Texas Instruments

BQ3285ES

BQ3285ES Description

The BQ3285ES is a high-performance clock/calendar Real-Time Clock (RTC) IC designed by Texas Instruments. This device is ideal for applications requiring precise timekeeping and calendar functions. It features a parallel interface and is housed in a 24-pin SOIC package, making it suitable for surface-mount applications. The BQ3285ES operates within a temperature range of 0°C to 70°C and is powered by a supply voltage of 4.5V to 5.5V. Additionally, it supports a battery backup supply voltage ranging from 2.5V to 4V, ensuring continuous operation even during power outages.

BQ3285ES Features

The BQ3285ES offers several advanced features that set it apart from similar RTC ICs. Key features include:

• Alarm Functionality: The BQ3285ES includes an alarm feature that allows users to set specific times for alerts, making it ideal for applications requiring scheduled operations.
• Daylight Savings and Leap Year Support: This RTC IC automatically adjusts for daylight savings and leap years, ensuring accurate timekeeping over long periods.
• NVSRAM: The device incorporates 242 bytes of non-volatile static RAM (NVSRAM), providing additional memory for storing critical data.
• Square Wave Output: The BQ3285ES features a square wave output, which can be used for various timing applications.
• Time Format Flexibility: The RTC supports both 12-hour and 24-hour time formats (HH:MM:SS), offering flexibility in how time is displayed and managed.
• Low Power Consumption: With a maximum timekeeping current of 300µA at 5V, the BQ3285ES is designed for low power consumption, making it suitable for battery-operated devices.
• Compliance and Safety: The BQ3285ES is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards.

BQ3285ES Applications

The BQ3285ES is well-suited for a variety of applications where reliable timekeeping and calendar functions are essential. Specific use cases include:

• Consumer Electronics: Ideal for devices such as digital clocks, alarm clocks, and home automation systems that require accurate timekeeping and calendar functions.
• Industrial Control Systems: Suitable for industrial applications where precise time synchronization is necessary for process control and monitoring.
• Medical Devices: The BQ3285ES can be used in medical equipment that requires accurate time recording for patient monitoring and data logging.
• Telecommunications: The RTC IC can be integrated into telecommunication systems for time-stamping and synchronization purposes.
• Embedded Systems: The device is perfect for embedded systems where a compact and reliable RTC is needed for various time-sensitive operations.

Conclusion of BQ3285ES

The BQ3285ES from Texas Instruments is a robust and versatile RTC IC that offers a comprehensive set of features for precise timekeeping and calendar management. Its low power consumption, extensive memory, and advanced functionalities make it an ideal choice for a wide range of applications. Despite being marked as obsolete, the BQ3285ES remains a reliable option for designers and engineers looking for a high-quality RTC solution.