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Texas Instruments SN75240PWG4
- Part No.:
- SN75240PWG4
- Manufacturer:
- Texas Instruments
- Category:
- Mixed Technology
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN75240PWG4.pdf
- Description:
- TVS DEVICE MIXED 7V 8-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,401
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Product details
Overview
SN75240PWG4 from Texas Instruments is a quadruple unidirectional transient voltage suppressor (TVS) designed for ESD protection of USB full-speed and low-speed ports. It features 6.5-V minimum breakdown voltage, 35-pF typical input capacitance, ≤1-µA leakage at 6 V, 15-kV HBM ESD rating, and operates across 0°C to 70°C ambient temperature.
For engineers reviewing the SN75240PWG4 datasheet, SN75240PWG4 pinout, SN75240PWG4 application, or SN75240PWG4 equivalent, this device serves as a discrete TVS solution for robust, low-capacitance I/O line protection in legacy USB 1.1 systems - with critical attention to standoff voltage margin, ground layout integrity, and thermal derating in PDIP-8 packages.
Technical Context
The SN75240PWG4 integrates four independent unidirectional p-n junction TVS diodes in a single PDIP-8 package. Each channel clamps transients above 6.5 V while maintaining ≤1 µA leakage at 6 V, enabling compatibility with 3-V/5-V USB transceivers without signal integrity degradation.
Its functional mode switches from high-impedance standby (below breakdown) to low-impedance conduction (above breakdown), shunting ESD energy directly to local GND. The device requires no external power supply and relies on physical layout - especially multi-pin ground connections and minimal trace inductance - to achieve rated 15-kV HBM performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 6.5 V min - ensures clamping occurs above USB 5-V VBUS and transceiver supply rails without false triggering |
| Input Capacitance | 35 pF typical - compatible with USB full-speed (12 Mbps) but unsuitable for USB 2.0 high-speed (480 Mbps) |
| Leakage Current | ≤1 µA at 6 V - prevents loading of USB data lines during normal operation |
| ESD Rating (HBM) | ±15 kV - exceeds IEC 61000-4-2 system-level requirements for consumer USB ports |
| Ambient Temperature Range | 0°C to 70°C - qualified for commercial-grade USB host/peripheral applications, not industrial or automotive |
| Package Type | PDIP-8 - through-hole mounting with 9.09 mm × 6.35 mm footprint and 4 dedicated GND pins for low-inductance grounding |
Pinout & Package
SN75240PWG4 is housed in an 8-pin plastic dual in-line package (PDIP-8) with 9.09 mm × 6.35 mm body size and 2.54 mm lead pitch. Four pins are assigned to GND to minimize ground path inductance during ESD events.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Primary local ground connection for channel A suppression path |
| 2 | A | Transient suppressor input for USB D+ line |
| 3 | GND | Secondary local ground connection for channel A and shared return |
| 4 | B | Transient suppressor input for USB D− line |
| 5 | GND | Tertiary local ground connection supporting channel B conduction |
| 6 | C | Transient suppressor input for third I/O line (unused in standard USB, available for custom use) |
| 7 | GND | Quaternary ground pin - mandatory connection to solid ground plane for optimal ESD response |
| 8 | D | Transient suppressor input for fourth I/O line (e.g., VBUS sense or auxiliary signal) |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple unidirectional TVS structure | Four independent clamping paths enable simultaneous protection of D+, D−, and two auxiliary lines without cross-talk |
| Multi-GND pin architecture | Four dedicated GND pins reduce total ground loop inductance, critical for sub-10-ns ESD pulse dissipation |
| Low 35-pF input capacitance | Preserves USB full-speed signal rise/fall times and eye diagram integrity without requiring equalization |
| 15-kV human body model rating | Validated at system level per IEC 61000-4-2 - achievable only with proper PCB layout including ground vias and connector proximity |
| No external bias required | Passive p-n junction operation eliminates need for supply rails, sequencing, or enable logic in USB port designs |
Applications
| USB Full-Speed Host Port | USB Low-Speed Peripheral |
|---|---|
Use Scenario: Desktop PC motherboard USB-A ports exposed to frequent hot-plug and user-handling ESD events. IC Role / Device Role / Timing Role: Standby-mode TVS diode array that activates only during >6.5-V transients on D+/D− lines. Use Value: Prevents latch-up or gate oxide damage in USB transceivers by diverting 15-kV HBM strikes to local ground before reaching silicon. |
Use Scenario: Keyboard/mouse microcontroller with integrated USB 1.1 PHY connected via short internal cables. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between connector and PHY differential inputs. Use Value: Enables reliable operation in uncontrolled environments (e.g., office, home) where 2–4 kV ESD is common but board space limits discrete diode count. |
| Industrial USB Hub Controller | Embedded USB Device Interface |
Use Scenario: Factory-floor USB hub aggregating sensors with intermittent cable disconnection and static buildup. IC Role / Device Role / Timing Role: Front-end transient suppressor on upstream and downstream D+/D− pairs. Use Value: Maintains data link integrity across 12-Mbps full-speed links without adding jitter or insertion loss due to low 35-pF capacitance. |
Use Scenario: Medical diagnostic device with USB interface for firmware updates and log export. IC Role / Device Role / Timing Role: Fail-safe ESD barrier between external connector and isolated USB PHY. Use Value: Meets IEC 60601-1-2 ESD immunity requirements when combined with proper ground stitching and enclosure bonding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65240P | Identical pinout and electrical specs; rated for –40°C to 85°C operating range vs. SN75240PWG4's 0°C to 70°C | Supports extended temperature environments such as industrial enclosures or unventilated kiosks | Select SN65240P when ambient operating temperature may fall below 0°C or exceed 70°C |
| TPD2E001DRSR | 2-channel, 1.5-pF capacitance, SOT-5X3 package; lower clamping voltage (5.5 V) and 8-kV HBM rating | Targeted at space-constrained portable USB ports where ultra-low capacitance is prioritized over maximum ESD robustness | Choose TPD2E001DRSR only for compact, battery-powered devices with <8-kV ESD exposure risk and strict signal integrity needs |
Compared with SN65240P and TPD2E001DRSR, SN75240PWG4 provides the highest HBM rating (15 kV) in a through-hole PDIP package ideal for prototyping and commercial-grade USB ports where thermal mass and mechanical stability outweigh miniaturization needs.
Availability
SN75240PWG4 is available at Aetrix Electronics and suitable for USB full-speed host ports, low-speed peripherals, and industrial hub controllers requiring stable component supply and long-term commercial-grade availability.
Supply support for SN75240PWG4 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, and personal electronics markets.
SN75240PWG4 belongs to TI's USB port transient suppressor family, engineered specifically to protect legacy USB 1.1 transceivers from ESD and electrical noise in cost-sensitive commercial applications.
FAQ
What is the maximum data rate supported by SN75240PWG4?
The SN75240PWG4 supports USB full-speed operation up to 12 Mbps. Its 35-pF typical input capacitance introduces negligible signal distortion at this rate but makes it unsuitable for USB 2.0 high-speed (480 Mbps) applications where capacitance must remain below 1–2 pF. Always verify eye diagram compliance in final layout.
Does SN75240PWG4 require a power supply to operate?
No, SN75240PWG4 is a passive device composed of integrated p-n junction diodes and requires no external power supply or biasing. It functions solely through avalanche and forward conduction triggered by transient overvoltage events on its input terminals relative to GND.
Can SN75240PWG4 be used for USB 2.0 high-speed protection?
No, SN75240PWG4 is not suitable for USB 2.0 high-speed (480 Mbps) applications. Its 35-pF input capacitance degrades signal integrity beyond acceptable limits for high-speed differential signaling. TI explicitly states in the datasheet that this device is intended only for USB low- and full-speed ports.
How many ground connections does SN75240PWG4 require on the PCB?
SN75240PWG4 has four dedicated GND pins (pins 1, 3, 5, and 7) and requires all four to be connected directly to a solid ground plane using multiple vias. Omitting any GND connection degrades ESD clamping speed and increases transient voltage overshoot at the protected IC.
What is the standoff voltage specification for SN75240PWG4?
The SN75240PWG4 has a minimum standoff voltage of 6 V, defined as the maximum continuous working voltage it can tolerate without significant leakage. This ensures safe operation across USB 5-V nominal rails with margin against ripple and tolerance variations while remaining below the 6.5-V minimum breakdown threshold.
SN75240PWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Voltage - Clamping:
- 7V
- Technology:
- Mixed Technology
- Number of Circuits:
- 1
- Applications:
- USB
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
SN75240PWG4 FAQ
1.How can I place an order for SN75240PWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75240PWG4 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 SN75240PWG4 reliable?
The price and inventory of SN75240PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75240PWG4 is usually 5 days.
3.What payment methods are accepted for SN75240PWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75240PWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75240PWG4?
SN75240PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75240PWG4 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 SN75240PWG4?
For technical support, including SN75240PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75240PWG4 requirements.
6.How does Aetrix verify that SN75240PWG4 is sourced from the original manufacturer or authorized distributors?
All SN75240PWG4 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 SN75240PWG4 meets industry standards.
7.What is the process for return or replacement of SN75240PWG4?
All SN75240PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN75240PWG4, 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 SN75240PWG4 part is unused and in its original packaging.
Return procedure for SN75240PWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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