by ECS, Inc. International
on 26 January 2018

ECS introduces the ultra-minature ECX-34RR is a very compact SMD Tuning Fork Crystal with a Typical ESR of 20K Ω. Low ESR part recommended by STMicroelectronics for the STM32 Microcontrollers.

34B ECX 31B


  • Low Power RTC Applications
    such as STM32 AN2867
  • 20K Typ ESR
  • 3.2 x 1.5 mm Footprint
  • Extended Temp Range
  • RoHS Compliant


  • IoT
  • Automotive
  • COTS
  • Navigation
  • Medical (non-life sustaining)
  • Mobile devices
  • Industrial applications
  • Wireless devices
  • Test equipment

Search Product Options
Search for ECX-1637Q Series Quartz Crystals

Please contact us if you need additional information or have a specific requirement in your application.

ECS, Inc. International
15351 West 109th Street
Lenexa, KS 66219

Tel: 913-782-7787
Toll Free: 1-800-237-1041
Fax: 913-782-6991