Ideal for European 857.65 MHz Transmitters Very Low Series Resistance Quartz Stability Surface-Mount Ceramic Case with 21 mm2 Footprint

The 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 local oscillators operating at 857.65 MHz. This SAW is designed for 868.35 MHz superhet receivers with 10.7 MHz IF. Applications include remote-control and wireless security receivers operating under ETSI-ETS 220 in Europe and under FTZ 2100 in Germany.

Rating CW RF Power Dissipation DC Voltage Between Terminals Case Temperature Soldering Temperature Value +85 +250 Units dBm VDC �C

Frequency (+25 �C) Characteristic Nominal Frequency Sym RO2166A-2 fC Notes Minimum 857.500 857.550 Typical Maximum Units MHz

Unloaded Q 50 Loaded Q Temperature Stability Turnover Temperature Turnover Frequency Temperature Coefficient Frequency Aging Absolute Value during the First Year DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Motional Resistance Motional Inductance Motional Capacitance Transducer Static Capacitance Test Fixture Shunt Inductance Lid Symbolization

1. Frequency aging is the change in fC with time and is specified +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 = +25�C�2�C. The design, manufacturing process, and specifications of this device are subject to change without notice. 7. 8. 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: [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: - 0.05 pF.

RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 1963 251383 Fax: by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.

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.

accounts for resonator contribution only and does not include LC component temperature contributions.

The circuit board land pattern shown below is one possible design. The optimum land pattern is dependent on the circuit board assembly process which varies by manufacturer. The distance between adjacent land edges should at a maximum to minimize parasitic capacitance. Trace lengths from terminal lands to other components should be short and wide to minimize parasitic series inductances.

The case material is black alumina with contrasting symbolization. All pads are nominally centered with respect to the base and consist to 70 microinches electroless gold on 60-350 micorinches electroless nickel.

RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 1963 251383 Fax: by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.