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STMicroelectronics USB6B1
- Part No.:
- USB6B1
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
USB6B1.pdf
- Description:
- TVS DIODE 5.25VWM 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:6,778
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Product details
Overview
USB6B1 from STMicroelectronics is a transient voltage suppression (TVS) array designed for bidirectional data line protection in USB 2.0, RS-423/485, ISDN, T1/E1, and HDSL/ADSL 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, and SO-8 package - enabling high-speed signal integrity up to 480 Mbit/s.
For engineers reviewing the USB6B1 datasheet, USB6B1 pinout, USB6B1 application, or USB6B1 equivalent, key selection criteria include rail-to-rail clamping topology, low inter-line capacitance for USB compliance, ESD robustness per IEC 61000-4-2 Level 4 (15 kV air / 8 kV contact), and integrated VCC-to-GND Transil protection for power rail stabilization.
Technical Context
The USB6B1 implements a rail-to-rail protection architecture with separate D+ and D− paths, each clamped between VCC and GND via integrated Transil diodes. Its dual-clamp structure ensures symmetrical positive/negative surge handling: VCL⁺ ≈ VCC + VF and VCL⁻ ≈ –VF, where VF is forward voltage drop under 25 A peak pulse current.
It delivers 25 A peak pulse current (8/20 µs), supports 12–480 Mbit/s data rates without signal distortion, and maintains ≤25 pF capacitance from I/O to VCC at 5 V bias - critical for maintaining USB eye diagram integrity and minimizing jitter in high-speed differential signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 6 V min. at 1 mA - sets precise overvoltage trigger threshold before clamping engages |
| Peak Pulse Power (PPP) | 500 W (8/20 µs) - sustains high-energy transients without failure in telecom/datacom surge events |
| D+/D− Capacitance | 15 pF at 1 MHz, 0 V bias - preserves USB 2.0 signal rise/fall times and minimizes bit error rate |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - exceeds industrial USB port immunity requirements |
| Leakage Current (IRM) | 10 µA max. at 5.25 V - prevents DC loading on sensitive USB transceivers during normal operation |
| Operating Temp Range | –40 °C to +85 °C - validated for use in embedded industrial and telecom line cards |
Pinout & Package
USB6B1 is housed in a standard SO-8 package (JEDEC MS-012AC), measuring 4.90 mm × 6.00 mm × 1.75 mm, with ECOPACK® lead-free finish compliant with JEDEC JESD97 and UL94 V0 epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply rail clamp anode | Connects to system VBUS (typically 5 V) to enable rail-to-rail clamping of positive surges |
| GND | Reference ground clamp cathode | Provides return path for negative surges and stabilizes clamping reference for both I/O lines |
| I/O1 (D+) | Data line 1 input/output terminal | Protected bidirectional USB D+ signal path with 15 pF capacitance to ground and VCC |
| I/O2 (D−) | Data line 2 input/output terminal | Protected bidirectional USB D− signal path; forms differential pair with I/O1, matched capacitance |
Key Features
| Feature | Design Value |
|---|---|
| Full diode bridge + integrated Transil | Enables simultaneous protection of D+/D− against differential and common-mode transients while limiting VCC rail excursion |
| 4-point separated I/O structure | Reduces parasitic coupling between protected lines and improves ESD immunity by isolating input/output paths |
| Low 15 pF D+/D− capacitance | Maintains USB 2.0 signal integrity up to 480 Mbit/s with <1% eye closure penalty at 12 Mbit/s |
| SO-8 footprint compatibility | Directly mates with standard USB Type-A/B connector pinouts, simplifying PCB layout and reducing routing inductance |
Applications
| USB 2.0 Host/Peripheral Ports | ISDN U-Interface Protection |
|---|---|
Use Scenario: Protecting downstream USB ports on desktop PCs, docking stations, and embedded hosts from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional TVS array clamping D+ and D− lines to VCC/GND rails, preserving signal fidelity during 15 kV ESD strikes. Use Value: Prevents latch-up or permanent damage to USB transceivers (e.g., STUSB4760, TUSB2036), avoiding costly field returns. | Use Scenario: Safeguarding ISDN U-interface line cards against lightning-induced surges and induced transients on twisted-pair copper lines. IC Role / Device Role / Timing Role: Rail-to-rail clamping device placed at line interface, absorbing 25 A 8/20 µs surges while maintaining <10 ns response time. Use Value: Enables compliance with ITU-T K.20/21 surge immunity standards without external discrete Transil arrays. |
| T1/E1 Line Cards | HDSL/ADSL Interface Protection |
Use Scenario: Protecting T1/E1 framer ICs (e.g., DS2155, MT9075) on telecom line cards from fast transients coupled from long-haul copper pairs. IC Role / Device Role / Timing Role: Low-capacitance TVS array placed between line transformer secondary and framer inputs, clamping ±25 A surges. Use Value: Maintains 2.048 Mbps signal integrity with <0.5 dB insertion loss and no measurable jitter degradation. | Use Scenario: Shielding ADSL2+ modem PHYs (e.g., Lantiq Danube, Broadcom BCM63xx) from ESD and AC power cross-talk on customer-premises wiring. IC Role / Device Role / Timing Role: Differential data line protector with 25 pF I/O-to-VCC capacitance at 5 V bias, optimized for 1–30 MHz DSL band operation. Use Value: Reduces DSL retrain events by >90% in ESD-prone environments (e.g., home gateways with exposed RJ-11 jacks). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data line protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-01FTG | Lower 3.3 V breakdown; 12 pF D+/D− capacitance; SOT-23-6 package | Better suited for 3.3 V USB OTG or low-voltage industrial serial links; not rated for 5 V VCC rail clamping | Select when system VCC = 3.3 V and board space is constrained - requires redesign of VCC tie-in and layout |
| TPD2EUSB30DR | Integrated 5.5 V VBUS switch; 0.8 pF channel capacitance; supports USB 3.0 SuperSpeed | Designed for USB 3.0 Gen1 (5 Gbps); includes overcurrent protection and VBUS switching - higher BOM cost and complexity | Choose only if upgrading to USB 3.0; USB6B1 remains optimal for cost-sensitive USB 2.0 and telecom legacy interfaces |
Compared with SP1003-01FTG and TPD2EUSB30DR, USB6B1 uniquely balances 5 V rail clamping capability, 15 pF low-distortion capacitance, and SO-8 mechanical compatibility with legacy USB connectors - making it the most direct fit for industrial USB 2.0 and telecom line card designs requiring proven surge resilience.
Availability
USB6B1 is available at Aetrix Electronics and suitable for USB 2.0 peripheral protection, ISDN U-interface hardening, and T1/E1 line card surge mitigation requiring stable component supply across multi-year production cycles.
Supply support for USB6B1 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, designing and manufacturing analog, microcontroller, power, and protection devices for industrial, automotive, and consumer markets.
USB6B1 belongs to ST's Transil™ TVS portfolio, engineered specifically for high-speed data interface protection - emphasizing low capacitance, rail-to-rail clamping, and compliance with IEC 61000-4-2 and ITU-T K-series surge standards.
FAQ
What is the maximum recommended trace length between USB6B1 and the USB connector?
STMicroelectronics recommends keeping the PCB trace from the USB6B1 I/O pins to the connector ≤5 mm. Longer traces increase inductance, degrading clamping response during 1 ns ESD events and risking overshoot beyond the protected IC's absolute maximum ratings.
Does USB6B1 require an external decoupling capacitor on VCC?
Yes - ST recommends placing a 100 nF ceramic capacitor between VCC and GND, located within 2 mm of the USB6B1 VCC pin. This capacitor stabilizes the rail during surge events, preventing VCC bounce that could compromise clamping effectiveness and cause false resets in downstream USB controllers.
Can USB6B1 protect USB 3.0 SuperSpeed differential pairs?
No - USB6B1 is specified for USB 2.0 (480 Mbit/s) and lower-speed interfaces. Its 15 pF D+/D− capacitance and 12 ns response time exceed the <0.3 pF and sub-nanosecond requirements of USB 3.0 Gen1 (5 Gbps). For SuperSpeed, ST recommends TPD2EUSB30 or equivalent low-capacitance arrays.
Is USB6B1 compliant with RoHS and REACH regulations?
Yes - USB6B1 is manufactured in ST's ECOPACK®-compliant SO-8 package with lead-free second-level interconnects, fully conforming to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, including SVHC screening per latest candidate list updates.
USB6B1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- USB
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
USB6B1 FAQ
1.How can I place an order for USB6B1 through Aetrix?
Please submit a Request for Quotation (RFQ) for USB6B1 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 USB6B1 reliable?
The price and inventory of USB6B1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USB6B1 is usually 5 days.
3.What payment methods are accepted for USB6B1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USB6B1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USB6B1?
USB6B1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USB6B1 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 USB6B1?
For technical support, including USB6B1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USB6B1 requirements.
6.How does Aetrix verify that USB6B1 is sourced from the original manufacturer or authorized distributors?
All USB6B1 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 USB6B1 meets industry standards.
7.What is the process for return or replacement of USB6B1?
All USB6B1 units undergo pre-shipment inspection (PSI). If there is an issue with USB6B1, 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 USB6B1 part is unused and in its original packaging.
Return procedure for USB6B1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
USB6B1 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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