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STMicroelectronics DVIULC6-4SC6
- Part No.:
- DVIULC6-4SC6
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
DVIULC6-4SC6.pdf
- Description:
- TVS DIODE 5VWM 17VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:20,877
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Product details
Overview
DVIULC6-4SC6 from STMicroelectronics is a monolithic 4-line ESD protection device for high-speed digital interfaces, featuring 0.6 pF I/O-to-GND capacitance at 825 MHz, ±15 kV air/±8 kV contact ESD immunity per IEC 61000-4-2 Level 4, and SOT23-6L package. It protects DVI, HDMI, IEEE 1394, USB 2.0, and Ethernet data lines while maintaining signal integrity up to 1.65 Gb/s.
For engineers reviewing the DVIULC6-4SC6 datasheet, DVIULC6-4SC6 pinout, DVIULC6-4SC6 application, or DVIULC6-4SC6 equivalent, key selection criteria include ultralow inter-pair capacitance skew (0.007 pF), VBUS-enabled clamping topology, leakage current ≤0.5 µA at 5 V, and rail-to-rail surge response optimized for TMDS and differential signaling paths.
Technical Context
The DVIULC6-4SC6 implements a rail-to-rail clamping architecture with dedicated VBUS and GND terminals, enabling bidirectional ESD current shunting during positive and negative transients. Its monolithic silicon design integrates four matched TVS diodes with tightly controlled capacitance matching: ΔCI/O–GND = 0.015 pF and ΔCI/O–I/O = 0.007 pF.
Clamping voltage is defined as VCL+ = VVBUS + VF for positive surges and VCL− = −VF for negative surges, where VF = VT + Rd·Ip; typical dynamic resistance is 1.4 Ω and forward threshold is 1.2 V. Layout-dependent parasitic inductance directly impacts effective clamping voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±15 kV air / ±8 kV contact per IEC 61000-4-2 Level 4 - guarantees system-level immunity without external circuitry |
| I/O-to-GND Capacitance | 0.6 pF at 825 MHz - preserves signal rise/fall times and minimizes distortion on 1.65 Gb/s TMDS links |
| Intra-pair Capacitance Skew | 0.007 pF - ensures sub-picosecond differential skew for HDMI/DVI pixel clock and data pair alignment |
| Leakage Current | ≤0.5 µA at 5 V - extends battery life in portable HDMI sources and USB 2.0 peripherals |
| Clamping Voltage | 12 V at 1 A / 17 V at 5 A (8/20 µs) - limits transient overvoltage seen by downstream PHY receivers |
| Package | SOT23-6L (JEDEC MO178AB), 9 mm² footprint - enables compact placement adjacent to DVI/HDMI connectors |
Pinout & Package
SOT23-6L package per JEDEC MO178AB: 3.05 mm × 1.75 mm × 1.30 mm body, 0.95 mm lead pitch, lead-free and RoHS compliant, UL94 V0 epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | I/O1 | Protected data line (e.g., DVI TMDS Data0+ or HDMI Data1+) |
| 2 | I/O2 | Protected data line (e.g., DVI TMDS Data0− or HDMI Data1−) |
| 3 | GND | Low-inductance return path for ESD current - must connect directly to PCB ground plane |
| 4 | I/O3 | Protected data line (e.g., DVI TMDS Clock+ or HDMI Clock+) |
| 5 | I/O4 | Protected data line (e.g., DVI TMDS Clock− or HDMI Clock−) |
| 6 | VBUS | Supply rail clamp terminal - connects to +5 V source to enable rail-to-rail clamping during positive ESD events |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow capacitance matching | 0.007 pF intra-pair skew ensures <100 fs differential timing mismatch on 1.65 Gb/s links |
| Rail-to-rail clamping topology | Enables symmetric clamping above/below VBUS using single VBUS pin - eliminates need for dual-rail supply |
| Monolithic integration | Four matched ESD diodes on one die - guarantees process-tracked parameter consistency vs. discrete arrays |
| Optimized for TMDS signaling | Frequency response flat to 1 GHz (S21 > −3 dB) - supports full HDMI 1.3 bandwidth without insertion loss penalty |
Applications
| DVI/HDMI Digital Link Protection | IEEE 1394 FireWire Interface |
|---|---|
|
Use Scenario: Protecting TMDS channels between graphics controller and LCD monitor in desktop PCs or set-top boxes. IC Role / Device Role / Timing Role: ESD transient suppressor placed within 5 mm of DVI/HDMI connector, clamping surges before they reach SerDes receiver inputs. Use Value: Maintains <0.5% bit error rate at 1.65 Gb/s by limiting inter-pair capacitance variation to 0.007 pF and preserving edge fidelity. |
Use Scenario: Safeguarding IEEE 1394a/b data pairs in camcorders and audio interfaces against connector-based ESD. IC Role / Device Role / Timing Role: Bidirectional line protector on differential data lanes (TPA/TPB), referenced to local 3.3 V supply via VBUS pin. Use Value: Enables reliable hot-plug operation at 1.6 Gb/s by suppressing ±8 kV contact discharges without degrading jitter budget. |
| USB 2.0 High-Speed Port | Ethernet 10/100/1000BASE-T |
|
Use Scenario: ESD hardening of D+/D− lines in USB 2.0 host controllers on embedded motherboards. IC Role / Device Role / Timing Role: Low-capacitance shunt protector with matched D+/D− CI/O–I/O = 0.3 pF at 825 MHz, connected directly to USB receptacle pins. Use Value: Prevents enumeration failure after repeated ±15 kV air discharge events while sustaining 480 Mb/s eye diagram compliance. |
Use Scenario: Protecting Ethernet PHY differential pairs (RX+/RX−, TX+/TX−) in industrial gateways and PoE switches. IC Role / Device Role / Timing Role: Four-channel ESD clamp on MDI lines, leveraging VBUS connection to 3.3 V or 5 V bias rail for rail-to-rail clamping. Use Value: Achieves EN 61000-4-2 Level 4 immunity without compromising 1000BASE-T return loss or NEXT margin due to <0.85 pF I/O–GND capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1002-04UTG | 0.35 pF I/O–GND at 1 MHz; no VBUS pin - uses ground-referenced clamping only | Lacks rail-to-rail capability; unsuitable for VBUS-coupled surge paths in DVI/HDMI | Select when protecting low-voltage (1.8–3.3 V) interfaces without VBUS routing constraints |
| ESD5V3U4-2/TR | 0.5 pF I/O–GND at 1 MHz; integrated 100 nF decoupling capacitor on VBUS line | Requires no external 100 nF bypass cap; higher layout tolerance for VBUS trace inductance | Prefer for space-constrained designs where adding discrete 100 nF near connector is impractical |
Compared with SP1002-04UTG and ESD5V3U4-2/TR, the DVIULC6-4SC6 uniquely combines VBUS-referenced clamping, 0.007 pF intra-pair capacitance matching, and 825 MHz validated 0.6 pF performance - making it the only option qualified for production HDMI 1.3 and DVI 1.0 link integrity requirements.
Availability
DVIULC6-4SC6 is available at Aetrix Electronics and suitable for HDMI video transmission systems, USB 2.0 peripheral interfaces, and industrial Ethernet equipment requiring stable component supply across multi-year production cycles.
Supply support for DVIULC6-4SC6 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, designing and manufacturing analog, MCU, power, and protection ICs for automotive, industrial, and consumer markets.
The DVIULC6-4SC6 belongs to ST's Ultra-Low Capacitance ESD Protection product line, engineered specifically for preserving signal integrity on high-speed serial links while delivering certified IEC 61000-4-2 Level 4 immunity.
FAQ
What is the maximum data rate supported by the DVIULC6-4SC6?
The DVIULC6-4SC6 supports data rates up to 1.65 Gb/s, verified by frequency response measurements showing <−3 dB attenuation up to 1 GHz and analog crosstalk <−45 dB below 240 MHz. This matches HDMI 1.3 and DVI 1.0 specifications, and is confirmed by eye diagram testing in TMDS link configurations.
Why does the DVIULC6-4SC6 require a VBUS connection?
The VBUS pin enables rail-to-rail clamping: during positive ESD transients, current shunts from I/O to VBUS; during negative transients, current shunts from I/O to GND. Without VBUS connection, clamping voltage rises significantly - e.g., +183 V instead of +39 V - due to parasitic inductance in long VCC traces.
How critical is PCB layout for achieving rated ESD performance?
Layout is critical: VBUS and GND traces must be ≤10 mm long and ≥0.5 mm wide to limit parasitic inductance. A 100 nF ceramic capacitor between VBUS and GND, placed within 2 mm of the device, is mandatory to suppress inductive overshoot. Layout deviations cause clamping voltage to exceed 170 V, risking PHY damage.
Does the DVIULC6-4SC6 protect all four lines equally?
Yes - all four I/O pins (1, 2, 4, 5) exhibit matched electrical characteristics: identical I/O–GND capacitance (0.6 pF typ. at 825 MHz), ±0.015 pF matching tolerance, and symmetrical clamping voltage (12 V @ 1 A). This matching is process-controlled on a single monolithic die, ensuring consistent protection across TMDS data and clock pairs.
DVIULC6-4SC6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOT-23-6
- Series:
- DVI
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 80W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.85pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
DVIULC6-4SC6 FAQ
1.How can I place an order for DVIULC6-4SC6 through Aetrix?
Please submit a Request for Quotation (RFQ) for DVIULC6-4SC6 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 DVIULC6-4SC6 reliable?
The price and inventory of DVIULC6-4SC6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DVIULC6-4SC6 is usually 5 days.
3.What payment methods are accepted for DVIULC6-4SC6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DVIULC6-4SC6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DVIULC6-4SC6?
DVIULC6-4SC6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DVIULC6-4SC6 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 DVIULC6-4SC6?
For technical support, including DVIULC6-4SC6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DVIULC6-4SC6 requirements.
6.How does Aetrix verify that DVIULC6-4SC6 is sourced from the original manufacturer or authorized distributors?
All DVIULC6-4SC6 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 DVIULC6-4SC6 meets industry standards.
7.What is the process for return or replacement of DVIULC6-4SC6?
All DVIULC6-4SC6 units undergo pre-shipment inspection (PSI). If there is an issue with DVIULC6-4SC6, 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 DVIULC6-4SC6 part is unused and in its original packaging.
Return procedure for DVIULC6-4SC6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DVIULC6-4SC6 Tags
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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