BQ4845YP-A4E3 Product Details

Product Specifications

The BQ4845YP-A4E3 is a sophisticated Real-Time Clock (RTC) integrated circuit that combines the functionality of a clock, calendar, and battery-backed non-volatile (NV) RAM, offering a comprehensive solution for timekeeping and data preservation. Key specifications of this product include:

• Timekeeping Accuracy: Features a high-precision crystal oscillator to maintain accurate time and date.

• Power Supply Voltage: Operates across a supply voltage range of 4.5V to 5.5V, making it suitable for 5V systems.

• Temperature Range: Designed to function within a temperature range of -40°C to +85°C.

• Memory: Comes with integrated battery-backed NV RAM, ensuring data retention during power losses.

• Interface: Utilizes a parallel interface for seamless communication with microprocessors.

• Package Type: Housed in a 24-pin plastic DIP package, ensuring ease of integration into various system designs.

• Additional Features: Includes power-fail detect, an automatic switch to battery backup, programmable alarms, and a watchdog timer for enhanced functionality and reliability.

Product Introduction

The BQ4845YP-A4E3 RTC is designed for applications that require reliable timekeeping, as well as data integrity in the face of power disturbances. Its integrated battery-backed NV RAM makes it a vital component for critical data logging applications, where loss of data can have significant consequences. The addition of programmable alarms and a watchdog timer enables the BQ4845YP-A4E3 to meet the demanding requirements of complex electronic systems, providing both versatility and dependability in its operation. This chip is an exemplary choice for managing time and safeguarding data across a wide range of applications.

Application Scope

The BQ4845YP-A4E3 finds its utility in a diverse array of fields:

• Computing: Essential in servers, desktop computers, and networking hardware to ensure accurate system time and preserve critical data.

• Industrial Systems: Ideal for automation systems, data loggers, and other industrial applications requiring dependable timekeeping and data retention.

• Telecommunications: Used in communication infrastructure for accurate time-stamping, logging, and system health monitoring.

• Medical Devices: Important in diagnostic and patient monitoring equipment where precise timing and data integrity are paramount.

• Energy Management: Suitable for use in energy distribution systems and smart meters where accurate event logging and time-stamping are necessary.

Frequently Asked Questions

Q: How does the BQ4845YP-A4E3 preserve data during power outages?

A: It automatically switches to its battery backup to maintain clock operations and preserve the contents of the NV RAM, ensuring data is not lost during power failures.

Q: What purposes do the programmable alarms serve?

A: The programmable alarms can be configured to trigger on specific dates and times, allowing for the scheduling of events, reminders, or system functions without continuous processor intervention.

Q: Is it possible to disable the watchdog timer in the BQ4845YP-A4E3?

A: Yes, the watchdog timer in the BQ4845YP-A4E3 can typically be enabled or disabled based on the application's requirements, providing flexibility in system design.