BQ4847MT Product Details

Product Specifications

The BQ4847MT is a robust Real-Time Clock (RTC) integrated circuit with a wealth of features designed for maintaining accurate timekeeping and system integrity across various applications. Developed by Texas Instruments, this RTC module stands out for its integration of a full-function clock and calendar, memory backup, and additional protective features. Key specifications include:

• Timekeeping Accuracy: Utilizes a precision crystal oscillator to ensure reliable time and date tracking, crucial for applications where timing precision is paramount.

• Power Supply Voltage: Designed for operation with a supply voltage range of 4.5V to 5.5V, accommodating a variety of system power requirements.

• Temperature Range: Capable of reliable performance across a temperature range from -40°C to +85°C, making it suitable for diverse operating environments.

• Memory Backup: Features integrated battery-backed SRAM for critical data retention during power interruptions, ensuring continuous data integrity.

• Interface: Provides a multiplexed bus interface, facilitating seamless integration with microprocessors and reducing the need for additional interfacing components.

• Package Type: Offered in a DIP (Dual In-line Package), which is conducive to easy installation and removal in various system designs.

• Additional Features: Equipped with watchdog timer, power-fail detection, battery switch-over, and programmable alarm functions, enhancing system reliability and management.

Product Introduction

Engineered for applications that demand not just accurate timekeeping but also robust system functionality, the BQ4847MT RTC module is an ideal solution for sophisticated electronic systems. Its comprehensive suite of features, including memory backup and additional protective functions, makes it particularly well-suited for industrial automation, telecommunications, automotive systems, and consumer electronics. The device’s design emphasizes reliability and flexibility, making it a versatile component for complex designs that require precision and durability.

Application Scope

This RTC module is well-suited for a wide array of applications:

• Industrial Automation: Perfect for control systems, data loggers, and monitoring equipment, where accurate timing and operational reliability are critical.

• Telecommunications Equipment: Essential for network infrastructure devices, including routers and switches, requiring precise timekeeping for logging and integrity management.

• Automotive Systems: Suitable for vehicle electronics that rely on accurate timing, such as event data recorders and navigation systems.

• Consumer Electronics: Ideal for smart home devices, wearables, and other personal electronics that benefit from precise timekeeping.

• Medical Devices: Critical for patient monitoring systems and medical recorders where accurate timing is essential for data collection and patient care.

Frequently Asked Questions

Q: How does the BQ4847MT maintain accurate timekeeping?

A: It employs a high-precision crystal oscillator to ensure consistent and accurate tracking of time and date.

Q: What makes the BQ4847MT suitable for systems requiring data integrity during power outages?

A: Its integrated battery-backed SRAM preserves data during power interruptions, ensuring data integrity and uninterrupted system functionality.

Q: Can the watchdog timer and programmable alarm be customized?

A: Yes, the BQ4847MT’s watchdog timer and programmable alarm can be configured to meet specific system requirements, providing flexibility in system design and operation.