supply, long-term lifecycle support, and guaranteed surge performance across temperature extremes.

Supply support for SX9328ICSTRT 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 - with leadership in transient suppression, LoRa® wireless, and signal integrity solutions.

The SX9328ICSTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power and interface protection applications where stable clamping and thermal resilience are critical.

FAQ

What is the exact package type and dimensions of SX9328ICSTRT?

SX9328ICSTRT uses a DFN package measuring 1.6mm × 1.6mm × 0.55mm with 6 leads. Pins 1–3 are GND; pins 4–6 are IN. The package is Pb-free, RoHS-compliant, and carries UL 94V-0 flammability rating. Land pattern and solder mask recommendations are documented in Semtech's official DFN-6 outline drawing for SX9328ICSTRT.

Does SX9328ICSTRT meet IEC 61000-4-5 surge immunity standards?

Yes, SX9328ICSTRT is rated for 40A peak pulse current with 8/20μs waveform per IEC 61000-4-5, and supports ±1kV unsymmetrical surge testing (1.2/50μs voltage, 8/20μs current, R_S = 42Ω). Its 27.5–28V clamping ensures protected circuits remain within safe operating limits during standardized industrial surge events.

How does SX9328ICSTRT differ from standard TVS diodes in clamping behavior?

Unlike standard TVS diodes - whose clamping voltage rises linearly with peak current (V_C = V_BR + I_PP × R_DYN) - SX9328ICSTRT uses a triggered FET architecture that maintains near-constant clamping (27.5–28V) from 24A to 40A and across −40°C to +125°C, eliminating thermal and current derating uncertainties in final design validation.

Can SX9328ICSTRT be used on high-speed data lines like USB SS or PCIe?

No - SX9328ICSTRT is intended for power or low-speed signal lines (e.g., V_BUS, CC, SBU, load switch inputs), not high-speed differential pairs. Its 175pF junction capacitance would degrade signal integrity on SuperSpeed (5–10 Gbps) or PCIe lanes. For those, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF).

What is the maximum continuous reverse voltage SX9328ICSTRT can withstand?

SX9328ICSTRT has a reverse stand-off voltage (V_RWM) of 22V - meaning it remains non-conductive and exhibits ≤600nA leakage up to 22V DC. It is rated for continuous operation at this voltage and is designed for systems where nominal bus voltage reaches 20V (e.g., USB PD 3.0 extended power range) with 2V safety margin.

SX9328ICSTRT Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Sensor Type:: SAR Controller

Output Type:: I2C

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

SX9328ICSTRT FAQ

1.How can I place an order for SX9328ICSTRT through Aetrix?

Please submit a Request for Quotation (RFQ) for SX9328ICSTRT 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 SX9328ICSTRT reliable?

The price and inventory of SX9328ICSTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SX9328ICSTRT is usually 5 days.

3.What payment methods are accepted for SX9328ICSTRT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SX9328ICSTRT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SX9328ICSTRT?

SX9328ICSTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SX9328ICSTRT 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 SX9328ICSTRT?

For technical support, including SX9328ICSTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SX9328ICSTRT requirements.

6.How does Aetrix verify that SX9328ICSTRT is sourced from the original manufacturer or authorized distributors?

All SX9328ICSTRT 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 SX9328ICSTRT meets industry standards.

7.What is the process for return or replacement of SX9328ICSTRT?

All SX9328ICSTRT units undergo pre-shipment inspection (PSI). If there is an issue with SX9328ICSTRT, 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 SX9328ICSTRT part is unused and in its original packaging.

Return procedure for SX9328ICSTRT:

1.Submit a request within 90 days.

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

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