BB 545 E7908

Overview

The BB 545 E7908 is a silicon varactor diode manufactured by Infineon Technologies, designed for voltage-controlled capacitance applications. It features a single configuration housed in an SCD-80 surface-mount package. The device supports a peak reverse voltage of 30 V and operates within a temperature range of -55°C to +150°C junction temperature. Key electrical parameters include a capacitance of 18.5 pF at zero bias and a minimum tuning ratio of 9. The component is supplied in reel packaging with a standard factory quantity of 3000 units.

Feature Summary

• Voltage-variable capacitance functionality for electronic tuning circuits
• High thermal stability suitable for demanding operating environments
• Compact surface-mount design for automated assembly

Applications

• Frequency modulation circuits
• Voltage-controlled oscillators (VCOs)
• RF tuning networks

Procurement Notes

Verify the specific suffix E7908 against official Infineon documentation to confirm packaging and tape-and-reel specifications. Confirm end-of-life status through authorized distributors as availability may be limited. Ensure compatibility with existing PCB footprints designated for the SCD-80 package type during procurement planning.

Selection Notes

Select this component when a single varactor diode with a 30 V reverse voltage rating is required. Verify that the 18.5 pF baseline capacitance and minimum tuning ratio of 9 meet the circuit's frequency range requirements. Ensure the design accommodates the SCD-80 surface-mount footprint and operates within the specified -55°C to +150°C junction temperature limits.

Part Context

The BB 545 belongs to Infineon's broader family of silicon varactor diodes, which are specialized semiconductor devices used primarily in radio frequency and communication systems. These components allow for precise control of resonant frequencies through applied voltage changes, serving as critical elements in tunable filters and oscillator designs.