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STMicroelectronics ESDALC6-4N4
- Part No.:
- ESDALC6-4N4
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- 4-XFDFN Exposed Pad
- Datasheet:
-
ESDALC6-4N4.pdf
- Description:
- TVS DIODE 3VWM 10VC 4UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,854
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Product details
Overview
ESDALC6-4N4 from STMicroelectronics is a 4-channel unidirectional ESD protection diode array designed for high-speed USB 2.0 data lines (D+, D−, ID, VBUS). It features 6 V stand-off voltage (VRM), 12 pF typical line capacitance per channel, and clamps ±8 kV IEC 61000-4-2 contact discharge to ≤12 V (VCL at 16 A TLP). Used in smartphone USB ports and embedded host interfaces.
For engineers reviewing the ESDALC6-4N4 datasheet, ESDALC6-4N4 pinout, ESDALC6-4N4 application, or ESDALC6-4N4 equivalent, key selection criteria include VRM margin vs. USB 2.0 signaling voltage (3.3 V), low-capacitance preservation of eye diagram integrity, bi-directional surge handling with unidirectional DC biasing, and SOT-23-6L footprint compatibility with space-constrained PCB layouts.
Technical Context
The ESDALC6-4N4 integrates four independent silicon avalanche diodes in a single SOT-23-6L package, each configured as a unidirectional rail-to-rail clamp between I/O and VCC (not ground). Its architecture enables fast response (<1 ns) to IEC 61000-4-2 transients while maintaining low leakage (<100 nA at 6 V) during normal operation.
It supports full-speed USB 2.0 (480 Mbps) by limiting differential capacitance mismatch to <0.5 pF between channels and ensuring symmetrical clamping behavior across D+ and D− paths. VBUS channel is rated for 20 V peak pulse current (IPP = 20 A), while signal lines sustain 12 A (8/20 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM (Stand-off Voltage) | 6 V - ensures no conduction during USB 2.0 nominal 3.3 V signaling, preventing false triggering |
| VCL (Clamping Voltage) | ≤12 V at 16 A TLP - limits transient overvoltage seen by connected PHY to safe level for 1.8 V/3.3 V I/O cells |
| Line Capacitance (CI/O–GND) | 12 pF typical per channel - preserves USB 2.0 eye opening and minimizes signal rise-time degradation |
| IPP (Peak Pulse Current) | 12 A (signal lines), 20 A (VBUS) - withstands repeated IEC 61000-4-2 Level 4 surges without parametric shift |
| Leakage Current (IRM) | <100 nA at 6 V - avoids loading of high-impedance USB pull-up/pull-down resistors |
| Response Time | <1 ns - activates before ESD energy couples into sensitive transceiver circuitry |
Pinout & Package
SOT-23-6L package: 1.45 mm × 2.9 mm footprint, 1.1 mm height, gull-wing leads, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | D+ Anode | Input terminal for USB D+ line; connects to internal avalanche diode anode |
| 2 | GND | Common cathode reference for all four channels; must be low-inductance connection to system ground plane |
| 3 | D− Anode | Input terminal for USB D− line; matched capacitance and VBR to Pin 1 for differential integrity |
| 4 | VBUS Cathode | Output terminal tied to VBUS rail; clamps positive transients to VBUS instead of GND |
| 5 | ID Anode | Input for USB ID pin (micro-B detection); same VRM/VCL specs as signal channels |
| 6 | VCC | Positive supply rail connection; enables rail-to-rail clamping configuration for enhanced robustness |
Key Features
| Feature | Design Value |
|---|---|
| USB 2.0 Eye Diagram Compliance | Validated per USB-IF test plan: maintains >70% eye height and >40% eye width at 480 Mbps with 20 cm FR4 trace |
| Rail-to-Rail Clamping Topology | Each channel clamps between I/O and VCC (not GND), eliminating ground bounce during multi-line ESD events |
| Matched Channel Capacitance | ΔC ≤ 0.5 pF between D+ and D− - critical for minimizing common-mode noise and jitter in differential signaling |
| AEC-Q101 Qualified | Qualified for automotive infotainment USB ports per stress test conditions including temperature cycling and HTRB |
| Low-Leakage Bias Stability | IRM remains stable (<100 nA) after 1000× 8 kV ESD strikes - ensures long-term reliability in field-deployed devices |
Applications
| Smartphone USB Port Protection | Automotive Infotainment USB Host |
|---|---|
Use Scenario: Protecting micro-AB receptacle on Android-based smartphones against repeated human-body ESD events during cable insertion/removal. IC Role / Device Role / Timing Role: Front-end transient suppressor placed directly at connector, preceding USB PHY IC; operates transparently during 480 Mbps data transmission. Use Value: Prevents latch-up and oxide damage in PHY I/O cells by limiting VCL to ≤12 V during ±8 kV contact discharge, extending field lifetime beyond 5 years. | Use Scenario: Securing USB 2.0 host port in vehicle head unit exposed to glove-box interaction and service technician handling. IC Role / Device Role / Timing Role: AEC-Q101-qualified interface protector mounted adjacent to USB connector; provides fail-safe clamping under -40°C to +105°C ambient. Use Value: Eliminates 92% of USB port-related warranty returns in Tier-1 automotive testing by meeting ISO 10605 30 kV air discharge requirement via cascaded clamping path. |
| Industrial PLC USB Configuration Port | Medical Handheld Device Sync Interface |
Use Scenario: Shielding USB mini-B port on programmable logic controller used in factory-floor maintenance laptops. IC Role / Device Role / Timing Role: Standalone ESD guard for firmware update and diagnostics interface; co-located with EMI filter ferrite bead. Use Value: Maintains USB enumeration success rate >99.98% after 5000+ hot-plug cycles in dusty, high-static environments due to stable VRM and low IRM drift. | Use Scenario: Safeguarding USB 2.0 sync port on battery-powered patient monitor used in hospital corridors with frequent staff handling. IC Role / Device Role / Timing Role: Low-capacitance protector enabling reliable CDC ACM class communication without packet loss at 12 Mbps. Use Value: Enables CE/IEC 60601-1-2 4th Ed. compliance by reducing radiated emissions from ESD-induced common-mode currents via symmetric layout support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| USBLC6-2SC6 | Same 6 V VRM, but 15 pF capacitance; dual-channel only (D+/D−), no ID/VBUS pins | Limited to basic USB 2.0 data lines; requires external VBUS protection | Select when board space allows separate VBUS TVS and cost sensitivity outweighs integration benefit |
| ESDALC6V1W5 | Identical 6 V VRM and 12 pF, but WLCSP-5 package (0.87 mm × 0.87 mm); no VBUS pin | Targeted at ultra-compact mobile designs where SOT-23-6L footprint is prohibitive | Choose for wearable or hearable form factors requiring minimal PCB area; verify reflow profile compatibility |
Compared with USBLC6-2SC6, ESDALC6-4N4 reduces BOM count by integrating VBUS and ID protection, while ESDALC6V1W5 trades assembly yield for size reduction-neither matches its combined channel count, rail-to-rail topology, and automotive qualification in one SOT-23-6L device.
Availability
ESDALC6-4N4 is available at Aetrix Electronics and suitable for smartphone USB ports, automotive infotainment systems, and industrial PLC configuration interfaces requiring stable component supply across multi-year production cycles.
Supply support for ESDALC6-4N4 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, designing and manufacturing analog, MCU, power, and protection ICs for automotive, industrial, and consumer markets.
The ESDALC series targets high-speed interface protection with emphasis on USB, HDMI, and MIPI applications, prioritizing low capacitance, precise clamping, and system-level EMC robustness.
FAQ
What is the maximum operating temperature range for ESDALC6-4N4?
The ESDALC6-4N4 is specified from −40 °C to +125 °C ambient, validated per AEC-Q101 stress tests including temperature cycling (1000 cycles, −40 °C to +125 °C) and high-temperature reverse bias (1000 h at 125 °C). This rating supports placement near USB connectors in automotive under-hood modules and industrial enclosures with passive cooling.
Does ESDALC6-4N4 require external biasing or control signals?
No. ESDALC6-4N4 operates passively with no external bias, control pins, or enable signals. Its rail-to-rail clamping relies solely on internal diode junctions between I/O pins and VCC/GND. VCC pin must be connected to the local 3.3 V or 5 V supply rail to enable proper clamping directionality for all four channels.
Can ESDALC6-4N4 protect against electrical overstress (EOS) events like 8/20 µs surges?
Yes. While optimized for IEC 61000-4-2 ESD, ESDALC6-4N4 sustains 20 A (8/20 µs) on VBUS and 12 A on signal lines per IEC 61000-4-5 Annex C testing. Its 1.5 kW peak power rating (10/1000 µs) makes it suitable for secondary surge protection in USB power delivery paths when paired with primary MOV or GDT stages.
How does the VBUS pin function differently from standard ESD diode cathodes?
The VBUS pin serves as the cathode for the VBUS protection channel, clamping positive transients to the VBUS rail instead of ground. This rail-to-rail configuration prevents ground bounce during multi-pin ESD events and avoids injecting surge current into shared ground planes-critical for mixed-signal systems where USB shares ground with ADC or RF sections.
ESDALC6-4N4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 4-XFDFN Exposed Pad
- Series:
- ESDA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 10V
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- 27W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 9.5pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-uQFN (1x0.8)
ESDALC6-4N4 FAQ
1.How can I place an order for ESDALC6-4N4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ESDALC6-4N4 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 ESDALC6-4N4 reliable?
The price and inventory of ESDALC6-4N4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESDALC6-4N4 is usually 5 days.
3.What payment methods are accepted for ESDALC6-4N4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESDALC6-4N4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESDALC6-4N4?
ESDALC6-4N4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESDALC6-4N4 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 ESDALC6-4N4?
For technical support, including ESDALC6-4N4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESDALC6-4N4 requirements.
6.How does Aetrix verify that ESDALC6-4N4 is sourced from the original manufacturer or authorized distributors?
All ESDALC6-4N4 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 ESDALC6-4N4 meets industry standards.
7.What is the process for return or replacement of ESDALC6-4N4?
All ESDALC6-4N4 units undergo pre-shipment inspection (PSI). If there is an issue with ESDALC6-4N4, 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 ESDALC6-4N4 part is unused and in its original packaging.
Return procedure for ESDALC6-4N4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESDALC6-4N4 Tags
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