ISL12029AIB27Z-T

Real Time Clock Overview

The ISL12029AIB27Z-T is a low-power Real Time Clock/Calendar IC featuring an integrated I²C interface and 512x8-bit EEPROM. It operates within a supply voltage range of 2.7V to 5.5V, with battery backup support down to 1.8V. The device includes automatic leap year correction through 2099, two non-volatile alarms, and intelligent battery backup switching. Key features include on-chip oscillator compensation for ±30ppm accuracy, CPU supervisor functions (Power-On Reset, Watchdog Timer), and BlockLock™ protection for the EEPROM memory array.

Real Time Clock Feature Summary

• Integrated 512x8-bit EEPROM with 16-byte page write mode and >2,000,000 cycle endurance
• Intelligent battery backup switching with 800nA typical battery supply current
• On-chip oscillator compensation with 64-position digital trim capacitor for ±30ppm accuracy
• CPU Supervisor functions including Power-On Reset, Low Voltage Sense, and Watchdog Timer

Real Time Clock Applications

• Utility Meters
• HVAC Equipment
• Network Routers, Hubs, Switches, Bridges
• POS Equipment
• Office Automation (Copiers, Fax)

Real Time Clock Procurement Notes

Verify component status as discontinued or end-of-life data may apply. Confirm package type matches design requirements, as this part number specifies the SOIC-14 variant. Ensure ordering suffixes align with specific voltage thresholds and backup switching modes defined in the manufacturer's documentation.

Real Time Clock Selection Notes

Select the ISL12029A variant specifically if VBAT exceeds VDD, as it utilizes Standard Mode settings distinct from the legacy ISL12029. Verify that the required reset voltage threshold and battery trip point match the system power architecture. Ensure external crystal specifications align with the internal compensation network capabilities.

Real Time Clock Part Context

This component belongs to the ISL12029 family of real-time clocks manufactured by Renesas Electronics Corporation (formerly Intersil). The 'A' designation indicates the Standard Mode Power Control Setting, while the 'IB' suffix denotes the 14-lead SOIC package. The '-T' suffix typically indicates tape and reel packaging configuration.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.