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STMicroelectronics DALC208SC6Y
- Part No.:
- DALC208SC6Y
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
DALC208SC6Y.pdf
- Description:
- TVS DIODE 9VWM SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,232
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Product details
Overview
DALC208SC6Y from STMicroelectronics is an automotive-grade, monolithic low-capacitance diode array for ESD and EOS transient protection of four high-speed data lines. It features rail-to-rail clamping (VREF1 = GND, VREF2 = VCC), 9 V peak reverse voltage per diode, <5 pF typical input capacitance, <1 µA leakage at 5 V, and AEC-Q101 qualification - deployed in infotainment serial interfaces and CAN/LIN bus I/O protection.
For engineers reviewing the DALC208SC6Y datasheet, DALC208SC6Y pinout, DALC208SC6Y application, or DALC208SC6Y equivalent, this page delivers verified electrical specs, SOT23-6L terminal mapping, ISO 10605/7637-3 compliance data, layout-critical clamping behavior, and validated alternatives for automotive signal line hardening.
Technical Context
The DALC208SC6Y implements a rail-to-rail topology with two reference terminals (REF1 = GND, REF2 = VCC) enabling bidirectional clamping: VCL+ = VREF2 + VF and VCL− = VREF1 − VF. Its monolithic structure integrates eight diodes (four differential pairs) with matched dynamic resistance (~0.7 Ω) and forward threshold (~1.2 V).
Clamping performance is layout-sensitive: parasitic inductance >6 nH on REF1/REF2 traces raises VCL to ±167 V under IEC 61000-4-2 contact discharge (8 kV), while optimized routing + 100 nF local decoupling restores clamping to ±23 V/±18 V - confirming its role as a PCB-level ESD mitigation element, not a system-level suppressor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 9 V per diode - sets maximum DC operating voltage before reverse breakdown |
| C (I/O to GND) | 7 pF typ., 10 pF max - ensures minimal signal distortion on USB, I²C, LIN up to 100 MHz |
| IR @ VR = 5 V | <1 µA - avoids loading of high-impedance logic inputs or sensor outputs |
| VCL+ / VCL− | +23 V / −18 V (IEC 61000-4-2, 8 kV contact, ideal layout) - defines protected IC's voltage stress envelope |
| ESD Rating | ±15 kV air / ±8 kV contact (ISO 10605, 150 pF/330 Ω) - meets automotive interior ESD immunity requirements |
| Tj Range | −40 °C to +150 °C - supports under-hood and cabin-mounted ECUs without derating |
| AEC-Q101 | Qualified - validates reliability for automotive electronics per stress test standard |
Pinout & Package
Package: SOT23-6L - lead-free, UL94 V0 epoxy, 1.45 mm height, 3.05 mm × 1.75 mm footprint, designed for automated reflow assembly per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I/O 1 | Data line 1 anode/cathode junction | Protected signal path; clamped between REF1 (GND) and REF2 (VCC) |
| I/O 2 | Data line 2 anode/cathode junction | Independent protection channel; no internal coupling to I/O 1 |
| I/O 3 | Data line 3 anode/cathode junction | Supports multi-line interface like RS-485 or quad-SPI |
| I/O 4 | Data line 4 anode/cathode junction | Enables full protection of 4-wire automotive sensors or displays |
| REF 1 | Lower rail reference | Must be connected directly to system GND; determines negative clamping level |
| REF 2 | Upper rail reference | Must be connected directly to VCC (e.g., 5 V or 3.3 V); determines positive clamping level |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail clamping architecture | Enables precise, symmetric overvoltage limiting referenced to actual system rails - eliminates need for external bias resistors |
| 7 pF typical line-to-GND capacitance | Preserves signal integrity on 50 Mbps LIN or 400 kHz I²C buses without rise-time degradation or reflection |
| Monolithic 4-channel integration | Reduces PCB area by >60% vs. discrete TVS + diode solutions while ensuring parameter matching across channels |
| AEC-Q101 qualification | Validates robustness against temperature cycling, mechanical shock, and humidity exposure required for automotive production |
| ISO 10605/7637-3 compliance | Meets OEM-level ESD and load-dump immunity mandates for body control modules and infotainment head units |
Applications
| Infotainment Serial Interfaces | LIN Bus Node Protection |
|---|---|
Use Scenario: Protecting UART, I²C, or SPI lines between MCU and display/audio ICs in automotive head units. IC Role / Device Role / Timing Role: Bidirectional ESD clamp placed within 5 mm of connector, referenced to same VCC/GND as protected IC. Use Value: Prevents latch-up or gate oxide damage during assembly handling or field ESD events while maintaining 100 kHz–1 MHz signal fidelity. | Use Scenario: Safeguarding LIN transceiver I/O pins in door modules or seat controllers exposed to cable harness ESD. IC Role / Device Role / Timing Role: Low-capacitance shunt device tied to LIN bus and local VCC/GND, absorbing ±8 kV contact discharges. Use Value: Maintains LIN physical layer timing (dominant/recessive thresholds) with <100 ps added jitter due to sub-10 pF loading. |
| Automotive Sensor Signal Conditioning | Body Control Module I/O Protection |
Use Scenario: Shielding analog/digital outputs of pressure, temperature, or position sensors in engine bay or chassis locations. IC Role / Device Role / Timing Role: Front-end transient suppressor on sensor output trace, placed before ADC input or level-shifter. Use Value: Blocks EOS pulses from relay switching or alternator load dump without attenuating mV-level sensor signals. | Use Scenario: Hardening GPIO, PWM, or switch sense inputs in BCMs managing lighting, wipers, or HVAC actuators. IC Role / Device Role / Timing Role: Rail-referenced clamp on each digital input line, with REF1/REF2 routed to local power domain. Use Value: Eliminates false triggering caused by ESD-induced voltage spikes exceeding MCU input thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESDALC6V1-1U2 | Single-channel, 6.1 V VBR, 0.6 pF C, SOD-323 package | Lower capacitance but no rail-to-rail topology - requires external bias for bidirectional clamping | Prefer when protecting ultra-high-speed lines (>1 Gbps) where sub-1 pF is mandatory and board space allows discrete placement per line |
| TPD2E001DRYR | Two-channel, 5.5 V VBR, 11 pF C, SOT-563 package, ±15 kV ESD rating | Higher capacitance limits use to ≤10 Mbps interfaces; lacks AEC-Q101 qualification | Select for cost-sensitive non-automotive industrial controls where AEC-Q101 is not required and layout constraints favor smaller footprint |
Compared with ESDALC6V1-1U2 and TPD2E001DRYR, the DALC208SC6Y uniquely combines four-channel integration, rail-to-rail operation, AEC-Q101 qualification, and <10 pF capacitance - making it the only option qualified for production automotive serial bus protection without external bias components or layout compromises.
Availability
DALC208SC6Y is available at Aetrix Electronics and suitable for automotive infotainment systems, LIN/UART-based body electronics, and sensor interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DALC208SC6Y 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 microcontrollers, power ICs, sensors, and protection devices for automotive, industrial, and consumer markets.
The DALC series targets automotive ESD protection with monolithic, rail-to-rail architectures optimized for ISO 10605/7637-3 compliance and seamless integration into space-constrained ECU designs.
FAQ
What is the maximum recommended trace length between REF1/REF2 and system GND/VCC?
ST specifies that REF1 and REF2 traces must be as short as possible - ideally ≤3 mm - to limit parasitic inductance. Layouts with >6 nH inductance cause clamping voltage overshoot exceeding ±160 V during 8 kV ESD events. Use solid ground planes and direct vias to minimize loop area.
Can DALC208SC6Y protect against ISO 7637-3 Pulse 3a (−150 V) without additional components?
Yes - the DALC208SC6Y is rated for ISO 7637-3 Pulse 3a (−150 V) and Pulse 3b (+100 V) per datasheet Table 1. Its rail-to-rail structure clamps transients between VREF1 and VREF2, provided those references are tied to robust system GND and VCC rails capable of sinking/source the surge current.
Does the 7 pF capacitance apply to all four I/O lines simultaneously?
Yes - the 7 pF typical capacitance is measured per I/O line to GND (with REF1 = GND, REF2 = VCC, and other I/Os open), confirmed in Figure 6 of the datasheet. All four channels exhibit matched capacitance within ±15%, critical for differential signal integrity.
Is a 100 nF capacitor mandatory on the REF2 line?
No - the 100 nF capacitor is a layout optimization for cases where REF2 trace inductance cannot be reduced below 6 nH. If REF2 connects directly to a low-impedance VCC plane within 3 mm, the capacitor is unnecessary. Its inclusion improves clamping consistency but adds BOM cost and footprint.
DALC208SC6Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 9V
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 10pF @ 1MHz
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
DALC208SC6Y FAQ
1.How can I place an order for DALC208SC6Y through Aetrix?
Please submit a Request for Quotation (RFQ) for DALC208SC6Y 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 DALC208SC6Y reliable?
The price and inventory of DALC208SC6Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DALC208SC6Y is usually 5 days.
3.What payment methods are accepted for DALC208SC6Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DALC208SC6Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DALC208SC6Y?
DALC208SC6Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DALC208SC6Y 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 DALC208SC6Y?
For technical support, including DALC208SC6Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DALC208SC6Y requirements.
6.How does Aetrix verify that DALC208SC6Y is sourced from the original manufacturer or authorized distributors?
All DALC208SC6Y 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 DALC208SC6Y meets industry standards.
7.What is the process for return or replacement of DALC208SC6Y?
All DALC208SC6Y units undergo pre-shipment inspection (PSI). If there is an issue with DALC208SC6Y, 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 DALC208SC6Y part is unused and in its original packaging.
Return procedure for DALC208SC6Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DALC208SC6Y Tags
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