MAX31329NELB+

MAX31329NELB+ is a low-current, real-time clock (RTC). It is a time-keeping device that provides time-keeping current in nanoamperes, thus extending battery life. It incorporates an integrated 32.768KHz crystal, which eliminates the need for an external crystal. This device is accessed through an I²C serial interface. It features one digital Schmitt trigger input (DIN) and generates an interrupt output on a falling or rising edge of this digital input. An integrated power-on reset function ensures deterministic default register status upon power-up. Other features include two time-of-day alarms, interrupt outputs, a programmable square-wave output, and a serial bus timeout mechanism. It is used in applications such as industrial equipment, test and measurement equipment, energy meters, medical devices, portable instruments, factory automation, IoT devices, surveillance cameras, and servers.

• Trickle charger for external supercapacitor or rechargeable battery
• A schmitt trigger input for event detection, programmable square-wave output for clock monitoring
• Two interrupt pins for multiple wakeup configurations
• Clock input pin for external clock synchronization, 64byte RAM for user data storage
• Two time-of-day alarms, +1.6V to +5.5V operating voltage range
• Countdown timer with repeat and pause functions, power-on reset for default configuration
• Automatic switchover to backup battery or supercapacitor on power-fail
• Lockup-free operation with bus timeout, timekeeping current is 200nA typical
• SCL clock frequency is 400KHz maximum at (VCC = +1.6V to +5.5V)
• Operating temperature range from -40°C to +85°C, 10-lead LGA package

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