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Diodes Incorporated DDZ9689-7
- Part No.:
- DDZ9689-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9689-7.pdf
- Description:
- DIODE ZENER 5.1V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:15,288
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Product details
Overview
DDZ9689-7 from Diodes Incorporated is a surface-mount low-current Zener diode with nominal zener voltage 5.1 V (min 4.85 V, max 5.36 V), rated for 500 mW power dissipation on FR-4 PCB at TL = +75°C, specified at low test current of 50 µA, and housed in SOD123 package. It serves as precision voltage reference or overvoltage clamp in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the DDZ9689-7 datasheet, DDZ9689-7 pinout, DDZ9689-7 application, or DDZ9689-7 equivalent, key selection criteria include zener voltage tolerance (±5%), reverse leakage current (5 µA @ VR = 3 V), thermal resistance (RθJA = 340 °C/W), and SOD123 mechanical compatibility with automated pick-and-place assembly.
Technical Context
This device operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its low 50 µA test current enables ultra-low-power biasing in energy-constrained circuits, while the 5.1 V nominal zener point targets logic-level rail regulation and ADC reference stabilization.
The SOD123 package provides defined thermal path characteristics (RθJL = 150 °C/W) and moisture sensitivity level 1 compliance, supporting reflow soldering without preconditioning. Zener impedance is optimized for <10 Ω at IZT = 50 µA, ensuring minimal dynamic deviation during transient load events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 5.1 V - Stable reference point for 5 V logic rail monitoring or clamping |
| Zener Voltage Range | 4.85 V to 5.36 V - ±5% tolerance ensures predictable trip point in protection circuits |
| Test Current (IZT) | 50 µA - Enables operation from microampere-bias sources like high-impedance dividers |
| Max Reverse Leakage | 5 µA @ VR = 3 V - Low standby current preserves battery life in always-on sensing stages |
| Power Dissipation | 500 mW - Supports short-duration surge clamping without derating below +75°C board temp |
| Thermal Resistance (RθJA) | 340 °C/W - Requires minimum pad layout per Diodes Inc. Suggested Pad Layout for safe operation |
| Package | SOD123 - Standardized footprint compatible with IPC-7351B Class B land pattern |
Pinout & Package
DDZ9689-7 uses a two-terminal SOD123 surface-mount package with cathode band marking. The device has no active pins-only anode and cathode terminals identified by physical polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Breakdown voltage reference node | Connected to regulated rail or voltage monitor input; reverse-biased during normal operation |
| Anode | Reference ground return | Tied to system ground or lower-potential node; completes zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | 50 µA IZT enables use with high-impedance bias networks in IoT sensor front-ends |
| Automated assembly compatibility | SOD123 case meets JEDEC standard for pick-and-place reliability and solder joint consistency |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; no intentionally added lead, halogen, or antimony |
| Thermal stability | Temperature coefficient near zero crossing (~0.02 %/°C at 5.1 V) minimizes drift over -65°C to +150°C range |
Applications
| Portable Battery Monitor | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in wearable health trackers with 3.3 V MCU supply. IC Role / Device Role / Timing Role: Zener diode acts as analog voltage threshold detector feeding comparator input. Use Value: 5.1 V rating allows direct comparison against scaled-down battery voltage, enabling accurate low-battery warning at 3.6 V cell level. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU during power-up and brownout. IC Role / Device Role / Timing Role: Provides stable 5.1 V reference to RC-based reset generator IC (e.g., MAX809). Use Value: Tight 4.85–5.36 V tolerance ensures reset assertion remains within spec across temperature and unit-to-unit variation. |
| Industrial Sensor Signal Conditioning | USB-C Power Negotiation Clamp |
Use Scenario: Protecting 24-bit sigma-delta ADC inputs in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Clamps ESD-induced transients on analog input traces before reaching precision op-amp stage. Use Value: 500 mW peak power handling absorbs 2 kV HBM ESD pulses without degradation, preserving measurement integrity. |
Use Scenario: Limiting CC line voltage during USB-C PD negotiation in portable docking stations. IC Role / Device Role / Timing Role: Shunts excess voltage on Configuration Channel line to prevent controller latch-up. Use Value: Low 5 µA leakage at 3 V ensures negligible impact on PD communication timing and voltage thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V1-7-F | Same 5.1 V nominal, but higher IZT = 5 mA; RθJA = 375 °C/W; SOT-23 package | Higher test current demands stronger bias source; SOT-23 requires different land pattern and stencil | Select when higher power margin or existing SOT-23 footprint is preferred over SOD123 |
| MMSZ5231B-7-F | 5.1 V nominal, IZT = 20 mA; tighter voltage tolerance (±5%); RθJA = 350 °C/W; SOD-123 same | Higher test current reduces zener impedance but increases quiescent power draw | Prefer where lower dynamic impedance (<7 Ω) is critical and 20 mA bias is available |
Compared with BZX84-C5V1-7-F and MMSZ5231B-7-F, DDZ9689-7 uniquely supports sub-100 µA bias networks while maintaining SOD123 compatibility and industry-leading low-leakage performance at 3 V reverse bias.
Availability
DDZ9689-7 is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, and USB-C accessory designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for DDZ9689-7 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
DDZ9689-7 belongs to the DDZ9678–DDZ9717 series of low-current Zener diodes engineered specifically for battery-powered and space-constrained applications demanding precision voltage regulation at microampere bias levels.
FAQ
What is the maximum allowable continuous reverse voltage for DDZ9689-7?
The device is rated for continuous reverse operation up to its nominal zener voltage of 5.1 V, with guaranteed breakdown behavior between 4.85 V and 5.36 V. Exceeding 5.36 V may cause uncontrolled conduction or thermal runaway unless current-limited to ≤500 mW dissipation under defined board thermal conditions.
Can DDZ9689-7 be used in automotive applications?
Only the Q-suffix variants (e.g., DDZ9689Q-7) are AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. The standard DDZ9689-7 is not automotive-qualified and lacks PPAP documentation or change control tracking required for automotive Tier 1 supply chains.
What is the typical zener impedance at 50 µA for this part?
Based on Figure 11 in DS30410 Rev. 17-2, the typical zener impedance for DDZ9689-7 is approximately 8 Ω at IZT = 50 µA and TJ = 25°C. Impedance rises significantly below 10 µA and decreases slightly above 100 µA, remaining under 12 Ω across its operational current range.
Does DDZ9689-7 require special PCB layout considerations?
Yes - Diodes Incorporated specifies a minimum recommended pad layout for SOD123 to achieve the rated 500 mW power dissipation at TL = +75°C. The layout must provide adequate copper area and thermal relief per their Suggested Pad Layout document (available at diodes.com/package-outlines.html) to maintain RθJA ≤ 340 °C/W.
DDZ9689-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 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-123
DDZ9689-7 FAQ
1.How can I place an order for DDZ9689-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9689-7 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 DDZ9689-7 reliable?
The price and inventory of DDZ9689-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9689-7 is usually 5 days.
3.What payment methods are accepted for DDZ9689-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9689-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9689-7?
DDZ9689-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9689-7 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 DDZ9689-7?
For technical support, including DDZ9689-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9689-7 requirements.
6.How does Aetrix verify that DDZ9689-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9689-7 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 DDZ9689-7 meets industry standards.
7.What is the process for return or replacement of DDZ9689-7?
All DDZ9689-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9689-7, 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 DDZ9689-7 part is unused and in its original packaging.
Return procedure for DDZ9689-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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