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Microchip Technology 1N4579A/TR
- Part No.:
- 1N4579A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4579A/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,165
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Product details
Overview
1N4579A/TR from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 2.0 mA test current, 0.0005 %/°C temperature coefficient, 50 Ω dynamic impedance, and operating temperature range of –65 °C to +175 °C. It delivers high-stability voltage referencing in precision instrumentation and military-grade power supply feedback loops.
For engineers reviewing the 1N4579A/TR datasheet, 1N4579A/TR pinout, 1N4579A/TR application, or 1N4579A/TR equivalent, key selection criteria include its ultra-low TC (0.0005 %/°C), tight 6.4 V ±5% nominal tolerance, hermetic DO-7 packaging, MIL-PRF-19500/452 qualification readiness, and TR tape-and-reel availability for automated assembly.
Technical Context
This device belongs to Microsemi's 1N4565–1N4584A-1 series of zero-TC Zener references, engineered with internal metallurgical bonding to minimize thermal hysteresis and long-term drift. Its 6.4 V nominal Zener voltage is optimized for temperature compensation via matched junctions, achieving sub-0.001 %/°C stability over –55 °C to +100 °C.
The 1N4579A/TR operates at 2.0 mA Zener test current (IZT), delivering 50 Ω dynamic impedance (ZZT) and <2.0 µA reverse leakage at 3 V. Its hermetically sealed glass case and tin-lead plated leads comply with MIL-STD-750 Method 2026 for solderability and Method 1020 for ESD immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V ±5% at 2.0 mA - stable reference point for calibration-critical analog circuits |
| Temperature Coefficient (αVZ) | 0.0005 %/°C - enables <0.03 mV/°C drift over –55 °C to +100 °C |
| Zener Test Current (IZT) | 2.0 mA - optimal bias point for minimal TC and lowest dynamic impedance |
| Dynamic Impedance (ZZT) | 50 Ω @ IZT - ensures low AC noise coupling into reference node |
| Max Reverse Current (IR) | 2.0 µA @ 3 V - guarantees negligible leakage error in high-impedance divider networks |
| Operating Temperature | –65 °C to +175 °C - supports aerospace, downhole, and extended industrial environments |
| Power Dissipation | 500 mW @ TL = 25 °C - allows robust operation with derating above ambient |
Pinout & Package
Package: DO-7 (DO-204AA), hermetically sealed glass axial-leaded case with cathode band marking; leads are tin-lead plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground terminal | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Reference output terminal | Banded end; supplies stable 6.4 V when reverse-biased at 2.0 mA; polarity must be observed |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low temperature coefficient | 0.0005 %/°C - reduces system gain drift in precision ADC/DAC references |
| Hermetic glass encapsulation | DO-7 package with MIL-STD-750 qualified leads - ensures reliability in harsh, high-humidity, or vacuum environments |
| MIL-PRF-19500/452 readiness | Qualified via JAN/JANTX/JANTXV prefix + "-1" suffix - enables drop-in use in defense and space programs |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board-level design |
| Tape-and-reel packaging | "TR" suffix denotes EIA-296 compliant reel - supports high-volume SMT placement without manual handling |
Applications
| High-Precision Instrumentation | Aerospace Power Monitoring |
|---|---|
|
Use Scenario: Calibration of 16-bit+ data acquisition systems requiring sub-10 ppm/°C reference stability. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end op-amp biasing and ADC reference input. Use Value: 0.0005 %/°C TC and 50 Ω ZZT minimize measurement error across –40 °C to +85 °C operating range. |
Use Scenario: Voltage monitoring in satellite power distribution units exposed to thermal cycling in LEO. IC Role / Device Role / Timing Role: Reference element in isolated DC-DC converter feedback loop for bus regulation. Use Value: Hermetic DO-7 package and –65 °C to +175 °C rating ensure functionality during orbital thermal extremes. |
| Military Grade Power Supplies | Downhole Oilfield Sensors |
|
Use Scenario: Field-deployable radar transceiver power modules requiring MIL-qualified components. IC Role / Device Role / Timing Role: Stable 6.4 V reference for programmable voltage regulators and fault-detection comparators. Use Value: JANTXV qualification path and 2.0 µA IR at 3 V prevent false trip events under transient load conditions. |
Use Scenario: Pressure/temperature sensor nodes in oil well logging tools operating at 150 °C ambient. IC Role / Device Role / Timing Role: Precision reference for signal conditioning amplifiers and RTD bridge excitation. Use Value: Verified operation up to +175 °C and low TC enable accurate sensor linearization without active compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4574A | Same 6.4 V nominal, same 0.0005 %/°C TC, but rated for 1.0 mA IZT and 100 Ω ZZT | Lower bias current requirement suits ultra-low-power battery-backed systems | Select 1N4574A when total reference current budget is ≤1.0 mA and higher dynamic impedance is acceptable |
| 1N4584A | Same 6.4 V nominal, same 0.0005 %/°C TC, but rated for 4.0 mA IZT and 25 Ω ZZT | Lower impedance supports high-speed regulation loops and lower-noise analog stages | Select 1N4584A when system demands <25 Ω source impedance and can support 4.0 mA continuous bias |
Compared with 1N4574A and 1N4584A, the 1N4579A/TR offers a balanced trade-off: 2.0 mA bias enables better noise performance than 1N4574A while reducing power overhead versus 1N4584A-ideal for mid-power instrumentation where thermal management and stability coexist.
Availability
1N4579A/TR is available at Aetrix Electronics and suitable for high-reliability instrumentation, aerospace power monitoring, and military-grade power supply designs requiring stable component supply, traceable sourcing, and long-lifecycle continuity.
Supply support for 1N4579A/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, radiation-tolerant, and military-qualified analog and mixed-signal components.
The 1N4565–1N4584A-1 series was designed specifically for precision voltage referencing in mission-critical systems where long-term stability, wide temperature operation, and MIL-spec compliance are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4579A/TR?
The 1N4579A/TR has a nominal Zener voltage of 6.4 V with a standard tolerance of ±5%. Tighter tolerances (e.g., ±1%, ±2%) are available by adding suffixes like "-1%" to the part number, per Microsemi's ordering convention documented in the datasheet revision B.
Is 1N4579A/TR qualified to MIL-PRF-19500/452?
The base 1N4579A/TR is not inherently qualified, but it is fully compatible with MIL-PRF-19500/452 when ordered with appropriate prefixes and suffixes-e.g., JANTX1N4579A-1. This qualification path is explicitly defined in the datasheet notes and supported by Microsemi's Scottsdale Division manufacturing process.
What is the maximum power dissipation for 1N4579A/TR?
The 1N4579A/TR has a maximum DC power dissipation of 500 mW at lead temperature (TL) of 25 °C. However, the datasheet recommends operating below 30 mW for optimum voltage-temperature stability, aligning with its 2.0 mA test current and 6.4 V rating.
Does 1N4579A/TR require external ESD protection?
No. The 1N4579A/TR is nonsensitive to ESD per MIL-STD-750 Method 1020, as confirmed in the official Microsemi datasheet. Its internal construction and glass package eliminate the need for additional TVS or RC filtering in most PCB layouts.
What does the "TR" suffix indicate in 1N4579A/TR?
The "TR" suffix in 1N4579A/TR indicates tape-and-reel packaging per EIA-296 standards. This configuration enables automated pick-and-place assembly and is distinct from bulk or ammo-pack variants-critical for high-volume production of 1N4579A/TR-based systems.
1N4579A/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):
- 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:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4579A/TR FAQ
1.How can I place an order for 1N4579A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4579A/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 1N4579A/TR reliable?
The price and inventory of 1N4579A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4579A/TR is usually 5 days.
3.What payment methods are accepted for 1N4579A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4579A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4579A/TR?
1N4579A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4579A/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 1N4579A/TR?
For technical support, including 1N4579A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4579A/TR requirements.
6.How does Aetrix verify that 1N4579A/TR is sourced from the original manufacturer or authorized distributors?
All 1N4579A/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 1N4579A/TR meets industry standards.
7.What is the process for return or replacement of 1N4579A/TR?
All 1N4579A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4579A/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 1N4579A/TR part is unused and in its original packaging.
Return procedure for 1N4579A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4579A/TR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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