M4182SM6E Serial I2C bus RTC with battery switchover
M4182SM6F Serial I2C bus RTC with battery switchover
M4182SMY6E Serial I2C bus RTC with battery switchover
M4182SMY6F Serial I2C bus RTC with battery switchover
M4182SQA6E Serial with battery switchover
M4182SQA6F Serial with battery switchover