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Microchip Technology 1N4573A/TR
- Part No.:
- 1N4573A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4573A/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,345
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Product details
Overview
1N4573A/TR from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 1.0 mA test current, 0.001%/°C temperature coefficient, 100 Ω dynamic impedance, and operation from –65°C to +175°C. It delivers high-stability voltage referencing in precision analog instrumentation and military-grade power supply feedback loops.
For engineers reviewing the 1N4573A/TR datasheet, 1N4573A/TR pinout, 1N4573A/TR application, or 1N4573A/TR equivalent, key selection criteria include its ultra-low TC (0.001%/°C), hermetic DO-7 packaging, MIL-PRF-19500/452 qualification readiness, and tight 6.4 V ±5% nominal tolerance at 1 mA bias.
Technical Context
This device belongs to Microsemi's zero-temperature-coefficient Zener family optimized for minimal voltage drift across wide thermal ranges. Its internal metallurgical bonding and hermetically sealed glass construction ensure long-term stability under harsh environmental stress.
The 1N4573A/TR operates with a fixed 1.0 mA Zener test current (IZT), delivering 6.4 V nominal output with ±5% initial tolerance and 0.001%/°C TC over –55°C to +100°C. Dynamic impedance remains stable at 100 Ω, supporting low-noise regulation in high-precision analog circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.4 V ±5% at IZT = 1.0 mA - defines primary reference accuracy under standard test conditions |
| Temperature Coefficient | 0.001%/°C - ensures voltage drift ≤0.077 mV/°C over operating range, critical for metrology-grade references |
| Zener Test Current (IZT) | 1.0 mA - required bias current to achieve specified VZ and TC; lower than 4 mA variants for reduced self-heating |
| Dynamic Impedance (ZZT) | 100 Ω @ IZT - limits AC ripple coupling into reference node; suitable for low-noise op-amp biasing |
| Operating Temperature Range | –65°C to +175°C - enables deployment in aerospace, downhole, and engine-control environments |
| Package | DO-7 (DO-204AA) - hermetically sealed glass axial-leaded package with tin-lead plated leads per MIL-STD-750 |
| Max Reverse Current @ 3 V | 2.0 µA - confirms low leakage below knee voltage, essential for standby-power-sensitive designs |
Pinout & Package
DO-7 (DO-204AA) hermetically sealed glass package with 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 reference node | Connected to circuit common; reverse-biased operation requires this terminal at lower potential |
| Cathode (banded end) | Stable 6.4 V output node | Provides regulated voltage when reverse-biased at 1.0 mA; must be held at higher potential than anode |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | 0.001%/°C TC enables <±0.1 mV total drift over –55°C to +100°C, eliminating external trimming |
| Hermetic DO-7 packaging | Sealed glass construction ensures immunity to humidity, corrosion, and long-term parameter shift in mission-critical systems |
| MIL-PRF-19500/452 readiness | Add JAN/JANTX/JANTXV prefix + "-1" suffix (e.g., JANTX1N4573A-1) for qualified military use without redesign |
| ESD robustness | Nonsensitive to ESD per MIL-STD-750 Method 1020 - eliminates need for on-board protection in handling-sensitive assemblies |
Applications
| High-Accuracy Data Acquisition Systems | Aerospace Power Supply Monitoring |
|---|---|
Use Scenario: Reference voltage source for 16-bit+ SAR ADCs and precision DACs in laboratory-grade instruments. IC Role / Device Role / Timing Role: Primary voltage reference establishing full-scale input range and offset calibration baseline. Use Value: 0.001%/°C TC and 100 Ω ZZT minimize code-width variation and integral nonlinearity across thermal cycles. |
Use Scenario: Feedback sensing element in radiation-tolerant DC-DC converter voltage control loops aboard satellites. IC Role / Device Role / Timing Role: Stable 6.4 V reference for error amplifier input in isolated flyback or forward converters. Use Value: –65°C to +175°C operation and hermetic DO-7 package support reliability in vacuum and thermal-vacuum environments. |
| Military Avionics Sensor Signal Conditioning | Downhole Oil & Gas Instrumentation |
Use Scenario: Biasing and scaling reference for strain-gauge bridge amplifiers in flight control surface position sensors. IC Role / Device Role / Timing Role: Precision reference for instrumentation amplifier gain-setting and offset nulling networks. Use Value: MIL-PRF-19500/452 qualification path and low TC ensure compliance with DO-160E environmental test requirements. |
Use Scenario: Voltage reference in high-temperature pressure transducer signal chains deployed at >150°C wellbore depths. IC Role / Device Role / Timing Role: Core reference node for analog front-end conditioning of piezoresistive sensor outputs. Use Value: Guaranteed operation to +175°C and low leakage (<2 µA @ 3 V) maintain accuracy despite extreme thermal soak and aging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4572A/TR | Same DO-7 package and 6.4 V nominal, but 0.002%/°C TC and 100 Ω ZZT at 1.0 mA IZT | Slightly higher TC increases drift by ~0.15 mV over –55°C to +100°C vs. 1N4573A/TR | Select when tighter TC is not required and cost optimization is prioritized |
| 1N4574A/TR | Same DO-7 package and 6.4 V nominal, but 0.0005%/°C TC and 100 Ω ZZT at 1.0 mA IZT | Lower TC reduces drift by ~0.1 mV over same range, enabling highest-tier metrology use | Select when sub-0.001%/°C stability is mandated for calibration-grade equipment |
Compared with 1N4572A/TR and 1N4574A/TR, the 1N4573A/TR strikes a balanced trade-off between ultra-low TC performance and cost, offering 0.001%/°C stability ideal for industrial and avionics applications where 1N4572A/TR lacks precision and 1N4574A/TR exceeds requirement.
Availability
1N4573A/TR is available at Aetrix Electronics and suitable for high-reliability power supply monitoring, aerospace sensor conditioning, and downhole instrumentation requiring stable component supply across extended temperature and lifecycle demands.
Supply support for 1N4573A/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 1N4573A/TR belongs to Microsemi's legacy Scottsdale Division DO-7 Zener reference diode series, engineered specifically for ultra-stable voltage referencing in mission-critical systems where parametric drift must be minimized across extreme thermal and environmental stress.
FAQ
What is the Zener test current for 1N4573A/TR?
The 1N4573A/TR is characterized at a Zener test current (IZT) of 1.0 mA. This current is required to achieve its specified 6.4 V nominal voltage and 0.001%/°C temperature coefficient. Operating significantly above or below this value increases dynamic impedance and degrades TC performance, so biasing circuits must be designed to maintain ~1.0 mA under all operating conditions for optimal 1N4573A/TR behavior.
Does 1N4573A/TR have military qualification out of the box?
No, the base 1N4573A/TR is not pre-qualified to MIL-PRF-19500/452. However, it is fully compatible with that specification: adding the JANTX prefix and "-1" suffix (e.g., JANTX1N4573A-1) yields the qualified version. The underlying die and DO-7 construction meet all screening and testing requirements-only the ordering nomenclature and certification documentation differ for the 1N4573A/TR derivative.
What does the "TR" suffix mean in 1N4573A/TR?
The "TR" suffix in 1N4573A/TR indicates tape-and-reel packaging per EIA-296 standard, intended for automated SMT placement. Though the DO-7 package is axial-leaded, Microsemi offers this variant for reel-fed insertion equipment used in high-mix, low-volume military and aerospace assembly lines. The "TR" does not alter electrical specs-the 1N4573A/TR performs identically to bulk-packaged 1N4573A.
Can 1N4573A/TR replace 1N4574A/TR in an existing design?
Yes, the 1N4573A/TR can functionally replace 1N4574A/TR in most applications, as both share identical DO-7 package, 6.4 V nominal voltage, 1.0 mA IZT, and 100 Ω ZZT. The only difference is TC: 1N4574A/TR offers 0.0005%/°C versus 0.001%/°C for 1N4573A/TR. If the original design tolerates ~0.05 mV additional drift over temperature, the 1N4573A/TR is a direct drop-in alternative.
What is the maximum power dissipation rating for 1N4573A/TR?
The 1N4573A/TR has a maximum DC power dissipation of 500 mW at lead temperature (TL) of 25°C, corresponding to a maximum Zener current (IZM) of 70 mA. However, for optimal voltage-temperature stability, Microsemi specifies operation below 30 mW-achievable at ~4.7 mA max at 6.4 V. In practice, the 1N4573A/TR is intended for low-power reference use, not power regulation, so typical designs limit current to its 1.0 mA IZT to preserve TC and longevity.
1N4573A/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):
- 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:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4573A/TR FAQ
1.How can I place an order for 1N4573A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4573A/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 1N4573A/TR reliable?
The price and inventory of 1N4573A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4573A/TR is usually 5 days.
3.What payment methods are accepted for 1N4573A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4573A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4573A/TR?
1N4573A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4573A/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 1N4573A/TR?
For technical support, including 1N4573A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4573A/TR requirements.
6.How does Aetrix verify that 1N4573A/TR is sourced from the original manufacturer or authorized distributors?
All 1N4573A/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 1N4573A/TR meets industry standards.
7.What is the process for return or replacement of 1N4573A/TR?
All 1N4573A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4573A/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 1N4573A/TR part is unused and in its original packaging.
Return procedure for 1N4573A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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