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Microchip Technology 1N4566A/TR
- Part No.:
- 1N4566A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4566A/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,962
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Product details
Overview
1N4566A/TR from Microsemi is a temperature-compensated 6.4 V Zener reference diode in DO-7 (DO-204AA) glass axial package, rated for 0.5 mA test current, ±0.005%/°C tempco, and 200 Ω dynamic impedance at IZT, used in precision voltage references for aerospace instrumentation and high-reliability analog circuits.
For engineers reviewing the 1N4566A/TR datasheet, 1N4566A/TR pinout, 1N4566A/TR application, or 1N4566A/TR equivalent, this part delivers ultra-low drift performance across -55°C to +100°C operating range with hermetically sealed construction, MIL-PRF-19500/452 qualification readiness, and ESD immunity per MIL-STD-750 Method 1020.
Technical Context
This device belongs to Microsemi's zero-temperature-coefficient Zener family optimized for stable 6.4 V reference generation. It achieves ±0.005%/°C tempco via internal metallurgical bonding and operates at 0.5 mA test current to minimize self-heating effects on voltage stability.
The 1N4566A/TR uses a DO-7 glass axial package with tin-lead plated leads, supports cathode-positive biasing, and maintains ≤2 µA reverse leakage at 3 V - enabling low-power, high-accuracy reference designs in harsh thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V ±5% nominal - provides tight baseline reference for calibration-grade circuits |
| Tempco (αVZ) | ±0.005%/°C - ensures minimal voltage drift over -55°C to +100°C operating range |
| Zener Test Current (IZT) | 0.5 mA - defines optimal bias point for specified voltage and impedance performance |
| Dynamic Impedance (ZZT) | 200 Ω @ IZT - limits AC error contribution in feedback or regulation loops |
| Reverse Leakage (IR) | ≤2 µA @ 3 V - enables low-current bias networks without significant error injection |
| Power Dissipation | 500 mW @ TL = 25°C - supports robust operation with derating above ambient |
| Operating Temp Range | -65°C to +175°C - qualified for extended-range military and aerospace applications |
Pinout & Package
DO-7 (DO-204AA) hermetically sealed glass axial package with two leads: anode (unbanded end) and cathode (banded end). Cathode must be biased positive relative to anode for proper Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference diode P-side terminal | Connected to circuit ground or lower potential node in cathode-positive configuration |
| Cathode | Reference diode N-side terminal | Banded end; connected to regulated voltage node - must be held at higher potential than anode |
Key Features
| Feature | Design Value |
|---|---|
| Temperature coefficient | ±0.005%/°C - reduces voltage drift to <0.32 mV/°C over full operating range |
| Hermetic glass sealing | DO-7 package - ensures long-term parameter stability and moisture resistance in mission-critical systems |
| MIL-PRF-19500/452 readiness | Add JAN/JANTX/JANTXV prefix + "-1" suffix - enables direct path to qualified military procurement |
| ESD immunity | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external protection in handling and assembly |
| Tape-and-reel packaging | "TR" suffix - supports automated SMT placement despite axial form factor via carrier tape adaptation |
Applications
| Aerospace Instrumentation | Calibration Equipment |
|---|---|
Use Scenario: High-accuracy sensor signal conditioning in satellite telemetry modules exposed to thermal cycling between -55°C and +100°C. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing and DAC output scaling. Use Value: ±0.005%/°C tempco ensures <±0.5 mV total drift over operational range, meeting Class A metrology requirements. |
Use Scenario: Portable handheld calibrators requiring traceable 6.4 V reference under battery-powered, low-power conditions. IC Role / Device Role / Timing Role: Primary reference source for programmable voltage outputs and self-test circuits. Use Value: 0.5 mA IZT enables stable operation at <1.5 mW power draw while maintaining 200 Ω ZZT for low-noise output. |
| Military Avionics | Industrial Process Controllers |
Use Scenario: Analog front-end reference in flight control computers where radiation tolerance and thermal resilience are mandatory. IC Role / Device Role / Timing Role: Stable bias reference for op-amp gain-setting networks and comparator thresholds. Use Value: Hermetic DO-7 package and -65°C to +175°C storage rating support JANTXV qualification pathways and field longevity. |
Use Scenario: Modular PLC analog I/O modules operating in factory environments with ambient swings from 0°C to +70°C. IC Role / Device Role / Timing Role: Reference for 4–20 mA transmitter output stages and isolated sensor excitation. Use Value: ≤2 µA reverse leakage at 3 V prevents loading errors in high-impedance feedback paths of precision current sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4566/TR | No "A" suffix → ±5% VZ tolerance only; same tempco (±0.005%/°C), IZT (0.5 mA), and ZZT (200 Ω) | Acceptable where tighter initial tolerance is not required; no MIL-qualification path | Select 1N4566/TR for cost-sensitive industrial use; choose 1N4566A/TR when guaranteed tempco and qualification readiness are needed |
| 1N4571A/TR | Higher IZT = 1.0 mA; same VZ (6.4 V), tempco (±0.005%/°C), and ZZT (100 Ω) | Better suited for higher-current reference buffers or noise-sensitive circuits needing lower impedance | Choose 1N4571A/TR if design requires <100 Ω dynamic impedance; retain 1N4566A/TR for ultra-low-power bias networks |
Compared with 1N4566/TR and 1N4571A/TR, the 1N4566A/TR uniquely balances ultra-low tempco, minimal test current, and military qualification readiness - making it optimal for space-constrained, thermally demanding, and high-assurance reference designs where both stability and procurement compliance matter.
Availability
1N4566A/TR is available at Aetrix Electronics and suitable for aerospace instrumentation, calibration equipment, and military avionics requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for 1N4566A/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 and mixed-signal components for defense, aerospace, and industrial markets.
The 1N4566A/TR belongs to Microsemi's Scottsdale Division legacy Zener reference diode product line, engineered specifically for ultra-stable voltage referencing in extreme-temperature and mission-critical systems.
FAQ
What is the Zener voltage tolerance for 1N4566A/TR?
The 1N4566A/TR has a nominal Zener voltage of 6.4 V with a tolerance of ±5%, as specified in the Electrical Characteristics table. The "A" suffix denotes this standard tolerance grade; tighter tolerances (e.g., ±1%) require additional suffixes like "-1%" per Microsemi's ordering convention.
Does 1N4566A/TR support military qualification?
Yes - the 1N4566A/TR is designed for MIL-PRF-19500/452 qualification. Adding prefixes such as JANTX or JANTXV and the "-1" suffix (e.g., JANTX1N4566A-1) yields the fully qualified version. The base 1N4566A/TR meets all electrical and mechanical specs required for that qualification path.
What is the maximum operating temperature for 1N4566A/TR?
The 1N4566A/TR supports continuous operation from -65°C to +175°C. Its specified temperature coefficient of ±0.005%/°C applies over the narrower range of -55°C to +100°C, ensuring optimal stability in critical aerospace and avionics thermal profiles.
How does the "TR" suffix affect packaging and handling of 1N4566A/TR?
The "TR" suffix indicates tape-and-reel packaging per EIA-296 standards, enabling automated placement despite the DO-7 axial form factor. This format includes moisture-sensitive level (MSL) handling guidance and supports consistent feeding in high-volume production lines.
Is 1N4566A/TR compatible with lead-free soldering processes?
No - the 1N4566A/TR features tin-lead plated leads per MIL-STD-750 Method 2026, with a maximum solder temperature rating of 260°C for 10 seconds. Lead-free reflow profiles exceeding 260°C or prolonged exposure may compromise hermetic seal integrity and long-term reliability.
1N4566A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, 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-204AH (DO-35)
1N4566A/TR FAQ
1.How can I place an order for 1N4566A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4566A/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 1N4566A/TR reliable?
The price and inventory of 1N4566A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4566A/TR is usually 5 days.
3.What payment methods are accepted for 1N4566A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4566A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4566A/TR?
1N4566A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4566A/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 1N4566A/TR?
For technical support, including 1N4566A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4566A/TR requirements.
6.How does Aetrix verify that 1N4566A/TR is sourced from the original manufacturer or authorized distributors?
All 1N4566A/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 1N4566A/TR meets industry standards.
7.What is the process for return or replacement of 1N4566A/TR?
All 1N4566A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4566A/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 1N4566A/TR part is unused and in its original packaging.
Return procedure for 1N4566A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4566A/TR Tags
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