Close-tolerance crystals for wearable and data comms applications

October 13, 2014 // By Graham Prophet
Murata's XRCFD and XRCMD series of highly accurate miniature 1612 size crystal units have an overall (see note) frequency precision of ±20 ppm, and are rated for use with LTE/3G, Wi-Fi, Bluetooth, Bluetooth Low Energy, ZigBee and NFC.

They are also suitable for wired data communications applications such as Ethernet, and USB 3.0 in addition to hard disc and solid-state disc systems. Measuring 1.6 x 1.2 x 0.35 mm the XRCFD-F series crystal unit is available with nominal operating frequencies from 24.000 to 31.999 MHz. Operating temperature is in the range -30 to +85C. The XRCMD-F series has an operating frequency in the range 32.000 to 48.000 MHz and measures 1.6 x 1.2 x 0.33 mm.

Both series employ Murata's fusion sealing technology for a complete hermetic seal and use an alloy in the metal cap structure. Its packaging technology achieves superior miniaturization, contributing to a high-density mounting and slimming of the unit.

Note; overall frequency precision (initial) measured at +25 degrees C with temperature characteristics of -30 to +85 deg.C, ageing and up to two re-flow soldering process

Murata Europe;