X1228S14IZ-4.5A

Overview

The X1228S14IZ-4.5A is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, belonging to the X1228 family. It provides clock/calendar functionality with 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. It features a 14-SOIC package (0.154 inch width). Key electrical parameters include a maximum current consumption of 10µA to 20µA at 2.7V to 5V and an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated Real-Time Clock (RTC) with clock/calendar capabilities
• I2C, 2-wire serial interface for communication
• Supply voltage: 2.7V ~ 5.5V; Battery voltage: 1.8V ~ 5.5V
• Features include alarm, leap year compensation, watchdog timer, and supervisor

Applications

• Systems requiring precise timekeeping via I2C interface
• Industrial equipment operating in wide temperature ranges (-40°C to 85°C)
• Battery-backed real-time data logging applications

Procurement Notes

The X1228S14IZ-4.5A is listed as obsolete and no longer manufactured. Verification of availability should focus on replacement components or surplus stock. Ensure compliance with RoHS status, which is noted as non-compliant in available records. Confirm package dimensions and pinout compatibility before procurement.

Selection Notes

Select this component only if legacy support for the X1228 family is required. Verify that the 14-SOIC package fits the design constraints. Consider the I2C interface speed and voltage levels against the system's microcontroller capabilities. Check for end-of-life notices and plan for migration to active alternatives if long-term supply is critical.

Part Context

The X1228 series includes various RTC variants with different packages and suffixes. The 'Z' typically indicates lead-free status, while 'I' denotes industrial temperature range. The base model X1228 is referenced in related documentation, indicating it is part of a broader family of serial EEPROM and RTC combinations, though this specific part focuses on RTC functions.

Replacement Considerations

Analog Devices Inc./Maxim Integrated DS1388Z-5+ is identified as a similar substitute. Verify functional compatibility regarding register maps and interface timing before substitution.