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Texas Instruments SN75240PW
- Part No.:
- SN75240PW
- Manufacturer:
- Texas Instruments
- Category:
- Mixed Technology
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN75240PW.pdf
- Description:
- TVS DEVICE MIXED 7V 8-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:249
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Product details
Overview
SN75240PW 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 SN75240PW datasheet, SN75240PW pinout, SN75240PW application, or SN75240PW equivalent, this page delivers verified electrical parameters, package-specific pin mapping, USB port-level protection context, and validated alternative options for robust I/O hardening in embedded and peripheral designs.
Technical Context
The SN75240PW integrates four independent unidirectional TVS diodes in a single TSSOP-8 package, each configured with Zener-triggered transistor clamping for positive transients and forward-biased diode conduction for negative transients. Its 6.5-V breakdown threshold aligns with 3-V/5-V USB transceiver rail margins.
It operates without external bias-functioning purely as a passive voltage-clamping device-and relies on low-inductance ground connections via four dedicated GND pins to shunt transient energy directly to local circuit ground during ESD events exceeding 6.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 6.5 V min - Ensures clamping activates above USB 5-V supply but below transceiver absolute max rating. |
| Input Capacitance | 35 pF typical - Compatible with USB full-speed (12 Mbps) but not high-speed (480 Mbps) due to signal integrity impact. |
| Leakage Current | ≤1 µA at 6 V - Minimizes standby power loss and avoids loading USB data lines during normal operation. |
| ESD Rating (HBM) | ±15 kV - Exceeds IEC 61000-4-2 Level 4 requirements for system-level USB port immunity. |
| Ambient Temp Range | 0°C to 70°C - Validated for commercial-grade USB host/peripheral applications, not extended industrial or automotive. |
| Peak Power Dissipation | 60 W - Sustains short-duration ESD pulses without thermal failure when properly mounted to ground plane. |
Pinout & Package
TSSOP-8 (PW) package: 3.00 mm × 4.40 mm body, 1.2 mm max height, 0.65 mm lead pitch, exposed pad optional per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Analog input | Transient suppressor input for USB D+ line (Line 1). |
| B | Analog input | Transient suppressor input for USB D− line (Line 2). |
| C | Analog input | Transient suppressor input for third signal line (Line 3). |
| D | Analog input | Transient suppressor input for fourth signal line (Line 4). |
| GND (Pins 1, 3, 5, 7) | Power | Four dedicated ground terminals - must all connect to solid ground plane to minimize inductance and ensure effective ESD shunting. |
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. |
| Zener + transistor clamping architecture | Enables sharp turn-on at 6.5 V with low dynamic impedance during ESD events, improving clamping consistency vs. standard diodes. |
| Low 35-pF input capacitance | Maintains USB full-speed signal integrity (12 Mbps) while avoiding timing skew or rise/fall degradation on differential pairs. |
| Four-GND-pin configuration | Reduces ground path inductance by >50% vs. single-GND packages - critical for sub-nanosecond ESD pulse dissipation. |
Applications
| USB Full-Speed Host Port | USB Full-Speed Peripheral |
|---|---|
Use Scenario: Protecting motherboard USB controller ports from repeated hot-plug ESD events during field deployment. IC Role / Device Role / Timing Role: Passive clamping element placed between USB connector and transceiver IC, activated only during transients ≥6.5 V. Use Value: Extends system-level ESD immunity from baseline 2–4 kV HBM to 15 kV HBM without altering USB signal timing or adding active components. | Use Scenario: Hardening external USB devices (keyboards, mice, storage) against user-handling ESD in office environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on D+/D− lines, operating independently of host-side protection. Use Value: Enables pass/fail compliance with IEC 61000-4-2 Level 4 without redesigning PCB layout or increasing bill-of-materials complexity. |
| USB Low-Speed Hub Port | Industrial USB Data Logger Interface |
Use Scenario: Securing downstream hub ports connecting multiple peripherals where cumulative ESD exposure increases failure risk. IC Role / Device Role / Timing Role: Quadruple TVS providing parallel protection for D+, D−, VBUS sense, and ground-referenced control line. Use Value: Leverages unused C/D pins to protect auxiliary signals - eliminates need for discrete TVS arrays and saves board space. | Use Scenario: Adding robustness to USB-connected environmental sensors deployed in factory-floor settings with elevated static charge risk. IC Role / Device Role / Timing Role: Primary ESD barrier at connector entry point, interfacing directly with microcontroller USB PHY. Use Value: Maintains 0–70°C operational range compatibility with industrial enclosure thermal profiles while delivering certified 15-kV HBM protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65240PW | Same TSSOP-8 package, identical pinout, but rated for –40°C to 85°C operating range. | Supports wider ambient temperature range - suitable for industrial or outdoor USB deployments. | Select SN65240PW when extended temperature operation is required; SN75240PW remains optimal for cost-sensitive commercial applications. |
| TPD2E001DRSR | 2-channel, 0.65-mm pitch DSBGA-6, 12-pF capacitance, ±8-kV HBM, 3.3-V compatible. | Lower capacitance enables marginal high-speed USB support; smaller footprint but fewer protected lines. | Choose TPD2E001DRSR for space-constrained designs needing dual-line protection with tighter signal integrity budgets. |
Compared with SN65240PW, SN75240PW trades extended temperature range for lower cost and commercial qualification; versus TPD2E001DRSR, it offers double the channel count and higher ESD rating at the expense of higher capacitance and larger TSSOP footprint - making it ideal for legacy full-speed USB port hardening where channel density and ruggedness outweigh miniaturization needs.
Availability
SN75240PW is available at Aetrix Electronics and suitable for USB full-speed host ports, USB peripheral interfaces, and industrial data logger connectivity requiring stable component supply and long-term obsolescence management.
Supply support for SN75240PW 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 specializing in analog and embedded processing technologies, with leadership in interface, protection, and signal chain solutions.
The SNx52x0 family-including SN75240PW-is engineered specifically for USB port-level transient suppression, targeting cost-effective, high-reliability ESD hardening in commercial-grade computing and peripheral applications.
FAQ
What is the operating temperature range for SN75240PW?
The SN75240PW is specified for 0°C to 70°C ambient operation. This commercial-grade range matches typical desktop, peripheral, and office-environment USB applications. It is not qualified for industrial (–40°C to 85°C) or automotive use - for those, SN65240PW or SN65220DBVR are recommended alternatives. The SN75240PW datasheet explicitly defines TA = 0°C to 70°C in Section 7.3.
Can SN75240PW be used for USB 2.0 high-speed (480 Mbps) applications?
No, SN75240PW is unsuitable for USB 2.0 high-speed operation. Its 35-pF typical input capacitance introduces excessive signal distortion and timing skew at 480 Mbps. The datasheet explicitly states in Section 3 that "The input capacitance of 35 pF makes it unsuitable for high-speed USB 2.0 applications." It is validated only for full-speed (12 Mbps) and low-speed (1.5 Mbps) USB 1.1 compliance.
How many ground connections does SN75240PW require, and why?
SN75240PW requires connection of all four GND pins (pins 1, 3, 5, and 7) to a solid ground plane. This is mandated in Section 12.1 Layout Guidelines to minimize parasitic inductance in the ESD current path. Using fewer than four grounds degrades clamping speed and reduces effective ESD immunity - the four-pin design lowers total ground path inductance by distributing surge current across parallel low-inductance routes.
What is the standoff voltage specification for SN75240PW?
The SN75240PW has a minimum standoff voltage of 6 V, defined as the maximum continuous working voltage before clamping initiates. This value ensures reliable operation under nominal 5-V USB bus conditions while maintaining margin below the 6.5-V minimum breakdown voltage. The 6-V standoff is confirmed in Section 1 Features and Table 7-5 Electrical Characteristics (V(BR) = 6.5 V min at 1 mA).
Is SN75240PW pin-compatible with SN65240PW?
Yes, SN75240PW and SN65240PW share identical TSSOP-8 (PW) packaging, pinout, and terminal functions - including A, B, C, D inputs and GND pins at positions 1, 3, 5, and 7. They differ only in temperature rating (SN75240PW: 0°C–70°C; SN65240PW: –40°C–85°C) and part marking (A75240 vs. A65240). This allows direct substitution in commercial applications where extended temperature range is not required.
SN75240PW 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
SN75240PW FAQ
1.How can I place an order for SN75240PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75240PW 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 SN75240PW reliable?
The price and inventory of SN75240PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75240PW is usually 5 days.
3.What payment methods are accepted for SN75240PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75240PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75240PW?
SN75240PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75240PW 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 SN75240PW?
For technical support, including SN75240PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75240PW requirements.
6.How does Aetrix verify that SN75240PW is sourced from the original manufacturer or authorized distributors?
All SN75240PW 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 SN75240PW meets industry standards.
7.What is the process for return or replacement of SN75240PW?
All SN75240PW units undergo pre-shipment inspection (PSI). If there is an issue with SN75240PW, 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 SN75240PW part is unused and in its original packaging.
Return procedure for SN75240PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN75240PW Tags
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