Texas Instruments

BQ4802YDSH

BQ4802YDSH Description

The BQ4802YDSH is a highly integrated Real-Time Clock (RTC) and calendar IC designed by Texas Instruments. This device offers a comprehensive set of features tailored for applications requiring precise timekeeping and calendar functions. The BQ4802YDSH operates within a temperature range of 0°C to 70°C, making it suitable for a variety of industrial and consumer applications. It is designed for surface mount technology, ensuring ease of integration into modern electronic systems.

The BQ4802YDSH is powered by a supply voltage range of 4.5V to 5.5V, with a typical timekeeping current of 1.5mA, ensuring efficient power consumption. The device also supports a battery backup supply voltage range of 2.4V to 4V, providing reliable timekeeping even during power outages. The BQ4802YDSH features a parallel interface, facilitating straightforward communication with host systems.

BQ4802YDSH Features

The BQ4802YDSH stands out with its advanced feature set, which includes:

• Alarm Functionality: Allows the setting of specific times to trigger alarms, enhancing the device's utility in scheduling and event management.
• Daylight Savings Time Adjustment: Automatically adjusts the clock to account for daylight savings, reducing manual intervention.
• Leap Year Compensation: Ensures accurate date calculations over extended periods, including leap years.
• Supervisor Functions: Monitors system power and provides status information, enhancing system reliability.
• Watchdog Timer: Prevents system lockups by resetting the system if it becomes unresponsive, critical for maintaining system stability.

The BQ4802YDSH also supports both 12-hour and 24-hour time formats (HH:MM:SS), providing flexibility in time display options. The device is packaged in a tube, ensuring robust handling and storage. It is REACH unaffected and RoHS3 compliant, adhering to stringent environmental and safety standards.

BQ4802YDSH Applications

The BQ4802YDSH is ideal for applications requiring precise and reliable timekeeping and calendar functions. Its features make it particularly suitable for:

• Industrial Control Systems: Where accurate timekeeping is crucial for process control and monitoring.
• Consumer Electronics: Such as digital clocks, home automation systems, and smart appliances.
• Telecommunications: For network timing and synchronization.
• Embedded Systems: In devices requiring robust time management and system supervision.

The BQ4802YDSH's alarm and watchdog timer features make it an excellent choice for systems requiring automated event triggering and fault tolerance. Its ability to handle both 12-hour and 24-hour time formats ensures compatibility with a wide range of user preferences and system requirements.

Conclusion of BQ4802YDSH

The BQ4802YDSH from Texas Instruments is a versatile and reliable RTC and calendar IC, offering a comprehensive set of features for precise timekeeping and calendar functions. Its robust feature set, including alarm, daylight savings, leap year compensation, supervisor functions, and watchdog timer, makes it a superior choice over similar models. The device's compatibility with both 12-hour and 24-hour time formats, along with its REACH unaffected and RoHS3 compliant status, ensures it meets the highest environmental and safety standards.

Despite being marked as obsolete, the BQ4802YDSH remains a valuable component for applications requiring reliable time management and system supervision. Its surface mount design and operating temperature range of 0°C to 70°C make it suitable for a wide range of industrial and consumer applications. For systems needing precise and dependable timekeeping, the BQ4802YDSH is an excellent choice.