器件名称: IDT5P90005
功能描述: SERIAL REAL-TIME CLOCK
文件大小: 303.43KB 共16页
简 介: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 kHz crystal oscillator integrating load capacitance
(12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation
Serial interface supports I2C bus (100 or 400 kHz
protocol)
Ultra low battery supply current of 0.8 A (typ at 3 V) 2.0 to 5.5 V clock operating voltage Automatic switch over and deselect circuitry Automatic leap year compensation Operating temperature of -40 to +85°C
Block Diagram
OSCI OSCO
32.768 kHz 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 ……