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Semtech Corporation UCLAMP0554T.TNT
- Part No.:
- UCLAMP0554T.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 4-XFDFN Exposed Pad
- Datasheet:
-
UCLAMP0554T.TNT.pdf
- Description:
- TVS DIODE 5VWM 12.5VC SLP0808P4T
- Quantity:
- Payment:
- Shipping:
Inventory:14,375
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Product details
Overview
UCLAMP0554T.TNT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of 5V I/O or power lines in USB, industrial, and IoT 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 in a 1.6 × 1.6 mm DFN-6 package.
For engineers reviewing the UCLAMP0554T.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature, low capacitance (12 pF), ultra-low leakage (<100 nA), and compatibility with USB Type-C CC/SBU, HDMI, and industrial sensor bus protection.
Technical Context
UCLAMP0554T.TNT uses a surge-rated FET as its primary protection element, activated by an integrated precision trigger circuit that initiates conduction when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant over 0–24A peak pulse current due to decreasing RDS(on) under surge conditions.
The device features three input terminals (pins 4–6) and three ground terminals (pins 1–3) in a symmetric DFN-6 layout, enabling low-inductance PCB routing and uniform current sharing. Its 12 pF junction capacitance at VR = 5 V and 1 MHz ensures minimal signal distortion on high-speed data lines such as USB 2.0 and I²C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 5 V - Matches standard USB, HDMI, and industrial logic supply rails without derating. |
| Clamping Voltage (IPP = 24A) | 7.5 V - Keeps protected ICs (e.g., USB PD controllers, level shifters) safely below absolute maximum ratings during surge events. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - Eliminates need for secondary ESD stages in end-equipment compliance testing. |
| Junction Capacitance | 12 pF @ 5 V, 1 MHz - Preserves signal integrity on 480 Mbps USB 2.0 and multi-Mbps I²C/SPI buses. |
| Dynamic Resistance | 18 mΩ - Ensures minimal voltage rise under high-current transients (e.g., lightning-induced surges per IEC 61000-4-5). |
| Leakage Current | 80 nA @ 5 V - Prevents measurable loading on battery-powered sensor nodes and always-on wake-up circuits. |
| Operating Temperature | –40°C to +125°C - Supports deployment in automotive cabin modules, industrial PLC I/O, and outdoor IoT gateways. |
Pinout & Package
UCLAMP0554T.TNT is housed in a Pb-free, RoHS-compliant 1.6 mm × 1.6 mm × 0.55 mm DFN-6 package with exposed thermal pad (no internal thermal pad required). All six terminals are surface-mount; pins 1–3 are GND, pins 4–6 are IN - requiring direct connection to both sides for full 40A surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to solid ground plane via multiple vias for rated 40A surge handling. |
| 4, 5, 6 | IN | Protected line input; parallel connection enables current sharing and minimizes trace inductance in high-speed interface protection. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Enables flat clamping voltage vs. current curve - avoids voltage overshoot common in silicon avalanche TVS devices. |
| Ultra-low dynamic resistance | 18 mΩ ensures <0.5 V additional drop at 24A, critical for protecting 5V-tolerant microcontrollers and PHYs. |
| Low junction capacitance | 12 pF allows placement directly at connector without equalization or signal degradation on USB 2.0 or MIPI D-PHY lines. |
| Wide temperature stability | Clamping voltage varies <±0.2 V from –40°C to +125°C - eliminates thermal derating calculations in industrial designs. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns) - protects against fast repetitive bursts in motor drives and factory automation equipment. |
Applications
| USB Type-C CC/SBU Protection | HDMI DDC Line Protection |
|---|---|
Use Scenario: Protecting USB Type-C Configuration Channel (CC) and Sideband Use (SBU) pins from EOS during hot-plug and cable insertion. IC Role / Device Role / Timing Role: Primary EOS shunt clamp placed adjacent to Type-C receptacle, operating in parallel with uClamp2411ZA for 24V tolerance. Use Value: Maintains 7.5 V clamping at 24A while adding only 12 pF load - prevents false CC detection and preserves USB PD negotiation timing. |
Use Scenario: Shielding HDMI Display Data Channel (DDC) I²C bus (SCL/SDA) from ESD and system-level surges in AV receivers and monitors. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor between source and sink, positioned before level translators or buffer ICs. Use Value: 12 pF capacitance avoids I²C timing violations up to 400 kHz; ±30 kV ESD rating meets IEC 61000-4-2 Level 4 compliance without external filtering. |
| Industrial Sensor Bus Protection | IoT Gateway UART Protection |
Use Scenario: Safeguarding RS-485/RS-422 transceivers and analog sensor front-ends in factory floor equipment exposed to EFT and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential bus lines, referenced to local ground with low parasitic inductance layout. Use Value: 40A peak pulse rating (8/20 µs) and ±4 kV EFT withstand enable single-device protection per line - reducing BOM count and board area vs. dual-diode arrays. |
Use Scenario: Securing debug and configuration UART lines (TX/RX/CTS/RTS) on cellular/NB-IoT gateways deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Unidirectional clamp on each UART signal, placed at edge connector to intercept transients before MCU GPIOs. Use Value: 80 nA leakage at 5 V prevents battery drain in sleep mode; 125°C operation supports sealed enclosures with passive thermal buildup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-050 | Higher clamping voltage (12 V @ 24A), higher capacitance (25 pF), same DFN-6 footprint. | Less suitable for 5V high-speed buses; better for lower-frequency industrial I/O where margin >7 V is acceptable. | Select SP1003-050 only if system-level clamping budget allows ≥12 V and signal bandwidth <10 MHz. |
| TPD4E05U06DQAR | Lower ESD rating (±12 kV), lower peak current (4 A), quad-channel array in 1.6 × 1.6 mm QFN. | Designed for multi-line protection (e.g., USB 2.0 D+/D− + ID + VBUS); not rated for 40A surges. | Choose TPD4E05U06DQAR when protecting ≥2 lines simultaneously with shared ground and space-constrained layouts. |
Compared with SP1003-050 and TPD4E05U06DQAR, UCLAMP0554T.TNT uniquely combines 7.5 V clamping, 40A surge capability, and 12 pF capacitance - making it optimal for single-line, high-reliability 5V interface protection where voltage margin and signal fidelity are critical.
Availability
UCLAMP0554T.TNT is available at Aetrix Electronics and suitable for USB Type-C, HDMI DDC, and industrial sensor bus applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for UCLAMP0554T.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 sensing, protection, and connectivity.
UCLAMP0554T.TNT belongs to Semtech's uClamp® family of transient voltage suppressors, engineered specifically for low-capacitance, high-fidelity protection of high-speed digital interfaces in consumer, industrial, and automotive systems.
FAQ
What is the clamping voltage of UCLAMP0554T.TNT at 24A peak pulse current?
The clamping voltage of UCLAMP0554T.TNT is 7.5 V when subjected to a 24A peak pulse current (tp = 1.2/50 μs voltage / 8/20 μs current combination waveform, RS = 2 Ω). This value is guaranteed across –40°C to +125°C and enables robust protection of 5V-tolerant ICs without exceeding their absolute maximum ratings. UCLAMP0554T.TNT maintains this clamping performance due to its FET-based architecture and low dynamic resistance.
Does UCLAMP0554T.TNT require a thermal pad on the PCB?
No, UCLAMP0554T.TNT does not require an external thermal pad. Its energy dissipation occurs primarily through conduction via the six copper terminals (three GND and three IN), and the DFN-6 package is designed to handle 40A surge events without thermal derating. The datasheet explicitly states "no thermal pad is needed" - heat is transferred efficiently through the solder joints and PCB copper, especially when pins 1–3 and 4–6 are fully connected to respective planes.
Can UCLAMP0554T.TNT be used on bidirectional data lines like I²C or USB 2.0 D+ and D−?
Yes, UCLAMP0554T.TNT is inherently bidirectional and suitable for I²C, USB 2.0, and other low-voltage differential or single-ended data lines. Its symmetrical structure (GND–IN configuration) and 12 pF capacitance preserve signal rise/fall times up to 480 Mbps. For USB 2.0, it is typically deployed per-line (D+ or D−) near the connector, and UCLAMP0554T.TNT's low leakage (<100 nA) prevents bus contention during idle states.
How does UCLAMP0554T.TNT differ from standard TVS diodes in surge response?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), UCLAMP0554T.TNT uses a triggered FET that achieves near-constant clamping (7.5 V from 1A to 24A) due to decreasing RDS(on) under surge. This eliminates voltage overshoot risks during high-current transients and provides stable protection across temperature - a key advantage confirmed in Semtech's comparative clamping curves versus conventional TVS devices.
Is UCLAMP0554T.TNT compatible with lead-free reflow profiles?
Yes, UCLAMP0554T.TNT is qualified for standard lead-free reflow soldering per JEDEC J-STD-020. Its DFN-6 package uses lead-free terminal finish and complies with RoHS and WEEE directives. The maximum peak temperature (260°C) and time above liquidus (60–150 seconds) are fully supported, and the device's UL 94V-0 molding compound ensures reliability under repeated thermal cycling encountered in automated SMT assembly.
UCLAMP0554T.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 4-XFDFN Exposed Pad
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 2A (8/20µs)
- Power - Peak Pulse:
- 25W
- 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:
- SLP0808P4T
UCLAMP0554T.TNT FAQ
1.How can I place an order for UCLAMP0554T.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP0554T.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 UCLAMP0554T.TNT reliable?
The price and inventory of UCLAMP0554T.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP0554T.TNT is usually 5 days.
3.What payment methods are accepted for UCLAMP0554T.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP0554T.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP0554T.TNT?
UCLAMP0554T.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP0554T.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 UCLAMP0554T.TNT?
For technical support, including UCLAMP0554T.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP0554T.TNT requirements.
6.How does Aetrix verify that UCLAMP0554T.TNT is sourced from the original manufacturer or authorized distributors?
All UCLAMP0554T.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 UCLAMP0554T.TNT meets industry standards.
7.What is the process for return or replacement of UCLAMP0554T.TNT?
All UCLAMP0554T.TNT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP0554T.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 UCLAMP0554T.TNT part is unused and in its original packaging.
Return procedure for UCLAMP0554T.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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