1N6639

Overview

The Microchip Technology 1N6639 is a small signal switching diode designed for high-speed computer and signal applications. It features a maximum DC reverse voltage of 75 V and an average rectified forward current of 300 mA. The device exhibits a low forward voltage drop of 1.2 V at 300 mA and a rapid reverse recovery time of 4 ns. Reverse leakage current is limited to 100 nA at the rated voltage. It operates within a junction temperature range of -65°C to +175°C and is available in surface mount D-5B packages.

Feature Summary

• Fast switching capability with 4 ns reverse recovery time
• Hermetic glass package construction for reliability
• Wide operating temperature range suitable for extreme environments

Applications

• High-speed computer logic circuits
• Signal processing applications
• Military and aerospace electronic systems

Procurement Notes

Verify the specific ordering suffix (e.g., US, TR) to confirm package type and reel configuration. Confirm military qualification status such as JAN or JANTX if required by design specifications. Check RoHS compliance status as standard versions may not meet environmental directives. Validate datasheet revisions before finalizing procurement to ensure parameter consistency.

Selection Notes

Select this component when fast switching speed and low capacitance are critical for signal integrity. The 75 V rating suits low-voltage logic interfaces. Consider the D-5B package for space-constrained surface mount designs. Ensure thermal management supports the specified junction temperature limits during operation.

Part Context

The 1N6639 belongs to the MIL-PRF-19500/609 qualified switching diode family. It serves as a ruggedized alternative to commercial equivalents for defense and industrial sectors. The device is part of a broader series including variants like 1N6638 and 1N6640, differentiated primarily by reverse voltage ratings.

Replacement Considerations

• JAN1N6639US
• JANTX1N6639US