X1227S8-4.5A

Overview

The X1227S8-4.5A is a Real-Time Clock (RTC) manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface-mount package. It operates within a supply voltage range of 1.8V to 5.5V and supports I2C and 2-wire serial interfaces. The device maintains time in HH:MM:SS format (12/24-hour mode) and date in YY-MM-DD-dd format. Key features include alarm functionality, leap year compensation, a monitor, and a watchdog timer. Operating current ranges from 10µA to 20µA at 2.7V to 5V. It functions reliably across a temperature range of -40°C to 85°C.

Feature Summary

• Provides accurate timekeeping with calendar functions including leap year adjustment.
• Integrates programmable alarms and system monitoring capabilities.
• Includes a watchdog timer for enhanced system reliability.

Applications

• Battery-powered portable electronics requiring precise timekeeping
• Industrial control systems needing watchdog protection
• Data logging equipment requiring calendar tracking

Procurement Notes

Verify the specific suffix '4.5A' against official Renesas documentation to confirm threshold or variant specifications, as generic listings may lack detailed electrical parameter validation. Confirm availability status, as this component may be discontinued or subject to lifecycle changes. Ensure the 8-SOIC package dimensions match your PCB footprint requirements before procurement.

Selection Notes

Select this component when a low-power RTC with integrated watchdog and alarm features is required in a compact SOIC package. It is suitable for applications operating between 1.8V and 5.5V. Consider interface compatibility with I2C or 2-wire serial buses. Verify that the -40°C to 85°C operating range meets environmental demands.

Part Context

This part belongs to the X1227 series of real-time clocks from Renesas. These devices are designed for low-power applications requiring reliable time and date tracking. The series typically offers various package options and voltage thresholds to suit different system constraints.

Replacement Considerations

Check for direct pin-to-pin replacements within the X1227 family with compatible voltage thresholds. Verify functional equivalence regarding watchdog timeout periods and alarm configurations before substitution.

FAQ

What interfaces does the X1227S8-4.5A support?

It supports I2C and 2-wire serial interfaces for communication.

Does the device handle leap years automatically?

Yes, it includes automatic leap year compensation functionality.

What is the operating temperature range?

The device operates reliably from -40°C to +85°C.