RF1304

® RF1304 391.250 MHz SAW Filter Ideal Front-End Filter for European Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package The RF1304 is a low-loss, compact and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 391.250 MHz receivers. Typical applications of these FSK receivers are wireless remote-control and security devices operating in Europe. RFM’s advanced SAW design and fabrication technology is utilized to achieve high performance and very low loss with simple external impedance matching (not included). Quartz construction provides excellent frequency stability over a wide temperature range. TO39-3 Case Electrical Characteristics Characteristic Nominal Frequency Insertion Loss 4 dB Passband 3 dB Reject Band Rejection at fC ±1.50 MHz at fC ±6.0 MHz at fC ±50 MHz Temperature Operating Case Temperature Turnover Temperature Turnover Frequency Frequency Temperature Coefficient Frequency Aging External Impedance Absolute Value during the First Year Series Inductance Shunt Capacitance Lid Symbolization (in addition to Lot and/or Date Codes) TC TO fO FTC IfAI L C 1, 7 3, 7, 8 3 4 -40 15 25 fC 0.032 10 22 5-18 RFM RF1304 +85 40 Sym fC IL BW3 BW3 Notes 2, 4, 5, 6 3, 4, 7 2, 3, 4, 7 2, 3, 4, 7 10 25 dB °C °C MHz ppm/°C2 ppm/yr nH pF ±30 Minimum Typical 391.250 4.0 Maximum Units MHz dB kHz kHz CAUTION: Electrostatic Sensitive Device. Observe precautions for ...