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Product Detailed Parameters
- Description：RF MOSFET
- Series：*
- Mfr：NXP Semiconductors
- Package：Bulk
- Technology：-
- Frequency：-
- Gain：-
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- Current Rating (Amps)：-
- Noise Figure：-
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- Voltage - Rated：-
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Overview
The BF1108,215 is a silicon RF switch from NXP Semiconductors, housed in an SOT143B package. It integrates a depletion-type Field-Effect Transistor (FET) with a band-switching diode to achieve low insertion loss and high isolation up to 1 GHz. The device features integrated protection diodes between the gate-source and gate-drain terminals to safeguard against excessive input voltage surges. By isolating the MOSFET gate from ground via the diode, the component maintains minimal signal attenuation during operation.
Feature Summary
- Combines a depletion-type FET with a band-switching diode for optimized RF switching performance
- Provides low insertion loss and high isolation capabilities within the specified frequency range
- Includes integrated gate-to-source and gate-to-drain diodes for surge protection
Applications
- Passive loop through circuits for VCR tuners
- Transceiver switching modules
- General RF switching applications up to 1 GHz
Procurement Notes
Verify the specific ordering code suffix to confirm the exact package variant, as the BF1108 family includes both SOT143B and SOT143R options. Ensure compatibility with the intended PCB footprint before procurement. Confirm that the component meets all required environmental standards for the target deployment environment.
Selection Notes
Select this component when designing circuits requiring reliable RF signal routing with minimal power consumption. The integrated protection diodes simplify design by eliminating external surge protection components. Consider the SOT143B package dimensions for board space constraints. Evaluate the 1 GHz operational limit against the system's maximum operating frequency.
Part Context
This part belongs to NXP's discrete semiconductor portfolio focused on radio frequency applications. It serves as a compact solution for managing signal paths in consumer electronics and communication devices. The integration of FET and diode technologies allows for efficient signal control without complex biasing networks.
Replacement Considerations
Check for BF1108R if the SOT143R package is required instead of the standard SOT143B. Verify pinout compatibility with existing designs before substituting with other RF switches from different manufacturers.
