The Maxim Integrated DS1305E+T is a feature-rich serial alarm real-time clock (RTC) that provides a comprehensive timekeeping solution for a wide array of applications. This device is designed to maintain accurate time and date information, ranging from seconds to years, and it includes additional functionalities such as dual programmable alarm settings and a programmable square-wave output.

Key Features

• Serial Interface: The DS1305E+T communicates with microcontrollers via a simple serial interface, which is compatible with SPI (Serial Peripheral Interface) modes 0 and 3.
• Dual Programmable Alarms: It offers two alarm registers that can be programmed to trigger on a combination of seconds, minutes, hours, day, date, month, or year.
• Programmable Square-Wave Output: Users can configure the square-wave output to support frequencies of 1Hz, 4.096kHz, 8.192kHz, or 32.768kHz, which can be used for various timing and control applications.
• Automatic Power-Fail Detect: The built-in power-fail detect circuitry automatically switches to backup battery power when the main power supply drops below a designated threshold, ensuring uninterrupted timekeeping.
• Low Power Consumption: Designed for energy efficiency, the DS1305E+T is suitable for battery-powered applications, with a low power consumption that extends battery life.
• Extended Temperature Range: This device operates over an industrial temperature range, making it reliable under varying environmental conditions.

Applications

The DS1305E+T is ideal for a multitude of applications that require accurate real-time clocks with alarm functions. These include, but are not limited to:

• Embedded Systems
• Utility Meters
• Security Systems
• Medical Devices
• Industrial Control Systems

Technical Specifications

With a voltage range of 2.0V to 5.5V, the DS1305E+T is versatile in its power requirements. It is available in a surface-mount package, which allows for compact PCB design. The RTC is also fully accessible in battery-backup mode, with the added assurance of a long battery shelf life due to its low power consumption.

Ordering Information

The DS1305E+T is available for order in a tape and reel format, facilitating automated assembly processes for high-volume production requirements.