ISL12029IB30AZ-T

Real Time Clock Overview

The ISL12029IB30AZ-T is a low-power Real Time Clock/Calendar with I2C bus interface and integrated 512x8-bit EEPROM. It features automatic leap year correction through 2099, two non-volatile alarms, and intelligent battery backup switching. The device includes on-chip oscillator compensation for ±30ppm accuracy and CPU supervisor functions such as Power-On Reset and Watchdog Timer. Operating from 2.7V to 5.5V with a battery supply down to 1.8V, it utilizes a 14-lead SOIC package in tape and reel format.

Real Time Clock Feature Summary

• Integrated 512x8-bit EEPROM with BlockLock protection and >2,000,000 cycle endurance
• Two programmable alarms with periodic interrupt capability
• On-chip oscillator compensation with 64-position digital trim
• CPU Supervisor functions including Power-On Reset and Watchdog Timer

Real Time Clock Applications

• Utility Meters
• HVAC Equipment
• Network Routers and Switches
• POS Equipment
• Home Appliances

Real Time Clock Procurement Notes

Verify the VRESET threshold of 3.09V matches system requirements. Confirm the 14-lead SOIC package and tape and reel packaging align with assembly capabilities. Ensure the legacy mode power control settings are compatible with the design, as this variant differs from the ISL12029A standard mode.

Real Time Clock Selection Notes

Select this part when a 3.09V reset threshold is required. The 'IB' suffix indicates the SOIC package, while '30' specifies the reset voltage. The 'AZ' denotes Pb-free/RoHS compliance. The '-T' suffix confirms tape and reel delivery. Verify compatibility with existing I2C bus speeds up to 400kHz.

Real Time Clock Part Context

This component belongs to the ISL12029 family of real-time clocks. The specific suffix '30' differentiates it by setting the VRESET threshold to approximately 3.09V, compared to other variants like IB27 (2.63V) or IB (4.38V). It uses the Legacy Mode Setting for power control, distinct from the ISL12029A which uses Standard Mode.

Real Time Clock Replacement Considerations

Direct substitutes include other ISL12029 variants with adjusted reset thresholds (e.g., ISL12029IBZ for 4.38V) if the voltage level permits. For TSSOP packages, consider ISL12029IV30AZ-T. Cross-model replacements require verifying power control mode compatibility between Legacy and Standard modes.