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Product Detailed Parameters
- Description：DIODE VHF VAR CAP 30V SOD523
- Series：-
- Mfr：NXP USA Inc.
- Package：Tape & Reel (TR)
- Capacitance @ Vr, F：1.055pF @ 28V, 1MHz
- Capacitance Ratio：16
- Capacitance Ratio Condition：C0.5/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：SOD-523
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Overview
The BB181,135 is a VHF variable capacitance diode fabricated in planar technology and encapsulated in the SOD523 (SC-79) ultra-small plastic surface-mounted device package. It features excellent linearity and a capacitance ratio of 14 between 0.5V and 28V reverse bias. The device operates with a maximum reverse voltage of 30V and a forward current limit of 20mA. At 1MHz, capacitance ranges from 17pF at 0.5V to 1.055pF at 28V. Series resistance is specified as 3Ω at 470MHz with 9pF capacitance.
Feature Summary
- Excellent linearity for precise tuning applications
- Ultra-small plastic SMD package for space-constrained designs
- High capacitance variation ratio across operating voltage range
Applications
- Electronic tuning in satellite tuners
- Tunable coupling circuits
- Voltage Controlled Oscillators (VCO)
Procurement Notes
Verify the component marking code 'N' on the SOD523 package to confirm authenticity. Ensure the ordering suffix matches the specific tape-and-reel or cut-tape configuration required by your assembly process. Cross-reference the latest NXP data sheet revision to confirm current production status and any potential obsolescence notices before finalizing procurement orders.
Selection Notes
Select this component for VHF frequency applications requiring high linearity and compact form factors. Evaluate the capacitance-voltage characteristics against the specific tuning range requirements of the target circuit. Consider the low series resistance at higher frequencies when designing high-Q resonant circuits or oscillators where signal integrity is critical.
Part Context
The BB181 belongs to NXP's portfolio of VHF variable capacitance diodes designed for RF tuning applications. It utilizes planar technology to achieve consistent performance in small surface-mount packages. This family of components supports various electronic tuning needs where adjustable capacitance is essential for frequency control and impedance matching.
Replacement Considerations
Consult official NXP documentation for qualified substitute part numbers. Verify pinout compatibility and electrical specifications such as capacitance ratios and breakdown voltages before substituting.
