ISL12028IB27Z-T

Real Time Clock Overview

The ISL12028IB27Z-T is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics under the Intersil brand. It features an I2C bus interface and provides calendar and timekeeping functions with a date format of YY-MM-DD-dd and a 24-hour HH:MM:SS time format. The device includes 512 bytes of EEPROM for data storage and incorporates a backup switching mechanism to maintain operation during power transitions. It operates within a supply voltage range of 2.7 V to 5.5 V and supports surface mount installation in a SOIC-14 package, functioning reliably across a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• I2C Bus Interface for digital communication
• Integrated 512 Byte EEPROM for non-volatile data storage
• Hardware Backup Switching for seamless power transition management
• Calendar and Timekeeping with Alarm, Interrupt, and Timer capabilities

Real Time Clock Applications

• Industrial systems requiring precise time synchronization
• Consumer electronics with battery-backed clock requirements
• Data logging equipment needing persistent timestamp storage

Real Time Clock Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via official datasheets. Check current availability as supply may be limited or subject to factory special orders. Ensure packaging specifications match design requirements.

Real Time Clock Selection Notes

Select this component when an I2C-compatible RTC with significant onboard EEPROM storage is required. Verify that the SOIC-14 package fits the PCB layout constraints. Ensure the operating environment stays within the specified -40°C to +85°C temperature range and the supply voltage remains between 2.7 V and 5.5 V.

Real Time Clock Part Context

This part belongs to the ISL12028A series of real-time clocks. It shares functional similarities with other models in the family but is distinguished by its specific pinout, package type (SOIC-14), and EEPROM capacity. It serves as a dedicated timing solution for embedded applications requiring reliable calendar tracking and data retention.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative RTCs from the same manufacturer only if they share identical electrical parameters, pin configurations, and software compatibility.