RFM products are now
• Ideal for 303.825 MHz Remote Control and Security Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS)
The RO3104C 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
303.825 MHz. This SAW resonator is designed for transmitters used in remote control and wireless security
applications operating in the USA under FCC Part 15 and in Canada under DoC RSS-210.
Absolute Maximum Ratings
Input Power Level
Soldering Temperature (10 seconds / 5 cycles maximum)
-40 to +85
Sym Notes Minimum Typical Maximum Units
Frequency, +25 °C
Tolerance from 303.825 MHz
2, 3, 4, 5
IL 2, 5, 6
1.3 2.0 dB
50 Loaded Q
Frequency Temperature Coefficient
Absolute Value during the First Year
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model Motional Resistance
Shunt Static Capacitance
Test Fixture Shunt Inductance
6, 7, 8
5, 7, 9
5, 6, 9
688 // 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.
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
The design, manufacturing process, and specifications of this device are
subject to change without notice.
above +65 °C. Typically, aging is greatest the first year after manufacture, 7. Derived mathematically from one or more of the following directly
decreasing in subsequent years.
measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
2. The center frequency, fC, is measured at the minimum insertion loss point, 8. Turnover temperature, TO, is the temperature of maximum (or turnover)
ILMIN, with the resonator in the 50 test system (VSWR 1.2:1). The
frequency, fO. The nominal frequency at any case temperature, TC, may be
shunt inductance, LTEST, is tuned for parallel resonance with CO at fC.
Typically, fOSCILLATOR or fTRANSMITTER is approximately equal to the
calculated from: f = fO [1 - FTC (TO -TC)2]. Typically oscillator TO is
approximately equal to the specified resonator TO.
9. This equivalent RLC model approximates resonator performance near the
3. One or more of the following United States patents apply: 4,454,488 and
4. Typically, equipment utilizing this device requires emissions testing and
government approval, which is the responsibility of the equipment
5. Unless noted otherwise, case temperature TC = +25 ± 2 °C.
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.
©C2o0p1y0r-i2g0h1t4©byMMuurraattaaEMleactnrounfiaccstNu.rAin.,gInCc.o., Ltd. All Rights Reserved 2007
RO3104C (R) 4/8/14
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