HT1382_1105 Datasheet, PDF (1/29 Pages) Holtek Semiconductor Inc – I2C/3-Wire Real Time Clock

HT1382
I²C/3-Wire Real Time Clock
Features
· 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 I²C or 3-wire interface
· 8-pin DIP, SOP and MSOP package for I²C interface
· 10-pin MSOP package for 3-wire interface
Applications
· 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: I²C 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