Maxim Integrated's DS1347T+: High-Performance SPI/I²C RTC with Trickle Charger

The DS1347T+ from Maxim Integrated is a versatile real-time clock (RTC) module that provides a comprehensive timekeeping solution for a wide range of applications. It is designed to maintain accurate time and date information, featuring a full binary-coded decimal (BCD) clock/calendar with 56 bytes of NV SRAM. This high-performance RTC is perfect for systems that require reliable timekeeping, even in the absence of power.

One of the key features of the DS1347T+ is its dual-interface capability. It supports both Serial Peripheral Interface (SPI) and Inter-Integrated Circuit (I²C) communication, making it highly flexible for integration into various system designs. This dual-interface functionality allows designers to choose the most suitable communication protocol for their application needs.

The device includes a built-in power-sense circuit that detects power failures and automatically switches to the backup energy source, ensuring the continuity of timekeeping operations. This is particularly beneficial for applications where maintaining accurate time is critical, such as data logging systems, security systems, and network servers.

The DS1347T+ also features an integrated trickle-charger for the backup energy source, which can be a rechargeable battery or a supercapacitor. This trickle-charging capability ensures that the backup energy source remains charged, providing long-term reliability of the timekeeping function without the need for regular maintenance or battery replacement.

Additional functionalities of this RTC include two time-of-day alarms, a programmable square-wave output, and a 32kHz output clock, which can be used for various timing-related functions in a system. The device's register map is user-friendly, and it offers a clock halt flag that allows the user to discern if the clock has lost power and may need synchronization.

Encased in an 8-pin SO (DS1347T+) package, this RTC is not only highly functional but also space-efficient, making it an excellent choice for space-constrained applications. Whether it's for consumer electronics, industrial systems, or portable devices, the DS1347T+ from Maxim Integrated is a robust and reliable timekeeping solution that ensures your systems stay on schedule.