DS1302S+

The Analog Devices DS1302S+ is a real-time clock/calendar chip designed for precise timekeeping functions. It manages seconds, minutes, hours, date, month, day of the week, and year, including leap-year compensation valid up to 2100. The chip includes 31 bytes of battery-backed static RAM for data storage.

This device features a simple 3-wire serial interface (CE, I/O, SCLK) that is TTL-compatible, allowing easy communication with most microcontrollers. Data transfer can be performed in single-byte or burst modes. It operates over a voltage range of 2V to 5.5V and consumes very low power, drawing less than 300nA at 2.0V, which extends battery backup run time.

The DS1302S+ is supplied in an 8-SOIC package, minimizing space requirements on printed circuit boards. It has an operating temperature range of 0°C to 70°C, making it suitable for a wide range of applications. Key features include leap year compensation, NVSRAM, and a trickle-charger.

This component is ideal for embedded systems requiring accurate timekeeping, such as data loggers, control systems, and portable devices. Its low power consumption and simple interface make it a versatile choice for designers.