X1228S14I

Description：IC RTC CLK/CALENDAR I2C 14SOIC
Series：-

SKU:77f937a94484 Category: Real Time Clocks Brand: Renesas Electronics Corporation

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Product introduction

Product Detailed Parameters

Description：IC RTC CLK/CALENDAR I2C 14SOIC
Series：-
Package：Tube
Mfr：Renesas Electronics Corporation
Type：Clock/Calendar
Features：Alarm, Leap Year, Supervisor, Watchdog Timer
Memory Size：-
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：I2C, 2-Wire Serial
Voltage - Supply：2.7V ~ 5.5V
Voltage - Supply, Battery：1.8V ~ 5.5V
Current - Timekeeping (Max)：10µA ~ 20µA @ 2.7V ~ 5V
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：14-SOIC (0.154", 3.90mm Width)
Supplier Device Package：14-SOIC

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X1228S14I

Overview

The X1228S14I is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock/calendar functionality via an I2C, 2-wire serial interface. The device operates within a supply voltage range of 2.7V to 5.5V and supports battery backup from 1.8V to 5.5V. Timekeeping current consumption ranges from 10µA to 20µA at 2.7V to 5V. It features alarm capabilities, leap year compensation, supervisor functions, and a watchdog timer. The component is housed in a 14-SOIC package with a width of 3.90mm and is rated for operation between -40°C and 85°C.

Feature Summary

Integrated RTC with HH:MM:SS time format (12/24 hour) and YY-MM-DD-dd date format
Supports I2C, 2-wire serial communication interface
Includes alarm, leap year, supervisor, and watchdog timer features
Operates on 2.7V ~ 5.5V main supply and 1.8V ~ 5.5V battery backup

Applications

Systems requiring precise timekeeping and calendar tracking
Industrial equipment needing watchdog timer supervision
Devices utilizing I2C bus for low-pin-count real-time clock integration

Procurement Notes

The X1228S14I is classified as obsolete and no longer manufactured by Renesas Electronics Corporation. Verification of availability should focus on third-party distributors holding remaining stock or approved replacement components. Compliance status indicates the part does not meet RoHS specifications. Designers must account for end-of-life status when planning long-term production runs.

Selection Notes

Select this component only if legacy compatibility with the 14-SOIC package and specific X1228 family features is required. Verify that the non-RoHS compliant status aligns with target market regulations. Consider the maximum timekeeping current of 20µA for power budget calculations. Ensure the I2C interface voltage levels are compatible with the host microcontroller.

Part Context

This part belongs to the X1228 series of real-time clock ICs. It shares functional similarities with other variants such as the X1228S14I-2.7 and the X1228V14IZ-2.7A, differing primarily in packaging (SOIC vs TSSOP) and compliance status. The series is designed for applications requiring standalone timekeeping with minimal external components.