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Abstract: This application note explains the differences between several Maxim real-time clocks (RTCs), including the DS3231,DS3232, DS3234, DS32B35, and DS32C35, to help customers identify the proper solution for their application. The DS3231M, whichhas a built-in microelectronic mechanical systems (MEMS) resonator instead of a crystal, is also discussed.Maxim, a leader in real-time clocks (RTCs), has designed several devices to meet the needs of the ever-demanding RTC market.These products provide completely integrated, extremely accurate, and temperature-compensated RTC solutions. Much of a RTC'saccuracy is dependent on the crystal accuracy across temperature. Thus, temperature compensation of the crystal characteristicsallows for higher accuracy on these devices.This application note explains the differences between several RTCs (the DS3231, DS3232, DS3234, DS32B35, and DS32C35) tohelp customers identify the proper solution for their application. The DS3231M, which has a built-in microelectronic mechanicalsystems (MEMS) resonator instead of a crystal, is also discussed.

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