IDT5P90005 Datasheet | Integrated Device Technology

PRELIMINARY DATASHEET SERIAL REAL-TIME CLOCK Description The IDT5P90005 is a serial real-time clock (RTC) device that consumes ultra-low power and provides a full binary-coded decimal (BCD) clock/calendar. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. Access to the clock/calendar registers is provided by an I2C interface capable of operating in fast I2C mode. Built-in Power-sense circuitry detects power failures and automatically switches to the backup supply, maintaining time and date operation. IDT5P90005 Features - Packaged in 8-pin SOIC - Counters for seconds, minutes, hours, days, date, months, years, and century - 32 k Hz crystal oscillator integrating load capacitance (12.5 p F) providing exceptional oscillator stability and high crystal series resistance operation - Serial interface supports I2C bus (100 or 400 k Hz protocol) - - - - - Ultra low battery supply current of 0.8 µA (typ at 3 V) 2.0 to 5.5 V clock operating voltage Automatic switch over and deselect circuitry Automatic leap year pensation Operating temperature of -40 to +85°C Block Diagram OSCI OSCO 32.768 k Hz Oscillator and Divider 1 Hz MUX/ Buffer FT/OUT VCC GND VBAT SCL SDA Power Control Control Logic Clock, Calendar Counter I2 C Interface 1 Byte Control 7 Bytes Buffer IDT™ SERIAL REAL-TIME CLOCK REV E 031209 IDT5P90005 SERIAL REAL-TIME CLOCK Pin Assignment OSCI OSCO VBAT VSS 1 2 3 4 8 7 6 5 VCC FT/OUT SCL...