ISL12027IB30AZ-T

Real Time Clock Overview

The ISL12027IB30AZ-T is a low-power real-time clock (RTC) and calendar integrated circuit manufactured by Intersil. It features an I2C bus interface, 512-bit EEPROM storage, and intelligent battery backup switching. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. It provides timekeeping in hours, minutes, and seconds, along with calendar data including day of the week, date, month, and year, accurate through 2099 with automatic leap year correction. The component utilizes an external 32.768 kHz crystal for oscillator timing.

Real Time Clock Feature Summary

• Integrated 512x8-bit EEPROM with 16-byte page write mode and block lock protection
• Two non-volatile alarms with repeat mode for periodic interrupts
• On-chip oscillator compensation with 64-position digital trim capacitors
• Intelligent battery backup switching between main power and VBAT

Real Time Clock Applications

• Data logging systems requiring persistent time and event records
• Industrial control equipment needing reliable calendar tracking
• Consumer electronics with battery-backed timekeeping requirements

Real Time Clock Procurement Notes

The ISL12027IB30AZ-T is identified as an End-of-Life (EOL) product. Distribution channels indicate limited availability or discontinuation status. Verification of current stock levels and alternative sourcing strategies is required before procurement planning. Check official manufacturer notices for final obsolescence dates.

Real Time Clock Selection Notes

Select this component when I2C connectivity and onboard EEPROM are necessary for RTC applications. Ensure the design accommodates the SOIC-8 package format. Verify that the system voltage remains within the 2.7 V to 5.5 V operational range. Confirm compatibility with the legacy power control settings if VBAT exceeds VDD conditions are not present.

Real Time Clock Part Context

This part belongs to the ISL12027 series of real-time clocks. It shares core functionalities with variants like the ISL12027IV27AZ but differs in package type (SOIC-8 vs TSSOP-16) and suffix codes indicating specific manufacturing or packaging configurations. The 'T' suffix typically denotes tape and reel packaging.

Real Time Clock Replacement Considerations

As an EOL component, direct substitutes may be limited. Consider the ISL12027A series for standard mode operation if VBAT > VDD conditions apply. Verify pinout and register compatibility with any potential cross-reference parts from Renesas or other manufacturers offering modern RTC solutions.