The SNAPHAT is a snap-on package containing a crystal and a lithium coin cell and is designed to snap onto the ST TIMEKEEPER IC after the high temperature surface-mount solder process. * Clock frequency 32.768kHz * Frequency precision 35ppm * Supply voltage 2.8V https://elecena.pl/product/27178485/st-m4t28-br12sh1-snaphat-battery 2024-11-08 https://elecena.pl/product/27178485/st-m4t28-br12sh1-snaphat-battery 2025-06-22