Microchip Technology 1N4567AE3

Overview

1N4567AE3 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, 200 Ω dynamic impedance, and operation from –65°C to +175°C. It delivers stable voltage reference in precision analog instrumentation requiring minimal drift over temperature.

For engineers reviewing the 1N4567AE3 datasheet, 1N4567AE3 pinout, 1N4567AE3 application, or 1N4567AE3 equivalent, key selection criteria include its ultra-low TC (0.002%/°C), tight 6.4 V nominal tolerance, hermetic DO-7 packaging, military-grade qualification path, and low-power 0.5 mA operating point optimized for stability below 30 mW dissipation.

Technical Context

This device belongs to Microsemi's JEDEC-registered 1N4565–1N4584A-1 series of zero-TC Zener references. Its 6.4 V nominal voltage leverages silicon junction characteristics near the temperature-invariant crossover point, enabling intrinsic compensation without external circuitry.

The 1N4567AE3 is metallurgically bonded within a hermetically sealed glass case and operates with cathode-positive polarity. Its specified TC of ±0.002%/°C applies across 0°C to +75°C, with reverse leakage ≤2.0 µA at 3 V and dynamic impedance measured at 200 Ω under 0.5 mA dc + 0.75 mA ac rms superposition.

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 cathode (banded end) to be biased positive relative to anode for proper Zener conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4567AE3, 1N4567A offers identical performance without RoHS compliance, while 1N4568AE3 improves TC by 2× at same voltage and current-enabling higher-tier stability in calibration-critical systems without changing PCB layout or thermal design.

Availability

1N4567AE3 is available at Aetrix Electronics and suitable for high-reliability applications requiring stable component supply-including precision instrumentation, aerospace avionics, downhole sensing, and military power monitoring systems.

Supply support for 1N4567AE3 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 1N4565–1N4584A-1 series was designed to deliver ultra-stable, temperature-compensated Zener references for mission-critical analog signal chains where long-term drift and environmental resilience are non-negotiable.

FAQ

What is the Zener test current for 1N4567AE3 and why is it important?

The Zener test current for 1N4567AE3 is 0.5 mA, specified per Microsemi's electrical characteristics table. This current establishes the operating point where voltage stability, temperature coefficient, and dynamic impedance are guaranteed. Operating significantly above or below this value increases drift and impedance, compromising reference accuracy-so bias networks must be designed to maintain ~0.5 mA under all conditions.

Does 1N4567AE3 require heatsinking in typical applications?

No, 1N4567AE3 does not require heatsinking in standard use. Its maximum power dissipation is rated at 500 mW, but optimal voltage-temperature stability occurs below 30 mW-achievable at 0.5 mA × 6.4 V = 3.2 mW. Even at worst-case 70 mA surge current, transient heating remains localized and short-lived due to the small DO-7 glass package thermal mass.

How does the E3 suffix affect the 1N4567AE3 compared to older versions?

The E3 suffix on 1N4567AE3 indicates RoHS-compliant, lead-free termination per MIL-STD-1276, with matte tin plating instead of traditional tin-lead. Electrical and thermal specifications remain identical to non-E3 variants, but E3 ensures compatibility with modern Pb-free soldering processes and meets global environmental compliance requirements for new designs.

Can 1N4567AE3 be used in place of 1N4567A in existing designs?

Yes, 1N4567AE3 is a direct drop-in replacement for 1N4567A in terms of electrical performance, package dimensions, and pinout. The only difference is the E3 suffix denoting RoHS-compliant termination-so it can be substituted without layout or schematic changes, provided the assembly process uses Pb-free solder profile and compatible flux chemistry.

What is the meaning of the "A" in 1N4567AE3?

The "A" in 1N4567AE3 denotes the tighter temperature coefficient variant within the 1N4567 family: ±0.002%/°C versus ±0.01%/°C for the base 1N4567. This "A" grade is confirmed in Microsemi's Electrical Characteristics table and applies identically to both E3 and non-E3 versions-ensuring consistent ultra-low-drift performance regardless of termination type.