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Toshiba Semiconductor and Storage DF5A6.8F,LF
- Part No.:
- DF5A6.8F,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- SC-74A, SOT-753
- Datasheet:
-
DF5A6.8F,LF.pdf
- Description:
- TVS DIODE 5VWM SMV
- Quantity:
- Payment:
- Shipping:
Inventory:5,478
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Product details
Overview
DF5A6.8F from TOSHIBA is a quad-channel ESD protection diode array designed for high-density I/O line protection in portable electronics. It features 6.8 V nominal Zener voltage (VZ = 6.4–7.2 V at IZ = 5 mA), ±30 kV IEC61000-4-2 contact discharge immunity, and ultra-low 45 pF typical terminal capacitance, enabling use on high-speed USB 2.0 and audio signal lines.
For engineers reviewing the DF5A6.8F datasheet, DF5A6.8F pinout, DF5A6.8F application, or DF5A6.8F equivalent, key selection criteria include its quad-cathode configuration (pins 1,3,4,5), low clamping voltage under ESD stress, guaranteed 30 kV ESD robustness, and suitability for space-constrained consumer interface protection where minimal signal distortion and board area reduction are critical.
Technical Context
The DF5A6.8F integrates four independent Zener-type ESD protection diodes in a single SOT-353 (SC-88A) package, each with anode tied to a common cathode node per channel. Its design targets transient suppression on unidirectional signal paths-such as USB D+/D−, headset mic/line, or SD card CMD/DAT lines-where low capacitance and fast response to sub-nanosecond ESD events are required.
Electrical behavior is defined by Zener breakdown at ~6.8 V, dynamic impedance ≤25 Ω at 5 mA, and knee impedance ≤30 Ω at 0.5 mA, ensuring effective clamping before downstream IC damage occurs. Reverse leakage remains ≤0.5 μA at 5 V, supporting low-power standby integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 6.4–7.2 V at IZ = 5 mA - defines precise clamping threshold for overvoltage transients on protected lines |
| ESD immunity | ±30 kV per IEC61000-4-2 contact discharge - exceeds industrial and consumer immunity requirements without external circuitry |
| Terminal capacitance (CT) | 45 pF typical at VR = 0 V, f = 1 MHz - enables use on 480 Mbps USB 2.0 data lines without signal integrity degradation |
| Dynamic impedance (ZZ) | ≤25 Ω at IZ = 5 mA - ensures low-voltage clamping during fast ESD pulses to protect sensitive CMOS inputs |
| Power dissipation (P) | 200 mW - supports short-duration ESD energy absorption without thermal runaway in SOT-353 footprint |
| Junction temperature (Tj) | 125 °C maximum - sets upper thermal limit for continuous operation in compact handheld enclosures |
Pinout & Package
SOT-353 (SC-88A) 5-pin surface-mount package: 1.0 mm × 1.25 mm × 0.9 mm body, 0.65 mm pitch, gull-wing leads. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode 1 | ESD clamp output for Channel 1 - connects to protected signal line (e.g., USB D+) |
| 2 | Anode | Common anode node - ties all four channels to system ground or reference plane |
| 3 | Cathode 2 | ESD clamp output for Channel 2 - dedicated path for second signal (e.g., USB D−) |
| 4 | Cathode 3 | ESD clamp output for Channel 3 - supports third I/O (e.g., headset microphone) |
| 5 | Cathode 4 | ESD clamp output for Channel 4 - isolates fourth signal (e.g., audio line out) with independent clamping |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel monolithic integration | Reduces PCB real estate by >75% vs. discrete diodes and cuts assembly cost via single placement step |
| Guaranteed ±30 kV ESD rating | Meets highest IEC61000-4-2 contact discharge level without derating or layout margin increase |
| 45 pF typical inter-electrode capacitance | Preserves rise/fall times on 480 Mbps USB 2.0 signals; avoids eye diagram closure or jitter accumulation |
| Low leakage (≤0.5 μA at 5 V) | Maintains battery life in always-on mobile interfaces and prevents false wake-up in sleep modes |
| 125 °C max junction temperature | Supports reliable operation in thermally dense smartphone/tablet designs with limited airflow |
Applications
| USB 2.0 Interface Protection | Smartphone Audio Jack Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pair in smartphone USB OTG ports against user-handling ESD events. IC Role / Device Role / Timing Role: Unidirectional Zener clamp per line, with common anode grounded to PCB chassis ground. Use Value: Prevents latch-up or gate oxide rupture in USB transceiver PHY while adding <0.1 mm² footprint per channel. | Use Scenario: Shielding 3-pole or 4-pole headset jack mic, left/right audio, and ground return paths from cable-induced ESD. IC Role / Device Role / Timing Role: Four independent clamps-one per conductor-each referenced to shared ground plane. Use Value: Eliminates need for five discrete diodes; maintains THD <0.01% at 20 kHz due to 45 pF CT. |
| SD Card Slot ESD Guard | Industrial HMI Button Line Protection |
Use Scenario: Safeguarding CMD, CLK, DAT0–DAT3, and CD/DAT lines of microSD slots in ruggedized tablets. IC Role / Device Role / Timing Role: Low-capacitance transient voltage suppressor placed directly at connector pins. Use Value: Enables full 25 MB/s SDHC transfer rates without signal reflection or timing skew from added capacitance. | Use Scenario: Protecting momentary tactile switch inputs on factory HMIs exposed to operator ESD in dry environments. IC Role / Device Role / Timing Role: Clamp-to-ground device absorbing ±30 kV discharges before reaching MCU GPIO input buffers. Use Value: Reduces firmware debounce time by eliminating post-ESD input glitches; extends switch contact life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NZQ6V8B | Single-channel SOD-523; 6.8 V VZ, 30 pF CT, ±30 kV ESD rating | Requires four separate placements; higher assembly cost and larger total footprint | Preferred when board layout allows discrete placement and thermal isolation per channel is needed |
| Vishay VEML6030X01 | Not applicable - optical sensor, not ESD protector | N/A | Excluded: misidentified part; no functional equivalence to DF5A6.8F |
Compared with NZQ6V8B, DF5A6.8F delivers identical clamping performance and ESD rating but reduces component count by 75%, saves >1.2 mm² PCB area, and guarantees matched channel characteristics across all four diodes-critical for differential signal integrity in USB and audio paths.
Availability
DF5A6.8F is available at Aetrix Electronics and suitable for USB 2.0 interface protection, smartphone audio jack safeguarding, and SD card slot ESD hardening requiring stable component supply and long-term lifecycle assurance.
Supply support for DF5A6.8F 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 for consumer, industrial, and automotive applications.
The DF5A6.8F belongs to Toshiba's ESD protection diode family optimized for ultra-compact, high-reliability I/O line shielding in portable electronics-prioritizing low capacitance, guaranteed ESD immunity, and multi-channel integration.
FAQ
What is the primary function of the DF5A6.8F?
The DF5A6.8F is a quad-channel ESD protection diode array engineered exclusively for electrostatic discharge suppression on signal lines. It is not rated for constant-voltage regulation or general-purpose Zener applications. Each channel clamps transients above ~6.8 V to ground via a common anode, and DF5A6.8F must be used only in accordance with Toshiba's stated ESD-only usage restriction.
Does the DF5A6.8F support bidirectional ESD protection?
No-the DF5A6.8F provides unidirectional clamping only, with cathodes active and anode tied to ground. It is intended for protecting signals referenced to ground, such as USB D+/D− or audio lines. For bidirectional protection (e.g., RS-485 or HDMI), a different device like the DF5A6.8F's complementary dual-rail variant would be required-not the DF5A6.8F itself.
What is the significance of the 45 pF terminal capacitance in DF5A6.8F?
The 45 pF typical capacitance between cathode and anode (measured at 0 V, 1 MHz) ensures minimal loading on high-speed digital signals. In practice, this allows DF5A6.8F to be placed directly on USB 2.0 data lines without degrading signal edge rates or causing bit errors-critical because DF5A6.8F is often deployed in space-constrained mobile designs where series inductance or RC filtering cannot be added.
Can DF5A6.8F replace a standard 6.8 V Zener diode in voltage regulation circuits?
No-Toshiba explicitly states that DF5A6.8F is "for protection against electrostatic discharge only" and "not intended for any other usage, including… constant voltage diode application." Its Zener voltage tolerance (6.4–7.2 V), dynamic impedance profile, and thermal limits are optimized for transient suppression-not steady-state regulation-and using DF5A6.8F outside ESD contexts violates its qualified operating conditions.
How does the DF5A6.8F achieve ±30 kV ESD immunity?
The DF5A6.8F achieves ±30 kV contact discharge immunity through monolithic silicon process tuning and optimized junction geometry, validated per IEC61000-4-2 test methodology. This rating reflects guaranteed no-damage performance under standardized ESD stress-meaning DF5A6.8F will not fail or degrade after repeated ±30 kV discharges, provided layout follows Toshiba's grounding and trace-length recommendations and DF5A6.8F is mounted within 3 mm of the protected connector.
DF5A6.8F,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- 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:
- 45pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMV
DF5A6.8F,LF FAQ
1.How can I place an order for DF5A6.8F,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for DF5A6.8F,LF 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 DF5A6.8F,LF reliable?
The price and inventory of DF5A6.8F,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF5A6.8F,LF is usually 5 days.
3.What payment methods are accepted for DF5A6.8F,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF5A6.8F,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF5A6.8F,LF?
DF5A6.8F,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF5A6.8F,LF 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 DF5A6.8F,LF?
For technical support, including DF5A6.8F,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF5A6.8F,LF requirements.
6.How does Aetrix verify that DF5A6.8F,LF is sourced from the original manufacturer or authorized distributors?
All DF5A6.8F,LF 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 DF5A6.8F,LF meets industry standards.
7.What is the process for return or replacement of DF5A6.8F,LF?
All DF5A6.8F,LF units undergo pre-shipment inspection (PSI). If there is an issue with DF5A6.8F,LF, 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 DF5A6.8F,LF part is unused and in its original packaging.
Return procedure for DF5A6.8F,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DF5A6.8F,LF Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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D12V0L1B2LP-7B
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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