IDT5P90005C Datasheet, PDF (1/15 Pages) Integrated Device Technology – Serial Real-Time Clock

Serial Real-Time Clock
IDT5P90005C
DATASHEET
Description
The IDT5P90005C 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.
Features
• Packaged in 8-pin SOIC, RoHS compliant
• Counters for seconds, minutes, hours, days, date, months,
years, and century
• 32kHz 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 400kHz protocol)
• Ultra low battery supply current of 0.8µA (typical at 3V)
• 2.0 to 5.5V clock operating voltage
• Automatic switch over and deselect circuitry
• Automatic leap year compensation
• Extended commercial operating temperature (0 to +85°C)
Block Diagram
OSCI
OSCO
VCC
GND
V_BAT
SCL
SDA
1 Hz
32.768 kHz
Oscillator and
Divider
MUX/
Buffer
Power
Control
Control
Logic
Clock, Calendar
Counter
I²C
Interface
1 Byte 7 Bytes
Control Buffer
FT/OUT
IDT5P90005C REVISION C 07/03/14
1
©2014 Integrated Device Technology, Inc.