RP1239

Features:

• Designed for 315 MHz Transmitters
• Nominal Insertion Phase Shift of 180° at Resonance
• Quartz Stability
• Rugged, Hermetic, Low-Profile TO39 Case




Specifications

Characteristic Symbol Minimum Typical Maximum Units Center Frequency Absolute Frequency fC 314.925 315.075 MHz Tolerance from 315.000 MHz DfC 75 kHz Insertion Loss IL 5.3 8.5 dB Quality Factor Unloaded Q QU 18000 50 Ohm Loaded Q QL 8100 Temperature Stability Turnover Temperature TO 37 52 67 C Turnover Frequency fO fC+8.5 kHz Frequency Temp. Coefficient FTC 0.037 ppm/C2 Frequency Aging Absolute Value during First Year |fA| 10 ppm/yr DC Insulation Resistance between Any Two Pins 1.0 MOhm RF Equivalent RLC Motional Resistance RM 84 167 Ohm Motional Inductance LM 758.027 uH Motional Capacitance CM 0.336771 fF Shunt Static Capacitance CO 1.9 2.2 2.5 pF Lid Symbolization RP1239

Rating	Value	Units
CW RF Power Dissipation (See: Typical Test Circuit)	+0	dBm
DC Voltage Between Any Two Pins (Observe ESD Precautions)	±30	VDC
Case Temperature	-40 to +85	°C

Description

Designed for 315 MHz Transmitters Nominal Insertion Phase Shift of 180 at Resonance Quartz Stability Rugged, Hermetic, Low-Profile TO39 Case Complies with Directive 2002/95/EC (RoHS)

The RP1239 is a two-port, 180° surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. RP1239 provides reliable, fundamental-mode, quartz frequency stabilization of low-power AM and FSK transmitters operating at 315.0 MHz for use in the United Kingdom under DTI MPT 1340 and in the USA under FCC Part 15. Applications include remote-control and wireless security devices. This is a pin-for-pin replacement in preexisting transmitter circuits utilizing two-port, 180° SAW resonators.