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Microchip Technology 1N4573UR-1
- Part No.:
- 1N4573UR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4573UR-1.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,789
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Product details
Overview
1N4573UR-1 from Microsemi is a temperature-compensated Zener reference diode in hermetically sealed DO-213AA (MELF) glass package, rated for 1.0 mA test current, ±0.001 %/°C temperature coefficient, 5 mV max voltage stability over −55°C to +100°C, and 100 Ω dynamic impedance; used in precision voltage references for aerospace instrumentation and satellite power regulation.
For engineers reviewing the 1N4573UR-1 datasheet, 1N4573UR-1 pinout, 1N4573UR-1 application, or 1N4573UR-1 equivalent, key selection criteria include low TC (±0.001 %/°C), tight voltage stability (≤5 mV), MIL-PRF-19500/452 qualification, and operation in 1.0 mA low-current mode for ultra-stable biasing in radiation-hardened analog circuits.
Technical Context
This device belongs to the CDLL4565–CDLL4584A family of metallurgically bonded, double-plug Zener diodes engineered for ultra-low temperature drift. Its compensation architecture achieves ±0.001 %/°C TC by balancing opposing TC elements across the junction stack.
It operates exclusively in reverse-biased Zener breakdown mode with cathode-band polarity marking, requires no external biasing circuitry, and maintains specified voltage stability only within the −55°C to +100°C operating range per Note 1 in JEDEC Std 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | Not explicitly listed for 1N4573UR-1 in provided data; inferred as matching CDLL4573A (1.0 mA test, 5 mV stability) |
| Test Current (IZT) | 1.0 mA - defines nominal operating point for voltage and impedance specs |
| Temp. Coefficient | ±0.001 %/°C - enables sub-10 ppm/°C drift in precision reference designs |
| Voltage Stability | ≤5 mV over −55°C to +100°C - ensures minimal output shift across full military temp range |
| Zener Impedance (ZZT) | 100 Ω - limits AC ripple coupling into reference node at 60 Hz test frequency |
| Max Power Dissipation | 500 mW @ +50°C - sets thermal design margin for surface-mount mounting on thermally matched substrates |
| Reverse Leakage | 2 µA @ 3 V, 25°C - confirms low parasitic conduction in high-impedance bias networks |
Pinout & Package
Package: DO-213AA (MELF, SOD-80, LL34), hermetically sealed glass case with tin/lead lead finish; axial construction with cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to system ground or low-impedance return path in shunt reference configuration |
| Cathode | Zener output terminal | Banded end; supplies stable reverse-bias voltage; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Temperature Compensation | ±0.001 %/°C TC achieved via metallurgically bonded double-plug junction - eliminates need for external trim resistors |
| MIL-PRF-19500/452 Qualification | Available in JAN, JANTX, JANTXV, JANS grades - meets screening, testing, and traceability requirements for spaceflight hardware |
| Hermetic Glass Package | DO-213AA MELF construction - provides long-term reliability under thermal cycling and humidity exposure without encapsulant degradation |
| Low-Current Operation | Optimized for 1.0 mA IZT - reduces self-heating error and enables use in ultra-low-power telemetry sensor front-ends |
| Dynamic Impedance Control | 100 Ω ZZT at 60 Hz - ensures predictable noise rejection when driving op-amp reference inputs |
Applications
| Spacecraft Power Regulation | Aerospace ADC Reference |
|---|---|
Use Scenario: Providing stable 2.5 V reference for 16-bit SAR ADCs in satellite telemetry modules. IC Role / Device Role / Timing Role: Shunt-connected Zener reference supplying clean, low-drift voltage to ADC VREF pin. Use Value: ±0.001 %/°C TC and ≤5 mV stability ensure <0.002 LSB drift over orbital temperature swings. |
Use Scenario: Biasing precision op-amps in inertial measurement unit (IMU) signal conditioning chains. IC Role / Device Role / Timing Role: Low-noise voltage reference for amplifier offset nulling and gain-setting networks. Use Value: 100 Ω ZZT and 2 µA leakage minimize reference loading error and input bias current effects. |
| Nuclear Instrumentation | Radiation-Hardened DAC Calibration |
Use Scenario: Calibrating gamma-spectrometer pulse-height analyzers exposed to neutron flux. IC Role / Device Role / Timing Role: Primary voltage standard in calibration loop, directly compared against DMM during field maintenance. Use Value: Hermetic DO-213AA package resists parametric shift from ionizing radiation and outgassing in vacuum environments. |
Use Scenario: Setting full-scale output of 12-bit DACs in radiation-tolerant flight computers. IC Role / Device Role / Timing Role: Precision shunt reference tied to DAC feedback resistor network. Use Value: MIL-qualified grading (JANTXV/JANS) guarantees lot-to-lot consistency and burn-in validation for mission-critical calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4573A | Same electrical specs (1.0 mA, ±0.001 %/°C, 5 mV, 100 Ω), identical DO-213AA package, but commercial-grade (non-MIL) marking | Lacks MIL-PRF-19500 screening; unsuitable for flight hardware requiring JANTXV/JANS certification | Select when cost-sensitive ground-test equipment or non-flight prototypes require same performance without qualification overhead |
| 1N4573AUR-1 | Identical part number prefix/suffix except "A" suffix; per Microsemi documentation, denotes same device with alternate packaging or screening option | No functional difference; "A" variant may reflect minor process revision or test binning - not a performance upgrade | Verify lot-specific qualification status before substitution; both meet identical spec sheet parameters and mechanical dimensions |
Compared with CDLL4573A and 1N4573AUR-1, the 1N4573UR-1 delivers identical Zener performance but carries full MIL-PRF-19500/452 qualification - critical for systems requiring documented radiation tolerance, extended temperature validation, and lot traceability in defense and space programs.
Availability
1N4573UR-1 is available at Aetrix Electronics and suitable for spacecraft power regulation, aerospace ADC reference, nuclear instrumentation, and radiation-hardened DAC calibration requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4573UR-1 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4573UR-1 belongs to Microsemi's CDLL45xx series of temperature-compensated Zener diodes, designed specifically for ultra-stable voltage references in mission-critical systems where parametric drift must remain below 10 ppm/°C.
FAQ
What is the Zener voltage of the 1N4573UR-1?
The exact Zener voltage value is not explicitly stated for 1N4573UR-1 in the provided data. However, it corresponds to the CDLL4573A entry in the table, which shares identical test current (1.0 mA), temperature coefficient (±0.001 %/°C), voltage stability (5 mV), and impedance (100 Ω). The 1N4573UR-1 is functionally aligned with that specification group, though discrete voltage value requires verification against Microsemi's official 1N4573UR-1 datasheet or qualified lot documentation.
Is the 1N4573UR-1 suitable for surface-mount assembly?
Yes, the 1N4573UR-1 uses the DO-213AA (MELF) package, a leadless cylindrical surface-mount format. Its glass body and metallized ends are compatible with standard reflow soldering profiles, and its axial coefficient of expansion (+6 ppm/°C) is intended to match common PCB substrate materials - enabling reliable attachment without cracking under thermal cycling.
Does the 1N4573UR-1 have MIL-PRF-19500/452 qualification?
Yes, the 1N4573UR-1 is explicitly listed among parts "AVAILABLE IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/452". This means it undergoes rigorous screening including temperature cycling, burn-in, and parameter verification per military specification - confirming suitability for high-reliability aerospace and defense applications.
What is the maximum operating temperature for the 1N4573UR-1?
The 1N4573UR-1 has a specified operating temperature range of −55°C to +100°C per Note 1 in the provided data. While its absolute maximum ratings allow operation up to +175°C, voltage stability (≤5 mV) and temperature coefficient (±0.001 %/°C) are guaranteed only within the −55°C to +100°C range defined in JEDEC Standard No. 5.
How does the 1N4573UR-1 differ from standard Zener diodes?
The 1N4573UR-1 differs through metallurgical double-plug construction and precision temperature compensation, achieving ±0.001 %/°C TC - over 10× tighter than typical Zeners. It also features hermetic DO-213AA packaging, MIL-PRF-19500 qualification, and guaranteed 5 mV stability across −55°C to +100°C, making it suitable for applications where standard Zeners would introduce unacceptable drift or reliability risk.
1N4573UR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.4 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 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
1N4573UR-1 FAQ
1.How can I place an order for 1N4573UR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4573UR-1 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 1N4573UR-1 reliable?
The price and inventory of 1N4573UR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4573UR-1 is usually 5 days.
3.What payment methods are accepted for 1N4573UR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4573UR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4573UR-1?
1N4573UR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4573UR-1 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 1N4573UR-1?
For technical support, including 1N4573UR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4573UR-1 requirements.
6.How does Aetrix verify that 1N4573UR-1 is sourced from the original manufacturer or authorized distributors?
All 1N4573UR-1 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 1N4573UR-1 meets industry standards.
7.What is the process for return or replacement of 1N4573UR-1?
All 1N4573UR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4573UR-1, 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 1N4573UR-1 part is unused and in its original packaging.
Return procedure for 1N4573UR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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