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Toshiba Semiconductor and Storage DF2S6.8CT,L3F
- Part No.:
- DF2S6.8CT,L3F
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- SOD-882
- Datasheet:
-
DF2S6.8CT,L3F.pdf
- Description:
- TVS DIODE CST2
- Quantity:
- Payment:
- Shipping:
Inventory:9,426
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Product details
Overview
DF2S6.8CT from Toshiba is an ESD protection diode designed for high-reliability transient suppression in signal lines, featuring ±30 kV IEC61000-4-2 contact discharge rating, 6.8 V nominal Zener voltage (VZ), 25 pF typical capacitance at 0 V, 30 Ω max dynamic impedance, and CST2 surface-mount package. It serves as a unidirectional clamping device in USB, HDMI, and audio interface circuits.
For engineers reviewing the DF2S6.8CT datasheet, DF2S6.8CT pinout, DF2S6.8CT application, or DF2S6.8CT equivalent, key selection criteria include clamping voltage under 12 V at 1 A, low capacitance for high-speed data integrity, thermal stability up to 150 °C junction temperature, and compatibility with automated SMT assembly on fine-pitch land patterns.
Technical Context
The DF2S6.8CT employs a silicon epitaxial planar structure optimized for fast response to electrostatic transients. Its unidirectional configuration uses a single Zener junction with cathode-anode polarity, enabling precise clamping without reverse leakage degradation above 5 V working voltage.
Designed exclusively for ESD protection-not voltage regulation-the device operates within a -55 °C to +150 °C storage range and requires derating per Toshiba's Reliability Handbook when exposed to sustained thermal or electrical stress. Its 0.7 mg mass and CST2 footprint support miniaturized portable electronics layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Zener Voltage) | 6.8 V nominal at IZ = 5 mA - sets precise clamping threshold for 5 V logic interfaces |
| VC (Clamp Voltage) | <12 V at IPP = 1 A - ensures downstream ICs remain below absolute maximum ratings during ESD events |
| Ct (Capacitance) | 25 pF typical at 0 V, 1 MHz - preserves signal integrity in USB 2.0 and audio paths without bandwidth loss |
| ZZ (Dynamic Impedance) | ≤30 Ω - minimizes voltage overshoot during fast-rising ESD pulses (0.7–1 ns rise time) |
| VESD | ±30 kV per IEC61000-4-2 contact discharge - exceeds industrial immunity requirements |
| Tj (Junction Temp) | 150 °C max - supports operation in thermally constrained handheld enclosures |
Pinout & Package
DF2S6.8CT is housed in the CST2 package (Toshiba designation: 1-1P1S), a 2-pin ultra-small surface-mount case measuring 1.0 × 0.6 × 0.35 mm with 0.5 mm pitch. The package is optimized for high-density PCB layouts and reflow-compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Clamp output / Anode of Zener junction | Connected to protected signal line; sinks ESD current to ground path via external layout |
| 2 (Anode) | Reference terminal / Cathode of Zener junction | Typically tied to system ground; establishes clamping reference and enables unidirectional conduction |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-2 ESD Rating | ±30 kV contact discharge - eliminates need for secondary protection stages in consumer port designs |
| Low Capacitance | 25 pF typical - avoids signal distortion in 480 Mbps USB 2.0 differential pairs |
| Fast Response Time | <1 ns turn-on - clamps transients before sensitive PHY circuitry registers overvoltage |
| Thermal Robustness | 150 °C max junction temperature - sustains reliability in sealed battery-powered devices |
Applications
| USB 2.0 Data Lines | HDMI Hot-Plug Detection |
|---|---|
Use Scenario: Protecting D+ and D− pins of USB controllers against user-handling ESD in smartphones and peripherals. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between connector and PHY, referenced to local ground plane. Use Value: Prevents latch-up or gate oxide damage in USB transceivers while maintaining <100 ps timing skew across differential pair. | Use Scenario: Safeguarding HPD (Hot-Plug Detect) line in HDMI source devices during cable insertion/removal. IC Role / Device Role / Timing Role: Standoff protection element shunting ESD energy away from 5 V-tolerant CMOS input buffer. Use Value: Ensures reliable plug detection without false triggers or input damage, even after repeated ±8 kV air discharge exposure. |
| Audio Jack Interfaces | Industrial Sensor Signal Conditioning |
Use Scenario: Shielding 3.5 mm TRRS microphone and headset lines in tablets and wearables from human-body-model discharges. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp on analog audio paths, minimizing SNR degradation. Use Value: Maintains >95 dB SNR in 20 Hz–20 kHz band while surviving ≥10,000 ESD strikes per pin. | Use Scenario: Protecting 4–20 mA current-loop sensor inputs in factory automation modules exposed to maintenance personnel ESD. IC Role / Device Role / Timing Role: Primary transient suppressor on analog input front-end, placed before precision op-amp buffer. Use Value: Preserves 16-bit ADC accuracy by limiting input overvoltage to <15 V during ±30 kV contact events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Bi-directional configuration; 15 pF typical capacitance; lower 10 V VC at 1 A | Better suited for bidirectional data lines (e.g., I²C); not pin-compatible due to different pin 1/anode assignment | Select when protecting symmetric buses requiring equal positive/negative clamping |
| ESD9X5.0ST5G | Same unidirectional topology; 6.5–7.5 V VZ range; 12 pF capacitance; SOD-923 package | Smaller 0.8 × 0.6 mm footprint but higher thermal resistance; requires tighter layout control for 150 °C Tj | Choose for space-constrained designs where 12 pF capacitance allows higher-speed interfaces |
Compared with DF2S6.8CT, TPD2E001DRYR offers lower capacitance and bidirectional capability but demands board-level redesign, while ESD9X5.0ST5G reduces board area at the cost of thermal margin and requires validation of solder joint reliability under thermal cycling.
Availability
DF2S6.8CT is available at Aetrix Electronics and suitable for USB interface protection, HDMI hot-plug circuits, audio jack ESD hardening, and industrial 4–20 mA sensor inputs requiring stable component supply across long-life production programs.
Supply support for DF2S6.8CT 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 logic ICs with emphasis on reliability, efficiency, and miniaturization for global electronics markets.
The DF2S6.8CT belongs to Toshiba's DF2S series of ultra-compact ESD suppressors, engineered specifically for high-speed digital and analog signal line protection in portable and industrial equipment where size, capacitance, and ESD robustness are critical.
FAQ
What is the primary function of the DF2S6.8CT?
The DF2S6.8CT is a unidirectional ESD protection diode designed solely to suppress electrostatic discharge transients on signal lines. It clamps voltage spikes using a Zener junction, with a nominal 6.8 V breakdown voltage and ±30 kV IEC61000-4-2 contact rating. The DF2S6.8CT is not intended for voltage regulation, surge suppression beyond ESD, or continuous power dissipation.
Does the DF2S6.8CT support bidirectional signal lines like USB D+ and D−?
No - the DF2S6.8CT is unidirectional and must be used with correct polarity: pin 1 (cathode) connects to the protected signal line, and pin 2 (anode) connects to ground. For true bidirectional protection on differential pairs, two DF2S6.8CT devices may be placed back-to-back, but dedicated bi-directional alternatives such as TPD2E001DRYR are recommended instead. The DF2S6.8CT itself does not conduct in both directions.
What is the maximum clamping voltage of the DF2S6.8CT under ESD stress?
The DF2S6.8CT achieves a clamping voltage (VC) of less than 12 V when subjected to a 1 A peak pulse current, as defined in IEC61000-4-2 testing conditions. This value ensures downstream components-such as USB PHYs or HDMI receivers-remain within their absolute maximum input voltage limits during ESD events. The DF2S6.8CT's 30 Ω dynamic impedance contributes directly to this controlled voltage rise.
Can the DF2S6.8CT be used in automotive applications?
The DF2S6.8CT is not qualified to AEC-Q200 or automotive-grade reliability standards. While its 150 °C junction temperature rating permits operation in warm environments, Toshiba explicitly restricts its use in safety-critical systems-including automotive ECUs, ADAS sensors, or infotainment head units-due to lack of automotive qualification and absence of guaranteed failure-rate data. The DF2S6.8CT is intended for commercial and industrial portable electronics only.
What package type does the DF2S6.8CT use, and what are its dimensions?
The DF2S6.8CT uses the CST2 package (Toshiba designation: 1-1P1S), a 2-pin surface-mount device measuring 1.0 mm × 0.6 mm × 0.35 mm with 0.5 mm lead pitch. Its ultra-compact size and 0.7 mg typical weight enable high-density routing on space-limited PCBs. Land pattern dimensions are provided in Toshiba's datasheet revision 4.0.A for accurate stencil and placement setup.
DF2S6.8CT,L3F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package/Case:
- SOD-882
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 25pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- CST2
DF2S6.8CT,L3F FAQ
1.How can I place an order for DF2S6.8CT,L3F through Aetrix?
Please submit a Request for Quotation (RFQ) for DF2S6.8CT,L3F 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 DF2S6.8CT,L3F reliable?
The price and inventory of DF2S6.8CT,L3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF2S6.8CT,L3F is usually 5 days.
3.What payment methods are accepted for DF2S6.8CT,L3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF2S6.8CT,L3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF2S6.8CT,L3F?
DF2S6.8CT,L3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF2S6.8CT,L3F 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 DF2S6.8CT,L3F?
For technical support, including DF2S6.8CT,L3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF2S6.8CT,L3F requirements.
6.How does Aetrix verify that DF2S6.8CT,L3F is sourced from the original manufacturer or authorized distributors?
All DF2S6.8CT,L3F 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 DF2S6.8CT,L3F meets industry standards.
7.What is the process for return or replacement of DF2S6.8CT,L3F?
All DF2S6.8CT,L3F units undergo pre-shipment inspection (PSI). If there is an issue with DF2S6.8CT,L3F, 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 DF2S6.8CT,L3F part is unused and in its original packaging.
Return procedure for DF2S6.8CT,L3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DF2S6.8CT,L3F Tags
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