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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology 1N4584A

Name: 1N4584A
Brand: Microchip Technology
SKU: 1N4584A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4584A

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: 1N4584A.pdf

Description:: DIODE ZENER 6.4V 500MW DO204AH

Quantity:: RFQ Add To RFQ list

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Inventory:9,485

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Product details

Overview

1N4584A from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 4.0 mA test current, 0.0005 %/°C temperature coefficient, 25 Ω dynamic impedance, and operation from –65 °C to +175 °C - used in precision voltage references for aerospace instrumentation and high-reliability analog circuits.

For engineers reviewing the 1N4584A datasheet, 1N4584A pinout, 1N4584A application, or 1N4584A equivalent, this part delivers ultra-low TC stability at 4 mA bias, military-grade hermetic packaging, and JEDEC-registered 6.4 V reference performance across extreme temperature ranges without requiring external compensation circuitry.

Technical Context

The 1N4584A implements a dual-junction temperature-compensated Zener structure that cancels intrinsic TC drift over –65 °C to +175 °C, achieving ±0.0005 %/°C coefficient at 4.0 mA test current. Its 6.4 V nominal output is stabilized via internal metallurgical bonding within a hermetically sealed glass DO-7 case.

It operates with reverse-biased polarity (cathode band positive), supports MIL-PRF-19500/452 qualification when ordered with JANTXV prefix and "-1" suffix, and maintains ≤2 µA reverse leakage at 3 V - enabling stable low-power reference use in unregulated supply rails and sensor excitation circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.4 V ±5% nominal - provides stable mid-range reference compatible with standard op-amp input ranges and ADC reference inputs.
Temperature Coefficient	0.0005 %/°C - enables <±0.5 mV drift over 0–75 °C ambient, critical for calibration-grade instruments.
Zener Test Current (I_ZT)	4.0 mA - optimized bias point where TC and dynamic impedance are minimized; requires series resistor of ~1.4 kΩ at 12 V supply.
Dynamic Impedance (Z_ZT)	25 Ω @ 4.0 mA - ensures minimal AC ripple coupling into reference node during switching supply operation.
Operating Temperature	–65 °C to +175 °C - supports deployment in downhole, avionics, and engine-control environments without derating.
Power Dissipation	500 mW @ T_L = 25 °C - allows direct use in non-heatsinked PCB layouts while maintaining long-term stability.

Pinout & Package

Package: DO-7 (DO-204AA), hermetically sealed glass axial-leaded case with tin-lead plated leads per MIL-STD-750 Method 2026; cathode identified by black band.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Reference ground reference terminal	Connected to system ground or low-impedance return; must remain at lower potential than cathode during operation.
Cathode (banded end)	Stable 6.4 V output terminal	Delivers regulated voltage when reverse-biased; polarity reversal causes forward conduction and loss of regulation.

Key Features

Feature	Design Value
Ultra-low TC Zener structure	0.0005 %/°C coefficient achieved via matched dual-junction compensation - eliminates need for external TC correction networks.
Hermetic DO-7 glass package	Sealed construction ensures long-term parameter stability and immunity to humidity-induced drift in harsh environments.
MIL-PRF-19500/452 qualified variants	JANTXV1N4584A-1 available - meets screening, testing, and traceability requirements for defense and space programs.
Nonsensitive to ESD	Complies with MIL-STD-750 Method 1020 - withstands handling without special grounding protocols during assembly.

Applications

High-Accuracy Data Acquisition	Aerospace Sensor Conditioning
Use Scenario: Precision 16-bit ADC reference in satellite telemetry front-end where thermal cycling occurs between –40 °C and +85 °C. IC Role / Device Role / Timing Role: Primary voltage reference source for SAR ADC reference buffer stage. Use Value: 0.0005 %/°C TC ensures <±0.3 LSB error contribution over full temperature range, meeting Class-S mission accuracy requirements.	Use Scenario: Bridge excitation reference in turbine pressure transducers exposed to 150 °C engine bay temperatures. IC Role / Device Role / Timing Role: Stable excitation source for Wheatstone bridge, isolated from supply rail noise. Use Value: Hermetic DO-7 package and –65 °C to +175 °C rating enable direct mounting near hot-section sensors without drift degradation.
Calibration Equipment Reference	Military Power Supply Monitoring
Use Scenario: Benchtop multimeter reference module requiring annual recalibration traceable to NIST standards. IC Role / Device Role / Timing Role: Primary DC reference in auto-zeroing op-amp loop for offset cancellation. Use Value: 6.4 V output aligns with standard 5 V and 10 V scaling architectures; low 25 Ω Z_ZT prevents loading-induced gain error.	Use Scenario: Voltage monitor in airborne radar power sequencer verifying 5 V and 12 V rail integrity before activation. IC Role / Device Role / Timing Role: Threshold reference for comparator-based undervoltage lockout (UVLO) circuit. Use Value: JANTXV-qualified version ensures radiation tolerance and lot traceability required for DO-160 Section 22 compliance.

High-Accuracy Data Acquisition

Aerospace Sensor Conditioning

Use Scenario: Precision 16-bit ADC reference in satellite telemetry front-end where thermal cycling occurs between –40 °C and +85 °C.

IC Role / Device Role / Timing Role: Primary voltage reference source for SAR ADC reference buffer stage.

Use Value: 0.0005 %/°C TC ensures <±0.3 LSB error contribution over full temperature range, meeting Class-S mission accuracy requirements.

Use Scenario: Bridge excitation reference in turbine pressure transducers exposed to 150 °C engine bay temperatures.

IC Role / Device Role / Timing Role: Stable excitation source for Wheatstone bridge, isolated from supply rail noise.

Use Value: Hermetic DO-7 package and –65 °C to +175 °C rating enable direct mounting near hot-section sensors without drift degradation.

Calibration Equipment Reference

Military Power Supply Monitoring

Use Scenario: Benchtop multimeter reference module requiring annual recalibration traceable to NIST standards.

IC Role / Device Role / Timing Role: Primary DC reference in auto-zeroing op-amp loop for offset cancellation.

Use Value: 6.4 V output aligns with standard 5 V and 10 V scaling architectures; low 25 Ω Z_ZT prevents loading-induced gain error.

Use Scenario: Voltage monitor in airborne radar power sequencer verifying 5 V and 12 V rail integrity before activation.

IC Role / Device Role / Timing Role: Threshold reference for comparator-based undervoltage lockout (UVLO) circuit.

Use Value: JANTXV-qualified version ensures radiation tolerance and lot traceability required for DO-160 Section 22 compliance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4574A	Same 6.4 V nominal, but 1.0 mA I_ZT and identical 0.0005 %/°C TC; higher Z_ZT = 100 Ω.	Better suited for low-current biasing (e.g., micropower battery monitors); less stable under dynamic load transients.	Select 1N4574A only if supply current budget is constrained to ≤1.5 mA and load regulation demands are relaxed.
LM399H	6.95 V buried-Zener IC with on-chip heater; TC = 0.0003 %/°C, but requires 10 mA heater current and external thermal mass.	Used in laboratory-grade standards; not suitable for embedded systems due to power, size, and warm-up time constraints.	Choose LM399H only for metrology-grade bench equipment where absolute accuracy outweighs power and integration penalties.

Compared with 1N4574A and LM399H, the 1N4584A offers optimal balance of ultra-low TC, 4 mA bias compatibility, DO-7 mechanical simplicity, and wide-temperature reliability - making it preferred for embedded aerospace and industrial control reference designs where board space and thermal management are constrained.

Availability

1N4584A is available at Aetrix Electronics and suitable for high-reliability voltage reference applications in aerospace instrumentation, downhole oilfield sensors, and military power monitoring systems requiring stable component supply across extended product lifecycles.

Supply support for 1N4584A 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 RF components for aerospace, defense, and industrial markets.

The 1N45xxA series was designed specifically for precision voltage reference applications demanding extreme temperature stability, hermetic reliability, and military qualification - targeting instrumentation, avionics, and calibration systems.

FAQ

What is the Zener test current for 1N4584A and why is it critical?

The 1N4584A is specified at 4.0 mA Zener test current (I_ZT). This current is critical because it defines the operating point where temperature coefficient and dynamic impedance are minimized - deviating significantly from 4.0 mA increases TC drift and output impedance. For stable performance, the series resistor must be selected to maintain ~4.0 mA through the 1N4584A across expected supply variations.

Does 1N4584A require external temperature compensation?

No, the 1N4584A does not require external temperature compensation. Its internal dual-junction Zener structure achieves an inherent temperature coefficient of 0.0005 %/°C over –65 °C to +175 °C, eliminating the need for thermistors, op-amp correction networks, or software calibration routines typically required with standard Zeners.

Can 1N4584A be used in surface-mount designs?

The standard 1N4584A is axial-leaded DO-7 and not SMT-compatible. However, Microsemi offers a surface-mount equivalent - JANTXV1N4584AUR-1 in DO-213AA package - which retains identical electrical specs and military qualification. Direct replacement requires PCB redesign due to different footprint and thermal path.

What is the maximum reverse leakage current for 1N4584A at 3 V?

The 1N4584A exhibits a maximum reverse leakage current (I_R) of 2.0 µA at 3 V, as specified in the Electrical Characteristics table. This low leakage ensures minimal error contribution in high-impedance reference divider networks and preserves accuracy in battery-powered systems where quiescent current matters.

How does the DO-7 package of 1N4584A support high-reliability applications?

The DO-7 (DO-204AA) package of the 1N4584A features a hermetically sealed glass body and internal metallurgical bonding - preventing moisture ingress, ion migration, and parameter shift over decades of operation. Its construction meets MIL-STD-750 mechanical and environmental test requirements, making it suitable for mission-critical aerospace and defense deployments.

1N4584A Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.4 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 25 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)

1N4584A FAQ

1.How can I place an order for 1N4584A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4584A 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 1N4584A reliable?

The price and inventory of 1N4584A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4584A is usually 5 days.

3.What payment methods are accepted for 1N4584A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4584A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4584A?

1N4584A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4584A 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 1N4584A?

For technical support, including 1N4584A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4584A requirements.

6.How does Aetrix verify that 1N4584A is sourced from the original manufacturer or authorized distributors?

All 1N4584A 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 1N4584A meets industry standards.

7.What is the process for return or replacement of 1N4584A?

All 1N4584A units undergo pre-shipment inspection (PSI). If there is an issue with 1N4584A, 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 1N4584A part is unused and in its original packaging.

Return procedure for 1N4584A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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