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Diodes Incorporated DDZ9689T-7
- Part No.:
- DDZ9689T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
DDZ9689T-7.pdf
- Description:
- DIODE ZENER 5.1V 150MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:22,388
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Product details
Overview
DDZ9689T-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 5.1 V, ±5% tolerance (4.85–5.36 V), 150 mW power dissipation, 50 µA maximum reverse leakage at 3 V, and SOD523 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for portable electronics and sensor interfaces.
For engineers reviewing the DDZ9689T-7 datasheet, DDZ9689T-7 pinout, DDZ9689T-7 application, or DDZ9689T-7 equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, low thermal resistance (833 °C/W), sharp breakdown knee, cathode-band polarity marking, and compatibility with automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its sharp breakdown characteristic ensures minimal voltage deviation across the specified 5–50 mA zener current range.
Designed for thermal equilibrium at 30°C, it delivers consistent regulation with temperature coefficient near zero for 5.1 V devices (per Fig. 16), and exhibits very low leakage (<50 µA at VR = 3 V) to minimize standby power loss in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V nominal, 4.85–5.36 V range at IZT = 5 mA - defines precision voltage reference point |
| Power Dissipation (PD) | 150 mW - limits continuous power handling on standard FR-4 PCB with recommended pad layout |
| Reverse Leakage (IR) | 50 µA max at VR = 3 V - ensures low quiescent current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 833 °C/W - indicates sensitivity to ambient temperature rise without heatsinking |
| Operating Temperature | −65 °C to +150 °C - supports industrial and automotive under-hood environments |
| Package | SOD523 - 1.2 mm × 0.8 mm footprint, compatible with 0402 placement equipment |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic case (0.55–0.65 mm height, 0.75–0.85 mm width, 1.15–1.25 mm length), matte tin–annealed terminals, cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; reverse-bias voltage applied between cathode and anode |
| Cathode | Zener breakdown terminal / regulated output node | Marked with band; supplies stable 5.1 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Sharp breakdown knee | Enables tight regulation with minimal current change across operating range (Fig. 3) |
| Low leakage current | ≤50 µA at 3 V reverse bias reduces standby power in always-on circuits |
| SOD523 package | 0.002 g weight and 1.2 × 0.8 mm footprint support high-density portable PCB layouts |
| Lead-free & halogen-free | Complies with RoHS 2 and "Green" standards (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Portable Power Monitoring | Microcontroller Voltage Reference |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage in wearables using ADC input with internal reference scaling. IC Role / Device Role / Timing Role: Zener diode provides stable 5.1 V reference for ADC voltage divider scaling. Use Value: Enables accurate 0–4.2 V battery measurement with ±1.5% full-scale error due to tight 5.1 V tolerance and low tempco. |
Use Scenario: Supplying precise bias to analog comparators in ultra-low-power MCU sleep modes. IC Role / Device Role / Timing Role: Acts as shunt regulator to generate clean 5.1 V reference from noisy 3.3 V LDO output. Use Value: Reduces comparator offset drift by 40% vs. resistor-divider reference, thanks to sharp knee and low leakage. |
| ESD-Sensitive Sensor Interface | USB-C Port Overvoltage Clamp |
Use Scenario: Protecting I²C lines of MEMS accelerometers from transient overvoltage during board handling. IC Role / Device Role / Timing Role: Low-capacitance Zener clamps line voltage to 5.1 V before ESD reaches IC pins. Use Value: Prevents latch-up in sensors rated for ≤5.5 V absolute max, leveraging fast response and 50 µA leakage. |
Use Scenario: Clamping VBUS detection circuitry in USB-C receptacles against 5.5 V surges. IC Role / Device Role / Timing Role: Shunt limiter that activates at 5.1 V to divert excess current away from monitoring IC. Use Value: Maintains system-level compliance with USB PD 3.0 VBUS tolerance (5.0–5.5 V) without adding series resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C5V1LT1G | Same 5.1 V nominal, but ±1% tolerance and higher 200 mW PD; SOD-523 package identical | Higher precision required in metrology-grade references; not needed for general biasing | Select when tighter voltage tolerance and higher surge capability are critical |
| MMSZ5222BT1G | 5.1 V nominal, ±5% tolerance, but SOD-123 package (larger footprint, 2× height); 500 mW PD | Used where board space allows larger package and higher power margin is preferred | Select when thermal margin >150 mW is required and SOD-123 placement is available |
Compared with BZX584C5V1LT1G and MMSZ5222BT1G, DDZ9689T-7 offers optimal balance of compact SOD523 size, industry-standard ±5% tolerance, and proven low-leakage performance-making it ideal for space-constrained, battery-sensitive designs where 150 mW dissipation suffices.
Availability
DDZ9689T-7 is available at Aetrix Electronics and suitable for portable power monitoring, microcontroller voltage reference, ESD-sensitive sensor interface, and USB-C port overvoltage clamp applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for DDZ9689T-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, consumer, and communications markets.
This device belongs to the DDZ96xxT Zener diode family, engineered for precision voltage regulation in miniaturized, automated SMT applications where low leakage, sharp breakdown, and green compliance are mandatory.
FAQ
What is the zener test current (IZT) for DDZ9689T-7?
The zener voltage is specified at IZT = 5 mA, per the Electrical Characteristics table in DS30553 Rev. 8–2. This test current ensures stable junction temperature and repeatable VZ measurement under thermal equilibrium conditions at 30°C.
Does DDZ9689T-7 have a defined zener impedance (ZZT) value?
Yes - typical zener impedance is 60 Ω at IZ = 5 mA for the 5.1 V variant (see Fig. 10). This low dynamic impedance ensures minimal output voltage variation under changing load currents in regulation applications.
Can DDZ9689T-7 be used in place of a 5.0 V Zener diode?
No - DDZ9689T-7 is specifically rated at 5.1 V nominal (4.85–5.36 V range). Substituting for a true 5.0 V part may cause reference drift beyond system tolerance; verify target voltage match using the exact VZ min/max values before replacement.
Is the SOD523 package compatible with standard 0402 pick-and-place equipment?
Yes - the SOD523 outline (1.25 mm × 0.85 mm) aligns with JEDEC-standard 0402 placement tooling. Diodes Incorporated confirms compatibility with automated assembly per J-STD-020D Level 1 moisture sensitivity and MIL-STD-202 solderability requirements.
DDZ9689T-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
DDZ9689T-7 FAQ
1.How can I place an order for DDZ9689T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9689T-7 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 DDZ9689T-7 reliable?
The price and inventory of DDZ9689T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9689T-7 is usually 5 days.
3.What payment methods are accepted for DDZ9689T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9689T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9689T-7?
DDZ9689T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9689T-7 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 DDZ9689T-7?
For technical support, including DDZ9689T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9689T-7 requirements.
6.How does Aetrix verify that DDZ9689T-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9689T-7 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 DDZ9689T-7 meets industry standards.
7.What is the process for return or replacement of DDZ9689T-7?
All DDZ9689T-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9689T-7, 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 DDZ9689T-7 part is unused and in its original packaging.
Return procedure for DDZ9689T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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