Microchip Technology 1N4567A/TR

Overview

1N4567A/TR from Microsemi is a hermetically sealed, glass axial-leaded, temperature-compensated Zener reference diode with nominal 6.4 V output, ±5% tolerance, 0.002%/°C temperature coefficient, 0.5 mA Zener test current, and DO-7 (DO-204AA) package. It delivers ultra-stable voltage reference in precision instrumentation requiring minimal drift over -55°C to +100°C operating range.

For engineers reviewing the 1N4567A/TR datasheet, 1N4567A/TR pinout, 1N4567A/TR application, or 1N4567A/TR equivalent, key selection factors include its low TC (0.002%/°C), tight thermal stability at 0.5 mA I_ZT, DO-7 mechanical robustness, MIL-PRF-19500/452 qualification readiness, and TR tape-and-reel packaging for automated assembly.

Technical Context

This device belongs to the 1N4565–1N4584A-1 series of zero-TC Zener references engineered using internal metallurgical bonding to minimize voltage drift. Its 6.4 V nominal Zener voltage is optimized for temperature compensation via dual-junction design, achieving 0.002%/°C TC over -55°C to +100°C.

It operates at 0.5 mA test current (I_ZT) with 200 Ω dynamic impedance (Z_ZT), 2.0 µA max reverse leakage at 3 V, and is rated for 500 mW power dissipation at 25°C lead temperature. The DO-7 package supports soldering up to 260°C for 10 s and meets MIL-STD-750 Method 1020 for ESD immunity.

Key Specifications

Pinout & Package

DO-7 (DO-204AA) hermetically sealed glass package with axial leads; cathode identified by band; 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 1N4567 and 1N4568A/TR, the 1N4567A/TR offers the optimal trade-off of ±5% initial tolerance, 0.002%/°C TC, and broad military qualification support-making it preferred for aerospace and industrial instrumentation where repeatability and supply assurance outweigh marginal TC improvements.

Availability

1N4567A/TR is available at Aetrix Electronics and suitable for high-reliability instrumentation, aerospace sensor conditioning, and military power supply trimming requiring stable component supply and traceable sourcing.

Supply support for 1N4567A/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 defense, aerospace, and industrial markets.

The 1N4565–1N4584A-1 series was designed specifically for precision voltage reference applications demanding ultra-low temperature coefficients and hermetic reliability in extended temperature environments.

FAQ

What is the Zener test current (I_ZT) for the 1N4567A/TR?

The 1N4567A/TR is characterized at a Zener test current of 0.5 mA, as specified in the Electrical Characteristics table. This current establishes the conditions under which the 6.4 V nominal voltage and 0.002%/°C temperature coefficient are guaranteed. Operating the 1N4567A/TR significantly above or below this current may increase dynamic impedance and degrade TC performance.

Does the 1N4567A/TR have military qualification options?

Yes - the 1N4567A/TR base part can be ordered with JAN, JANTX, or JANTXV prefixes plus the "-1" suffix (e.g., JANTX1N4567A-1) to meet MIL-PRF-19500/452 requirements. These variants undergo additional screening including temperature cycling, burn-in, and lot acceptance testing, while retaining identical electrical specs and DO-7 packaging.

What does the "TR" suffix indicate in 1N4567A/TR?

The "TR" suffix denotes EIA-296 compliant tape-and-reel packaging, enabling automated pick-and-place assembly despite the axial-leaded DO-7 form factor. This configuration includes standardized carrier tape, cover tape, and reel dimensions - critical for high-volume manufacturing of ruggedized instrumentation and avionics modules using the 1N4567A/TR.

How does the temperature coefficient of 0.002%/°C translate to voltage drift?

At 6.4 V nominal, a 0.002%/°C TC equates to approximately 0.13 mV/°C drift. Over a -55°C to +100°C operating range (155°C span), total drift is ≤ ±20 mV - well within the ±320 mV (±5%) initial tolerance band. This ensures monotonic, predictable behavior without inflection points across the full military temperature range.

Is the 1N4567A/TR compatible with lead-free soldering processes?

No - the 1N4567A/TR features tin-lead plated leads per MIL-STD-750 Method 2026 and is rated for maximum solder temperature of 260°C for 10 seconds. Lead-free reflow profiles typically exceed 260°C (e.g., SAC305 peak ~245–260°C with longer dwell), risking glass-to-metal seal integrity. For RoHS-compliant designs, consult Microchip's qualified alternatives or derate accordingly.