1N4573A/TR

Single Zener Diodes Overview

The Microchip Technology 1N4573A/TR is a temperature-compensated Zener reference diode with a nominal voltage of 6.4 V. It operates at a test current (IZT) of 1.0 mA and features a maximum temperature coefficient of 0.001%/°C (0.06 mV/°C). The device is housed in a hermetically sealed glass DO-7 (DO-204AA) axial-leaded package. Electrical characteristics include a maximum reverse current of 2.0 µA at 3 V and a dynamic impedance of 100 Ω at IZT. The operating temperature range extends from -55°C to +100°C.

Single Zener Diodes Feature Summary

• Provides minimal voltage change over a broad operating temperature range for instrumentation applications
• Internal metallurgical bonding ensures structural integrity
• Flexible axial-leaded mounting terminals facilitate through-hole integration
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• Instrumentation circuits requiring stable voltage references
• Circuit designs demanding low voltage drift across temperature variations
• Precision measurement systems utilizing zero-TC reference diodes

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against official Microsemi documentation before ordering. Confirm that the TR suffix aligns with tape-and-reel specifications per EIA-296 standards. Ensure the selected part number matches the required military or commercial qualification levels if applicable. Cross-reference the JEDEC registration number to confirm component authenticity and electrical parameter compliance.

Single Zener Diodes Selection Notes

Select this component when a 6.4 V reference with a 0.001%/°C temperature coefficient is required. The 1.0 mA test current setting offers a balance between power dissipation and stability. Consider the DO-7 package constraints for board space. Evaluate the 100 Ω dynamic impedance against circuit sensitivity requirements. Verify that the -55°C to +100°C operating range meets environmental specifications.

Single Zener Diodes Part Context

This device belongs to the 1N4565 thru 1N4584A series of Zero-TC Reference Diodes manufactured by Microsemi's Scottsdale Division. The series provides nominal 6.4 V outputs with varying temperature coefficients and test currents. The 1N4573A variant specifically targets applications needing tighter thermal stability than higher coefficient options while maintaining lower power consumption than 2.0 mA or 4.0 mA variants.

Single Zener Diodes Replacement Considerations

Equivalent parts within the 1N4565-1N4584A series may be substituted if they match the 1.0 mA test current and 0.001%/°C coefficient. Military equivalents require JAN, JANTX, or JANTXV prefixes with the -1 suffix. Surface mount replacements are available in DO-213AA packages using the UR-1 suffix.