RFM products are now Murata products. RO3073A-6 Designed for 315.0 MHz Transmitters Very Low Series Resistance 315.0 MHz Pb Quartz Stability Surface-mount Ceramic Case SAW Complies with Directive 2002/95/EC (RoHS) Resonator The RO3073A-6 is a one-port surface-acoustic-wave (SAW) resonator packaged in a surface-mount ceramic case. It provides reliable, fundamental-mode quartz frequency stabilization of fixed-frequency transmitters operating at 315.0 MHz. The RO3073A-6 is designed specifically for remote-control and wireless security transmitters. Absolute Maximum Ratings Rating Value Units CW RF Power Dissipation (See: Typical Test Circuit) +0 dBm DC Voltage Between Terminals (Observe ESD Precautions) 30 VDC SM5035-4 Case Temperature -40 to +85 C Soldering Temperature (10 seconds / 5 cycles maximum) 260 C Characteristic Sym Notes Minimum Typical Maximum Units Center Frequency, +25 C Absolute Frequency f 314.950 315.050 MHz C 2,3,4,5 Tolerance from 315.0 MHz f 50 kHz C Insertion Loss IL 2,5,6 1.5 2.2 dB Quality Factor Unloaded Q Q 8000 U 5,6,7 50 Loaded Q Q 1300 L Temperature Stability Turnover Temperature T 10 25 40 C O Turnover Frequency f 6,7,8 f O C 2 Frequency Temperature Coefficient FTC 0.032 ppm/C Frequency Aging Absolute Value during the First Year f 1 10 ppm/yr A DC Insulation Resistance between Any Two Terminals 5 1.0 M R RF Equivalent RLC Model Motional Resistance 19.4 M L Motional Inductance 5, 7, 9 78.4 H M C Motional Capacitance 3.3 fF M C Shunt Static Capacitance 5, 6, 9 4.1 pF O L Test Fixture Shunt Inductance 2, 7 64.2 nH TEST Lid Symbolization (in addition to Lot and/or Date Codes) 789 // YYWWS CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. Frequency aging is the change in f with time and is specified at +65 C or less. 8. Turnover temperature, T , is the temperature of maximum (or turnover) C O Aging may exceed the specification for prolonged temperatures above +65 C. frequency, f . The nominal frequency at any case temperature, T , may be O C Typically, aging is greatest the first year after manufacture, decreasing in 2 calculated from: f = f 1 - FTC (T -T ) . Typically oscillator T is O O C O subsequent years. approximately equal to the specified resonator T . O 2. The center frequency, f , is measured at the minimum insertion loss point, IL , C MIN 9. This equivalent RLC model approximates resonator performance near the with the resonator in the 50 test system (VSWR 1.2:1). The shunt resonant frequency and is provided for reference only. The capacitance C is O inductance, L , is tuned for parallel resonance with C at f . Typically, TEST O C the static (nonmotional) capacitance between the two terminals measured at low f or f is approximately equal to the resonator f . OSCILLATOR TRANSMITTER C frequency (10 MHz) with a capacitance meter. The measurement includes 3. One or more of the following United States patents apply: 4,454,488 and parasitic capacitance withNC pads unconnected. Case parasitic capacitance 4,616,197. is approximately 0.05 pF. Transducer parallel capacitance can by calculated as: 4. Typically, equipment utilizing this device requires emissions testing and C C -0.05pF. P O government approval, which is the responsibility of the equipment manufacturer. 10. Tape and Reel standard per ANSI / EIA 481. 5. Unless noted otherwise, case temperature T =+25 2 C. C 6. The design, manufacturing process, and specifications of this device are subject to change without notice. 7. Derived mathematically from one or more of the following directly measured parameters: f , IL, 3 dB bandwidth, f versus T , and C . C C C O 2010-2014 by Murata Electronics N.A., Inc. RO3073A-6 (R) 3/26/14 Page 1 of 2 www.murata.comElectrical Connections Equivalent RLC Model The SAW resonator is bidirectional and may be Terminal 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 Terminal recommended to help reduce parasitic Temperature Characteristics capacitance in the circuit. The curve shown on the right f = f , T = T C O C O Typical Test Circuit 0 0 accounts for resonator The test circuit inductor, L , is tuned to resonate with the static TEST -50 -50 contribution only and does not capacitance, C , at F . O C include LC component -100 -100 temperature contributions. -150 -150 -200 -200 ELECTRICAL TEST -80 -60 -40 -20 0 +20 +40 +60 +80 Case T = T - T ( C ) C O From 50 To 50 Network Analyzer Network Analyzer POWER TEST P INCIDENT Terminal Low-Loss 50 Source Matching NC NC P at F REFLECTED Network to C 50 Terminal P P CW RF Power Dissipation = INCIDENT - REFLECTED Typical Application Circuits Typical Low-Power Transmitter Application +9VDC 200k Modulation 47 % Input C1 L1 (Antenna) PCB Land Pattern C2 Top View RF Bypass RO3XXXA Bottom View 470 Millimeters Inches Dimensions Min Nom Max Min Nom Max A 4.87 5.00 5.13 0.191 0.196 0.201 Typical Local Oscillator Applications B 3.37 3.50 3.63 0.132 0.137 0.142 Output C 1.45 1.53 1.60 0.057 0.060 0.062 D 1.35 1.43 1.50 0.040 0.057 0.059 +VDC C1 +VDC E 0.67 0.80 0.93 0.026 0.031 0.036 F 0.37 0.50 0.63 0.014 0.019 0.024 L1 G 1.07 1.20 1.33 0.042 0.047 0.052 C2 H - 1.04 - - 0.041 - I - 1.46 - - 0.058 - RO3XXXA RF Bypass J - 3.01 - - 0.119 - Bottom View K - 1.44 - - 0.057 - L - 1.92 - - 0.076 - 2010-2014 by Murata Electronics N.A., Inc. www.murata.com RO3073A-6 (R) 3/26/14 Page 2 of 2 (ppm) (f-f ) f / o o Case Ground Case Ground