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Renesas NNCD6.8F-T1B-AT
- Part No.:
- NNCD6.8F-T1B-AT
- Manufacturer:
- Renesas
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
NNCD6.8F-T1B-AT.pdf
- Description:
- NNCD6.8F-T1B-AT - ELECTROSTATIC
- Quantity:
- Payment:
- Shipping:
Inventory:16,099
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Product details
Overview
NNCD6.8F-T1B-AT from Renesas Electronics is a dual-channel ESD noise clipping diode in SC-59 (EIAJ) 3-pin mini mold package, with breakdown voltage 6.47–7.14 V, dynamic impedance ≤30 Ω at 5 mA, reverse leakage ≤2 µA at 3.5 V, capacitance 110 pF at 1 MHz, and ESD endurance ≥30 kV per IEC 1000-4-2. It protects external interface circuits such as parallel printer ports and CD-ROM connectors.
For engineers reviewing the NNCD6.8F-T1B-AT datasheet, NNCD6.8F-T1B-AT pinout, NNCD6.8F-T1B-AT application, or NNCD6.8F-T1B-AT equivalent, key selection criteria include clamping voltage stability under 30 kV ESD pulses, low dynamic impedance for fast transient suppression, and dual-cathode common-anode topology for bidirectional signal line protection.
Technical Context
This device implements a double-type, anode-common ESD protection structure with two independent Zener-like clamping paths (A–K1 and A–K2), each rated for 200 mW total power dissipation and 100 W non-repetitive surge power at 10 µs pulse width. Its low 110 pF junction capacitance enables use on high-speed digital interfaces without signal integrity degradation.
The diode operates within –55 °C to +150 °C storage range and supports junction temperatures up to 150 °C. Its IEC 1000-4-2 compliance ensures validated 30 kV contact discharge immunity - critical for consumer electronics and peripheral interfaces exposed to human handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 6.47–7.14 V at 5 mA - defines precise clamping threshold for overvoltage transients on protected lines. |
| Dynamic Impedance | ≤30 Ω at 5 mA - ensures low-voltage overshoot during fast ESD events (e.g., IEC 1000-4-2). |
| Junction Capacitance | 110 pF at 1 MHz, VR = 0 V - minimizes loading on high-speed data lines like parallel printer or CD-ROM interfaces. |
| ESD Withstand | ≥30 kV per IEC 1000-4-2 - validated immunity to human-body-model electrostatic discharges. |
| Power Dissipation | 200 mW (total) - sets thermal limit for continuous operation in ambient temperatures up to 100 °C. |
| Surge Power Rating | 100 W at tT = 10 µs - supports single-pulse energy absorption without failure. |
Pinout & Package
Package: SC-59 (EIAJ) 3-pin mini mold, surface-mount, anode-common dual-diode configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode 1 (K1) | First clamping path cathode - connects to one protected signal line (e.g., DATA0). |
| 2 | Cathode 2 (K2) | Second clamping path cathode - connects to second protected signal line (e.g., STROBE). |
| 3 | Anode (A) | Common anode node - tied to ground or low-impedance return path for bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel ESD protection | Single SC-59 package integrates two independent clamping diodes sharing one anode - reduces PCB area vs. discrete solutions. |
| IEC 1000-4-2 certified | Validated 30 kV contact discharge endurance - meets industrial and consumer EMI immunity requirements out-of-box. |
| Low dynamic impedance | ≤30 Ω at 5 mA - limits voltage overshoot during nanosecond-scale ESD transients, protecting downstream IC inputs. |
| Stable capacitance | 110 pF at 1 MHz - predictable high-frequency loading enables reliable timing margin analysis on parallel bus interfaces. |
Applications
| Parallel Printer Interface Protection | CD-ROM Data Bus Clamping |
|---|---|
Use Scenario: Protects bidirectional 8-bit parallel data lines (DATA0–DATA7) and control signals (STROBE, ACK) between PC and dot-matrix/inkjet printers exposed to handling ESD. IC Role / Device Role / Timing Role: Anode-common dual diode clamps both positive and negative transients on each signal line to ground. Use Value: Prevents latch-up or input-stage damage in printer controller ICs by limiting transient voltage to ≤7.14 V with sub-30 Ω dynamic resistance. | Use Scenario: Shields ATAPI/IDE data bus lines (D0–D15) and control pins (IORDY, RESET) of internal CD-ROM drives during system assembly or maintenance. IC Role / Device Role / Timing Role: Provides low-capacitance (<110 pF), bidirectional clamping without degrading 16-bit burst transfer timing. Use Value: Maintains signal edge integrity while absorbing >30 kV ESD pulses - avoids data corruption or drive firmware lockup. |
| External Peripheral Connector Guard | Legacy Audio/Video I/O Surge Absorption |
Use Scenario: Mounted adjacent to D-sub or DB-25 connectors on industrial PCs or test equipment front panels subject to frequent cable insertion/removal. IC Role / Device Role / Timing Role: Dual-cathode layout allows protection of two independent signal pairs (e.g., TX/RX and RTS/CTS) with shared ground reference. Use Value: Eliminates need for separate TVS devices per line - cuts BOM count and routing complexity for multi-signal connectors. | Use Scenario: Clamps transient spikes on analog audio line inputs (L/R channels) and composite video outputs in set-top boxes or AV receivers. IC Role / Device Role / Timing Role: Functions as waveform clipper - suppresses overvoltage excursions beyond ±7.14 V without distorting baseband audio/video spectra. Use Value: Prevents audible pop/crackle and video sync loss caused by induced surges on unshielded RCA or phono cables. |
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 NSQA6V8A3T2G | Single-channel, 6.8 V clamping, SOT-23 package, 105 pF capacitance, 30 kV HBM rating. | Requires two devices for dual-line protection; lacks integrated common-anode topology. | Select when board space permits discrete placement and ground routing flexibility is available. |
| Vishay SMAJ6.8A | Single-directional TVS, 6.8 V standoff, DO-214AC package, 1500 W peak pulse power, 200 pF capacitance. | Unidirectional clamping only; higher capacitance limits use on >10 MHz signals. | Prefer for high-energy surge environments where ESD is secondary to lightning-induced transients. |
Compared with NSQA6V8A3T2G and SMAJ6.8A, the NNCD6.8F-T1B-AT delivers integrated dual-line protection in one SC-59 footprint with lower capacitance and guaranteed IEC 1000-4-2 30 kV performance - optimizing layout efficiency and interface signal fidelity for legacy parallel and ATA buses.
Availability
NNCD6.8F-T1B-AT is available at Aetrix Electronics and suitable for parallel printer interfaces, CD-ROM data buses, external peripheral connector protection, and legacy audio/video I/O requiring stable component supply across long-lifecycle industrial and consumer designs.
Supply support for NNCD6.8F-T1B-AT 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
Renesas Electronics Corporation is a global semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and interface solutions.
The NNCD6.8F-T1B-AT belongs to Renesas' ESD noise clipping diode family designed specifically for IEC 1000-4-2-compliant protection of external digital interfaces in standard-grade consumer and office equipment.
FAQ
What is the maximum operating junction temperature for NNCD6.8F-T1B-AT?
The NNCD6.8F-T1B-AT has a maximum junction temperature (Tj) rating of 150 °C, as specified in its absolute maximum ratings table. This allows reliable operation in high-ambient environments such as enclosed industrial enclosures or near heat-generating components. Derating curves in the datasheet confirm 200 mW total power dissipation is sustainable up to 100 °C ambient - ensuring thermal safety margins for NNCD6.8F-T1B-AT in typical PCB layouts with moderate copper pour.
Does NNCD6.8F-T1B-AT support bidirectional ESD protection?
Yes, the NNCD6.8F-T1B-AT provides bidirectional clamping via its anode-common dual-diode structure: cathodes K1 and K2 clamp positive transients to ground, while the forward conduction of each A–K path clamps negative transients. This architecture enables full protection of AC-coupled or bidirectional digital lines - a core design feature confirmed in the "PIN CONNECTION" and "APPLICATIONS" sections of the NNCD6.8F-T1B-AT datasheet.
What is the typical junction capacitance of NNCD6.8F-T1B-AT and why does it matter?
The NNCD6.8F-T1B-AT exhibits 110 pF typical junction capacitance at 1 MHz and 0 V bias. This low value minimizes capacitive loading on high-speed parallel interfaces (e.g., printer handshaking or CD-ROM data bursts), preserving signal rise/fall times and preventing timing violations. The datasheet explicitly lists this parameter in the "ELECTRICAL CHARACTERISTICS" table - confirming its relevance for NNCD6.8F-T1B-AT in bandwidth-sensitive applications.
Is NNCD6.8F-T1B-AT compliant with IEC 1000-4-2, and what does that mean for system design?
Yes, the NNCD6.8F-T1B-AT is rated for ≥30 kV contact discharge per IEC 1000-4-2 - a key electromagnetic compatibility requirement for end-user accessible ports. This certification means NNCD6.8F-T1B-AT can be deployed without additional external protection circuitry on interfaces like printer or CD-ROM connectors, simplifying design validation and reducing time-to-certification for CE/FCC-marked products.
Can NNCD6.8F-T1B-AT replace older NEC ESD diodes like NNCD6.8F without layout changes?
Yes, NNCD6.8F-T1B-AT uses the same SC-59 (EIAJ) 3-pin mini mold package and identical pinout (K1–K2–A) as the original NNCD6.8F, with identical electrical specifications including breakdown voltage, dynamic impedance, and capacitance. Renesas' documentation confirms backward compatibility - making NNCD6.8F-T1B-AT a direct drop-in replacement for NNCD6.8F in existing designs requiring no PCB or firmware modifications.
NNCD6.8F-T1B-AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.5V (Max)
- Voltage - Breakdown (Min):
- 6.47V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 110pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59
NNCD6.8F-T1B-AT FAQ
1.How can I place an order for NNCD6.8F-T1B-AT through Aetrix?
Please submit a Request for Quotation (RFQ) for NNCD6.8F-T1B-AT 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 NNCD6.8F-T1B-AT reliable?
The price and inventory of NNCD6.8F-T1B-AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NNCD6.8F-T1B-AT is usually 5 days.
3.What payment methods are accepted for NNCD6.8F-T1B-AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NNCD6.8F-T1B-AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NNCD6.8F-T1B-AT?
NNCD6.8F-T1B-AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NNCD6.8F-T1B-AT 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 NNCD6.8F-T1B-AT?
For technical support, including NNCD6.8F-T1B-AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NNCD6.8F-T1B-AT requirements.
6.How does Aetrix verify that NNCD6.8F-T1B-AT is sourced from the original manufacturer or authorized distributors?
All NNCD6.8F-T1B-AT 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 NNCD6.8F-T1B-AT meets industry standards.
7.What is the process for return or replacement of NNCD6.8F-T1B-AT?
All NNCD6.8F-T1B-AT units undergo pre-shipment inspection (PSI). If there is an issue with NNCD6.8F-T1B-AT, 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 NNCD6.8F-T1B-AT part is unused and in its original packaging.
Return procedure for NNCD6.8F-T1B-AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NNCD6.8F-T1B-AT Tags
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