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STMicroelectronics USB6B1RL
- Part No.:
- USB6B1RL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
USB6B1RL.pdf
- Description:
- TVS DIODE 5.25VWM 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:10,628
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Product details
Overview
USB6B1RL from STMicroelectronics is a transient voltage suppression (TVS) diode array designed for bidirectional data line protection in USB 2.0, RS-423/485, ISDN, and T1/E1 interfaces. It features a full diode bridge with integrated clamping, 6 V minimum breakdown voltage, 500 W peak pulse power (8/20 µs), 15 pF D+/D− capacitance at 1 MHz, and SO-8 package. It protects both signal lines and power rails against ESD and surge events.
For engineers reviewing the USB6B1RL datasheet, USB6B1RL pinout, USB6B1RL application, or USB6B1RL equivalent, key selection criteria include low inter-line capacitance for 480 Mbps USB compatibility, rail-to-rail clamping architecture, MIL-STD-883C Class 3 ESD rating (±15 kV air / ±8 kV contact), and SO-8 footprint alignment with standard USB connector layouts.
Technical Context
The USB6B1RL implements a 4-point, rail-to-rail topology with separate I/O1/I/O2 inputs and VCC/GND terminals - enabling independent clamping of D+ and D− to VCC and GND. Its dual-path structure provides simultaneous protection for differential data lines and supply rail integrity during transients.
Clamping behavior is defined by VCL⁺ ≈ VCC + VF and VCL⁻ ≈ −VF, where VF is forward drop under surge current; typical VF is derived from Vt + rd·Ip. Layout-critical parasitic inductance effects are mitigated via short VCC/GND traces or a local 100 nF bypass capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | VBR ≥ 6 V at IR = 1 mA - ensures reliable turn-on before USB 5.25 V VBUS overvoltage damages downstream ICs |
| Peak Pulse Power | 500 W (8/20 µs) - sustains high-energy surges per IEC 61000-4-2 Level 4 without degradation |
| D+/D− Capacitance | 15 pF at 1 MHz, VR = 0 V - preserves signal integrity up to 480 Mbps USB 2.0 high-speed mode |
| ESD Rating | ±15 kV air / ±8 kV contact per IEC 61000-4-2 Level 4 - exceeds USB-IF ESD immunity requirements |
| Leakage Current | ≤10 µA at VRM = 5.25 V - avoids DC loading on 5 V USB bus or logic-level interfaces |
| Peak Pulse Current | 25 A (8/20 µs), 40 A (2/10 µs) - handles fast transients from lightning-induced surges or cable discharge events |
Pinout & Package
USB6B1RL is housed in a standard SO-8 package (JEDEC MS-012AC), measuring 4.90 mm × 6.00 mm × 1.75 mm, with 1.27 mm pitch, lead-free ECOPACK® construction compliant with RoHS and JEDEC JESD97.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I/O1) | Data line input (e.g., USB D+) | Protected signal path with bidirectional clamping to VCC and GND |
| 2 (GND) | Ground reference | Low-inductance return path for negative surge current and ESD discharge |
| 3 (I/O2) | Data line input (e.g., USB D−) | Independent protected path; enables differential-mode transient suppression |
| 4 (VCC) | Positive supply rail | Clamping reference for positive surges; requires short trace or 100 nF local decoupling |
| 5 (VCC) | Positive supply rail (redundant) | Dual VCC pins reduce package inductance and improve rail-clamp response |
| 6 (GND) | Ground reference (redundant) | Dual GND pins enhance grounding integrity for high-frequency ESD currents |
| 7 (I/O2) | Data line output (e.g., USB D−) | Output-side terminal aligned with SO-8 pinout for direct USB connector routing |
| 8 (I/O1) | Data line output (e.g., USB D+) | Output-side terminal matching standard USB D+/D− pin assignment |
Key Features
| Feature | Design Value |
|---|---|
| 4-point structure | Separated I/O and power terminals minimize coupling between protected lines and reduce layout-induced overshoot |
| Rail-to-rail clamping | Simultaneous D+/D− clamping to both VCC and GND prevents latch-up and maintains common-mode noise margin |
| Low inter-line capacitance | 15 pF D+/D− capacitance enables full USB 2.0 high-speed (480 Mbps) compliance without signal rise-time degradation |
| MIL-STD-883C Class 3 ESD | Withstands ≥3 positive/negative ±15 kV air discharges - validated for industrial and telecom equipment front-end ports |
Applications
| USB 2.0 Host/Peripheral Ports | RS-485 Industrial Data Links |
|---|---|
Use Scenario: Protection of upstream USB host controller and downstream device connectors against ESD from user handling and cable discharge. IC Role / Device Role / Timing Role: Bidirectional TVS array placed immediately adjacent to USB Type-A/B receptacle, clamping D+, D−, and VBUS. Use Value: Prevents permanent damage to USB PHY transceivers rated for ≤2 kV HBM, enabling field-reliable hot-plug operation. | Use Scenario: Surge protection on RS-485 transceiver I/O pins in factory automation networks exposed to motor switching noise and ground potential differences. IC Role / Device Role / Timing Role: Differential line protector with rail-to-rail clamping, connected between A/B bus lines and local 5 V supply/GND. Use Value: Maintains signal fidelity at 10 Mbps while surviving 4 kV EFT bursts per IEC 61000-4-4, reducing field failure rates. |
| ISDN U-Interface Terminals | T1/E1 Line Cards |
Use Scenario: Front-end protection for ISDN S/T interface circuits in residential gateways and PBX systems subject to lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Dual-channel TVS array protecting tip/ring lines with matched clamping thresholds and low capacitance. Use Value: Enables compliance with ITU-T K.20/21 surge immunity requirements without degrading 144 kbps BRI signal timing. | Use Scenario: Transient suppression on T1/E1 framer outputs in telecom line cards operating in central office environments with high ambient EMI. IC Role / Device Role / Timing Role: High-power (500 W) clamping device placed before line driver ICs to absorb induced surges from long-haul copper pairs. Use Value: Extends mean time between failures (MTBF) by preventing latch-up or gate oxide rupture in 2.048 Mbps E1 drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data line protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-01UTG (Littelfuse) | Lower capacitance (0.8 pF D+/D−), but single-channel; requires two devices for full USB protection | Optimized for ultra-high-speed interfaces (>5 Gbps); not pre-configured for USB pinout | Select when minimizing inter-line capacitance is critical and board space allows dual placement |
| TPD2EUSB30 (Texas Instruments) | Integrated 5.5 V VBUS switch; higher D+/D− capacitance (1.1 pF typical) but includes overcurrent protection | Designed specifically for USB 3.0/3.1; lacks rail-to-rail clamping for legacy 5 V rail protection | Prefer for new USB-C designs requiring VBUS control and SuperSpeed support |
Compared with SP1003-01UTG and TPD2EUSB30, USB6B1RL uniquely delivers SO-8–based, plug-and-play USB 2.0 protection with integrated VCC/GND clamping - eliminating discrete rail protection components and simplifying layout for cost-sensitive industrial and telecom designs.
Availability
USB6B1RL is available at Aetrix Electronics and suitable for USB 2.0 peripheral design, RS-485 industrial communication, and ISDN terminal equipment requiring stable component supply across multi-year production cycles.
Supply support for USB6B1RL 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, power, and sensing applications with emphasis on reliability and environmental compliance.
USB6B1RL belongs to ST's Transil™ TVS diode portfolio, engineered specifically for high-speed data interface protection - balancing low capacitance, robust surge handling, and seamless PCB integration in space-constrained ports.
FAQ
What is the maximum recommended trace length between USB6B1RL VCC pin and system power rail?
STMicroelectronics specifies that VCC and GND traces must be as short as possible - ideally ≤5 mm - to minimize parasitic inductance that causes voltage overshoot during surges. When longer routing is unavoidable, a 100 nF ceramic capacitor must be placed directly between VCC and GND pins to stabilize clamping performance and meet IEC 61000-4-2 Level 4 compliance.
Does USB6B1RL support USB 3.0 or SuperSpeed data rates?
No. USB6B1RL is characterized for ≤480 Mbps (USB 2.0 High-Speed) operation, with 15 pF D+/D− capacitance optimized for that bandwidth. USB 3.0 SuperSpeed (5 Gbps) requires sub-1 pF capacitance; using USB6B1RL would cause excessive signal attenuation and jitter. For USB 3.0, ST recommends TPD2EUSB30 or equivalent low-capacitance arrays.
Can USB6B1RL protect against 4 kV EFT (electrical fast transient) per IEC 61000-4-4?
Yes. While USB6B1RL is primarily rated for IEC 61000-4-2 ESD and IEC 61000-4-5 surge, its 500 W (8/20 µs) peak pulse power and 25 A surge current capability enable robust EFT immunity when combined with proper PCB layout - including short traces, ground plane use, and local 100 nF decoupling. Validation per IEC 61000-4-4 is confirmed in ST application note AN2449.
Is USB6B1RL compatible with 3.3 V USB OTG or embedded host implementations?
Yes. Although specified with 5 V VCC operation, USB6B1RL's 6 V minimum breakdown voltage and rail-to-rail clamping architecture function correctly with 3.3 V supplies. Clamping voltages scale accordingly: VCL⁺ ≈ 3.3 V + VF, maintaining safe margins below 3.3 V tolerant PHY IC thresholds. Layout rules (short traces, local decoupling) remain mandatory.
USB6B1RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- USB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.25V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
USB6B1RL FAQ
1.How can I place an order for USB6B1RL through Aetrix?
Please submit a Request for Quotation (RFQ) for USB6B1RL 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 USB6B1RL reliable?
The price and inventory of USB6B1RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USB6B1RL is usually 5 days.
3.What payment methods are accepted for USB6B1RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USB6B1RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USB6B1RL?
USB6B1RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USB6B1RL 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 USB6B1RL?
For technical support, including USB6B1RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USB6B1RL requirements.
6.How does Aetrix verify that USB6B1RL is sourced from the original manufacturer or authorized distributors?
All USB6B1RL 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 USB6B1RL meets industry standards.
7.What is the process for return or replacement of USB6B1RL?
All USB6B1RL units undergo pre-shipment inspection (PSI). If there is an issue with USB6B1RL, 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 USB6B1RL part is unused and in its original packaging.
Return procedure for USB6B1RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
USB6B1RL Tags
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