器件名称: ISL12022MIBZ
功能描述: Real Time Clock with Embedded Crystal,
文件大小: 376.27KB 共27页
简 介:
ISL12022M
Real Time Clock with Embedded Crystal, ±5ppm Accuracy
Data Sheet December 18, 2008 FN6668.4
Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation, and Auto Daylight Saving
The ISL12022M device is a low power real time clock (RTC) with an embedded temperature sensor and crystal. Device functions include oscillator compensation, clock/calendar, power fail and low battery monitors, brownout indicator, one-time, periodic or polled alarms, intelligent battery backup switching, Battery Reseal function and 128 bytes of battery-backed user SRAM. The device is offered in a 20 Ld SOIC module that contains the RTC and an embedded 32.768kHz quartz crystal. The calibrated oscillator provides less than ±5ppm drift over the full -40°C to +85°C temperature range. The RTC tracks time with separate registers for hours, minutes, and seconds. The calendar registers track date, month, year and day of the week and are 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. The time stamp function records the time and date of switchover from VDD to VBAT power, and also from VBAT to VDD power.
Features
Embedded 32.768kHz Quartz Crystal in the Package 20 Ld SOIC Package (for DFN version, refer to the ISL12020M) Real Time Clock/Calendar - Tracks Time in Hours, Minutes and Seconds - Day of the We……
