Microchip Technology 1N4584/TR

Overview

1N4584/TR 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 ±5% nominal voltage tolerance. It delivers ultra-stable voltage reference performance across -65°C to +175°C for precision analog instrumentation.

For engineers reviewing the 1N4584/TR datasheet, 1N4584/TR pinout, 1N4584/TR application, or 1N4584/TR equivalent, key selection criteria include its 4.0 mA operating current, hermetically sealed DO-7 package, military-grade qualification path (JANTXV), low TC of 0.0005 %/°C, and suitability for high-reliability voltage reference circuits requiring minimal drift over temperature and time.

Technical Context

This device belongs to Microsemi's JEDEC-registered 1N4565–1N4584A 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 stabilized via dual-junction compensation, achieving TC as low as 0.0005 %/°C at 4.0 mA test current.

The 1N4584/TR operates within a 0 to +75°C temperature range for specified TC performance and maintains ≤2.0 µA reverse leakage at 3 V. Its 25 Ω dynamic impedance at I_ZT = 4.0 mA ensures low noise and high regulation stability under varying load conditions.

Key Specifications

Pinout & Package

DO-7 (DO-204AA) hermetically sealed glass package with axial leads; cathode identified by black band. Leads are tin-lead plated per MIL-STD-750 Method 2026. Weight: 0.2 g. Solderable at 260°C for 10 s max.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4574A/TR and LM399H, the 1N4584/TR uniquely balances ultra-low TC (0.0005 %/°C), high bias current headroom (4.0 mA), and hermetic DO-7 ruggedness-making it optimal for high-reliability analog systems where discrete simplicity, thermal robustness, and military qualification readiness are prioritized over monolithic integration.

Availability

1N4584/TR is available at Aetrix Electronics and suitable for high-reliability voltage reference design, aerospace power monitoring, and downhole sensor calibration requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 1N4584/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 aerospace, defense, and industrial markets.

The 1N4565–1N4584A series was designed specifically to deliver JEDEC-standardized, temperature-compensated Zener references with hermetic packaging and military qualification paths for mission-critical analog infrastructure.

FAQ

What is the Zener test current for 1N4584/TR and why is it important?

The Zener test current for 1N4584/TR is 4.0 mA. This current is critical because it is the exact bias point at which the device achieves its specified 0.0005 %/°C temperature coefficient and 25 Ω dynamic impedance. Operating significantly above or below this current degrades TC performance and increases regulation error, so stable 4.0 mA biasing is essential for achieving datasheet accuracy in the 1N4584/TR.

Does 1N4584/TR have military qualification options?

Yes, the 1N4584/TR base part can be ordered with military qualifications by adding prefixes and suffixes: JANTXV1N4584A-1 meets MIL-PRF-19500/452 Class V requirements, including extended temperature testing, burn-in, and lot traceability. The "-1" suffix denotes compliance with the military specification, and the "A" denotes tighter initial voltage tolerance-both confirmed in Microsemi's official documentation for the 1N4584/TR family.

What is the maximum operating temperature range for 1N4584/TR?

The 1N4584/TR is rated for continuous operation from -65°C to +175°C. This full range is validated per Microsemi's datasheet and applies to both storage and operating conditions. The device maintains its 6.4 V nominal Zener voltage and 0.0005 %/°C TC specification over 0 to +75°C, while the extended range ensures mechanical and electrical integrity in extreme environments such as downhole tools or engine-mounted avionics-key for reliable 1N4584/TR deployment.

How does the DO-7 package of 1N4584/TR differ from DO-35 or DO-213AA alternatives?

The DO-7 (DO-204AA) package used by 1N4584/TR features longer axial leads and a larger glass envelope than DO-35, enabling higher power dissipation (500 mW) and improved thermal mass for stable TC performance. Unlike surface-mount DO-213AA variants (e.g., JANTX1N4569AUR-1), the DO-7 supports through-hole mounting with proven vibration resistance-making the 1N4584/TR preferred for high-shock aerospace and industrial applications where lead integrity is mission-critical.

Can 1N4584/TR be used as a direct replacement for 1N4574A/TR?

No, 1N4584/TR is not a direct replacement for 1N4574A/TR due to differing Zener test currents: 1N4584/TR requires 4.0 mA, while 1N4574A/TR is optimized for 1.0 mA. Substituting them without adjusting bias circuitry will cause significant TC degradation and increased dynamic impedance in the 1N4584/TR. To use 1N4584/TR in place of 1N4574A/TR, the series resistor must be recalculated to deliver 4.0 mA at the target supply voltage-otherwise, the 1N4584/TR will not meet its published specifications.