RFM products are now Murata products. RF1112C Ideal Front-End Filter for Domestic Wireless Receivers Pb Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Complies with Directive 2002/95/EC (RoHS) 315.0 MHz SAW Filter The RF1211C is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 315.0 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 remote-control 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. Muratas advanced SAW design and fabrication technology is utilized to achieve high performance and very low loss with simple external impedance matching. SM5050-8 Case 5 x 5 Item Minimum Typical Maximum Note Center Frequency 25C F (MHz) -315 - 1, 2 C Minimum I.L. (314.82~315.22 MHz) (dB) IL min -2.0 5.0 1 Pass band (relative to IL ) min 314.77~315.2 MHz (dB) - 1.5 3.0 1 314.71~315.26 MHz (dB) - 2.0 6.0 Pass bandwidth (relative to IL ) BW (KHz) 1 800 860 - min 3 Attenuation: (relative to IL ) (dB) min 10~270 MHz (dB) 45 55 - 270~309 MHz (dB) 30 35 - 1 309~313.94 MHz (dB) 15 20 - 316~335 MHz (dB) 10 15 - 335~400 MHz (dB) 35 42 - 400~1000 MHz (dB) 45 60 - Impedance at F Input Z =R //C 344 // 4.9 pF C IN IN IN 1 Output Z =R //C 344 // 4.9 pF OUT OUT OUT Turnover To (deg.C) 25 typ. 3, 4 Frequency Aging Absolute Value During the First Year 10 ppm/yr Typical Lid Symbolization (in addition to Lot and/or Date Codes) 410 YWWS Standard Reel Quantity Reel Size 7 Inch 500 Pieces/Reel Reel Size 13 Inch 3000 Pieces/Reel CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50 test system with VSWR 1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, f . Note that insertion loss and bandwidth and passband shape are dependent on c the impedance matching component values and quality. 2. The frequency f is defined as the midpoint between the 3dB frequencies. c 3. Where noted specifications apply over the entire specified operating temperature range. 4. The turnover temperature, T , is the temperature of maximum (or turnover) frequency, f . The nominal frequency at any case temperature, T , may be calculated from: O o c 2 f= f 1 - FTC (T -T ) . o o c 5. Frequency aging is the change in fc with time and is specified at +65C or less. Aging may exceed the specification for prolonged temperatures above +65C. Typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years. 6. The design, manufacturing process, and specifications of this device are subject to change without notice. 7. One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending. 8. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. 2010-2015 by Murata Electronics N.A., Inc. RF1112C (R) 4/29/15 Page 1 of 3 www.murata.comFrequency Characteristics: 10 Dec 2002 09:53:46 CH1 S log MAG 1 dB/ REF -5 dB 1 : 0 dB 21 0.000 000 MHz Max REF=1 PRm BW: .952 466 MHz Cor cent: 314.970538 MHz Q: 330.69 1 1 loss: -2.1279 dB 2 Hld 3 4 START 314.000 000 MHz STOP 316.000 000 MHz 10 Dec 2002 10:26:15 CH1 S log MAG 10 dB/ REF 0 dB 1 : 0 dB 21 0.000 000 MHz Max REF=1 PRm BW: .950 662 MHz Cor 1 cent: 314.971399 MHz Q: 331.32 2 1 loss: -2.1413 dB 3 4 Hld CENTER 315.000 000 MHz SPAN 50.000 000 MHz 2010-2015 by Murata Electronics N.A., Inc. www.murata.com RF1112C (R) 4/29/15 Page 2 of 3