X1228S14Z-2.7

Overview

The X1228S14Z-2.7 is an I2C Real-Time Clock (RTC) and calendar integrated circuit manufactured by Renesas Electronics Corporation. It tracks time in hours, minutes, and seconds, along with day of the week, date, month, and year, with automatic leap year correction through 2099. The device features a 2-wire serial interface supporting data transfer rates up to 400kHz. It operates within a supply voltage range of 2.7V to 5.5V and includes battery-backed SRAM for data retention. The component is housed in a 14-SOIC package.

Feature Summary

• I2C Interface: Supports standard and fast mode communication at up to 400kHz.
• Calendar Functionality: Tracks date, day, month, and year with automatic leap year correction valid through 2099.
• Battery Backup: Maintains timekeeping and SRAM data with a separate battery supply ranging from 1.8V to 5.5V.
• Low Power Consumption: Typical current consumption is 10µA to 20µA during timekeeping operations.

Applications

• Data logging systems requiring precise timestamping.
• Industrial control equipment needing real-time clock synchronization.
• Consumer electronics with calendar and alarm functions.

Procurement Notes

Verify the specific suffix 'Z' against official Renesas documentation to confirm RoHS compliance status, as generic listings may vary. Confirm package dimensions for the 14-SOIC variant match design requirements. Check for end-of-life notices or obsolescence warnings prior to procurement, as availability may be limited.

Selection Notes

Select this component when an I2C-compatible RTC with non-volatile memory is required. Ensure the system voltage supports the 2.7V minimum operating level. Verify that the 14-SOIC footprint fits the PCB layout constraints. Consider the -40°C to +85°C industrial temperature range if operating in harsh environments.

Part Context

This part belongs to the X1228 family of real-time clocks. It is functionally compatible with other industry-standard RTCs such as the Maxim DS13xx series, facilitating drop-in replacements in existing designs. The S14 designation typically indicates the SOIC package type.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult Renesas application notes for pin-compatible alternatives or verify compatibility with similar I2C RTCs like the DS1388 series based on electrical specifications.