312.00 MHZ ONE-PORT SAW RESONATOR • • • • Ideal for 312.00 MHz Transmitters Very Low Insertion Loss Quartz Stability Rugged, Hermetic, Low Profile TO-39 Package SR312 ABSOLUTE MAXIMUM RATING (TA=25°C) Parameter Rating Unit CW RF Power Dissipation P 0 dBm DC Voltage VDC ±30 V Operating Temperature Range TA -10 ~ +60 °C Storage Temperature Range Tstg -40 ~ +85 °C ELECTRONIC CHARACTERISTICS Parameter Frequency (25°C) Sym Minimum Typical Temperature Stability Frequency Aging fC NS 312.00 NS MHz ΔfC - - ± 75 KHz IL - 1.3 1.8 dB Unloaded Q-Value QU - 15,950 - - 50Ω Loaded Q-Value QL - 2,200 - - Turnover Temperature TO 25 - 55 °C Turnover Frequency fO - fc - KHz Frequency Temperature Coefficient FTC - -0.032 - ppm/°C Absolute Value during the First Year |fA| - - 10 ppm/yr - 1.0 - - MΩ Motional Resistance RM - 16 23 Ω Motional Inductance LM - 130.2466 - μH Motional Capacitance CM - 1.9999 - fF Pin 1 to Pin 2 Static Capacitance CO 2.1 2.4 2.7 pF DC Insulation Resistance Between any Two Pins RF Equivalent RLC Model Unit Tolerance from 312.00 MHz Nominal Frequency Insertion Loss Quality Factor Maximum 2 NS = Not Specified Notes: 1. The center frequency, fC, is measured at the minimum IL point with the resonator in the 50Ω test system. 6. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and C0. 2. Unless noted otherwise, case temperature TC = +25°C ± 2°C. 7. The specifications of this device are based on the test circuit shown above and subject to change or obsolescence without notice. 3. 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. 8. Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufacturer. 4. Turnover temperature, T0, is the temperature of maximum (or turnover) frequency, f0. The nominal frequency at any case temperature, TC, may be calculated from: f = f0 [1 - FTC (T0 - TC)2]. 9. Our liability is only assumed for the Surface Acoustic Wave (SAW) component(s) per se, not for applications, processes and circuits implemented within components or assemblies. 5. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance C0 is the measured static (nonmotional) capacitance between Pin1 and Pin2. The measurement includes case parasitic capacitance. 10. For questions on technology, prices and delivery please contact our sales offices or e-mail to [email protected]. Phone: +86 (10) 5820-3910 SR312 © VANLONG TECHNOLOGY CO., LTD. Fax: +86 (10) 5820-3915 Revision Version #1 July 05, 2010 Email: [email protected] Web: http://www.vanlong.com Page 1 of 2 312.00 MHZ ONE-PORT SAW RESONATOR PACKAGE DIMENSIONS (TO-39) Electrical Connections Terminals 1 2 3 Connection Input/ Output Output/ Input Case-Ground Package Dimensions Dimensions A B C D E F G MARKING Nom (mm) Min Max 9.10 9.50 3.20 3.60 2.80 3.20 Φ0.25 Φ0.65 4.98 5.18 2.54 Nominal 0.4 0.5 EQUIVALENT LC MODEL AND TEST CIRCUIT Laser or Ink Marking SR312 YYWW YWW Line 1: Part Number Line 2: Date Code Ω Ω Y : Last digit of year WW : Week No. TYPICAL APPLICATION CIRCUIT Low Power Transmitter Application Local Oscillator Application TYPICAL FREQUENCY RESPONSE TEMPERATURE CHARACTERISTICS (f - fo)/fo (ppm) fc = fo, Tc = To ΔT= Tc –To (°C) The curve shown above accounts for resonator contribution only and does not include oscillator temperature characteristics. Phone: +86 (10) 5820-3910 SR312 © VANLONG TECHNOLOGY CO., LTD. Fax: +86 (10) 5820-3915 Revision Version #1 July 05, 2010 Email: [email protected] Web: http://www.vanlong.com Page 2 of 2