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Product Detailed Parameters
- Description：DIODE VAR CAP 30V 20MA SC-79
- Series：-
- Mfr：Infineon Technologies
- Package：Tape & Reel (TR)
- Capacitance @ Vr, F：2.3pF @ 28V, 1MHz
- Capacitance Ratio：9.8
- Capacitance Ratio Condition：C1/C28
- Voltage - Peak Reverse (Max)：30 V
- Diode Type：Single
- Q @ Vr, F：-
- Operating Temperature：-55°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-79, SOD-523
- Supplier Device Package：PG-SC79-2
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Overview
The BB55502VE7908XT is a silicon tuning diode from the BB535/BB555 series, designed for UHF-TV tuners. It features a single diode configuration in an SC79 package with a low series inductance of 0.6 nH and series resistance of 0.75 Ω maximum at 470 MHz. The device supports a reverse voltage of 30 V and a peak reverse voltage of 35 V. Electrical characteristics include a capacitance ratio (CT1/CT28) of 8.2 to 9.8 and a capacitance ratio (CT2/CT25) of 6 to 7.5 at 1 MHz. Operating temperature ranges from -55 °C to +150 °C.
Feature Summary
- High capacitance ratio suitable for wide tuning range applications
- Low series inductance and resistance for improved RF performance
- Excellent uniformity and matching due to "in-line" matching assembly procedure
Applications
- UHF-TV tuners
Procurement Notes
Verify component authenticity by checking markings against official Infineon documentation. Confirm package type matches SC79 specifications. Ensure compliance with RoHS standards as indicated in the datasheet. Validate date codes using the provided CES-code table. Contact authorized distributors for availability status.
Selection Notes
Select this component when designing UHF-TV tuner circuits requiring high capacitance ratios and low parasitic inductance. Consider the SC79 package dimensions for PCB layout constraints. Evaluate thermal management requirements given the operating temperature range up to 150 °C. Verify that the forward current rating of 20 mA meets circuit demands.
Part Context
This part belongs to the BB535/BB555 series of silicon tuning diodes manufactured by Infineon Technologies. The series includes variants like BB535, BB555, and BB555-02V, each offering specific package and electrical characteristics optimized for television tuner applications. The BB55502VE7908XT specifically utilizes the SC79 package format.
Replacement Considerations
Direct substitutes within the same series include BB555 and BB555-02V, which share similar electrical characteristics but may differ in package type (SCD80 or SC79). Cross-referencing with BB535 is possible if SOD323 packaging is acceptable. Verify pinout compatibility and physical dimensions before substitution.
