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5P90005DCGI8

Description
SERIAL REAL-TIME CLOCK
File Size231KB,16 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
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5P90005DCGI8 Overview

SERIAL REAL-TIME CLOCK

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 I
2
C interface capable of operating in fast I
2
C
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 µA (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
V
BAT
SCL
SDA
Power
Control
Control
Logic
Clock, Calendar
Counter
I
2
C
Interface
1 Byte
Control
7 Bytes
Buffer
IDT™
SERIAL REAL-TIME CLOCK
1
IDT5P90005
REV E 031209

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