X1227V8-4.5A

Overview

The X1227V8-4.5A is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, formerly Intersil. It provides precise timekeeping and calendar functions via an I²C serial interface. The device operates within a supply voltage range of 2.0 V to 5.5 V and supports temperatures from -40°C to +85°C. It features an 8-pin TSSOP package. Key specifications include a 32.768 kHz crystal oscillator input, binary-coded decimal output, and a backup battery input for continuous operation during main power loss.

Feature Summary

• Provides accurate clock and calendar functionality with leap year compensation up to the year 2100
• Includes programmable square wave output and alarm capabilities for system wake-up events
• Utilizes a standard two-wire I²C serial interface for simple communication and data access
• Maintains timekeeping continuity through a dedicated backup battery pin during primary power failure

Applications

• Industrial control systems requiring precise timestamping
• Consumer electronics needing real-time clock integration
• Automotive infotainment and monitoring units
• Data logging devices requiring calendar tracking

Procurement Notes

Verify the specific suffix 'V8' confirms the 8-TSSOP package variant. Ensure the '4.5A' designation matches the required temperature grade and operating voltage specifications for your target application environment. Cross-reference the manufacturer part number with official Renesas documentation to confirm current production status and availability channels.

Selection Notes

Select this component when a low-pin-count RTC with I²C compatibility is required. It is suitable for designs needing basic calendar functions without complex microcontroller overhead. Consider the operating temperature range and supply voltage limits to ensure compatibility with the host system's power rails and environmental conditions.

Part Context

This part belongs to the X1227 family of real-time clocks, originally developed by Intersil before its acquisition by Renesas. These devices are designed for cost-effective timekeeping solutions in embedded systems. The X1227 series is widely used in applications where maintaining accurate date and time information is critical for system operation and data integrity.

Replacement Considerations

The X1227V8I-4.5A is an industrial temperature grade variant of the same core function. Check datasheets for pinout and register compatibility before substituting other RTC models such as the DS1307 or PCF8523, as interface protocols may differ.