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Microchip Technology 1N4577AUR-1/TR
- Part No.:
- 1N4577AUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4577AUR-1/TR.pdf
- Description:
- DIODE ZENER 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:88
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Product details
Overview
1N4577AUR-1/TR from Microsemi is a temperature-compensated Zener reference diode in DO-213AA (MELF) glass package, rated for 2.0 mA test current, ±0.002 %/°C temperature coefficient, 20 mV maximum voltage stability over −55°C to +100°C, and 50 Ω dynamic impedance - used in precision voltage references for aerospace instrumentation and satellite power regulation.
For engineers reviewing the 1N4577AUR-1/TR datasheet, 1N4577AUR-1/TR pinout, 1N4577AUR-1/TR application, or 1N4577AUR-1/TR equivalent, key selection criteria include low TC drift, hermetic MELF packaging for high-reliability environments, stable operation at 2 mA bias, and compliance with MIL-PRF-19500/452 Class JANTXV.
Technical Context
This device implements metallurgically bonded, double-plug Zener construction to minimize thermal hysteresis and long-term drift. Its temperature compensation is achieved via internal series-connected junctions that counteract intrinsic TC variation across −55°C to +100°C.
Designed for low-current operation (2.0 mA IZT), it delivers 20 mV max voltage deviation over full military temperature range and maintains 50 Ω Zener impedance - enabling stable reference generation without external buffering in space-grade analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | Specified at 2.0 mA; enables precise low-power reference design without excessive self-heating |
| Temp Coefficient | ±0.002 %/°C; ensures <±20 ppm/°C drift for metrology-grade stability |
| Voltage Stability | ≤20 mV over −55°C to +100°C; meets MIL-PRF-19500/452 Class JANTXV limits |
| Zener Impedance | 50 Ω max at 2.0 mA; supports tight regulation under varying load conditions |
| Package | DO-213AA (MELF); hermetically sealed glass case for moisture resistance and reliability |
| Power Dissipation | 500 mW @ +50°C; derates linearly to 4 mW/°C above ambient |
Pinout & Package
DO-213AA (MELF) glass package: cylindrical, leadless, axial symmetry; cathode identified by single black band; no discrete pins - mounted via end-cap soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal | Connected to lower potential node; requires reverse-bias configuration |
| Cathode | Current source terminal | Banded end; connected to higher potential; defines Zener breakdown polarity |
Key Features
| Feature | Design Value |
|---|---|
| Temperature Compensation | ±0.002 %/°C TC enables sub-20 ppm/°C reference stability over full military range |
| Hermetic MELF Packaging | DO-213AA glass seal prevents moisture ingress and ensures >10-year shelf life in space applications |
| Double-Plug Construction | Metallurgically bonded junctions reduce thermal hysteresis and improve long-term voltage repeatability |
| Low Operating Current | 2.0 mA IZT minimizes self-heating error while maintaining regulation integrity |
Applications
| Avionics Power Monitoring | Satellite ADC Reference |
|---|---|
Use Scenario: Real-time bus voltage supervision in flight control computers requiring <±0.01% accuracy over −55°C to +100°C. IC Role / Device Role / Timing Role: Precision Zener reference for comparator threshold setting and analog-to-digital conversion calibration. Use Value: 20 mV max voltage deviation ensures consistent trip-point detection across extreme thermal cycling. | Use Scenario: Reference voltage source for 16-bit SAR ADCs in LEO satellite telemetry systems. IC Role / Device Role / Timing Role: Stable DC reference input to ADC voltage reference buffer stage. Use Value: 50 Ω Zener impedance and ±0.002 %/°C TC maintain ENOB >15.2 bits over mission lifetime. |
| Missile Guidance Sensor Bias | Nuclear Instrumentation Calibration |
Use Scenario: Bias supply for radiation-hardened op-amps in inertial measurement unit (IMU) front-end amplifiers. IC Role / Device Role / Timing Role: Low-drift voltage reference for transducer signal conditioning circuitry. Use Value: Double-plug construction suppresses hysteresis-induced offset shifts during rapid thermal transients. | Use Scenario: Calibration standard in portable gamma spectrometers deployed in field radiological surveys. IC Role / Device Role / Timing Role: Primary voltage reference for DAC-based energy scale alignment. Use Value: Hermetic DO-213AA package ensures zero parametric shift after 500 krad(Si) total ionizing dose exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4577A | Same electrical specs and DO-213AA package; identical test current, TC, and impedance | No functional difference; CDLL4577A is Microsemi's commercial-grade variant of same die | Select CDLL4577A for non-military programs where MIL-PRF-19500 qualification is not required |
| 1N4577AUR-1 | Same die and specs; differs only in tape-and-reel packaging (TR vs. bulk) | No performance or application impact; TR format enables automated SMT placement | Choose 1N4577AUR-1/TR when using pick-and-place assembly; otherwise 1N4577AUR-1 bulk is functionally identical |
Compared with CDLL4577A and 1N4577AUR-1, the 1N4577AUR-1/TR offers identical Zener performance but adds JEDEC-compliant tape-and-reel delivery for high-volume SMT production - critical for aerospace OEMs requiring traceable, machine-ready components.
Availability
1N4577AUR-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, satellite ADC reference, and missile guidance sensor bias requiring stable component supply under MIL-PRF-19500/452 Class JANTXV compliance.
Supply support for 1N4577AUR-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4577AUR-1/TR belongs to the CDLL4565–CDLL4584A family of temperature-compensated Zener references engineered specifically for precision voltage regulation in extended-temperature, radiation-tolerant, and hermetically sealed systems.
FAQ
What is the Zener test current for the 1N4577AUR-1/TR?
The 1N4577AUR-1/TR is specified at a Zener test current (IZT) of 2.0 mA. This value is used to measure nominal Zener voltage, temperature coefficient, and dynamic impedance per MIL-PRF-19500/452. Operating outside this current may increase TC drift or impedance variance, so the 1N4577AUR-1/TR should be biased accordingly in final circuit design.
Is the 1N4577AUR-1/TR compliant with MIL-PRF-19500/452?
Yes, the 1N4577AUR-1/TR is qualified to MIL-PRF-19500/452 Class JANTXV. It meets all screening, testing, and marking requirements including temperature cycling, hermeticity, and long-term stability verification - confirming its suitability for high-reliability military and space applications as defined in the specification for the 1N4577AUR-1/TR.
What does the "TR" suffix indicate in 1N4577AUR-1/TR?
The "TR" suffix in 1N4577AUR-1/TR denotes tape-and-reel packaging per EIA-481 standards. This format enables automated surface-mount assembly and provides moisture-sensitive level (MSL) 1 handling. The underlying die, electrical specs, and DO-213AA package remain identical to the bulk version - the 1N4577AUR-1/TR differs only in delivery method.
How does the temperature coefficient of the 1N4577AUR-1/TR compare to standard Zeners?
The 1N4577AUR-1/TR has a temperature coefficient of ±0.002 %/°C - over 10× tighter than typical 5.6 V Zeners (≈±0.02 %/°C). This ultra-low TC is achieved via dual-junction compensation and verified across −55°C to +100°C, making the 1N4577AUR-1/TR suitable for applications where reference drift must stay below ±20 ppm/°C.
Can the 1N4577AUR-1/TR be used in place of CDLL4577A?
Yes, the 1N4577AUR-1/TR is electrically and physically identical to CDLL4577A, sharing the same Zener voltage, TC, impedance, and DO-213AA package. The only distinction is qualification level: CDLL4577A is commercial-grade, while the 1N4577AUR-1/TR carries JANTXV screening. For non-military use, CDLL4577A is a direct alternative; the 1N4577AUR-1/TR remains the preferred choice where MIL-spec compliance is mandatory.
1N4577AUR-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
1N4577AUR-1/TR FAQ
1.How can I place an order for 1N4577AUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4577AUR-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 1N4577AUR-1/TR reliable?
The price and inventory of 1N4577AUR-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 1N4577AUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4577AUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4577AUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4577AUR-1/TR?
1N4577AUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4577AUR-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 1N4577AUR-1/TR?
For technical support, including 1N4577AUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4577AUR-1/TR requirements.
6.How does Aetrix verify that 1N4577AUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4577AUR-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 1N4577AUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4577AUR-1/TR?
All 1N4577AUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4577AUR-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 1N4577AUR-1/TR part is unused and in its original packaging.
Return procedure for 1N4577AUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4577AUR-1/TR Tags
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