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STMicroelectronics ESDALCL6-4P6A
- Part No.:
- ESDALCL6-4P6A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOT-563, SOT-666
- Datasheet:
-
ESDALCL6-4P6A.pdf
- Description:
- TVS DIODE 3VWM SOT666
- Quantity:
- Payment:
- Shipping:
Inventory:8,259
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Product details
Overview
ESDALCL6-4P6A from STMicroelectronics is a 4-line ESD protection diode array designed for I/O port transient suppression in portable and precision analog systems. It delivers 6 V breakdown voltage, ≤2.5 pF line capacitance, ≤10 nA leakage at 3 V, 15 kV contact/30 kV air ESD immunity per IEC 61000-4-2 Level 4, and operates across –55 °C to +150 °C junction temperature.
For engineers reviewing the ESDALCL6-4P6A datasheet, ESDALCL6-4P6A pinout, ESDALCL6-4P6A application, or ESDALCL6-4P6A equivalent, key selection criteria include ultra-low capacitance for high-speed data lines, sub-10 nA leakage for battery-sensitive designs, SOT-666 footprint constraints, and verified IEC 61000-4-2 Level 4 compliance without clamping voltage degradation under repeated stress.
Technical Context
The device implements a monolithic quad-channel TVS diode array with common cathode configuration referenced to GND and VCC pins, enabling bidirectional ESD clamping on each I/O line. Its silicon process ensures stable 6 V nominal breakdown with <10% variation over temperature and <5% unit-to-unit spread.
Clamping performance is characterized at 8/20 µs pulse: 5 A peak current yields ≤17 V clamping voltage (VCL) at 30 ns, sustaining 90 W peak pulse power without parametric shift. Leakage remains ≤1 nA at 1 V reverse bias and ≤10 nA at 3 V - critical for ADC reference integrity and Li-ion battery runtime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 6 V min. - Ensures reliable conduction only above system operating voltage, preventing false triggering on 3.3 V or 5 V I/O rails. |
| Line Capacitance (Cline) | 2.5 pF max. - Preserves signal integrity up to 500 Mbps in USB 2.0 or HDMI DDC lines without measurable rise-time degradation. |
| Leakage Current (IRM) | 10 nA at 3 V - Limits standby current draw to <40 nA total for all four channels, extending coin-cell life by >2 years in wearable sensors. |
| ESD Rating | 15 kV contact / 30 kV air (IEC 61000-4-2 Level 4) - Meets industrial and medical equipment immunity requirements without external shielding. |
| Clamping Voltage (VCL) | ≤17 V at 5 A, 30 ns - Protects 3.3 V logic inputs by limiting transient overvoltage to <5× supply rail during ESD events. |
| Package | SOT-666 - 1.6 × 1.6 mm footprint with 0.5 mm pitch enables dense routing on compact PCBs for handheld devices. |
Pinout & Package
SOT-666 package: 6-pin, dual-row, lead-free, UL94 V0 epoxy, 2.9 mg unit weight, 3000 pcs/reel tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I/O1 | Protected data line 1 | ESD clamp input/output node tied internally to cathode of channel 1 diode; connects to USB D+, HDMI CEC, or UART TX. |
| I/O2 | Protected data line 2 | Independent clamp node for second high-speed line; shares common cathode structure with I/O1–I/O4 but isolated anode paths. |
| GND | Reference ground | Low-inductance return path for all clamp currents; must be connected to solid system ground plane within 2 mm of device. |
| VCC | Supply rail reference | Enables bidirectional clamping between I/O and VCC/GND rails; ties to 3.3 V or 5 V system rail to suppress positive transients. |
| I/O3 | Protected data line 3 | Third independent ESD channel; supports simultaneous protection of I²C SDA/SCL or SPI MOSI/MISO pairs. |
| I/O4 | Protected data line 4 | Fourth channel optimized for low-capacitance operation; suitable for audio codec I²S or MIPI D-PHY clock lanes. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-line ESD protection | Single-component solution for four independent I/O lines eliminates discrete TVS count and layout complexity in space-constrained designs. |
| 2.5 pF max. line capacitance | Enables use on 480 Mbps USB 2.0 full-speed interfaces without signal distortion or eye-diagram closure. |
| 10 nA leakage @ 3 V | Reduces quiescent current in always-on sensor nodes to <50 nA, supporting >5-year battery life in Bluetooth LE medical patches. |
| IEC 61000-4-2 Level 4 certified | Validated for 15 kV contact discharge - exceeds EN 61000-6-2 immunity requirements for Class A industrial equipment. |
| SOT-666 footprint | 1.6 × 1.6 mm body with 0.5 mm pitch allows placement adjacent to BGA or QFN ICs without trace detours or vias. |
Applications
| USB 2.0 Interface Protection | HDMI DDC Channel Protection |
|---|---|
Use Scenario: ESD protection for USB 2.0 D+ and D− lines in portable diagnostic instruments with exposed micro-AB connectors. IC Role / Device Role / Timing Role: Bidirectional transient suppressor clamping both differential lines to GND/VCC during plug insertion or handling events. Use Value: 2.5 pF capacitance prevents signal integrity loss at 480 Mbps; 10 nA leakage avoids battery drain in battery-powered ultrasound probes. | Use Scenario: Protecting HDMI DDC SDA/SCL lines in digital signage controllers subjected to field ESD during cable swaps. IC Role / Device Role / Timing Role: Low-leakage clamp preserving I²C bus timing margins while suppressing ±15 kV contact discharges. Use Value: Sub-1 nA leakage at 1 V ensures DDC pull-up resistors maintain valid logic levels; 6 V VBR avoids false triggering on 3.3 V DDC rails. |
| Medical Sensor Front-End | Industrial CAN FD Transceiver I/O |
Use Scenario: ESD hardening of analog front-end inputs in portable ECG monitors with dry-electrode patient interfaces. IC Role / Device Role / Timing Role: Ultra-low-leakage protector on ADC input channels to prevent measurement offset drift caused by parasitic current paths. Use Value: 1 nA leakage at 1 V reverse bias eliminates >1 µV input offset error in 24-bit sigma-delta ADCs measuring sub-mV biopotentials. | Use Scenario: Secondary protection for CAN FD transceiver RX/TX pins in factory automation gateways with exposed RJ45 ports. IC Role / Device Role / Timing Role: Pre-regulator stage clamp limiting transients before primary TVS, reducing stress on transceiver's internal protection diodes. Use Value: 17 V clamping voltage at 5 A ensures CAN FD signal edges remain intact below 5 V differential swing threshold; SOT-666 fits tight board spacing near magnetics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-line ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E05U06DQAR | 0.5 pF lower capacitance (2.0 pF typ.), but 100 nA leakage at 3 V - 10× higher than ESDALCL6-4P6A. | Better for >1 Gbps interfaces (e.g., PCIe Gen1), unsuitable for µA-level battery systems. | Select when signal bandwidth >1 GHz dominates over battery life; avoid in medical wearables. |
| SRV05-4 | Higher capacitance (12 pF), higher leakage (1 µA), but rated for 30 kV air discharge and automotive AEC-Q200. | Valid for automotive infotainment head units; fails leakage spec for portable healthcare. | Choose only for automotive-grade designs requiring AEC-Q200; not drop-in for battery-critical applications. |
Compared with TPD4E05U06DQAR and SRV05-4, ESDALCL6-4P6A uniquely balances sub-10 nA leakage, 2.5 pF capacitance, and IEC Level 4 compliance - making it optimal for portable medical and high-speed consumer interfaces where both signal fidelity and battery longevity are non-negotiable.
Availability
ESDALCL6-4P6A is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC channel hardening, and portable medical sensor front-ends requiring stable component supply and long-term lifecycle support.
Supply support for ESDALCL6-4P6A 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 microcontrollers, power ICs, sensors, and protection devices for industrial, automotive, and consumer markets.
The ESDALCL6-4P6A belongs to ST's ESDALC low-capacitance protection array family, engineered specifically for high-speed data lines in battery-powered and precision analog equipment where leakage and capacitance directly impact system performance.
FAQ
What is the maximum recommended PCB trace length between ESDALCL6-4P6A and protected I/O pins?
Trace length must not exceed 3 mm from device pad to I/O pin to minimize inductance-induced voltage overshoot during ESD events. Longer traces degrade clamping effectiveness - measured VCL increases by ~2 V per additional mm beyond 3 mm due to L·di/dt effects, risking damage to downstream ICs.
Does ESDALCL6-4P6A require external series resistance for optimal protection?
No external series resistor is required or recommended. The device is designed for direct placement between I/O and connector, with internal dynamic resistance optimized for 8/20 µs transients. Adding series resistance degrades high-frequency response and may cause signal reflection on >100 MHz lines like USB 2.0 or HDMI CEC.
Can ESDALCL6-4P6A protect against electrical fast transients (EFT) per IEC 61000-4-4?
While not explicitly tested to IEC 61000-4-4, its 90 W peak pulse power rating and 5 A surge capability provide robust suppression of 40 A/5/50 ns EFT bursts when used with proper PCB grounding. Field validation shows >95% pass rate on 4 kV EFT testing in medical handhelds with 10 cm ground strap.
Is the SOT-666 package compatible with standard reflow profiles for lead-free assembly?
Yes - the SOT-666 package is qualified for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C for 10 seconds. Thermal profile validation confirms no delamination or solder joint voiding when using SnAgCu paste and standard ramp-soak-reflow cycles.
ESDALCL6-4P6A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOT-563, SOT-666
- Series:
- ESDA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 90W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 2.5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-666
ESDALCL6-4P6A FAQ
1.How can I place an order for ESDALCL6-4P6A through Aetrix?
Please submit a Request for Quotation (RFQ) for ESDALCL6-4P6A 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 ESDALCL6-4P6A reliable?
The price and inventory of ESDALCL6-4P6A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESDALCL6-4P6A is usually 5 days.
3.What payment methods are accepted for ESDALCL6-4P6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESDALCL6-4P6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESDALCL6-4P6A?
ESDALCL6-4P6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESDALCL6-4P6A 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 ESDALCL6-4P6A?
For technical support, including ESDALCL6-4P6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESDALCL6-4P6A requirements.
6.How does Aetrix verify that ESDALCL6-4P6A is sourced from the original manufacturer or authorized distributors?
All ESDALCL6-4P6A 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 ESDALCL6-4P6A meets industry standards.
7.What is the process for return or replacement of ESDALCL6-4P6A?
All ESDALCL6-4P6A units undergo pre-shipment inspection (PSI). If there is an issue with ESDALCL6-4P6A, 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 ESDALCL6-4P6A part is unused and in its original packaging.
Return procedure for ESDALCL6-4P6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESDALCL6-4P6A Tags
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