X1227V8-2.7

Overview

The X1227V8-2.7 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, housed in an 8-TSSOP package. It operates within a supply voltage range of 2.7V to 5.5V and supports I2C 2-wire serial interface communication. The device provides timekeeping with HH:MM:SS format (12/24 hour) and date tracking in YY-MM-DD-dd format. Key features include alarm functionality, leap year compensation, CPU supervisor, and watchdog timer capabilities. Maximum current consumption for timekeeping is specified as 10µA to 20µA at 2.7V to 5V. The component is rated for operation between -40°C and 85°C.

Feature Summary

• Integrated real-time clock and calendar functions with non-volatile memory support
• Includes hardware-based CPU supervisor and watchdog timer for system reliability
• Supports I2C 2-wire serial interface for efficient data exchange
• Provides programmable alarms and automatic leap year correction

Applications

• Embedded systems requiring precise timekeeping and date tracking
• Industrial control units needing CPU supervision and reset management
• Data logging devices utilizing internal EEPROM for storage
• Consumer electronics with low-power real-time clock requirements

Procurement Notes

Verify the specific suffix variant against official Renesas documentation to ensure compatibility with required voltage ranges and package types. Confirm end-of-life status or obsolescence notices prior to procurement, as availability may be limited. Cross-reference pinout configurations with target PCB layouts to prevent interface mismatches during integration.

Selection Notes

Select this component when a combined RTC, EEPROM, and supervisor solution is required in a compact 8-pin package. Ensure the application environment stays within the specified -40°C to 85°C operating temperature range. Verify that the host microcontroller supports the I2C protocol for proper communication. Consider power consumption constraints given the standby current specifications.

Part Context

This part belongs to the X1227 series of real-time clocks from Renesas, designed for applications needing integrated timekeeping, memory, and system monitoring. It complements other Renesas timing solutions by offering a multifunctional approach in a small form factor. The series targets cost-sensitive designs requiring reliable time management without external components.

Replacement Considerations

Check for direct substitutes such as the X1227S8IZ-2.7 or X1227V8-2.7A if pinout and feature parity are confirmed. Evaluate alternative RTCs with similar I2C interfaces and supervisor functions if this specific model is unavailable. Ensure any replacement maintains the same voltage and temperature specifications.