X1227V8Z

Overview

The X1227V8Z is a Real-Time Clock (RTC) manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface-mount package. It provides clock/calendar functionality with HH:MM:SS and YY-MM-DD-dd formats via an I2C 2-wire serial interface. The device supports 12/24-hour time modes and includes features such as alarms, leap year compensation, a watchdog timer, and a monitor. It operates on a supply voltage of 1.8V to 5.5V, with typical current consumption ranging from 10µA to 20µA at 2.7V to 5V across a temperature range of -40°C to 85°C.

Feature Summary

• Integrated Real-Time Clock with Calendar (YY-MM-DD-dd) and Alarm functions
• I2C 2-Wire Serial Interface for communication
• Watchdog Timer and Monitor capabilities
• Wide Supply Voltage Range: 1.8V to 5.5V

Applications

• Data logging systems requiring precise timestamping
• Battery-backed embedded devices needing timekeeping
• Industrial equipment with watchdog monitoring requirements

Procurement Notes

Verify the specific suffix 'V8Z' against official Renesas documentation to confirm pinout and voltage specifications, as suffixes often denote package or temperature variations. Check product status, as RTC components may be subject to end-of-life notices. Ensure compatibility with system I2C pull-up resistors and voltage levels before procurement.

Selection Notes

Select this component when a low-power, non-volatile RTC with integrated watchdog and alarm features is required. Confirm that the 8-SOIC package fits the PCB layout constraints. Verify that the I2C address and timing parameters meet the master controller's specifications. Consider the 1.8V minimum operating voltage if the system uses low-voltage logic.

Part Context

The X1227 series represents Renesas' line of real-time clocks designed for general-purpose applications. The X1227V8Z specifically utilizes the SOIC-8 package variant. This family is distinct from digital potentiometers (like the X9317) and microcontrollers (like the R5F101), focusing solely on timekeeping and system monitoring tasks.

Replacement Considerations

Consult Renesas datasheets for direct pin-to-pin replacements within the X1227 family, such as variants with different suffixes indicating package changes. Cross-reference with other manufacturers' I2C RTCs only if electrical parameters and pinouts are verified identical.