MS1579

Overview

The MS1579 is a gold metallized, epitaxial silicon NPN transistor designed for RF applications. It features a collector-emitter breakdown voltage of 25V and operates at frequencies up to 860MHz. The component is packaged in the M156 configuration.

Feature Summary

• Gold metallized epitaxial silicon construction
• NPN transistor type optimized for RF use

Applications

• Class A television transmitter applications
• UHF television transmitter circuits
• Band IV and V television transmitter circuits

Procurement Notes

Verify current availability status as the part may be obsolete or discontinued. Confirm package compatibility with existing designs. Check for valid replacement options if sourcing new units is not feasible. Ensure supplier documentation matches the original Microsemi specifications.

Selection Notes

Select this component for UHF and Band IV/V television transmitter designs requiring Class A operation. Verify that the 25V breakdown voltage meets circuit requirements. Consider the M156 package constraints during layout planning.

Part Context

The MS1579 belongs to the Microsemi (now Microchip) portfolio of bipolar RF transistors. It serves specialized analog and RF roles in broadcast infrastructure. The product line focuses on high-reliability semiconductor solutions for aerospace and communications sectors.

Replacement Considerations

MS1579 is listed as obsolete. No specific substitute part numbers are confirmed in public documentation.