RFM products are now Murata products. RF1408D • • • • Ideal Front-End Filter for Domestic Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Complies with Directive 2002/95/EC (RoHS) 447.7 MHz SAW Filter Pb The RF1408D is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 447.7 MHz receivers. Receiver designs using this filter include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of these receivers are wireless remotecontrol and security devices (especially for automotive keyless entry) operating in the USA under FCC Part 15, in Canada under RSS-210, and in Italy This coupled-resonator filter (CRF) uses selective null placement to provide suppression, typically greater than 40 dB, of the LO and image spurious responses of superhet receivers with 10.7 MHz IF. RFM’s advanced SAW design and fabrication technology is utilized to achieve high performance and very low loss with simple external impedance matching. Characteristic Sym Notes fc 1, 2, 3 Insertion Loss ILMIN 1, 3 3 dB Bandwidth BW3 1, 3 Center Frequency at 25°C Absolute Frequency Rejection Attenuation: (relative to ILmin) 500 2.0 dB 1100 kHz 60 55 434 - 443 MHz 33 35 443 - 445 MHz 20 33 445 - 446.7 MHz 9 12 9 15 449.7 - 456 MHz 16 20 456 - 458 MHz 31 38 458 - 487 MHz 38 40 487 - 1000 MHz 39 55 FTC Absolute Value during the First Year lfAl Impedance @ fc Input ZIN=RINllCIN ZIN Output ZOUT=ROUTllCOUT ZOUT 5 1 Lid Symbolization (Y=year WW=week S=shift) MHz 1.5 45 Freq. Temp. Coefficient Units 840 40 1, 3 Maximum 447.7 10 - 409 MHz Frequency Aging Standard Reel Quantity Typical 409 - 434 MHz 448.7 - 449.7 MHz Temperature Minimu m SM3838-8 Case 3.8 x 3.8 dB 0.032 ppm/°C2 ≤10 ppm/yr 221.86Ω // 1.25pf 172.02Ω // 126.49fF 511 // YWWS Reel Size 7 Inch 9 Reel Size 13 Inch 500 Pieces/Reel 3000 Pieces/Reel CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. 2. 3. 4. 5. 6. 7. 8. 9. Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50 Ω test system with VSWR ≤ 1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, fc. Note that insertion loss and bandwidth and passband shape are dependent on the impedance matching component values and quality. The frequency fc is defined as the midpoint between the 3dB frequencies. Where noted specifications apply over the entire specified operating temperature range of -40°C to +90°C. The turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fo. The nominal frequency at any case temperature, Tc, may be calculated from: f = fo [1 - FTC (To - Tc)2]. Frequency aging is the change in fc with time and is specified at +65°C or less. Aging may exceed the specification for prolonged temperatures above +65°C. Typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years. The design, manufacturing process, and specifications of this device are subject to change. One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. Tape and Reel Standard Per ANSI / EIA 481. ©2010-2015 by Murata Electronics N.A., Inc. RF1408D (R) 4/6/15 Page 1 of 2 www.murata.com Rating Input Power Level DC Voltage Value Units 10 dBm 12 VDC Storage Temperature -40 to +125 °C Operable Temperature Range -40 to +125 °C 260 °C Soldering Temperature (10 seconds / 5 cycles Max.) Electrical Connections Pin Connection 1 Input 2 Input Ground 3 Input Ground 4 Case Ground 5 Output 6 Output Ground 7 Output Ground 8 Case Ground A E C B 8 8 1 7 H 7 1 2 6 6 2 3 5 5 3 G 4 4 D F Matching Circuit to 50Ω Case Dimensions 7 6 Output 10nH 22nH 5 1 8 4 2 22nH 7.5nH Input mm Dimension 6.8pF 3 A B C D E F G H 6.8pF Optional Inches Min Nom Max Min Nom Max 3.6 3.6 1.00 0.95 0.90 0.50 2.39 1.40 3.8 3.8 1.20 1.10 1.0 0.6 2.54 1.75 4.0 4.0 1.40 1.25 1.10 0.70 2.69 2.05 0.14 0.14 0.04 0.033 0.035 0.020 0.090 0.055 0.15 0.15 0.05 0.043 0.04 0.024 0.100 0.069 0.16 0.16 0.055 0.05 0.043 0.028 0.110 0.080 Electrical Connections Matching Circuit to 50Ω Pin Connection 1 Input Ground 2 Input 3 Input Ground 4 Case Ground 5 Output Ground 6 Output 7 Output Ground 8 Case Ground ©2010-2015 by Murata Electronics N.A., Inc. RF1408D (R) 4/6/15 7 Output 10nH 6.8pF Page 2 of 2 22nH 6 5 1 8 4 2 3 22nH 7.5nH Input 6.8pF www.murata.com