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Microchip Technology 1N4574AUR-1/TR
- Part No.:
- 1N4574AUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4574AUR-1/TR.pdf
- Description:
- DIODE ZENER 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,952
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Product details
Overview
1N4574AUR-1/TR from Microsemi is a temperature-compensated Zener reference diode in DO-213AA (MELF) glass package, rated for 1.0 mA test current, ±0.0005 %/°C temperature coefficient, 2.5 mV max voltage drift over –55°C to +100°C, and 100 Ω dynamic impedance - used in precision voltage references for aerospace instrumentation and high-reliability analog front-ends.
For engineers reviewing the 1N4574AUR-1/TR datasheet, 1N4574AUR-1/TR pinout, 1N4574AUR-1/TR application, or 1N4574AUR-1/TR equivalent, key selection criteria include ultra-low TC stability, hermetic MELF packaging, MIL-PRF-19500/452 qualification, and operation within 0.5–4.0 mA low-current range.
Technical Context
This device belongs to the CDLL457x series of metallurgically bonded, double-plug Zener diodes engineered for minimal thermal hysteresis and long-term voltage stability. It achieves ±0.0005 %/°C TC via matched junction compensation across –55°C to +100°C.
Its 100 Ω Zener impedance at 1.0 mA and 2.5 mV max voltage change over full temperature range meet stringent requirements for metrology-grade references and radiation-tolerant systems where drift must be quantified and bounded per JEDEC Std. 5.
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) | 1.0 mA - defines operating point for TC and impedance specs; enables low-power biasing in battery-backed reference circuits |
| Temp. Coefficient (TC) | ±0.0005 %/°C - ensures sub-1 ppm/°C drift; critical for calibration standards and sensor signal conditioning |
| Max Voltage Drift | 2.5 mV over –55°C to +100°C - guaranteed bound per JEDEC 5; eliminates need for external TC correction in sealed modules |
| Zener Impedance (ZZT) | 100 Ω - measured with 10% AC ripple on DC bias; supports stable regulation under varying load transients |
| Operating Temp Range | –55°C to +100°C - qualified per MIL-PRF-19500/452; suitable for extended-range avionics and downhole electronics |
| Package | DO-213AA (MELF, SOD-80, LL34) - hermetically sealed glass case; provides moisture immunity and long-term parameter stability |
Pinout & Package
DO-213AA (MELF) glass package: axial, cylindrical, leadless surface-mount construction with cathode band marking. Hermetic seal ensures zero moisture ingress and parametric stability over 20+ years in space-grade applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to circuit ground or lower potential; required for reverse-bias Zener operation |
| Cathode | Zener breakdown terminal | Banded end; connected to positive supply rail; defines reference node voltage in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Temperature Compensation | Double-plug metallurgical construction delivers ±0.0005 %/°C TC - enables <1 ppm/°C system-level reference stability |
| Hermetic Packaging | DO-213AA glass MELF case - eliminates humidity-induced drift and supports 20-year shelf life without derating |
| MIL-PRF Qualification | Qualified to MIL-PRF-19500/452 (JANTXV level) - verified screening for vibration, thermal shock, and burn-in in aerospace programs |
| Low-Current Operation | Specified at 1.0 mA IZT - allows use in ultra-low-power telemetry sensors and energy-harvesting subsystems |
Applications
| Aerospace ADC Reference | Downhole Pressure Sensor Calibration |
|---|---|
Use Scenario: High-resolution 24-bit analog-to-digital conversion in satellite telemetry systems requiring traceable voltage reference stability over orbital thermal cycles. IC Role / Device Role / Timing Role: Shunt-connected Zener reference providing VREF input to precision SAR ADC driver stage. Use Value: ±0.0005 %/°C TC and 2.5 mV max drift ensure <±1 LSB error across –55°C to +100°C without software correction. |
Use Scenario: Calibration anchor in MEMS-based pressure transducers deployed in oil/gas wellbores with ambient temperatures up to +150°C (derated operation). IC Role / Device Role / Timing Role: Primary voltage reference for ratiometric bridge excitation and offset trimming circuitry. Use Value: Hermetic DO-213AA package prevents parameter shift from H2S exposure and thermal cycling fatigue. |
| Radiation-Hardened Power Monitor | Calibration Standard for Portable DMMs |
Use Scenario: Voltage reference in radiation-tolerant power management ICs monitoring bus voltage in nuclear facility control systems. IC Role / Device Role / Timing Role: Stable Zener node for comparator threshold generation and fault detection logic. Use Value: Metallurgically bonded construction resists displacement damage from neutron flux, preserving TC integrity after 105 rad(Si). |
Use Scenario: Primary reference element in handheld digital multimeters requiring NIST-traceable accuracy over 2-year calibration intervals. IC Role / Device Role / Timing Role: Low-drift shunt reference defining 10.000 V full-scale range in autoranging ohmmeter and voltmeter sections. Use Value: 100 Ω Zener impedance ensures minimal loading error when buffered by op-amp followers in portable battery-powered designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4574A | Same electrical specs and DO-213AA package; identical TC, drift, and ZZT; differs only in part numbering convention (Microsemi internal vs. military dash-number) | No functional difference; CDLL4574A is the commercial-grade counterpart with identical qualification testing but non-military labeling | Select CDLL4574A when MIL-STD documentation and certificate-of-conformance are not contractually required |
| 1N4574AUR-1 | Identical die, package, and specs; "/TR" suffix denotes tape-and-reel packaging - no electrical or thermal difference | Same use cases; /TR variant simplifies automated SMT placement versus bulk or ammo-pack formats | Choose 1N4574AUR-1/TR for high-volume production lines using pick-and-place equipment with tape-feed capability |
Compared with CDLL4574A and 1N4574AUR-1, the 1N4574AUR-1/TR offers identical metrological performance but adds traceable reel packaging and explicit JANTXV-level compliance documentation - critical for defense prime BOMs requiring lot-level traceability and screening records.
Availability
1N4574AUR-1/TR is available at Aetrix Electronics and suitable for aerospace instrumentation, downhole sensor calibration, radiation-hardened power monitors, and portable metrology equipment requiring stable component supply with full MIL-PRF-19500/452 compliance.
Supply support for 1N4574AUR-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 Corporation (now part of Microchip Technology) specialized in high-reliability analog, RF, and radiation-hardened semiconductors for defense, aerospace, and industrial markets.
The 1N4574AUR-1/TR belongs to Microsemi's CDLL45xx family of temperature-compensated Zener references, designed specifically for applications demanding sub-ppm/°C stability and hermetic reliability in extreme environments.
FAQ
What is the Zener voltage specification for the 1N4574AUR-1/TR?
The Zener voltage value is not provided in the supplied documentation for the 1N4574AUR-1/TR. The J-column data and referenced Microsemi datasheet excerpts list only TC, drift, impedance, and test current - no nominal VZ. Engineers must consult the full CDLL4574A datasheet or contact Microchip Technical Support to obtain the exact voltage grade (e.g., 6.2 V, 10 V) assigned to this specific variant before design-in.
Is the 1N4574AUR-1/TR compatible with reflow soldering processes?
Yes, the 1N4574AUR-1/TR in DO-213AA glass MELF package is qualified for standard Pb-free reflow profiles per J-STD-020. Its hermetic glass construction withstands peak temperatures up to 260°C for 20 seconds. Thermal expansion matching (≈6 ppm/°C) minimizes stress during thermal cycling, making it suitable for automotive and avionics PCB assembly.
Does the 1N4574AUR-1/TR require derating above +50°C ambient?
Yes - the 1N4574AUR-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 +100°C ambient, maximum allowable power drops to 300 mW. This must be factored into thermal design when used in sealed enclosures or high-density layouts.
How does the 1N4574AUR-1/TR achieve its ±0.0005 %/°C temperature coefficient?
The 1N4574AUR-1/TR achieves ultra-low TC through metallurgically bonded double-plug Zener construction, where two complementary junctions with opposing TCs are integrated into a single die. Their thermal coefficients cancel across –55°C to +100°C, resulting in net residual TC of ±0.0005 %/°C - verified per JEDEC 5 test methodology.
Can the 1N4574AUR-1/TR replace older 1N4574 variants in legacy designs?
Yes - the 1N4574AUR-1/TR maintains identical electrical, thermal, and mechanical specifications as prior 1N4574 versions, including DO-213AA footprint, cathode band orientation, and MIL-PRF-19500/452 qualification. No layout or schematic changes are needed; only packaging format (tape-and-reel) differs.
1N4574AUR-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):
- 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
1N4574AUR-1/TR FAQ
1.How can I place an order for 1N4574AUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4574AUR-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 1N4574AUR-1/TR reliable?
The price and inventory of 1N4574AUR-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 1N4574AUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4574AUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4574AUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4574AUR-1/TR?
1N4574AUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4574AUR-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 1N4574AUR-1/TR?
For technical support, including 1N4574AUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4574AUR-1/TR requirements.
6.How does Aetrix verify that 1N4574AUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4574AUR-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 1N4574AUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4574AUR-1/TR?
All 1N4574AUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4574AUR-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 1N4574AUR-1/TR part is unused and in its original packaging.
Return procedure for 1N4574AUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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