SAW Resonator LGER550 The LGER550 is a true one-port，surface-acoustic-wave (SAW) resonator in a surface-mount ceramic QCC8C case. It provides reliable ， fundamental-mode ， quartz frequency stabilization of fixed-frequency transmitters operating at 433.920 MHz. 1.Package Dimension (QCC8C) Pin Pin Connection Connection 21 Input / Output Terminal1 Output / Input Terminal2 62 4,83 1,3,5,7 2.Marking Case Ground Case Ground Empty Sign Data (unit: mm) Sign Data(unit:mm) A 2.08 E 1.20 B 0.60 F 1.35 C 1.27 G 5.00 D 2.54 H 5.00 3.Equivalent LC Model and Test Circuit LGER550 Color: Black or Blue 4.Typical Application Circuit 1) Telecontrol Circuitry 2) Local Oscillator Application 5.Typical Frequency Response 6.Temperature Characteristics SAW Resonator LGER550 7.Performance 7-1.Maximum Ratings Rating Value Units +10 dBm ±30V VDC -40 to +85 ℃ +235 ℃ CW RF Power Dissipation DC Voltage Between Any Two Pins Case Temperature Soldering Temperature 7-2.Electronic Characteristics Characteristic Center Frequency (+25℃) Absolute Frequency Temperature Stability fC 433.845 Maximum Units 433.995 MHz IL 1.3 Unloaded Q QU 10,500 50 Ω Loaded Q QL 1,450 Turnover Temperature TO Turnover Frequency fO fc kHz FTC 0.037 ppm/℃2 |fA| ≤10 ppm/yr Absolute Value during the First Year DC Insulation Resistance Between Any Two Pins RF Equivalent RLC Model Typical ±75 Frequency Temperature Coefficient Frequency Aging Minimum ∆fC Tolerance from 433.920 MHz Insertion Loss Quality Factor Sym 25 40 kHz 2.0 dB 55 ℃ 1.0 MΩ RM 16 Motional Inductance LM 61.724 µH Motional Capacitance CM 2.1817 fF Pin 2 to Pin 6 Static Capacitance CO 1.9 2.2 26 Ω Motional Resistance 2.5 pF ☺ CAUTION: Electrostatic Sensitive Device. Observe precautions for handling ! NOTES: 1. Frequency aging is the change in fC with time and is specified at +65℃or less. Aging may exceed the specification for prolonged temperatures above +65℃. Typically, aging is greatest the first year after manufacture, decreasing in subsequent years. 2.The center frequency, fC ,is the frequency of minimum IL measured with the resonator in the specified test fixture in a 50 Ω test system with VSWR ≤ 1.2 : 1. Typically, foscillator or ftransmitter is approximately equal to the resonator fC. 3.Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufacturer. 4.Unless noted otherwise , case temperature TC=+25℃±2℃. 5.The design, manufacturing process, and specifications of this device are subject to change without notice. 6.Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC , and CO. 7.Turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fO, The nominal center 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. 8.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 (10MHz) with a capacitance meter. Case parasitic capacitance is approximately 0.05pF.Transducer parallel capacitance can by calculated as: CP = CO 0.05pF.