ISL12027AIB27Z

Real Time Clock Overview

The ISL12027AIB27Z is a low-power real-time clock (RTC) and calendar integrated circuit manufactured by Renesas Electronics under the Intersil brand. It features an I2C bus interface, operating within a supply voltage range of 2.7 V to 5.5 V. The device includes a 512-bit EEPROM with 16-byte page write capability and intelligent battery backup switching. It supports automatic leap year correction through 2099 and offers two non-volatile alarms. The component is housed in an 8-pin SOIC package and operates between -40°C and +85°C.

Real Time Clock Feature Summary

• Integrated 512x8-bit EEPROM with BlockLock protection
• Automatic battery backup switching for continuous timekeeping
• On-chip oscillator compensation with digital trim capacitors
• Two programmable alarms with periodic interrupt modes

Real Time Clock Applications

• Industrial control systems requiring precise time tracking
• Data logging equipment needing non-volatile storage
• Consumer electronics with calendar functionality
• Telecommunications infrastructure timing modules

Real Time Clock Procurement Notes

The ISL12027AIB27Z is listed as End-of-Life (EOL) or obsolete in multiple distributor databases. Verification of current availability requires checking authorized Renesas distributors for remaining stock or approved replacement components. Ensure compliance with RoHS standards as indicated in legacy documentation.

Real Time Clock Selection Notes

Select this component when a combined RTC, calendar, and EEPROM solution is required in an 8-pin package. Verify that the application utilizes the Standard Mode Setting, distinct from the Legacy Mode used in the ISL12027. Confirm I2C compatibility and voltage levels match the system design constraints.

Real Time Clock Part Context

This part belongs to the ISL12027 family of real-time clocks. It is functionally similar to the ISL12027 but differs in power control settings, utilizing Standard Mode rather than Legacy Mode. The 'B' suffix typically denotes the SOIC-8 package variant, while '27' indicates the 2.7V minimum operating voltage threshold.

Real Time Clock Replacement Considerations

Direct substitutes are not explicitly confirmed in public documents due to the EOL status. Engineers should consult Renesas for qualified replacements within the ISL12029 or newer RTC families, ensuring pinout and feature compatibility.