HT1382_14 Datasheet, PDF (1/23 Pages) Holtek Semiconductor Inc – I2C/3-Wire Real Time Clock

HT1382
I²C/3-Wire Real Time Clock
Feature
• 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 VDD=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. 1.50
1
July 24, 2014