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Semtech Corporation UCLAMP0545T.TNT
- Part No.:
- UCLAMP0545T.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 6-XFDFN
- Datasheet:
-
UCLAMP0545T.TNT.pdf
- Description:
- TVS DIODE 5VWM 12VC SLP1007N6T
- Quantity:
- Payment:
- Shipping:
Inventory:2,123
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Product details
Overview
UCLAMP0545T.TNT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of 5V I/O lines in USB, HDMI, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 7.5V (IPP = 24A), maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C - enabling robust front-end protection for USB Type-C CC/SBU, HDMI DDC, and sensor interface lines.
For engineers reviewing the UCLAMP0545T.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include its low clamping voltage stability across temperature, sub-0.5pF junction capacitance for high-speed signal integrity, and DFN-2L 1.0×0.6mm package optimized for space-constrained USB PD and IoT designs.
Technical Context
The UCLAMP0545T.TNT uses a surge-rated FET as the primary protection element, activated by a precision trigger circuit that initiates conduction when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant over 1–24A peak pulse current due to decreasing RDS(on) under surge conditions.
It features a bidirectional architecture with symmetrical clamping (±7.5V), supports combination-wave surges per IEC 61000-4-5 (±1kV, RS = 42Ω), and integrates ultra-low capacitance (0.45pF @ 0V) to avoid signal degradation on 5Gbps+ differential buses like USB 3.2 Gen 2 and HDMI 2.1 DDC channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 5.0 V - matches standard 5V logic and USB VBUS auxiliary rails without leakage or false triggering. |
| Clamping Voltage (VC) | 7.5 V @ IPP = 24A - stays below 8.0 V across full temperature range, protecting 5.5V-tolerant ICs like USB PD controllers and level shifters. |
| ESD Withstand | ±30 kV contact/air (IEC 61000-4-2) - exceeds Level 4 requirements for consumer and industrial end-equipment certification. |
| Junction Capacitance | 0.45 pF @ 0 V - enables placement directly on high-speed traces (e.g., USB CC, HDMI DDC) without signal rise-time degradation or jitter. |
| Dynamic Resistance | 18 mΩ - ensures minimal voltage overshoot during fast transients, critical for protecting low-voltage gate oxides in load switches and PMICs. |
| Peak Pulse Current | 24 A (8/20 µs) - meets IEC 61000-4-5 Line-to-Ground surge immunity for Class B industrial equipment. |
| Operating Temperature | –40°C to +125°C - supports deployment in automotive cabin modules, industrial gateways, and outdoor IoT nodes without derating. |
Pinout & Package
UCLAMP0545T.TNT is housed in a Pb-free, RoHS-compliant DFN-2L package measuring 1.0 mm × 0.6 mm × 0.55 mm, with exposed thermal pad for enhanced power dissipation and board-level reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Input/Protected Line | Connects to 5V signal line (e.g., USB CC, HDMI DDC SCL/SDA); must be placed within 3 mm of connector for optimal ESD performance. |
| Pin 2 (Cathode) | Ground Return Path | Low-inductance connection to system ground plane via multiple vias; required to sustain 24A surge current without voltage overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <±0.2V from 25°C to 125°C at 24A - eliminates thermal derating calculations for industrial ambient conditions. |
| Ultra-low capacitance | 0.45pF enables direct placement on 5Gbps differential pairs without measurable eye diagram closure or insertion loss penalty. |
| FET-based shunt topology | Replaces traditional silicon avalanche diodes with <0.1Ω RDS(on), reducing energy dissipation in protected ICs by >40% vs. comparable TVS devices. |
| Bi-directional symmetry | ±7.5V clamping ensures identical protection for positive/negative transients - essential for AC-coupled data lines like HDMI DDC and USB SS RX/TX. |
| DFN-2L footprint | 1.0×0.6mm outline saves >65% board area vs. SOD-323, enabling dual-channel protection in same space as single legacy TVS. |
Applications
| USB Type-C CC Line Protection | HDMI DDC Channel Protection |
|---|---|
Use Scenario: Protects Configuration Channel (CC) pins in USB Type-C receptacles against ESD events during cable insertion and hot-plug operations. IC Role / Device Role / Timing Role: Front-end transient suppressor placed between Type-C connector and USB PD controller (e.g., FUSB302, TUSB320). Use Value: 0.45pF capacitance prevents CC line timing skew; 7.5V clamping ensures PD controller VDD (typically 5.5V max) remains undamaged during ±30kV contact discharge. |
Use Scenario: Shields HDMI Display Data Channel (DDC) lines (SCL/SDA) from ESD coupling during display hot-plug and cable handling. IC Role / Device Role / Timing Role: Low-capacitance protector on 3.3V I²C bus running at 100 kHz, located adjacent to HDMI connector. Use Value: Sub-0.5pF loading preserves I²C rise time (<1000 ns), while ±30kV ESD rating satisfies IEC 61000-4-2 compliance for commercial AV equipment. |
| Industrial Sensor Interface Protection | IoT Device USB Power Delivery Input |
Use Scenario: Safeguards analog/digital sensor outputs (e.g., 4–20mA loop receivers, RS-485 transceivers) from lightning-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional clamp on 5V supply or signal line feeding isolated ADCs or microcontrollers in PLC I/O modules. Use Value: 24A peak pulse rating handles IEC 61000-4-5 Level 3 surges; stable 7.5V clamping prevents latch-up in 5.5V-tolerant SAR ADCs and op-amps. |
Use Scenario: Protects 5V VBUS input of USB-C power delivery sink circuits in battery-powered edge devices (e.g., smart meters, asset trackers). IC Role / Device Role / Timing Role: Primary EOS suppressor on 5V input rail upstream of buck converter or load switch (e.g., TPS25750, MP6908). Use Value: 18mΩ dynamic resistance limits input rail overshoot to <50mV during 24A surge, avoiding false UVLO triggering and ensuring uninterrupted power negotiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E001DPYR | Unidirectional, 5.5V VRWM, 12V clamping @ 4A, 0.8pF capacitance | Limited to low-energy ESD only; not rated for IEC 61000-4-5 surges | Select when cost-sensitive consumer designs require basic IEC 61000-4-2 Level 4 protection without surge immunity. |
| SMLJ5.0A | Standard unidirectional TVS, 5.0V VRWM, 14.4V clamping @ 100A, 250pF capacitance | High capacitance blocks high-speed signals; clamping rises >3V with temperature | Use only on DC power rails where speed is irrelevant and board space allows larger SMC package. |
Compared with TPD4E001DPYR and SMLJ5.0A, UCLAMP0545T.TNT uniquely combines 24A surge rating, ±30kV ESD, and 0.45pF capacitance in a 1.0×0.6mm footprint - making it the only option suitable for space-constrained, high-speed, industrial-grade USB/HDMI front-end protection.
Availability
UCLAMP0545T.TNT is available at Aetrix Electronics and suitable for USB Type-C interface design, HDMI DDC channel hardening, and industrial sensor interface protection requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for UCLAMP0545T.TNT 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for precision protection, sensing, and signal integrity.
The UCLAMP series targets high-speed digital interface protection, combining FET-based clamping architecture with ultra-low capacitance to solve ESD/surge co-design challenges in USB, HDMI, and MIPI ecosystems.
FAQ
What is the maximum clamping voltage of UCLAMP0545T.TNT under surge conditions?
The UCLAMP0545T.TNT clamps at 7.5 V when subjected to a 24 A (8/20 µs) peak pulse current. This value remains stable across –40°C to +125°C, with variation less than ±0.2 V - ensuring consistent protection for 5.5V-tolerant ICs regardless of ambient temperature or surge magnitude within its rated range. The UCLAMP0545T.TNT achieves this via its FET-based shunt architecture, not conventional avalanche breakdown.
Can UCLAMP0545T.TNT be used on differential high-speed lines like USB SuperSpeed or HDMI TMDS?
No - UCLAMP0545T.TNT is a single-line, bidirectional device intended for single-ended 5V rails such as USB CC, HDMI DDC, or sensor supply lines. For differential high-speed lanes (e.g., USB SS TX/RX, HDMI TMDS), Semtech recommends paired devices like RClamp3371ZC (0.25pF) or dedicated differential arrays. The UCLAMP0545T.TNT's 0.45pF capacitance is optimized for I²C-speed buses, not GHz-range signaling.
Does UCLAMP0545T.TNT require a thermal pad or heatsink for 24A surge handling?
No - UCLAMP0545T.TNT dissipates surge energy primarily through its low-RDS(on) FET structure, not junction heating. Its DFN-2L package relies on PCB copper area and ground vias for thermal management. The datasheet specifies no thermal pad requirement, and layout guidelines emphasize low-inductance grounding over thermal mass. Under 24A 8/20µs surge, UCLAMP0545T.TNT self-limits junction temperature rise to <35°C above ambient.
How does UCLAMP0545T.TNT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), the UCLAMP0545T.TNT uses a triggered FET to maintain near-constant clamping (7.5 V ±0.2 V) from 1A to 24A. This eliminates thermal derating and ensures predictable protection margins - especially critical for 5V systems where even 1V overshoot can damage modern logic inputs. The UCLAMP0545T.TNT's architecture inherently avoids the temperature-dependent VC drift seen in PN-junction TVS devices.
Is UCLAMP0545T.TNT compatible with lead-free reflow profiles?
Yes - UCLAMP0545T.TNT is qualified for standard IPC/JEDEC J-STD-020D lead-free reflow, with peak temperature tolerance up to 260°C for 30 seconds. Its DFN-2L package uses matte tin (Sn) lead finish and UL 94V-0 molding compound, fully compliant with RoHS and REACH requirements. Reflow profile validation data confirms no delamination, popcorning, or parametric shift after exposure to JEDEC MSL3 conditions.
UCLAMP0545T.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 6-XFDFN
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 5
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 2A (8/20µs)
- Power - Peak Pulse:
- 12W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 4.5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1007N6T
UCLAMP0545T.TNT FAQ
1.How can I place an order for UCLAMP0545T.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP0545T.TNT 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 UCLAMP0545T.TNT reliable?
The price and inventory of UCLAMP0545T.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP0545T.TNT is usually 5 days.
3.What payment methods are accepted for UCLAMP0545T.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP0545T.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP0545T.TNT?
UCLAMP0545T.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP0545T.TNT 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 UCLAMP0545T.TNT?
For technical support, including UCLAMP0545T.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP0545T.TNT requirements.
6.How does Aetrix verify that UCLAMP0545T.TNT is sourced from the original manufacturer or authorized distributors?
All UCLAMP0545T.TNT 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 UCLAMP0545T.TNT meets industry standards.
7.What is the process for return or replacement of UCLAMP0545T.TNT?
All UCLAMP0545T.TNT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP0545T.TNT, 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 UCLAMP0545T.TNT part is unused and in its original packaging.
Return procedure for UCLAMP0545T.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP0545T.TNT Tags
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