ISL12023IVZ-T

Real Time Clock Overview

The ISL12023IVZ-T is a low power real time clock with battery-backed SRAM and embedded temperature compensation. It features an on-chip oscillator that achieves ±5ppm stability over the -40°C to +85°C range using an external 32.768kHz crystal. The device includes a 10-bit digital temperature sensor with ±2°C accuracy, automatic daylight saving time adjustment, and a brownout indicator. It provides 128 bytes of battery-backed user SRAM and operates with a VDD supply of 2.7V to 5.5V and a VBAT backup supply down to 1.8V.

Real Time Clock Feature Summary

• Embedded temperature compensation for ±5ppm frequency stability from -40°C to +85°C
• 128 bytes of battery-backed user SRAM accessible via I2C interface
• Automatic backup switching between VDD and VBAT with timestamp recording
• Programmable alarm with single event or pulse interrupt modes

Real Time Clock Applications

• Utility Meters
• POS Equipment
• Medical Devices
• Security Systems
• White Goods

Real Time Clock Procurement Notes

Verify the -T suffix indicates tape and reel packaging as specified in the ordering information. Confirm the IVZ designation corresponds to the industrial temperature range (-40°C to +85°C) and 14 Ld TSSOP package. Ensure RoHS compliance requirements are met for the specific manufacturing batch.

Real Time Clock Selection Notes

Select this component when precise timekeeping within ±5ppm is required across wide temperature variations without external compensation crystals. The integrated temperature sensor simplifies design by eliminating separate thermal monitoring components. Ensure the application supports the 400kHz I2C bus speed and open-drain output configurations for SDA, IRQ, and FOUT pins.

Real Time Clock Part Context

The ISL12023 is part of Renesas Electronics' (formerly Intersil) low power RTC family. The IVZ variant specifies the industrial temperature grade and plastic TSSOP packaging. The -T suffix denotes the specific reel packaging format for automated assembly processes, distinguishing it from the tube-packaged ISL12023IVZ.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.