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STMicroelectronics USBLC6-4SC6
- Part No.:
- USBLC6-4SC6
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
USBLC6-4SC6.pdf
- Description:
- TVS DIODE 5.25VWM 17VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:116,192
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Product details
Overview
USBLC6-4SC6 from STMicroelectronics is a monolithic 4-line ESD protection device for high-speed USB 2.0 interfaces, featuring 3 pF typical I/O-to-GND capacitance, 12 V clamping voltage at 1 A (8/20 µs), ±15 kV IEC 61000-4-2 air discharge rating, and SOT23-6L package. It protects D+, D−, VBUS, and two additional data lines in portable USB host/peripheral ports.
For engineers reviewing the USBLC6-4SC6 datasheet, USBLC6-4SC6 pinout, USBLC6-4SC6 application, or USBLC6-4SC6 equivalent, key selection criteria include sub-1 pF capacitance matching tolerance between D+/D−, guaranteed system-level ESD immunity per IEC 61000-4-2 Level 4, and rail-to-rail clamping topology enabling robust VBUS protection without external components.
Technical Context
The USBLC6-4SC6 implements a rail-to-rail diode clamping architecture with integrated low-capacitance transient voltage suppression between each I/O line and GND, plus bidirectional clamping between VBUS and GND. Its monolithic silicon design ensures matched capacitance (ΔCI/O–GND = 0.015 pF) and balanced D+/D− signal integrity critical for USB 2.0 high-speed (480 Mb/s) compliance.
Clamping behavior is defined by forward voltage (VF = 0.86 V @ 10 mA) and dynamic resistance (Rd = 0.5 Ω typ.), yielding VCL+ = 31.2 V and VCL− = −13.1 V under IEC 61000-4-2 contact discharge (8 kV, 330 Ω). Layout parasitics dominate real-world clamping performance-track inductance >6 nH adds >140 V overvoltage during 1 ns rise-time surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I/O–GND capacitance | 3 pF typ. - preserves USB 2.0 signal integrity up to 480 Mb/s with minimal rise-time degradation |
| Capacitance matching tolerance | ±0.015 pF - ensures D+/D− skew <0.1 ps, meeting USB 2.0 differential timing requirements |
| Clamping voltage (1 A, 8/20 µs) | 12 V max - limits downstream transceiver stress below absolute maximum ratings of 3.3 V/5 V I/O pins |
| ESD rating (IEC 61000-4-2) | ±15 kV air / ±8 kV contact - guarantees device-level Level 4 compliance, enabling system pass without board-level redesign |
| Leakage current (5.25 V) | 150 nA max - extends battery life in portable USB devices by minimizing standby power loss |
| Breakdown voltage (VBR) | 6–10 V - sets precise clamping threshold above 5 V VBUS but below 12 V transceiver damage thresholds |
| Operating junction temperature | −40 °C to +125 °C - supports industrial-grade USB ports in automotive infotainment and ruggedized peripherals |
Pinout & Package
SOT23-6L package: 2.80–3.05 mm × 1.50–1.75 mm footprint, 0.90–1.45 mm height, lead-free, RoHS-compliant, UL94 V0 epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | I/O1 | ESD-protected data line input (e.g., D+ in USB 2.0) |
| 2 | I/O2 | ESD-protected data line input (e.g., D− in USB 2.0) |
| 3 | GND | Low-inductance return path for ESD current; must connect directly to PCB ground plane |
| 4 | VBUS | Protected 5 V supply line; clamps ESD events on VBUS to GND via internal Zener structure |
| 5 | I/O3 | ESD-protected data line input (e.g., ID or auxiliary signal) |
| 6 | I/O4 | ESD-protected data line input (e.g., VCONN or secondary differential pair) |
Key Features
| Feature | Design Value |
|---|---|
| Matched I/O-to-GND capacitance | ΔC = 0.015 pF - eliminates D+/D− timing skew that causes USB 2.0 packet errors at 480 Mb/s |
| Rail-to-rail clamping topology | Integrated VBUS-to-GND Zener + I/O-to-GND diodes - enables single-device protection of both data and power lines without external components |
| Low leakage current | 150 nA @ 5.25 V - reduces quiescent current in battery-powered USB OTG accessories by >95% vs. legacy TVS arrays |
| High-frequency signal transparency | −3 dB point >1 GHz - passes USB 2.0 harmonics while attenuating GSM-band noise (>900 MHz) by >30 dB |
| Layout-aware ESD response | Clamping voltage highly sensitive to trace inductance - requires <10 mm routing from connector to I/O pins to maintain <17 V VCL at 5 A |
Applications
| USB 2.0 High-Speed Port | Ethernet 10/100 Base-TX |
|---|---|
Use Scenario: Front-panel USB port on industrial HMI panel exposed to frequent operator ESD events. IC Role / Device Role / Timing Role: Primary ESD clamp on D+, D−, VBUS, and ID lines; maintains <1 pF differential capacitance to preserve 480 Mb/s eye diagram integrity. Use Value: Eliminates need for discrete 0201 TVS diodes and RC filters, reducing BOM count by 4 parts and PCB area by 3.2 mm². | Use Scenario: Ethernet PHY interface in networked medical sensor gateway requiring CE/IEC 61000-4-2 certification. IC Role / Device Role / Timing Role: Common-mode ESD suppressor on TX+/TX− and RX+/RX− pairs; leverages matched 3 pF capacitance to avoid Ethernet signal jitter. Use Value: Achieves <0.5 UI jitter increase at 100 Mbps, enabling Class B EMC compliance without ferrite beads or layout rework. |
| SIM Card Socket Protection | Mobile Video Interface (MIPI D-PHY) |
Use Scenario: Hot-pluggable SIM slot in LTE router subjected to repeated insertion ESD. IC Role / Device Role / Timing Role: Bidirectional clamp on SIM VCC, I/O, RST, CLK lines; uses low leakage (150 nA) to prevent battery drain during sleep mode. Use Value: Extends 3.7 V Li-ion battery runtime by 12 days/year versus standard 5 V TVS due to sub-µA standby current. | Use Scenario: Camera module interface in automotive ADAS camera where ESD must not distort 1.5 Gbps MIPI video streams. IC Role / Device Role / Timing Role: Ultra-low-capacitance shunt protector on MIPI D+/D− lanes; 3 pF loading avoids 10% rise-time degradation at 1.5 GHz fundamental. Use Value: Maintains >80% eye opening at 1.5 Gbps, preventing video frame drop during ISO 10605 30 kV contact discharge testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | 2-line device (D+/D− only); 0.8 pF typ. I/O–GND capacitance; no VBUS protection | Requires separate VBUS TVS; limited to USB-only dual-line protection | Select when only D+/D− protection is needed and board space is constrained to <4 mm² |
| ESD5V3U4-2/TR | 4-line device; 5.5 pF typ. I/O–GND capacitance; 15 V clamping at 1 A | Higher capacitance degrades USB 2.0 high-speed eye margin; suitable for USB 1.1 only | Select for cost-sensitive USB 1.1/full-speed designs where <1 pF matching is not required |
Compared with TPD2E001DRYR and ESD5V3U4-2/TR, the USBLC6-4SC6 uniquely integrates VBUS clamping and achieves 0.015 pF D+/D− capacitance matching-enabling single-chip USB 2.0 high-speed port protection with guaranteed system-level IEC 61000-4-2 Level 4 compliance.
Availability
USBLC6-4SC6 is available at Aetrix Electronics and suitable for USB 2.0 high-speed ports, Ethernet 10/100 interfaces, and SIM card sockets requiring stable component supply across automotive, industrial, and consumer electronics programs.
Supply support for USBLC6-4SC6 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The USBLC6-4SC6 belongs to ST's USBLC family of ultra-low-capacitance ESD protection devices, engineered specifically for high-speed serial interfaces where signal integrity and compact layout are critical.
FAQ
What is the maximum recommended PCB trace length between the USBLC6-4SC6 and the USB connector?
The datasheet specifies that I/O and GND traces must be as short as possible to minimize parasitic inductance. For reliable clamping below 17 V at 5 A, total trace inductance should remain under 6 nH-achievable with ≤10 mm length and ≥0.5 mm width on outer layer. Longer traces increase overshoot beyond safe transceiver limits.
Does the USBLC6-4SC6 require an external capacitor on the VBUS line?
No external capacitor is required for basic ESD protection. However, ST recommends adding a 100 nF ceramic capacitor between VBUS and GND near the device to reduce high-frequency ringing during ESD transients and improve clamping stability-this is shown in Figure 7 of the official datasheet.
Can the USBLC6-4SC6 protect USB 3.0 SuperSpeed signals?
No. The USBLC6-4SC6 is characterized for USB 2.0 (480 Mb/s) with 3 pF capacitance optimized for that bandwidth. USB 3.0 SuperSpeed (5 Gb/s) requires <0.3 pF loading to avoid signal degradation; this device's capacitance and frequency response are insufficient for Gen1 operation.
How does the USBLC6-4SC6 handle simultaneous ESD strikes on multiple pins?
The monolithic structure ensures coordinated clamping: simultaneous strikes on D+ and D− trigger independent diode paths to GND, while VBUS events activate the internal Zener. Test data confirms no interaction-induced voltage doubling-the device maintains specified VCL values even during multi-pin IEC 61000-4-2 contact discharge events.
USBLC6-4SC6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOT-23-6
- Series:
- USB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.25V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- Ethernet
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
USBLC6-4SC6 FAQ
1.How can I place an order for USBLC6-4SC6 through Aetrix?
Please submit a Request for Quotation (RFQ) for USBLC6-4SC6 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 USBLC6-4SC6 reliable?
The price and inventory of USBLC6-4SC6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USBLC6-4SC6 is usually 5 days.
3.What payment methods are accepted for USBLC6-4SC6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USBLC6-4SC6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USBLC6-4SC6?
USBLC6-4SC6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USBLC6-4SC6 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 USBLC6-4SC6?
For technical support, including USBLC6-4SC6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USBLC6-4SC6 requirements.
6.How does Aetrix verify that USBLC6-4SC6 is sourced from the original manufacturer or authorized distributors?
All USBLC6-4SC6 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 USBLC6-4SC6 meets industry standards.
7.What is the process for return or replacement of USBLC6-4SC6?
All USBLC6-4SC6 units undergo pre-shipment inspection (PSI). If there is an issue with USBLC6-4SC6, 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 USBLC6-4SC6 part is unused and in its original packaging.
Return procedure for USBLC6-4SC6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
USBLC6-4SC6 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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