ISL12022MIBZ-T

ISL12022MIBZ-T 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. Backup battery current draw is less than 1.6µA over the temperature range. 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 across 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. Typical applications include utility meters, POS equipment, printers and copiers and digital cameras.

• Embedded 32.768KHz quartz crystal in the package
• On-chip oscillator temperature compensation
• 10-bit digital temperature sensor output
• 15 selectable frequency outputs
• Interrupt for alarm or 15 selectable frequency outputs
• Automatic backup to battery or supercapacitor
• VDD and battery status monitors
• Battery reseal function to extend battery shelf life
• Power status brownout monitor and time stamp for battery switchover
• 128 bytes battery-backed user SRAM, 1.6µA maximum battery current and I2C bus