Maxim Integrated DS1340Z-3+ Real-Time Clock

The DS1340Z-3+ from Maxim Integrated is a low-current, 256-byte, I²C real-time clock (RTC) with a built-in trickle charger. This high-precision timekeeping device is an ideal solution for a wide range of applications that require accurate timekeeping and a minimal power footprint, such as embedded systems, utility meters, and industrial controllers.

Featuring a built-in power-sense circuit, the DS1340Z-3+ monitors VCC for an out-of-tolerance condition. When such a condition occurs, the device automatically switches to the backup supply, ensuring uninterrupted timekeeping and data retention. This functionality is critical for applications that cannot afford to lose time information during power outages or system maintenance.

The device supports a battery backup input that allows for long-term reliability. The integrated trickle charger ensures that the backup battery remains charged, extending the life of the battery and maintaining system integrity over extended periods. The RTC provides seconds, minutes, hours, day, date, month, and year information, with the added benefit of automatic leap-year compensation valid up to the year 2100.

Communication with the DS1340Z-3+ is established via an I²C serial interface, which enables easy integration with most microcontrollers and processors. The device is housed in an 8-pin SOIC package, making it compact and suitable for space-constrained applications.

Key features of the DS1340Z-3+ include:

• Low energy consumption, ideal for battery-powered applications.
• 256-byte, battery-backed, nonvolatile (NV) RAM for data storage.
• Automatic switch to backup supply on power failure.
• Trickle charge capability to maintain battery charge level.
• Accurate timekeeping with leap year compensation.
• Simple I²C interface for easy integration.
• Compact 8-pin SOIC packaging.

With its robust feature set, the Maxim Integrated DS1340Z-3+ RTC offers a reliable and efficient solution for maintaining accurate time in your electronic systems, even in the event of a primary power loss.