BFM505,115

Overview

The BFM505,115 is a dual NPN wideband transistor housed in a surface-mount SOT363 (S-mini) package. It integrates two silicon NPN RF dies designed for GHz-range applications. Key electrical parameters include a transition frequency of 9 GHz at IC = 5 mA and VCE = 3 V. At 900 MHz with IC = 5 mA and VCE = 3 V, the device provides an insertion power gain of 14 to 15 dB and a maximum unilateral power gain of 17 dB. The noise figure ranges from 1.1 dB to 1.8 dB depending on collector current. Limiting values specify a collector-base voltage of 20 V, collector-emitter voltage of 8 V, and total power dissipation up to 500 mW.

Feature Summary

• Dual NPN configuration with temperature and hFE matching for balanced circuit performance.
• Gold metallization construction ensuring high reliability in RF environments.
• Low noise figure combined with high gain characteristics optimized for low current operation.

Applications

• Oscillator and buffer amplifiers
• Balanced amplifiers
• LNA/mixer circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest product specification to confirm package orientation and tape reel specifications. Ensure the component status aligns with current production requirements, as discrete semiconductor availability may vary. Cross-reference the datasheet revision date to guarantee compatibility with design constraints before finalizing procurement orders.

Selection Notes

Select this component for designs requiring matched dual transistors in compact surface-mount layouts. Evaluate thermal resistance limits relative to the expected soldering point temperature to ensure safe power dissipation. Confirm that the operating voltage and current levels remain within the specified absolute maximum ratings to prevent device degradation or failure during operation.

Part Context

This part belongs to NXP's portfolio of discrete semiconductors focused on radio frequency front-end solutions. It complements other wideband transistors like the BFS505 and BFG505 series, offering a dual-die alternative for space-constrained mobile and communication equipment designs requiring precise signal processing capabilities.

Replacement Considerations

Direct replacements are not explicitly listed in the provided documentation. Designers should evaluate single-transistor alternatives such as the BFS505 or BFG505 if dual configurations are not strictly required, ensuring pinout compatibility and RF performance metrics meet the original design specifications.

FAQ

What is the transition frequency of the BFM505?

The transition frequency is 9 GHz when measured at a collector current of 5 mA and a collector-emitter voltage of 3 V.

What is the maximum unilateral power gain at 900 MHz?

The maximum unilateral power gain is typically 17 dB under conditions of IC = 5 mA, VCE = 3 V, and Tamb = 25 °C.

How many leads does the SOT363 package contain?

The SOT363 package contains six leads, housing two separate NPN transistor dies with shared emitter connections.