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Product Detailed Parameters
- Description：DIODE VHF VAR CAP DUAL SOT23
- Series：-
- Mfr：NXP USA Inc.
- Package：Tape & Reel (TR)
- Capacitance @ Vr, F：46.5pF @ 2V, 1MHz
- Capacitance Ratio：1.75
- Capacitance Ratio Condition：C2/C8
- Voltage - Peak Reverse (Max)：18 V
- Diode Type：1 Pair Common Cathode
- Q @ Vr, F：-
- Operating Temperature：-55°C ~ 125°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23 (TO-236AB)
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Overview
The BB804,215 is a VHF variable capacitance double diode with a common cathode, fabricated in planar technology and encapsulated in the SOT-23 small plastic surface-mount package. It features a selected capacitance range with C8 at 26 pF and a ratio of 1.7. The device offers low series resistance, specified at 0.2 Ω at 100 MHz. Key electrical characteristics include a continuous reverse voltage of 18 V per diode and a junction temperature range from -55 °C to +125 °C. At 2 V reverse bias and 1 MHz, the diode capacitance typically ranges from 42 pF to 46.5 pF.
Feature Summary
- VHF variable capacitance double diode with common cathode configuration
- Low series resistance for efficient signal handling
- Small plastic SMD package for compact integration
Applications
- Electronic tuning in FM radio applications
Procurement Notes
Verify component authenticity by checking the marking code '16*' on the SOT-23 package against official Philips/NXP documentation. Confirm the specific suffix matches the required manufacturing origin, as codes indicate production in Hong Kong, Malaysia, or China. Ensure the datasheet version aligns with current design requirements before procurement.
Selection Notes
Select this component for VHF tuning circuits requiring a common cathode double diode structure. Consider the 18 V continuous reverse voltage limit and the typical capacitance range of 42–46.5 pF at 2 V. Evaluate the low series resistance of 0.2 Ω at 100 MHz for high-frequency performance needs in FM radio designs.
Part Context
The BB804 is a VHF variable capacitance double diode produced by Philips Semiconductors, now NXP. It utilizes planar technology within an SOT-23 package. The device is designed for electronic tuning applications, specifically targeting FM radio systems where stable variable capacitance is required.
Replacement Considerations
Consult official replacement lists for equivalent VHF varactor diodes with common cathode configurations. Verify that substitute components match the SOT-23 package dimensions and meet the 18 V reverse voltage and capacitance ratio specifications.
FAQ
What is the pin configuration for the BB804?
Pin 1 is Anode (A1), Pin 2 is Anode (A2), and Pin 3 is the Common Cathode.
What is the maximum continuous reverse voltage per diode?
The maximum continuous reverse voltage is 18 V per diode.
What is the typical diode capacitance at 2 V reverse bias?
At 2 V reverse bias and 1 MHz frequency, the typical diode capacitance ranges from 42 pF to 46.5 pF.
