RX-8025SAAC0 PURE SN

Real Time Clock Overview

The EPSON RX-8025SAAC0 PURE SN is a Real-Time Clock (RTC) IC from the RX-8025SA series, designed for precise timekeeping in electronic systems. It features an I2C bus interface and operates within a supply voltage range of 1.7V to 5.5V. The device integrates a 32.768kHz crystal oscillator with high precision adjustment capabilities, achieving a typical accuracy of ±5ppm. It supports date formats including YY-MM-DD-dd and time formats such as HH:MM:SS. Key electrical parameters include a maximum timing current of 1.2µA to 1.8µA at 3V to 5V and an operating temperature range of -40°C to +85°C. The component is housed in a 14-SOP package.

Real Time Clock Feature Summary

• High Precision Oscillator: Integrates a 32.768kHz crystal with fixed voltage drive for stability against voltage fluctuations, offering ±5ppm accuracy.
• I2C Interface: Supports standard I2C communication protocols for efficient data exchange with host microcontrollers.
• Comprehensive Timekeeping: Provides clock/calendar functions with configurable alarm timers and interrupt outputs.
• Low Power Consumption: Maintains low standby current (1.2µA ~ 1.8µA) suitable for battery-backed applications.

Real Time Clock Applications

• Electric Meters
• Gas Meters
• Industrial Control Systems
• Security Systems

Real Time Clock Procurement Notes

Verify the specific suffix 'AC0' against official Epson documentation to confirm packaging details, as variations may exist between bulk, cut tape, or reel configurations. Ensure compatibility with the target system's I2C voltage levels given the 1.7V to 5.5V operating range. Check for RoHS3 compliance status if required by regional regulations. Confirm availability through authorized distributors due to potential supply chain constraints common in RTC components.

Real Time Clock Selection Notes

Select this model when high frequency stability (±5ppm) is critical for long-term timekeeping accuracy without external temperature compensation. The 14-SOP package is suitable for applications requiring robust surface-mount assembly. Consider the I2C interface speed limits and ensure the host controller supports the required protocol. Compare with other RX-8025SA variants if different packaging or accuracy specifications are needed.

Real Time Clock Part Context

This part belongs to the Epson RX-8025SA family of real-time clocks, which are known for integrating high-precision crystals directly onto the chip. The 'SA' designation typically refers to the SOP-14 package format. Variants within this family differ primarily in accuracy grades (e.g., AA vs AC) and packaging types (tube vs reel). This specific model represents a version optimized for general industrial and metering applications.

Real Time Clock Replacement Considerations

Direct replacements within the same family include RX-8025SA:AA or RX-8025SA:AC0 depending on the required accuracy and packaging. Verify pinout compatibility and register map consistency before substitution. Other Epson RTCs like the RX-8025T offer similar functionality but may have different interface options or package sizes.