ISL12029IBAZ

Real Time Clock Overview

The ISL12029IBAZ is a low-power Real Time Clock/Calendar IC manufactured by Renesas Electronics Corporation. It features an I²C interface, integrated 512x8-bit EEPROM, and intelligent battery backup switching. The device operates with a main supply voltage of 2.7V to 5.5V and a backup supply of 1.8V to 5.5V. Key electrical parameters include a maximum timekeeping current of 20µA at 5.5V and a battery supply current of 1.2µA max at 3.0V. It utilizes an external 32.768kHz crystal and provides a VRESET threshold of 4.64V.

Real Time Clock Feature Summary

• Integrated 512x8-bit EEPROM with BlockLock protection and >2,000,000 cycle endurance.
• Intelligent battery backup switching with power-fail detection and 800nA typical battery supply current.
• On-chip oscillator compensation with 64-position digital trim capacitors for ±30ppm accuracy.
• CPU Supervisor functions including Power-On Reset (4.64V threshold) and Watchdog Timer.

Real Time Clock Applications

• Utility Meters
• HVAC Equipment
• Network Routers, Hubs, Switches, Bridges

Real Time Clock Procurement Notes

Verify the specific ordering suffix 'IBAZ' against the manufacturer's official datasheet FN6206.10 to confirm the 14-lead SOIC package and 4.64V reset threshold. Ensure compatibility with legacy mode settings required when VBAT exceeds VDD. Confirm RoHS compliance status through authorized distributors.

Real Time Clock Selection Notes

Select this component for applications requiring non-volatile alarm storage and CPU supervision alongside timekeeping. The ISL12029 uses Legacy Mode settings; ensure system design accommodates VDD < VBAT conditions if utilizing the battery switch. Compare against ISL12029A variants if Standard Mode operation or lower VBAT trip points are required.

Real Time Clock Part Context

This part belongs to the ISL12029 family of real-time clocks. It is distinct from the ISL12029A variant, which utilizes Standard Mode settings and different power control configurations. The 'IBAZ' designation specifically indicates the 14-lead SOIC package with a 4.64V reset threshold.

Real Time Clock Replacement Considerations

ISL12029IBZ: Identical functionality but with a 4.38V reset threshold. ISL12029IB30AZ: Identical package but with a 3.09V reset threshold. Verify that the system logic levels and reset requirements align with the alternative part's specific VRESET value.