MCP79410-I/SN

Battery-Backed I2C Real-Time Clock/Calendar with SRAM and EEPROM

The MCP79410 general purpose I2C™Compatible real-time clock/calendar (RTCC) is highly integrated with nonvolatile memory and advanced features normally found in higher priced devices. These features include a battery switchover circuit for backup power, a timestamp to log power failures and digital trimming for accuracy. Using a low-cost 32.768 kHz crystal or other clock source, time is tracked in either a 12-hour or 24-hour format with an AM/PM indicator and timing to the second, minute, hour, day of the week, day, month and year. As an interrupt or wakeup signal, a multifunction open drain output can be programmed as an Alarm Out or as a Clock Out that supports 4 selectable frequencies. In addition, non-volatile memory is included along with a Unique ID in a locked section of EEPROM that can be unlocked and programmed by the End User.

MCP79410-I/SN

Battery-Backed I2C Real-Time Clock/Calendar with SRAM and EEPROM

Product Features

• Hours, Minutes, Seconds, Day of Week, Day, Month, Year

• Leap year compensated  to 2399

• 12/24 hour modes

• 1 PPM Resolution

• ±129 PPM Range

• Dual Programmable Alarms

• Clock output with selectable frequency

• Alarm output

• General Purpose output

• Time logged on switchover to and from Battery Backup

• I2C Clock Frequency up to 400 kHz

• 64 Bytes Battery-Backed SRAM

• 1Kb EEPROM Memory

• Robust write unlock sequence

• Operating Voltage 1.8V to 5.5V

• Backup Voltage 1.3V to 5.5V

• Low Typical Timekeeping Current

• Automatic Switchover to Battery Backup

Parametrics