RFM offers a full set of custom embedded wireless networking solutions like Zigbee wireless mesh sensor networks, RF modules, IC transceiver, IC transmitters and IC receivers. RFM, Inc. manufactures low power wireless and RF radio modules, wireless mesh nodes for distributed sensing on distributed sensor networks. Low Power radio, n../arrowband and short range devices, front end saw filters, active RFID, RFIC, coupled resonator filters, single silicon chips in the 70MHZ and 300-1000Mhz range.

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RF Components
Products Guide



Wireless Device
Selection Guide

RO2123A

5.97x3.94mm case
Not for new design
Replacement Part RO3123A

307.3 MHz Resonator - Single Port


Click here if you need additional technical information,
to inquire about samples or to discuss your custom needs.


• Ideal for 318 MHz Superhet Receiver LOs
• Very Low Series Resistance
• Quartz Stability
• Surface-Mount, Ceramic Case with 21 mm2 Footprint
• Complies with Directive 2002/95/EC (RoHS)
Click here if you need additional technical information,
to inquire about samples or to discuss your custom needs.

download data sheet Rev Date 03/25/08

download Package Specs

  • Features
  • AppNotes
  • Buy Now
  • End of Life
The RO2123A 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 approximately 307.3 MHz. This SAW is designed for 318 MHz superhet receivers with 10.7 MHz IF. Applications include remote-control and wireless security receivers operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Australia.

Mouser Avnet Digi-Key Future Electronics Xinkai Digital North America Countries

RFM products are sold through a world-wide network of manufacturer's sales reps and distributors.

The purpose of this End-of-Life Product Notice is to communicate the obsolescence of the RO2123A.

REPLACEMENT PARTS. RFM will provide technical assistance to minimize customer resources and time required to transition to an alternative product. RFM recommends the following replacement part: RO3123A,

LAST-TIME-BUY. The notice of obsolescence for this device was announced August 2007. As a result, last-time-buy orders (LTB) will be accepted based on product availability.
Buy from Mouser
Buy from Acal
Buy from Avnet
Buy from Digi-Key
Buy from Nu Horizons

TERMS. All orders will be non-cancellable, non-returnable and all shipments must be complete by May 31, 2010. All last time buy orders are covered by the RFM standard One Year Product Warranty.

Please contact local RFM Sales Rep or Distributor for additional information.

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