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Microchip Technology 1N4566/TR
- Part No.:
- 1N4566/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4566/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:8,021
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Product details
Overview
1N4566/TR from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 0.5 mA test current, ±0.005%/°C temperature coefficient, and 200 Ω dynamic impedance at IZT, used in precision voltage references for aerospace instrumentation and high-reliability analog circuits.
For engineers reviewing the 1N4566/TR datasheet, 1N4566/TR pinout, 1N4566/TR application, or 1N4566/TR equivalent, this part delivers ultra-low TC stability over –55°C to +100°C, hermetic glass packaging, MIL-PRF-19500/452 qualification readiness, and ESD immunity per MIL-STD-750 Method 1020 - critical for mission-critical analog reference design.
Technical Context
This device belongs to Microsemi's zero-TC Zener family optimized for minimal voltage drift across temperature. Its 6.4 V nominal Zener voltage is achieved via internal metallurgical bonding and dual-junction compensation, enabling stable operation at 0.5 mA test current with 0.005%/°C TC over –55°C to +100°C.
The 1N4566/TR operates within a 500 mW power dissipation limit at 25°C lead temperature, but optimal TC performance requires operation below 30 mW. It features a cathode-banded polarity, tin-lead solderable leads, and hermetically sealed glass construction compliant with DO-7 mechanical standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V ±5% at 0.5 mA - defines primary reference level for analog calibration circuits |
| Temperature Coefficient (αVZ) | ±0.005%/°C - enables <0.4 mV/°C drift over full operating range, critical for precision metrology |
| Zener Test Current (IZT) | 0.5 mA - specified bias point for guaranteed VZ and TC performance |
| Dynamic Impedance (ZZT) | 200 Ω at IZT - determines load regulation sensitivity in feedback networks |
| Max Reverse Current (IR) | 2.0 µA at 3 V - ensures low leakage in high-impedance reference nodes |
| Operating Temperature Range | –55°C to +100°C - supports extended-range industrial and aerospace environments |
| Package | DO-7 (DO-204AA) - axial-leaded, hermetically sealed glass case with cathode band marking |
Pinout & Package
DO-7 (DO-204AA) package: hermetically sealed glass case with two axial leads; cathode identified by black band; polarity requires banded end to be positive relative to unbanded end during operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; reverse-biased configuration requires current sink into cathode |
| Cathode (banded end) | Reference output node | Provides stable 6.4 V potential when reverse-biased at 0.5 mA; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Zener structure | Internal dual-junction metallurgical bonding achieves ±0.005%/°C TC - eliminates need for external compensation networks |
| Hermetic glass DO-7 package | Sealed construction ensures long-term parameter stability and moisture resistance in harsh environments |
| MIL-PRF-19500/452 qualification path | Add JAN/JANTX/JANTXV prefix + "-1" suffix (e.g., JANTX1N4566-1) for military-grade screening and traceability |
| ESD robustness | Immune to electrostatic discharge per MIL-STD-750 Method 1020 - reduces handling risk in assembly and field repair |
| Tape-and-reel option | "TR" suffix indicates EIA-296-compliant packaging - enables automated SMT placement of axial devices via carrier tape |
Applications
| Aerospace Instrumentation Reference | High-Reliability Power Supply Trim |
|---|---|
Use Scenario: Precision voltage reference in satellite attitude control sensor signal conditioning. IC Role / Device Role / Timing Role: Zener reference diode providing stable 6.4 V bias for ADC reference buffers and op-amp gain-setting networks. Use Value: ±0.005%/°C TC ensures <±0.5 mV drift over –55°C to +100°C, meeting Class S radiation-tolerant system accuracy requirements. |
Use Scenario: Output voltage trimming in MIL-STD-704 airborne DC-DC converters. IC Role / Device Role / Timing Role: Primary reference element in feedback loop of isolated flyback regulator. Use Value: Hermetic DO-7 package withstands thermal cycling and vibration; 0.5 mA IZT enables low-power trim without compromising loop stability. |
| Calibration Equipment Standard | Nuclear Monitoring Analog Front-End |
Use Scenario: Portable multimeter calibration source requiring traceable 6.4 V reference. IC Role / Device Role / Timing Role: Primary voltage standard in self-calibrating reference ladder subsystem. Use Value: Tight TC and 200 Ω ZZT minimize loading error and thermal hysteresis during multi-point calibration sequences. |
Use Scenario: Bias reference for gamma spectrometer preamplifier charge-sensitive amplifiers. IC Role / Device Role / Timing Role: Low-noise, low-drift reference supplying gate bias to JFET input stages. Use Value: 2.0 µA max IR at 3 V prevents leakage-induced offset drift in ultra-high-impedance detector interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4566A/TR | Same 6.4 V / 0.5 mA / ±0.005%/°C spec, but tighter initial VZ tolerance (±1% vs ±5%) | Used where factory-calibrated accuracy is required without post-installation trimming | Select 1N4566A/TR when absolute initial accuracy outweighs cost sensitivity |
| 1N4567/TR | Identical package and IZT, but lower TC (±0.002%/°C) and same 6.4 V nominal | Preferred in ultra-stable lab-grade references where sub-0.2 mV/°C drift is mandatory | Choose 1N4567/TR only if TC improvement justifies higher unit cost and longer lead times |
Compared with 1N4566/TR, the 1N4566A/TR offers verified tighter VZ tolerance without altering TC or package, while 1N4567/TR reduces TC by 60% but increases cost and may require revalidation of thermal loop stability.
Availability
1N4566/TR is available at Aetrix Electronics and suitable for aerospace instrumentation, high-reliability power supply trim, and calibration equipment requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N4566/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 analog, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N4566/TR belongs to Microsemi's legacy Scottsdale Division zero-TC Zener reference diode family, engineered specifically for applications demanding minimal voltage drift under extreme thermal stress and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N4566/TR?
The 1N4566/TR has a nominal Zener voltage of 6.4 V with a tolerance of ±5% at 0.5 mA test current, as specified in the Electrical Characteristics table. Tighter tolerances (e.g., ±1%, ±2%) are available via suffixes like "-1%" but require explicit ordering of variants such as 1N4566A-1% - the base 1N4566/TR does not include enhanced tolerance.
Does the 1N4566/TR meet military specifications?
The 1N4566/TR itself is a commercial-grade part, but it serves as the base for MIL-PRF-19500/452 qualified versions. Adding prefixes (JAN, JANTX, JANTXV) and the "-1" suffix - e.g., JANTX1N4566-1 - yields fully screened military-grade units with extended testing, traceability, and environmental validation per specification requirements.
What is the maximum power dissipation rating for the 1N4566/TR?
The 1N4566/TR is rated for 500 mW DC power dissipation at 25°C lead temperature (TL). However, the datasheet explicitly states that optimum temperature coefficient performance occurs at power levels below 30 mW - meaning sustained operation above this level degrades TC stability, even if within absolute maximum ratings.
Can the 1N4566/TR be used in surface-mount designs?
No - the 1N4566/TR uses a DO-7 (DO-204AA) axial-leaded glass package and is not a surface-mount device. Microsemi offers surface-mount equivalents (e.g., JANTX1N4569AUR-1 in DO-213AA), but those are distinct part numbers with different form factors, thermal profiles, and qualification paths.
Is the 1N4566/TR sensitive to electrostatic discharge (ESD)?
No - the 1N4566/TR is nonsensitive to ESD per MIL-STD-750 Method 1020, confirmed in the official datasheet. This makes it suitable for manual handling and repair in field-deployed systems without requiring special ESD precautions beyond standard industry practice.
1N4566/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.4 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N4566/TR FAQ
1.How can I place an order for 1N4566/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4566/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 1N4566/TR reliable?
The price and inventory of 1N4566/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4566/TR is usually 5 days.
3.What payment methods are accepted for 1N4566/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4566/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4566/TR?
1N4566/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4566/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 1N4566/TR?
For technical support, including 1N4566/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4566/TR requirements.
6.How does Aetrix verify that 1N4566/TR is sourced from the original manufacturer or authorized distributors?
All 1N4566/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 1N4566/TR meets industry standards.
7.What is the process for return or replacement of 1N4566/TR?
All 1N4566/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4566/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 1N4566/TR part is unused and in its original packaging.
Return procedure for 1N4566/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4566/TR Tags
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