X1227S8ZT1

Overview

The X1227S8ZT1 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock/calendar functionality with alarm, leap year, watchdog timer, and monitor features. The device supports I2C and 2-wire serial interfaces for communication. It operates within a supply voltage range of 2.7V to 5.5V on the main supply and 1.8V to 5.5V on the battery input. Timing current consumption ranges from 10µA to 20µA at 2.7V to 5V. The component is housed in an 8-SOIC package (0.154" width) and functions across a temperature range of -40°C to 85°C.

Feature Summary

• Integrated Real-Time Clock with Calendar, Alarm, Leap Year, Watchdog Timer, and Monitor capabilities
• Dual interface support: I2C and 2-Wire Serial
• Wide operating voltage range: 2.7V to 5.5V (VCC), 1.8V to 5.5V (VBAT)
• Low power consumption: 10µA to 20µA timing current

Applications

• Industrial systems requiring precise timekeeping
• Consumer electronics with battery backup needs
• Automotive infotainment or control units
• Network equipment synchronization

Procurement Notes

The X1227S8ZT1 is listed as obsolete or end-of-life by the manufacturer. Verification of availability through authorized distributors is required, as stock levels fluctuate. Buyers should confirm the specific suffix 'T1' indicates tape-and-reel packaging if high-volume surface mount assembly is intended. Alternative components may need evaluation due to discontinuation status.

Selection Notes

Select this part when both I2C and 2-Wire Serial compatibility is needed for legacy or mixed-interface designs. Ensure the system design accommodates the 8-SOIC footprint. Verify that the 10µA–20µA current draw fits the battery life requirements. Check if the -40°C to 85°C industrial temperature range meets environmental specifications.

Part Context

This component belongs to the X1227 series of real-time clocks from Renesas. It shares functional similarities with other parts in the family but differs in package type and interface options. The 'S8' designation typically refers to the SOIC-8 package, while 'Z' often denotes lead-free compliance. The 'T1' suffix specifies the reel packaging format.

Replacement Considerations

Due to the obsolete status, direct pin-to-pin replacements should be verified against current Renesas portfolios or third-party RTCs supporting dual I2C/2-Wire interfaces. Evaluate electrical compatibility regarding voltage levels and current consumption before substitution.