MAX31331
Description
The MAX31331 ultra-low power, real-time clock (RTC) is a time-keeping device that consumes nominal 65n A timekeeping current, extending battery life. The MAX31331 supports a wide range of 32.768k Hz crystals. A crystal with any capacitive loading (CL) spec can be used, which broadens the pool of usable crystals for this device. This device is accessed through an I2C serial interface.
The device also features a backup supply pin (VBAT) and automatically switches over to the backup supply (VBAT) when the main supply (VCC) drops below the programmed threshold voltage and the backup supply (VBAT) voltage.
Other features include two time-of-day alarms, interrupt outputs, programmable square-wave output, event detection input with timestamping, and a serial bus timeout mechanism. The 32-byte timestamp registers double as RAM storage. The device features a digital Schmitt trigger input (DIN) which can be used to record timestamps and/or generate an interrupt on the falling/rising...
