U441 TO-71 6L ROHS

Overview

The U441 is a monolithic dual N-channel JFET housed in a hermetically sealed TO-71 package. It features tightly matched transistors on a single chip to minimize parasitics and ensure high-frequency performance. The device serves as a direct replacement for the discontinued Siliconix U440, offering superior matching characteristics suitable for demanding test and measurement applications.

Feature Summary

• Monolithic dual design reduces parasitic effects for improved high-frequency operation
• Tightly matched electrical characteristics ensure precision in differential configurations
• Hermetically sealed TO-71 construction provides reliability for military environments

Applications

• Wideband differential amplifiers
• High-speed temperature-compensated single-ended input amplifiers
• High-speed comparators
• Impedance converters
• Vibration detectors

Procurement Notes

Verify that the specific part number matches the Linear Integrated Systems manufacturing origin rather than legacy Siliconix production. Confirm the presence of the ROHS compliance marking if environmental standards are required. Ensure the TO-71 package variant aligns with the 6-pin hermetic seal specification documented for this component type.

Selection Notes

Select this component when tight matching between two N-channel JFETs is critical for circuit symmetry. The monolithic structure is preferred over discrete pairs for high-frequency stability. Consider the hermetic package requirement for harsh environment deployments where standard plastic packages are insufficient.

Part Context

This component belongs to the family of monolithic dual JFETs designed for precision analog signal processing. It replaces older discrete or hybrid solutions by integrating two closely matched devices on a single silicon die, thereby reducing interconnect capacitance and improving overall system bandwidth and linearity.

Replacement Considerations

• Siliconix U440