ISL12032IVZ

Real Time Clock Overview

The ISL12032IVZ is a low power real time clock (RTC) featuring a 50/60 Hz AC input for primary timing synchronization and an external 32.768kHz crystal for backup. It includes clock/calendar registers, intelligent battery backup switching, brownout indicators, and up to four event detections with timestamps. The device provides 128 bytes of battery-backed user SRAM and operates on a VDD supply range of 2.7V to 5.5V. It utilizes an I2C interface with a data transfer rate of 400kHz and functions within a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Primary timing via 50/60 Hz AC input with redundant 32.768kHz crystal backup
• Automatic switchover between VDD and VBAT with battery voltage monitoring
• Integrated trickle charger for supercapacitor support
• Dual alarms with hardware interrupt output and event detection with timestamping

Real Time Clock Applications

• Utility meters
• Control applications
• Security related applications
• Vending machines
• White goods

Real Time Clock Procurement Notes

Verify the package type is 14-lead TSSOP and confirm the operating temperature range covers -40°C to +85°C. Ensure the component meets RoHS compliance standards as specified for this part number. Check that the ordering suffix matches the required tape and reel configuration if applicable.

Real Time Clock Selection Notes

Select this RTC when AC line synchronization is required alongside reliable battery backup. The device supports both lithium batteries and supercapacitors via its integrated trickle charger. Ensure the system design accommodates the 128-byte SRAM and I2C bus requirements for register access.

Real Time Clock Part Context

The ISL12032IVZ belongs to the ISL12032 family of real-time clocks manufactured by Renesas Electronics Corporation (formerly Intersil). It is designed for applications requiring precise timekeeping synchronized with AC mains frequency. The 'IVZ' suffix denotes the specific package and temperature grade variant.

Real Time Clock Replacement Considerations

The datasheet explicitly states: NO RECOMMENDED REPLACEMENT. Contact Technical Support Center for alternatives.