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Microchip Technology 1N4576AUR-1/TR
- Part No.:
- 1N4576AUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4576AUR-1/TR.pdf
- Description:
- DIODE ZENER 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:110
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Product details
Overview
1N4576AUR-1/TR from Microsemi is a temperature-compensated Zener reference diode in DO-213AA (MELF) glass package, rated for 2.0 mA test current, ±0.005 %/°C temperature coefficient, 50 Ω dynamic impedance, and 50 mV voltage stability over −55°C to +100°C per JEDEC 5. It serves as a precision voltage reference in analog measurement and calibration circuits.
For engineers reviewing the 1N4576AUR-1/TR datasheet, 1N4576AUR-1/TR pinout, 1N4576AUR-1/TR application, or 1N4576AUR-1/TR equivalent, key selection criteria include low TC (±0.005 %/°C), tight voltage stability (≤50 mV), MELF surface-mount compatibility, and operation within 2.0 mA nominal Zener current under industrial temperature extremes.
Technical Context
This device belongs to the CDLL4576A family of metallurgically bonded, double-plug Zener diodes engineered for high-stability voltage referencing. Its compensated structure minimizes drift across −55°C to +100°C, with voltage change bounded to ≤50 mV over that range per JEDEC standard No. 5.
It operates at 2.0 mA Zener test current with 50 Ω dynamic impedance (ZZT), enabling stable regulation in low-power analog subsystems. The hermetically sealed glass DO-213AA package ensures long-term reliability and low leakage (IR ≤ 2 µA at 3 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | Not specified in provided data - only CDLL4576A is listed with 2.0 mA test current; 1N4576AUR-1/TR maps to CDLL4576A per MIL-PRF-19500/452 cross-reference. |
| Zener Test Current (IZT) | 2.0 mA - defines operating point where voltage stability and TC are guaranteed; critical for biasing reference stages in precision ADCs and DACs. |
| Temperature Coefficient (TC) | ±0.005 %/°C - enables sub-10 ppm/°C drift performance; suitable for metrology-grade references without external compensation. |
| Dynamic Impedance (ZZT) | 50 Ω - limits AC ripple coupling into reference node; supports stable operation under varying load conditions in regulated supplies. |
| Voltage Stability (ΔVZ) | ≤50 mV over −55°C to +100°C - meets JEDEC 5 requirement; ensures consistent reference accuracy across full military temperature range. |
| Reverse Leakage (IR) | ≤2 µA at VR = 3 V, 25°C - minimizes error current in high-impedance reference divider networks. |
| Package | DO-213AA (MELF, SOD-80, LL34) - hermetically sealed glass surface-mount package with axial CTE ≈ +6 ppm/°C for thermal-matched PCB mounting. |
Pinout & Package
DO-213AA (MELF) glass package: cylindrical, leadless, axial geometry with cathode band marking. Mounting position unrestricted; recommended substrate CTE ~+6 ppm/°C for thermal stress mitigation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reference output terminal | Connected to regulated positive rail; polarity must be observed - reverse bias required for Zener conduction. |
| Anode (unbanded end) | Ground/reference return | Common return path for bias current; forms low-leakage junction with cathode to establish stable VZ. |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | ±0.005 %/°C TC - achieves <10 ppm/°C drift, eliminating need for external TC correction in portable calibrators. |
| Hermetic glass sealing | DO-213AA package - prevents moisture ingress and long-term parameter shift; qualified for MIL-PRF-19500/452 (JANTXV level). |
| Double-plug construction | Metallurgically bonded junction - enhances thermal stability and reduces hysteresis during thermal cycling. |
| Low-current operation | 2.0 mA IZT - enables use in battery-powered instrumentation with minimal quiescent power draw. |
Applications
| Portable Digital Multimeter Reference | Aerospace ADC Voltage Reference |
|---|---|
Use Scenario: High-accuracy DC voltage measurement in handheld DMMs requiring stable 3½–4½ digit resolution over extended field temperature ranges. IC Role / Device Role / Timing Role: Primary Zener reference source for internal DAC/ADC reference ladder and auto-zero amplifier biasing. Use Value: ±0.005 %/°C TC and ≤50 mV total drift ensure <0.01% full-scale error contribution across −20°C to +60°C ambient. |
Use Scenario: Precision analog front-end in flight control sensor signal conditioning modules exposed to −55°C to +100°C operational environments. IC Role / Device Role / Timing Role: Stable reference for radiation-tolerant SAR ADCs and isolated current-sense amplifiers. Use Value: Hermetic DO-213AA packaging and JANTXV qualification support mission-critical reliability without derating. |
| Calibration Equipment Standard | Industrial Process Transmitter |
Use Scenario: Benchtop calibration standards used to verify multimeters, data loggers, and sensor simulators in metrology labs. IC Role / Device Role / Timing Role: Core voltage reference in programmable reference sources with <1 ppm/h stability requirements. Use Value: ≤50 mV voltage variation over full military temp range enables traceable 0.005% accuracy without oven control. |
Use Scenario: 4–20 mA loop-powered transmitters deployed in oil/gas refineries with ambient swings from −40°C to +85°C. IC Role / Device Role / Timing Role: Low-power Zener shunt reference for microcontroller-based signal conditioning and HART modulation circuitry. Use Value: 2.0 mA IZT and 50 Ω ZZT allow stable regulation from limited loop power budget while rejecting supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4576A | Identical electrical specs and DO-213AA package; same MIL-PRF-19500/452 compliance; differs only in part numbering convention (CDLL vs. 1N prefix). | No functional difference; CDLL4576A is the base military-spec die designation referenced in the same datasheet table. | Select CDLL4576A when sourcing requires explicit CDLL-series documentation or legacy BOM alignment. |
| 1N4576AUR-1 | Omits "/TR" suffix - indicates bulk (non-tape-and-reel) packaging; identical electrical and mechanical specs otherwise. | Suitable for prototyping or low-volume hand-soldered builds where reel packaging is unnecessary. | Choose 1N4576AUR-1/TR for automated SMT assembly; choose 1N4576AUR-1 for bench evaluation or small-batch rework. |
Compared with CDLL4576A and 1N4576AUR-1, the 1N4576AUR-1/TR offers identical Zener performance and military qualification but adds tape-and-reel packaging optimized for high-throughput pick-and-place manufacturing - no electrical or thermal trade-offs.
Availability
1N4576AUR-1/TR is available at Aetrix Electronics and suitable for portable instrumentation, aerospace sensor interfaces, calibration standards, and industrial loop-powered transmitters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4576AUR-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 1N4576AUR-1/TR belongs to Microsemi's CDLL45xxA series of temperature-compensated Zener references, designed specifically for metrology-grade voltage stability in harsh-environment analog systems.
FAQ
What is the Zener voltage specification for 1N4576AUR-1/TR?
The exact Zener voltage value is not provided in the supplied data sheet excerpt. However, per the CDLL4576A row in the Electrical Characteristics table, the 1N4576AUR-1/TR corresponds to the CDLL4576A variant tested at 2.0 mA, confirming its classification within the 1N4576AUR-1 family. Full VZ tolerance and nominal value require consultation of the complete Microsemi MIL-PRF-19500/452 specification document for 1N4576AUR-1/TR.
Is 1N4576AUR-1/TR compliant with MIL-PRF-19500/452?
Yes, the 1N4576AUR-1/TR is explicitly listed in the data sheet as part of the 1N4565AUR-1 through 1N4584AUR-1 series qualified per MIL-PRF-19500/452. It meets JANTXV-level screening requirements including temperature cycling, burn-in, and parametric testing for high-reliability applications.
What does the "/TR" suffix mean in 1N4576AUR-1/TR?
The "/TR" suffix denotes tape-and-reel packaging - standard for automated SMT placement. The 1N4576AUR-1/TR contains the same DO-213AA MELF device as the bulk-packaged 1N4576AUR-1, with identical electrical, thermal, and reliability characteristics. Only the packaging format differs.
Can 1N4576AUR-1/TR replace standard Zener diodes like 1N4733A?
No - the 1N4576AUR-1/TR is not a drop-in replacement for general-purpose Zeners. It is a precision, temperature-compensated reference with ±0.005 %/°C TC and 50 mV stability over −55°C to +100°C, whereas 1N4733A has ±5 % tolerance and uncontrolled TC. Substitution would require full circuit validation and likely redesign of biasing and filtering.
What is the maximum power dissipation for 1N4576AUR-1/TR?
The 1N4576AUR-1/TR has a DC power dissipation rating of 500 mW at +50°C, with linear derating of 4 mW/°C above that temperature. At maximum operating temperature (+175°C), usable power drops to 0 mW; typical operation at 2.0 mA keeps power well below 100 mW, ensuring safe thermal margin in most layouts.
1N4576AUR-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
1N4576AUR-1/TR FAQ
1.How can I place an order for 1N4576AUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4576AUR-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 1N4576AUR-1/TR reliable?
The price and inventory of 1N4576AUR-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 1N4576AUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4576AUR-1/TR?
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4.How is shipping managed for 1N4576AUR-1/TR?
1N4576AUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4576AUR-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 1N4576AUR-1/TR?
For technical support, including 1N4576AUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4576AUR-1/TR requirements.
6.How does Aetrix verify that 1N4576AUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4576AUR-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 1N4576AUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4576AUR-1/TR?
All 1N4576AUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4576AUR-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 1N4576AUR-1/TR part is unused and in its original packaging.
Return procedure for 1N4576AUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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