HT1382
I
2
C/3-Wire Real Time Clock
Features
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Real Time Clock/Calendar Functions
-
Includes: Sec, Minutes, Hours, Day, Date, Month, and year in BCD format
Clock operating voltage: 2.0V~5.5V
Supply voltage V
DD
=2.7V~5.5V
Automatic leap year correction, valid until year 2099
Automatic supply switch over
Integrated oscillator load capacitors - CL=12.5pF
Clock compensation
Programmable alarm and interrupt function
15 selectable frequency outputs
4 Bytes EEPROM for user
Serial commutation via I
2
C or 3-wire interface
8-pin DIP, SOP and MSOP package for I
2
C interface
10-pin MSOP package for 3-wire interface
Applications
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Utility meters
Consumer electronics
Portable equipment
Wireless equipment
POS equipment
Computer products
Other industrial/Medical/Automotive applications
General Description
The HT1382 is a low power real time clock device with two serial interface: I
2
C or 3-wire. The
interface mode is selected by the chosen chip version. The device provides both clock and calendar
information in BCD format and also includes alarm functions. The calendar is accurate until the year
2099 and includes automatic leap year correction.
An external 32768Hz crystal is used as the device oscillator for device timing for which is provided an
integrated crystal load capacitance of 12.5pF. The device includes a crystal oscillator temperature
compensation function and internal power control circuitry detects power failures and automatically
switches to the battery supply when a power failure occurs.
Rev. 1.40
1
May 27, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
