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Product Detailed Parameters
- Description：CRF,SM,447.700 MHZ
- Series：-
- Mfr：RFMi
- Package：Tape & Reel (TR),Tape & Reel (TR),Bag
- Frequency - Center：447.7MHz
- Bandwidth：840kHz
- Insertion Loss：1.5dB
- Ratings：-
- Applications：Remote Control, Wireless
- Mounting Type：Surface Mount
- Package / Case：8-SMD, No Lead
- Height (Max)：0.055" (1.40mm)
- Size / Dimension：0.150" L x 0.150" W (3.80mm x 3.80mm)
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Overview
The RF1408D is a Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi. It operates at a center frequency of 447.7 MHz with a bandwidth of 840 kHz, designed for remote control and wireless applications. The component features voltage ratings of 12 V and impedances of 221.86 Ohms and 172.02 Ohms. It utilizes coupled-resonator technology to provide suppression typically greater than 40 dB for LO and image spurious responses. The device is housed in an 8-SMD package with SMD/SMT termination types.
Feature Summary
- Utilizes advanced SAW design and fabrication technology for high performance and very low loss
- Employs selective null placement to suppress LO and image spurious responses
- Designed for simple external impedance matching requirements
Applications
- Remote control systems
- Wireless communication applications
- RF signal filtering in receiver front-ends
Procurement Notes
Verify the specific datasheet version from RFMi or authorized distributors to confirm exact electrical parameters and mechanical dimensions. Ensure compatibility with the target PCB layout regarding the 8-SMD footprint. Confirm that the operating temperature range and voltage ratings meet the system requirements before finalizing procurement decisions.
Selection Notes
Select this component when a narrowband filter centered at 447.7 MHz is required for remote control applications. Consider the specific impedance values of 221.86 Ohms and 172.02 Ohms for proper circuit matching. Evaluate the need for high spurious rejection capabilities provided by the coupled-resonator design compared to standard SAW filters.
Part Context
The RF1408D belongs to RFMi's portfolio of surface acoustic wave filters. These components are engineered for RF applications requiring precise frequency selection. The manufacturer utilizes proprietary SAW technology to achieve compact form factors and reliable performance in consumer electronics and industrial wireless devices.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation. Consult RFMi technical support for potential alternatives if supply constraints exist.
