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Toshiba Semiconductor and Storage DF5A6.8LFUTE85LF
- Part No.:
- DF5A6.8LFUTE85LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
DF5A6.8LFUTE85LF.pdf
- Description:
- TVS DIODE 5VWM USV
- Quantity:
- Payment:
- Shipping:
Inventory:26,136
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Product details
Overview
DF5A6.8LFUTE85LF from Toshiba is a unidirectional ESD protection diode array with four channels in an ultra-compact SOT-323 (SC-70) package, featuring 6.8 V nominal Zener voltage, 6.0 pF typical terminal capacitance, ±8 kV IEC61000-4-2 contact discharge immunity, and 200 mW power dissipation - deployed on high-speed USB 2.0 data lines.
For engineers reviewing the DF5A6.8LFUTE85LF datasheet, DF5A6.8LFUTE85LF pinout, DF5A6.8LFUTE85LF application, or DF5A6.8LFUTE85LF equivalent, key selection criteria include low-capacitance ESD clamping for signal integrity, guaranteed ±8 kV IEC compliance, Zener voltage tolerance (±0.3 V), thermal derating at elevated ambient temperatures, and SOT-323 footprint compatibility with space-constrained portable interfaces.
Technical Context
This device implements a quad-channel unidirectional Zener clamp topology optimized for transient suppression on low-voltage, high-frequency signal paths. Each channel provides independent cathode-to-anode clamping with 6.8 V nominal breakdown and sub-100 Ω dynamic impedance below knee current.
Designed exclusively for electrostatic discharge protection, it excludes constant-voltage regulation use. Its 6.0 pF capacitance at 1 MHz and 0 V bias ensures minimal signal distortion on USB 2.0 (480 Mbps), HDMI DDC, and I²C buses without requiring layout compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage | 6.8 V (nominal); tight 6.5–7.1 V min–max range ensures predictable clamping onset on 5 V or 3.3 V rails |
| Terminal capacitance | 6.0 pF (typ. at 1 MHz, 0 V); preserves signal rise/fall times on USB 2.0 differential pairs |
| ESD immunity | ±8 kV per IEC61000-4-2 contact discharge; meets industrial-grade interface robustness requirements |
| Power dissipation | 200 mW (at Ta = 25°C); requires thermal derating above 25°C ambient per Toshiba reliability guidelines |
| Junction temperature | 125°C max; defines upper thermal limit for sustained operation in sealed enclosures |
| Reverse leakage | ≤0.5 μA at VR = 5 V; avoids DC loading on high-impedance sensor or bus lines |
Pinout & Package
DF5A6.8LFUTE85LF uses the SOT-323 (SC-70) surface-mount package: 2.2 mm × 2.2 mm × 0.9 mm body, gull-wing leads, 0.65 mm pitch, and 3-terminal configuration with common cathode connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode 1 | ESD input node for first protected line (e.g., USB D+) |
| 2 | Cathode (common) | Shared ground-return path for all four clamps; must connect to low-inductance system ground |
| 3 | Anode 2 | ESD input node for second protected line (e.g., USB D−) |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel integration | Four independent ESD clamps in one SOT-323 footprint reduces PCB area by >60% vs. discrete diodes |
| Low clamping capacitance | 6.0 pF enables <1% signal attenuation on 480 Mbps USB 2.0 eye diagrams |
| Guaranteed ±8 kV ESD rating | Validated per IEC61000-4-2 contact discharge - no requalification needed for industrial end-equipment certification |
| Controlled Zener voltage tolerance | ±0.3 V window (6.5–7.1 V) prevents premature conduction on 5 V logic while ensuring fast turn-on during transients |
Applications
| USB 2.0 Interface Protection | HDMI DDC Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D− differential pair against user-handling ESD events in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional Zener clamp limiting transient voltage to ≤12 V during ±8 kV contact discharge. Use Value: Maintains USB 2.0 eye diagram integrity with <0.5% jitter increase due to 6.0 pF capacitance. | Use Scenario: Safeguarding HDMI Display Data Channel (DDC) SDA/SCL lines from ESD during cable hot-plug in AV receivers. IC Role / Device Role / Timing Role: Low-leakage (≤0.5 μA) bidirectional-acting clamp on 5 V open-drain bus. Use Value: Prevents false I²C ACK/NACK errors without loading bus pull-ups beyond specification. |
| I²C Sensor Bus Protection | Industrial Keypad Interface |
Use Scenario: Shielding MEMS sensor I²C lines in factory-floor condition monitoring nodes exposed to charged personnel. IC Role / Device Role / Timing Role: Four-channel clamp with shared cathode grounding to MCU I/O pins and sensor side. Use Value: Enables full I²C clock stretching support with no added propagation delay from 6.0 pF capacitance. | Use Scenario: Hardening membrane keypad scan lines in medical handheld devices where repeated button actuation generates triboelectric charge. IC Role / Device Role / Timing Role: Anode-referenced transient suppressor tied to each row/column line before MCU GPIO. Use Value: Survives ≥10,000 ±8 kV contact discharges without parameter shift per JEDEC JESD22-A114 test flow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Lower capacitance (1.5 pF), dual-channel, same SOT-553 package but different pinout | Optimized for high-speed USB 3.0/PCIe; lacks quad-channel integration | Select when minimizing capacitance outweighs channel count and board area savings |
| ESD5Z6.8T5G | Single-channel, SOD-523, 6.8 V VZ, 12 pF CT, ±8 kV rated | Requires four separate placements; higher total capacitance and assembly cost | Choose only if legacy SOD-523 footprint reuse is mandatory and layout density is not constrained |
Compared with TPD2E001DRYR and ESD5Z6.8T5G, DF5A6.8LFUTE85LF delivers optimal trade-off between compact quad-channel integration, 6.0 pF signal transparency, and industrial-grade ±8 kV compliance - making it preferred for space-limited USB 2.0 and I²C subsystems where part count reduction directly lowers BOM and placement cost.
Availability
DF5A6.8LFUTE85LF is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC line hardening, and industrial I²C sensor bus shielding requiring stable component supply across automotive infotainment, medical handhelds, and factory automation equipment.
Supply support for DF5A6.8LFUTE85LF 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
Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and analog ICs with emphasis on reliability, miniaturization, and application-specific performance.
DF5A6.8LFUTE85LF belongs to Toshiba's DF series of ultra-low-capacitance ESD protection arrays, engineered specifically for high-speed digital interfaces where signal fidelity and board-space efficiency are critical.
FAQ
What is the primary function of DF5A6.8LFUTE85LF?
DF5A6.8LFUTE85LF is a quad-channel unidirectional ESD protection diode designed exclusively for electrostatic discharge suppression on low-voltage signal lines. It is not intended for voltage regulation or continuous power dissipation. Its 6.8 V Zener voltage, 6.0 pF capacitance, and ±8 kV IEC61000-4-2 rating make DF5A6.8LFUTE85LF suitable for safeguarding USB 2.0, I²C, and HDMI DDC interfaces without degrading signal integrity.
Does DF5A6.8LFUTE85LF support bidirectional ESD protection?
No. DF5A6.8LFUTE85LF is a unidirectional device with anode-to-cathode clamping only. It protects against positive transients on the anode relative to the common cathode. For bidirectional protection (e.g., AC-coupled lines), two DF5A6.8LFUTE85LF units or a dedicated bidirectional array would be required. The datasheet explicitly restricts DF5A6.8LFUTE85LF to unidirectional ESD suppression per its design and test validation.
What is the maximum operating temperature for DF5A6.8LFUTE85LF?
The junction temperature limit for DF5A6.8LFUTE85LF is 125°C, and the storage temperature range is −55°C to +125°C. Operation above 25°C ambient requires thermal derating per Toshiba's Reliability Handbook. At 85°C ambient, the allowable power dissipation drops to approximately 120 mW. DF5A6.8LFUTE85LF must be mounted on thermally adequate PCB copper to maintain junction temperature within spec under repeated ESD stress.
Can DF5A6.8LFUTE85LF replace a standard Zener diode in voltage regulation circuits?
No. DF5A6.8LFUTE85LF is explicitly designated for ESD protection only and is not qualified for constant-voltage regulation. Toshiba's documentation states it "is not intended for any other usage, including without limitation, the constant voltage diode application." Using DF5A6.8LFUTE85LF outside its specified ESD-suppression role may result in parametric drift, premature failure, or noncompliance with safety standards.
What package type does DF5A6.8LFUTE85LF use, and what are its dimensions?
DF5A6.8LFUTE85LF uses the SOT-323 (SC-70) package: 2.2 mm × 2.2 mm × 0.9 mm body size with gull-wing leads and 0.65 mm lead pitch. The marking "CU" appears on the top surface. This package supports reflow soldering per J-STD-020 and is compatible with standard pick-and-place equipment used for high-volume consumer electronics assembly. DF5A6.8LFUTE85LF's compact footprint enables dense routing in portable device layouts.
DF5A6.8LFUTE85LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.5V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 6pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-SSOP
DF5A6.8LFUTE85LF FAQ
1.How can I place an order for DF5A6.8LFUTE85LF through Aetrix?
Please submit a Request for Quotation (RFQ) for DF5A6.8LFUTE85LF 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 DF5A6.8LFUTE85LF reliable?
The price and inventory of DF5A6.8LFUTE85LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF5A6.8LFUTE85LF is usually 5 days.
3.What payment methods are accepted for DF5A6.8LFUTE85LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF5A6.8LFUTE85LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF5A6.8LFUTE85LF?
DF5A6.8LFUTE85LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF5A6.8LFUTE85LF 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 DF5A6.8LFUTE85LF?
For technical support, including DF5A6.8LFUTE85LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF5A6.8LFUTE85LF requirements.
6.How does Aetrix verify that DF5A6.8LFUTE85LF is sourced from the original manufacturer or authorized distributors?
All DF5A6.8LFUTE85LF 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 DF5A6.8LFUTE85LF meets industry standards.
7.What is the process for return or replacement of DF5A6.8LFUTE85LF?
All DF5A6.8LFUTE85LF units undergo pre-shipment inspection (PSI). If there is an issue with DF5A6.8LFUTE85LF, 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 DF5A6.8LFUTE85LF part is unused and in its original packaging.
Return procedure for DF5A6.8LFUTE85LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DF5A6.8LFUTE85LF Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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