ISL12026IVZ

Real Time Clock Overview

The ISL12026IVZ is a micro power real-time clock (RTC) and calendar IC manufactured by Renesas Electronics Corporation. It features an I2C bus interface with a maximum data transfer rate of 400kHz. The device operates within a supply voltage range of 2.7V to 5.5V, consuming a maximum current of 10µA to 20µA at these voltages. It includes integrated 512x8-bit EEPROM and supports battery backup switching. The component is housed in an 8-TSSOP package with dimensions of 0.173 inches (4.40mm) width. It functions within a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated 512x8-bit EEPROM with 16-byte page write mode and BlockLock protection
• Automatic leap year correction accurate through 2099
• Intelligent battery backup switching between main supply and backup source
• Two programmable alarms with periodic interrupt capabilities

Real Time Clock Applications

• Data logging systems requiring persistent timekeeping
• Industrial control equipment operating in wide temperature ranges
• Consumer electronics with I2C connectivity requirements

Real Time Clock Procurement Notes

The ISL12026IVZ is classified as End-of-Life (EOL). Public documentation indicates a Product Discontinuation Notification dated December 16, 2025. Verification of final availability dates and specific obsolescence timelines should be conducted directly with the manufacturer or authorized distributors before procurement planning.

Real Time Clock Selection Notes

Designers must account for the EOL status when selecting this component. The ISL12026A variant utilizes Standard Mode Power Control Settings, whereas the ISL12026 uses Legacy Mode Settings; functional differences exist regarding power control operations. Ensure compatibility with existing I2C bus protocols and verify that the 8-TSSOP package fits the target PCB footprint constraints.

Real Time Clock Part Context

This part belongs to the ISL12026 family of real-time clocks. Variants such as ISL12026AIVZ offer similar functionality but may differ in power control settings. Other package options include the 8-lead SOIC format (e.g., ISL12026IBZ). The IVZ suffix specifically denotes the TSSOP package configuration.

Real Time Clock Replacement Considerations

Public sources list the ISL12026AIVZ as a related model within the same series. However, datasheets indicate differences in power control settings between the ISL12026 and ISL12026A variants. Direct substitution requires verification of register compatibility and power management behavior.