ISL12020M

Description

The ISL12020M device is a low power real time clock (RTC) with an embedded temperature sensor for oscillator compensation, clock/calendar, power fail, low battery monitor, brownout indicator, single periodic or polled alarms, intelligent battery-backup switching, and 128 bytes of battery-backed user SRAM. The ISL12020M is offered in a 20 Ld DFN module that contains the RTC and an embedded 32.768kHz quartz crystal. The combined device ISL12020M is trimmed to provide less than ±5ppm drift over -40C to +85C temperature range. The RTC tracks time with separate registers for hours, minutes, and seconds. The ISL12020M has calendar registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year correction. Daylight Savings time adjustment is done automatically, using parameters entered by the user. Power-fail and battery monitors offer user-selectable trip levels. A time stamp function records the time and date of switchover from VDD to VBAT power, and also from VBAT to VDD power.