The minature ECX-16 is a very compact SMD Tuning Fork Crystal. Low ESR part recommended by STMicroelectronics for the STM32 Microcontrollers. ECX-16 32.768 KHz SMD Tuning Fork Crystal Request a Sample ECX-16 SMD CRYSTAL Low Power RTC Applications such as STM32 AN2867 1.6 x 1.0 mm Footprint Extended Temp. Range RoHS Compliant Applications: Automotive, COTS, Industrial, IOT DIMENSIONS (mm) OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS PARAMETERS Frequency Freq.