Catalog > Semiconductors > IC - Voltage Regulators Battery Backup IC Lithium Battery Backup IC Lithium M4T28-BR12SH1 Battery Backup IC Lithium 2,8V 4 Pin SOIC 199.50 ZAR inc for 1 Each 5 in Stock Add Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Additional Information Notes SNAPHAT® Lithium Coin Cell Battery with Crystal, STMicroelectronics These Battery and Crystal Option devices are detachable lithium power sources housed in special top called SNAPHAT®. The SNAPHAT is snapped on the top of the surface-mounted IC in the Printed Circuit board. Also compatible with the non-volatile TIMEKEEPER® package by STMicroelectronics. SRAM & NVRAM Accessories