Microchip Technology's MCP79402T-I/MS Real-Time Clock/Calendar

The MCP79402T-I/MS is a highly integrated Real-Time Clock/Calendar (RTCC) from Microchip Technology, designed to offer precise time and date tracking, down to the second. This compact, feature-rich component is housed in an 8-MSOP (Micro Small Outline Package), making it an ideal choice for space-constrained applications.

This RTCC integrates 64 bytes of battery-backed SRAM as well as unique ID space that is factory-programmed with a 48-bit MAC (Media Access Control) address, which can be used for networked devices. Its built-in power-fail timestamp captures the time and date when the main power is lost, enhancing reliability in systems that require accurate timekeeping even during power interruptions.

The device operates over the standard voltage range of 1.8V to 5.5V and features a battery-backup input pin. This pin allows the MCP79402T-I/MS to maintain timekeeping and SRAM operation even when the main power is not available, by switching seamlessly to the backup power supply.

With an I2C interface for communication, the MCP79402T-I/MS can easily be integrated into microcontroller-based systems. The device supports a clock frequency of up to 400 kHz, allowing for quick data transfers. Its digital trimming feature enables compensation for crystal tolerance and temperature, ensuring accurate timekeeping over a wide temperature range (-40°C to +85°C).

Additional functionalities include programmable clock output for peripheral devices, an alarm function that can be set for a specific time or date, and a power-on reset (POR) signal which ensures reliable device reset. The MCP79402T-I/MS is suitable for a wide range of applications including smart energy, home appliances, automotive electronics, and consumer electronics that require accurate timekeeping, such as digital clocks, timers, and data loggers.

Overall, the MCP79402T-I/MS from Microchip Technology is a versatile and reliable solution for adding real-time clock/calendar capabilities to your next project or product.