Microchip Technology 1N4567E3

Overview

1N4567E3 from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 0.5 mA test current, ±0.002 %/°C temperature coefficient (±0.13 mV/°C), 200 Ω dynamic impedance, and operating temperature range of –65 °C to +175 °C. It delivers high-stability voltage referencing in precision instrumentation and aerospace power supply feedback loops.

For engineers reviewing the 1N4567E3 datasheet, 1N4567E3 pinout, 1N4567E3 application, or 1N4567E3 equivalent, key selection criteria include its ultra-low TC specification, hermetic glass packaging, MIL-PRF-19500/452 qualification readiness, and compatibility with legacy 1N45xx reference designs requiring <0.2 mV/°C drift.

Technical Context

This device belongs to Microsemi's zero-temperature-coefficient Zener family optimized for minimal voltage drift across wide thermal excursions. Its 6.4 V nominal Zener voltage leverages silicon bandgap compensation techniques to achieve TC as low as ±0.002 %/°C over 0 °C to +75 °C.

The 1N4567E3 operates at 0.5 mA Zener test current (IZT), exhibits 200 Ω dynamic impedance (ZZT), and maintains reverse leakage ≤2 µA at 3 V - all specified at 25 °C per JEDEC registration. Its DO-7 package supports axial through-hole mounting with tin-lead solderable leads compliant with MIL-STD-750 Method 2026.

Key Specifications

Pinout & Package

DO-7 (DO-204AA) glass axial-leaded package with cathode band marking. Leads are tin-lead plated and solderable per MIL-STD-750 Method 2026. Polarity requires banded end to be positive relative to unbanded end during operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4567A and LM399H, the 1N4567E3 offers the best balance of ultra-low TC, passive simplicity, hermetic reliability, and DO-7 compatibility - making it the preferred choice for embedded military, aerospace, and industrial systems where size, power, and long-term drift matter more than sub-ppm initial accuracy.

Availability

1N4567E3 is available at Aetrix Electronics and suitable for high-reliability power supply feedback, precision instrumentation calibration, and aerospace sensor signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 1N4567E3 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 1N4567E3 belongs to Microsemi's legacy 1N45xx series of temperature-compensated Zener reference diodes, engineered specifically for applications demanding minimal voltage drift across extreme thermal environments without active circuitry.

FAQ

What is the Zener test current for 1N4567E3 and why is it important?

The 1N4567E3 is characterized at a Zener test current (IZT) of 0.5 mA. This specific bias point ensures the device achieves its guaranteed ±0.002 %/°C temperature coefficient and 200 Ω dynamic impedance. Operating significantly above or below 0.5 mA increases TC deviation and impedance, degrading reference stability in precision circuits. The 1N4567E3 must be biased near this current for datasheet performance.

Does 1N4567E3 meet military specifications out of the box?

No - the base 1N4567E3 is a commercial-grade part. However, it is designed to the same electrical and mechanical specifications as the MIL-PRF-19500/452 qualified versions. To obtain military screening, order with prefixes like JANTX1N4567E3-1 or JANTXV1N4567E3-1. These variants undergo additional environmental testing and lot traceability but retain identical 1N4567E3 electrical behavior and DO-7 packaging.

Can 1N4567E3 replace older 1N4567 or 1N4567A parts in existing designs?

Yes - the 1N4567E3 is a direct form-fit-function replacement for 1N4567 and 1N4567A in DO-7 packages. It shares identical Zener voltage (6.4 V), test current (0.5 mA), temperature coefficient (±0.002 %/°C), dynamic impedance (200 Ω), and mechanical dimensions. No PCB or schematic changes are required when upgrading to 1N4567E3 for improved supply chain availability or consistency.

What is the maximum power dissipation rating for 1N4567E3?

The 1N4567E3 has a maximum DC power dissipation of 500 mW at lead temperature (TL) = 25 °C. However, for optimal voltage-temperature stability, Microsemi recommends limiting power dissipation to <30 mW - achieved by biasing near its 0.5 mA IZT. Exceeding this lower power level increases self-heating, which introduces measurable TC error and compromises the 1N4567E3's ultra-low-drift advantage.

Is 1N4567E3 sensitive to electrostatic discharge (ESD)?

No - the 1N4567E3 is nonsensitive to ESD per MIL-STD-750 Method 1020. Its robust glass-encapsulated structure and metallurgical bonding eliminate the need for special ESD handling procedures during board assembly or field service. This makes the 1N4567E3 particularly suitable for high-mix manufacturing environments and repair depots where ESD controls may be inconsistent.