BB 689 E7903

Overview

The BB 689 E7903 is a silicon tuning diode manufactured by Infineon Technologies, classified as a varactor diode. It features a single configuration housed in an SCD-80 surface-mount package. The component supports a maximum reverse voltage of 30 V and operates within a temperature range of -55 °C to +150 °C. Key electrical parameters include a capacitance of 51 pF and a minimum tuning ratio of 18, measured under test conditions of 1 V / 28 V.

Feature Summary

• Utilizes silicon technology for stable tuning performance
• Designed for surface-mount assembly via the SCD-80 package
• Capable of operating at elevated junction temperatures up to 150 °C

Applications

• RF circuit tuning
• Frequency modulation applications
• Voltage-controlled oscillator designs

Procurement Notes

This component is listed as obsolete or end-of-life by the manufacturer. Availability is restricted, and it may not be sold in all regions through standard distribution channels. Engineers should verify current stock status with authorized suppliers and consider long-term supply constraints when planning production. Alternative sourcing strategies or lifecycle management reviews are recommended due to the discontinued status.

Selection Notes

Select this part only if the specific SCD-80 footprint and 30 V reverse voltage rating align with the design requirements. Verify that the 51 pF capacitance and 18 tuning ratio meet the circuit's frequency coverage needs. Ensure the PCB layout accommodates the small surface-mount package dimensions and thermal characteristics defined in the official datasheet.

Part Context

The BB 689 series represents Infineon's lineup of silicon varactor diodes intended for RF and microwave applications. This specific variant belongs to the broader family of tuning components used in communication systems. The E7903 suffix denotes specific binning or packaging variations within the standard BB 689 product line, distinguishing it from other pin-compatible or functionally similar devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct replacements must be identified through independent cross-reference tools or by consulting updated Infineon selection guides for active varactor diodes with matching electrical specifications.