RFM products are now Murata products. RO3144C * * * * Ideal for 916.5 MHz Remote Control and Data Telemetry Transmitters Very Low Series Resistance Quartz Stability Pb Complies with Directive 2002/95/EC (RoHS) 916.5 MHz SAW Resonator The RO3144C is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case. It provides reliable, fundamental-mode, quartz frequency stabilization of low power transmitters operating at 916.5 MHz. This SAW resonator is specifically designed for transmitters used in remote control and data telemetry applications operating in the USA under FCC Part 15 and in Canada under DoC RSS-210. Absolute Maximum Ratings Rating Value Units Input Power Level 0 dBm DC Voltage 12 VDC Storage Temperature -40 to +85 C 260 C Soldering Temperature (10 seconds / 5 cycles maximum) SM5050-8 Case 5X5 Electrical Characteristics Characteristic Frequency, +25 C Sym fC Absolute Frequency Insertion Loss Quality Factor Temperature Stability Frequency Aging 2, 3, 4, 5 fC Tolerance from 916.500 MHz IL Unloaded Q QU 50 Loaded Q QL Turnover Temperature TO Turnover Frequency fO Maximum Units 916.700 MHz 200 kHz 2.5 dB 40 C 1.2 2800 10 Absolute Value during the First Year |fA| 25 fC 6, 7, 8 FTC ppm/C2 ppm/yr 0.032 1, 6 5 Motional Resistance RM Motional Inductance LM Motional Capacitance CM Shunt Static Capacitance CO 5, 6, 9 LTEST 2, 7 10 1.0 5, 7, 9 Lid Symbolization Standard Reel Quantity Typical 916.300 26000 Frequency Temperature Coefficient Test Fixture Shunt Inductance Minimum 2, 5, 6 DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Notes M 12.7 55.9 H .54 fF 2.2 pF 13.5 nH 691 // YWWS Reel Size 7 Inch 500 Pieces / Reel Reel Size 13 Inch 3000 Pieces / Reel CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. 2. 3. 4. 5. 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 in subsequent years. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 test system (VSWR 1.2:1). The shunt inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLATOR or fTRANSMITTER is approximately equal to the resonator fC. One or more of the following United States patents apply: 4,454,488 and 4,616,197. Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufacturer. Unless noted otherwise, case temperature TC = +25 2 C. (c)2010-2014 by Murata Electronics N.A., Inc. RO3144C (R) 5/1/14 6. 7. 8. 9. Page 1 of 2 The design, manufacturing process, and specifications of this device are subject to change without notice. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. 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]. Typically oscillator TO is approximately equal to the specified resonator TO. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance CO is the static (nonmotional) capacitance between the two terminals measured at low frequency (10 MHz) with a capacitance meter. The measurement includes parasitic capacitance with "NC" pads unconnected. Case parasitic capacitance is approximately 0.05 pF. Transducer parallel capacitance can by calculated as: CP CO - 0.05 pF. www.murata.com Electrical Connections Pin The SAW resonator is bidirectional and may be installed with either orientation. The two terminals are interchangeable and unnumbered. The callout NC indicates no internal connection. The NC pads assist with mechanical positioning and stability. External grounding of the NC pads is recommended to help reduce parasitic capacitance in the circuit. Parameter Test Circuit Connection 1 NC 2 Terminal 3 NC 4 NC 5 7 From 50 Network Analyzer NC 6 Terminal 7 NC 8 NC 1 8 6 To 50 Network Analyzer 2 4 5 3 Power Test Circuit NC 8 1 D 7 7 50 Source at F C 1 2 6 6 2 3 5 5 3 G Low-Loss Matching Network to 50 1 NC 2 8 NC 7 3 NC 4 6 5 NC NC Example Application Circuits 4 4 P INCIDENT P REFLECTED F Typical Low-Power Transmitter Application 200k Modulation Input +9VDC C1 47 L1 (Antenna) L 1 2 8 J 7 M 6 3 4 5 C2 P ROXXXXC Bottom View H RF Bypass 470 Typical Local Oscillator Application I Q N K +VDC C1 2 8 A B C D E F G H I J K L M N O P Q Min 4.80 4.80 1.30 1.98 1.07 0.50 2.39 mm Nom 5.00 5.00 1.50 2.08 1.17 0.64 2.54 1.27 0.76 1.55 2.79 0.76 2.36 1.55 2.79 2.79 2.79 +VDC L1 O 1 Dimension Output 200k Max 5.20 5.20 1.70 2.18 1.27 0.70 2.69 Min 0.189 0.189 0.050 0.078 0.042 0.020 0.094 Inches Nom 0.197 0.197 0.060 0.082 0.046 0.025 0.100 0.050 0.030 0.061 0.110 0.030 0.093 0.061 0.110 0.110 0.110 7 Max 0.205 0.205 0.067 0.086 0.050 0.028 0.106 6 3 4 5 C2 ROXXXXC Bottom View RF Bypass Equivalent RLC Model 0.05 pF* Cp Rm Lm Co = Cp + 0.05 pF *Case Parasitics Cm Temperature Characteristics The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. fC = f O , T C = T O 0 0 -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) A E C B 8 -200 -80 -60 -40 -20 -200 0 +20 +40 +60 +80 T = TC - T O ( C ) (c)2010-2014 by Murata Electronics N.A., Inc. 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