RF1404D

The RF1404D is a surface-acoustic-wave (SAW) filter manufactured by RF Monolithics, designed for front-end selectivity in 433.92 MHz receivers. This filter is ideal for European wireless receivers operating under ETSI I-ETS 300 220, commonly found in wireless remote-control and security devices.

Key electrical characteristics include a center frequency of 433.92 MHz, a typical insertion loss of 1.6 dB, and a 3 dB bandwidth ranging from 500 kHz to 800 kHz. The filter provides significant rejection attenuation, with values up to 55 dB in certain bands, helping to suppress spurious responses. Its temperature frequency coefficient is 0.032 ppm/°C², and frequency aging is limited to 10 ppm/yr.

The RF1404D features a compact SM3838-8 package measuring 3.8 x 3.8 mm, making it suitable for space-constrained designs. It is supplied on tape and reel, with standard reel quantities of 500 pieces for 7-inch reels and 3000 pieces for 13-inch reels. The component is RoHS compliant and lead-free.

This coupled-resonator filter (CRF) utilizes advanced SAW design and fabrication technology to achieve high performance with simple external impedance matching. Its typical applications include superhet receivers with 10.7 MHz or 500 kHz IF, direct conversion, and superregen receiver designs.