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Toshiba Semiconductor and Storage DF5A6.8LF,LF
- Part No.:
- DF5A6.8LF,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- SC-74A, SOT-753
- Datasheet:
-
DF5A6.8LF,LF.pdf
- Description:
- TVS DIODE 5VWM SMV
- Quantity:
- Payment:
- Shipping:
Inventory:8,871
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Product details
Overview
DF5A6.8LF from TOSHIBA is a quad-channel ESD protection diode array designed for high-speed data lines, featuring 6.8 V nominal Zener voltage (VZ = 6.5–7.1 V at IZ = 5 mA), low terminal capacitance (CT = 6.0 pF typ.), and ±8 kV IEC61000-4-2 contact discharge immunity. It integrates four cathode-anode channels in a compact SOT-353 (SC-88A) package for USB, HDMI, and audio interface protection.
For engineers reviewing the DF5A6.8LF datasheet, DF5A6.8LF pinout, DF5A6.8LF application, or DF5A6.8LF equivalent, key selection criteria include its 6.0 pF channel-to-channel capacitance, 6.8 V clamping voltage range, quad-cathode topology (pins 1/3/4/5 = cathodes, pin 2 = common anode), ±8 kV ESD rating, and suitability for high-frequency signal line protection without signal integrity degradation.
Technical Context
The DF5A6.8LF implements a monolithic quad Zener-based ESD clamp structure with a shared anode configuration. Each of the four cathode terminals connects to an individual 6.8 V Zener junction, enabling independent transient suppression on parallel signal paths while minimizing inter-channel coupling.
Its low 6.0 pF capacitance per channel (measured at VR = 0 V, f = 1 MHz) ensures minimal loading on high-speed interfaces up to 500 Mbps. The device operates within a −55°C to +125°C storage temperature range and is rated for 200 mW power dissipation at 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage VZ | 6.5–7.1 V at IZ = 5 mA: defines clamping threshold for ESD transients on protected lines |
| Terminal capacitance CT | 6.0 pF typ. at VR = 0 V, 1 MHz: enables use on USB 2.0 and audio differential pairs without signal distortion |
| ESD immunity | ±8 kV per IEC61000-4-2 contact discharge: meets industrial-grade system-level ESD requirements |
| Dynamic impedance ZZ | ≤50 Ω at IZ = 5 mA: ensures fast response and low clamping voltage overshoot during ESD events |
| Reverse leakage IR | ≤0.5 μA at VR = 5 V: prevents DC loading on bias-sensitive analog or reference lines |
| Power dissipation P | 200 mW at Ta = 25°C: supports short-duration ESD pulse energy absorption without thermal runaway |
Pinout & Package
DF5A6.8LF uses the SOT-353 (SC-88A) 5-pin surface-mount package, measuring 2.0 × 2.1 × 0.9 mm (L × W × H), with gull-wing leads and a moisture sensitivity level (MSL) of 1 per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CATHODE 1) | ESD clamp cathode | Connects to first protected signal line; sinks transient current to common anode |
| 2 (ANODE) | Common anode | Shared return path for all four Zener clamps; ties to system ground or low-impedance reference |
| 3 (CATHODE 2) | ESD clamp cathode | Connects to second protected signal line; electrically isolated from other cathodes |
| 4 (CATHODE 3) | ESD clamp cathode | Connects to third protected signal line; maintains <6.0 pF capacitance to ANODE |
| 5 (CATHODE 4) | ESD clamp cathode | Connects to fourth protected signal line; enables compact quad-line protection layout |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel monolithic integration | Four independent 6.8 V Zener clamps in one SOT-353 package reduces PCB area by >75% vs. discrete diodes |
| Low inter-channel capacitance | 6.0 pF typical between each cathode and common anode preserves signal integrity on high-speed differential pairs |
| IEC61000-4-2 certified immunity | ±8 kV contact discharge rating verified per standard test protocol-no derating required for system compliance |
| Low leakage performance | ≤0.5 μA reverse current at 5 V enables use on precision analog inputs without offset drift |
Applications
| USB 2.0 Data Lines | HDMI TMDS Channels |
|---|---|
Use Scenario: Protecting D+ and D− pins of USB 2.0 transceivers against human-body-model ESD events during plug/unplug cycles. IC Role / Device Role: Quad-channel ESD clamp providing bidirectional transient suppression on two differential pairs using shared anode grounding. Use Value: 6.0 pF capacitance per channel avoids signal rise-time degradation beyond USB 2.0's 1.5 ns spec, maintaining eye diagram integrity. | Use Scenario: Safeguarding three TMDS clock/data channels and the DDC/CEC bus in HDMI source/sink devices. IC Role / Device Role: Single-device solution for four high-speed serial links, leveraging pin 2 (ANODE) as common ground return for all clamps. Use Value: Enables full HDMI interface protection with one component instead of four discrete diodes-reducing BOM count and layout complexity. |
| Smartphone Audio Jacks | Industrial Sensor Interfaces |
Use Scenario: Shielding stereo headphone L/R and mic input traces from ESD during cable insertion in portable consumer devices. IC Role / Device Role: Low-capacitance Zener array clamping transients before they reach codec input amplifiers. Use Value: Sub-7 V clamping voltage prevents overvoltage damage to 3.3 V tolerant audio ICs while 6.0 pF avoids audible high-frequency attenuation. | Use Scenario: Protecting RS-485/RS-422 differential receivers connected to field wiring exposed to electrostatic discharge in factory environments. IC Role / Device Role: Four-channel transient suppressor placed at connector entry point, with cathodes tied to A/B/Y/Z lines and anode grounded. Use Value: ±8 kV IEC-rated immunity ensures robust operation in uncontrolled industrial settings without requiring additional TVS stages. |
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 ESD9X5.0ST5G | Single-channel 5.0 V Zener, 12 pF capacitance, SOT-523 package | Requires four separate placements; higher capacitance limits use to ≤100 Mbps interfaces | Select when lower clamping voltage (5.0 V) is prioritized over channel density and speed |
| Vishay VEML6030X01 | Not applicable - optical sensor IC, not ESD protection device | N/A - functionally incompatible | Exclude: VEML6030X01 is an ambient light sensor, not a protection diode |
Compared with DF5A6.8LF, ESD9X5.0ST5G offers lower clamping voltage but lacks integrated quad-channel topology and doubles board area; no valid alternative matches DF5A6.8LF's combination of 6.8 V clamping, 6.0 pF, and 4-channel SOT-353 integration-making it uniquely suited for space-constrained, high-speed interface protection.
Availability
DF5A6.8LF is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI TMDS channel safeguarding, and smartphone audio jack ESD hardening requiring stable component supply across production lifecycles.
Supply support for DF5A6.8LF 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, miniaturization, and application-specific optimization.
The DF5A6.8LF 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 are critical constraints.
FAQ
What is the primary circuit role of the DF5A6.8LF in a system design?
The DF5A6.8LF serves exclusively as an ESD protection device-providing transient voltage suppression on up to four signal lines via monolithically integrated 6.8 V Zener clamps. It is not rated for continuous voltage regulation or constant-current operation. Its circuit role is strictly defined as a fail-safe shunt element that activates only during electrostatic discharge events, diverting surge current from sensitive downstream ICs to ground through its common anode (pin 2). DF5A6.8LF must never be used as a general-purpose Zener diode.
Does the DF5A6.8LF support bidirectional ESD protection on each channel?
Yes, the DF5A6.8LF provides bidirectional ESD protection per channel due to its Zener-based structure: each cathode-anode junction conducts in reverse breakdown (clamping positive transients to ~6.8 V above ground) and forward-biases (~0.7 V drop) for negative transients. This dual-mode behavior enables protection against both contact-discharge polarities without external polarity configuration. DF5A6.8LF achieves this while maintaining 6.0 pF capacitance and ±8 kV IEC61000-4-2 compliance on all four channels simultaneously.
Can the DF5A6.8LF be used to protect analog sensor signals operating at 2.5 V?
Yes, the DF5A6.8LF is suitable for protecting 2.5 V analog sensor signals, provided the signal swing remains below the 6.8 V Zener threshold under normal operation. Its ≤0.5 μA reverse leakage at 5 V ensures negligible DC loading, and 6.0 pF capacitance avoids bandwidth reduction in sub-100 MHz sensor paths. However, DF5A6.8LF does not clamp below 6.5 V-so transient excursions exceeding that level will trigger conduction. For tighter clamping near 2.5 V rails, a dedicated low-voltage TVS is recommended; DF5A6.8LF is optimal where system-level ESD immunity is the priority over precise low-voltage limiting.
What is the thermal derating requirement for DF5A6.8LF in continuous operation?
The DF5A6.8LF is not intended for continuous power dissipation-it is rated for 200 mW only under short-duration ESD pulses (e.g., <100 ns). Toshiba explicitly states it is "for protection against electrostatic discharge only" and prohibits use as a constant-voltage diode. No thermal derating curve applies to steady-state conditions because DF5A6.8LF has no specified continuous power rating. Engineers must ensure DF5A6.8LF sees only transient stress; sustained voltage or current beyond datasheet test conditions (e.g., IZ = 5 mA) risks irreversible degradation. DF5A6.8LF reliability depends entirely on proper application within its ESD-only operational envelope.
Is the DF5A6.8LF RoHS compliant and lead-free?
Yes, the DF5A6.8LF is RoHS compliant and lead-free, as confirmed by Toshiba's environmental documentation and marking specifications. The "LF" suffix in the part number denotes lead-free termination, and the device meets EU RoHS Directive 2011/65/EU requirements for restricted substances. Solder reflow profiles must follow JEDEC J-STD-020 for MSL 1 components. DF5A6.8LF's 0.014 g typical weight and SOT-353 packaging are consistent with Toshiba's lead-free manufacturing standards, and no exemptions apply-full compliance is verified for commercial and industrial deployment.
DF5A6.8LF,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):
- 6.5V
- 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:
- SMV
DF5A6.8LF,LF FAQ
1.How can I place an order for DF5A6.8LF,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for DF5A6.8LF,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 DF5A6.8LF,LF reliable?
The price and inventory of DF5A6.8LF,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF5A6.8LF,LF is usually 5 days.
3.What payment methods are accepted for DF5A6.8LF,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF5A6.8LF,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF5A6.8LF,LF?
DF5A6.8LF,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF5A6.8LF,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 DF5A6.8LF,LF?
For technical support, including DF5A6.8LF,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF5A6.8LF,LF requirements.
6.How does Aetrix verify that DF5A6.8LF,LF is sourced from the original manufacturer or authorized distributors?
All DF5A6.8LF,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 DF5A6.8LF,LF meets industry standards.
7.What is the process for return or replacement of DF5A6.8LF,LF?
All DF5A6.8LF,LF units undergo pre-shipment inspection (PSI). If there is an issue with DF5A6.8LF,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 DF5A6.8LF,LF part is unused and in its original packaging.
Return procedure for DF5A6.8LF,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DF5A6.8LF,LF Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
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DESD5V0U1BA-7
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ESD5Z5.0T1G
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DESD5V0U1BB-7
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
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DF2S5M4CT,L3F
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D5V0L1B2WS-7
Diodes Incorporated
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