ISL12027IB30AZ

Real Time Clock Overview

The ISL12027IB30AZ 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 registers for date, month, year, and day of the week, accurate through 2099 with automatic leap year correction.

Real Time Clock Feature Summary

• I²C Bus Interface: Supports standard communication protocols for system integration.
• Integrated EEPROM: Includes 512x8-bit non-volatile memory with 16-byte page write mode and block lock protection.
• Intelligent Battery Backup: Automatically switches between main power and backup sources (battery or supercapacitor).
• Oscillator Compensation: Features internal feedback resistors, compensation capacitors, and digital frequency adjustment settings.

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping.
• Consumer electronics with data retention needs.
• Telecommunications equipment needing calendar functions.

Real Time Clock Procurement Notes

Verify component authenticity and check for End-of-Life (EOL) status before procurement. Confirm package type (SOIC-8) and suffix specifications match design requirements. Ensure supply chain stability due to potential discontinuation risks associated with legacy Intersil products.

Real Time Clock Selection Notes

Select this component when I²C connectivity and integrated EEPROM are required. Compare against ISL12027A variants if VBAT > VDD conditions exist, as power control settings differ. Verify oscillator compensation needs against application accuracy requirements.

Real Time Clock Part Context

Part of the ISL12027 family of real-time clocks. Shares core functionality with ISL12027IV27AZ but differs in package (SOIC-8 vs TSSOP-8) and specific electrical characteristics defined by the IB30 suffix.

Real Time Clock Replacement Considerations

Direct substitutes may be limited due to EOL status. Consider ISL12027A series for similar functionality with updated power control modes. Verify pin compatibility and software register mapping before substitution.