The RX-8025T is a real-time clock (RTC) module manufactured by Epson. It's a compact and low-power device designed to provide accurate timekeeping in a variety of applications. The module integrates a 32.768 kHz crystal oscillator, which contributes to its precise timekeeping capabilities. The RX-8025T is a popular choice for applications where maintaining accurate time and date information is crucial, even when the main system power is off.

Applications

• Industrial control systems: Used for time-stamping events and scheduling tasks.
• Point-of-sale (POS) terminals: Provides accurate time for transaction logging.
• Consumer electronics: Found in devices like digital cameras, audio players, and set-top boxes for timekeeping purposes.
• Metering devices: Accurately records time for energy consumption monitoring.
• Automotive applications: Integrated into car navigation and infotainment systems.

Features

• Integrated 32.768 kHz crystal oscillator: Ensures accurate and stable timekeeping.
• I2C serial interface: Allows easy communication with a microcontroller or other system components.
• Low power consumption: Extends battery life in portable applications.
• Small package size: Enables integration into compact devices.
• Wide operating voltage range: Offers flexibility in system design.
• Temperature compensation: Improves accuracy over a wide temperature range.
• Backup battery switchover function: Automatically switches to a backup battery when the main power supply fails, preserving time and date information.
• Alarm function: Can be programmed to generate an interrupt at a specific time or date.
• Timer function: Provides a programmable timer for various applications.

Benefits

• Accurate timekeeping: Provides reliable time and date information.
• Reduced system complexity: Integrates all necessary components for timekeeping into a single module.
• Lower power consumption: Extends battery life in portable devices.
• Easy integration: Simple I2C interface simplifies system design.
• Improved system reliability: Backup battery switchover ensures continuous operation even during power outages.

Additional Details

The RX-8025T typically operates with a supply voltage in the range of 1.8V to 5.5V. It supports the I2C serial communication protocol for data transfer. The module is available in various package options, including small surface-mount packages. The operating temperature range is typically between -40°C and +85°C. The accuracy of the RTC is influenced by factors such as the crystal oscillator frequency tolerance and temperature variations. However, the integrated temperature compensation feature helps to minimize the impact of temperature changes on accuracy. Data is stored in registers that can be accessed through the I2C interface. The device also offers programmable interrupt outputs which can be used to trigger external events.