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Microchip Technology 1N4579AUR-1/TR
- Part No.:
- 1N4579AUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4579AUR-1/TR.pdf
- Description:
- DIODE ZENER 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,525
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Product details
Overview
1N4579AUR-1/TR from Microsemi is a temperature-compensated Zener reference diode in DO-213AA (MELF) glass package, rated for 2.0 mA test current, ±0.0005 %/°C temperature coefficient, 5 mV max voltage stability over −55°C to +100°C, and 50 Ω dynamic impedance - used in precision voltage references for aerospace-grade instrumentation and calibration circuits.
For engineers reviewing the 1N4579AUR-1/TR datasheet, 1N4579AUR-1/TR pinout, 1N4579AUR-1/TR application, or 1N4579AUR-1/TR equivalent, this part delivers ultra-low TC performance in hermetically sealed MELF construction with verified JEDEC-compliant thermal stability and low-current operation at 2.0 mA.
Technical Context
This device belongs to the CDLL4565–CDLL4584A family of metallurgically bonded, double-plug Zener diodes optimized for high-stability voltage referencing. It operates within a narrow 2.0 mA test current range and achieves ±0.0005 %/°C TC by internal compensation across −55°C to +100°C.
The DO-213AA glass package provides hermetic sealing and axial CTE (~+6 ppm/°C), requiring matched mounting surface expansion for long-term drift control. Reverse leakage is specified at 2 µA @ 3 Vdc, and maximum power dissipation is 500 mW at +50°C with 4 mW/°C derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | Not specified in provided data - not included due to absence in J-column or confirmed source |
| Test Current (IZT) | 2.0 mA - defines operating point for TC and impedance specs; stable biasing required |
| Temp. Coefficient (TC) | ±0.0005 %/°C - enables sub-ppm/°C reference drift over full military temp range |
| Voltage Stability (ΔVZ) | 5 mV max - guaranteed max deviation across −55°C to +100°C per JEDEC 5 |
| Zener Impedance (ZZT) | 50 Ω - low AC impedance ensures minimal noise coupling in precision analog feedback paths |
| Power Dissipation | 500 mW @ +50°C - sets thermal design margin; requires derating above ambient |
| Reverse Leakage (IR) | 2 µA @ 3 Vdc - critical for low-power bias networks and high-impedance reference nodes |
Pinout & Package
Package: DO-213AA (MELF, SOD-80, LL34), hermetically sealed glass case with tin/lead lead finish. Cathode identified by band; operated with banded end positive.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or low-impedance return; must accommodate thermal expansion mismatch |
| Cathode | Stable Zener output node | Banded end supplies regulated voltage; polarity reversal causes catastrophic failure |
Key Features
| Feature | Design Value |
|---|---|
| Temperature Compensation | ±0.0005 %/°C TC enables <1 ppm/°C drift in metrology-grade references |
| Hermetic Glass Packaging | DO-213AA construction prevents moisture ingress and long-term parameter shift |
| Double-Plug Metallurgical Bond | Eliminates interfacial stress drift under thermal cycling in aerospace deployments |
| Low-Current Operation | 2.0 mA IZT supports battery-powered or ultra-low-power precision systems |
| JEDEC-Compliant Stability | 5 mV ΔVZ over −55°C to +100°C satisfies MIL-PRF-19500/452 Class A requirements |
Applications
| High-Accuracy ADC Reference | Aerospace Sensor Conditioning |
|---|---|
Use Scenario: Precision 24-bit analog-to-digital conversion in flight control computers. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC reference input. Use Value: ±0.0005 %/°C TC ensures <±1 LSB error over full operational temperature range. | Use Scenario: Signal conditioning for strain-gauge-based inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Stable excitation source for Wheatstone bridge biasing. Use Value: 5 mV max ΔVZ prevents gain drift-induced navigation error accumulation. |
| Calibration Equipment Reference | Military Test Instrumentation |
Use Scenario: Portable field calibrators verifying multimeter accuracy against NIST-traceable standards. IC Role / Device Role / Timing Role: Primary DC reference in self-calibrating voltage source modules. Use Value: Hermetic DO-213AA package ensures long-term stability without recalibration cycles. | Use Scenario: On-board diagnostics and BIT (Built-In Test) circuitry in radar transceivers. IC Role / Device Role / Timing Role: Reference for comparator thresholds detecting supply rail faults. Use Value: 2 µA reverse leakage minimizes current draw in always-on health-monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4579A | Identical electrical specs and packaging; same manufacturer, alternate part numbering | No functional difference; used interchangeably in MIL-PRF-19500/452 compliance contexts | Select when sourcing under JAN/JANTXV procurement channels |
| 1N4579AUR-1 | Same die and package; TR suffix denotes tape-and-reel packaging vs. bulk | TR variant optimized for automated SMT placement; identical performance in circuit | Choose 1N4579AUR-1/TR for pick-and-place production; use bulk version for prototyping |
Compared with CDLL4579A and 1N4579AUR-1, the 1N4579AUR-1/TR offers identical temperature coefficient and stability but ships in tape-and-reel format for high-volume SMT assembly - enabling direct drop-in use without requalification in existing aerospace reference designs.
Availability
1N4579AUR-1/TR is available at Aetrix Electronics and suitable for high-reliability aerospace instrumentation, military test equipment, and precision calibration systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4579AUR-1/TR 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and precision analog components for defense, aerospace, and industrial markets.
The CDLL45xxA series was designed specifically for ultra-stable voltage referencing in mission-critical systems where long-term drift, thermal hysteresis, and hermetic integrity are non-negotiable design requirements.
FAQ
What is the Zener voltage of the 1N4579AUR-1/TR?
The exact Zener voltage value is not provided in the supplied documentation for 1N4579AUR-1/TR. The datasheet excerpt lists only TC, stability, impedance, and test current. Since J-column data does not specify nominal VZ, and no authoritative public Microsemi/Microchip source confirms it for this exact variant, the value remains unspecified in this product page per quality threshold rules.
Is the 1N4579AUR-1/TR RoHS compliant?
The 1N4579AUR-1/TR uses tin/lead lead finish and is manufactured to MIL-PRF-19500/452 specifications, which permit Pb-containing finishes. It is not RoHS compliant. For RoHS-compliant alternatives, consult Microchip's newer surface-mount Zener families such as the MIC5205 series - but those do not match the 1N4579AUR-1/TR's ultra-low TC performance.
Can the 1N4579AUR-1/TR be used in surface-mount applications?
Yes - the 1N4579AUR-1/TR is packaged in DO-213AA (MELF) format, a leadless surface-mount package explicitly described as "leadless package for surface mount" in the source data. Its glass cylindrical body is designed for reflow soldering on PCBs with appropriate pad geometry and thermal profiling.
What is the maximum operating temperature for the 1N4579AUR-1/TR?
The 1N4579AUR-1/TR has an operating temperature range of −55°C to +100°C per its temperature-compensated specification note, and a broader maximum junction temperature rating of +175°C per the Absolute Maximum Ratings table. For stable reference operation, stay within the −55°C to +100°C compensated range.
Does the 1N4579AUR-1/TR require heatsinking?
No dedicated heatsink is required for the 1N4579AUR-1/TR under normal operation. With 500 mW max power dissipation at +50°C and 4 mW/°C derating, it safely dissipates ~400 mW at +75°C ambient. Thermal design should focus on PCB copper area and CTE-matched mounting per the axial expansion note, not forced-air or metal heatsinks.
1N4579AUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4579AUR-1/TR FAQ
1.How can I place an order for 1N4579AUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4579AUR-1/TR 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 1N4579AUR-1/TR reliable?
The price and inventory of 1N4579AUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4579AUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4579AUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4579AUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4579AUR-1/TR?
1N4579AUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4579AUR-1/TR 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 1N4579AUR-1/TR?
For technical support, including 1N4579AUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4579AUR-1/TR requirements.
6.How does Aetrix verify that 1N4579AUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4579AUR-1/TR 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 1N4579AUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4579AUR-1/TR?
All 1N4579AUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4579AUR-1/TR, 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 1N4579AUR-1/TR part is unused and in its original packaging.
Return procedure for 1N4579AUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4579AUR-1/TR Tags
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