ISL12026IBZ-T7A

Real Time Clock Overview

The ISL12026IBZ-T7A is a micro power real-time clock (RTC) and calendar IC manufactured by Renesas Electronics. It features an I2C bus interface, operating within a supply voltage range of 2.7V to 5.5V and a battery backup range of 1.8V to 5.5V. The device tracks time in hours, minutes, and seconds with automatic leap year correction through 2099. It integrates 512x8 bits of EEPROM and supports two non-volatile alarms. The maximum current consumption during timing is 10µA to 20µA at 2.7V to 5.5V. It is housed in an 8-SOIC package and operates between -40°C and +85°C.

Real Time Clock Feature Summary

• Integrated 512x8-bit EEPROM with 16-byte page write mode and BlockLock protection
• Automatic backup switching between main supply and battery/supercapacitor
• On-chip oscillator compensation with 64-position digital trim capacitors
• Two non-volatile alarms with repeat mode for periodic interrupts

Real Time Clock Applications

• Utility meters
• HVAC equipment
• Automatic backup systems

Real Time Clock Procurement Notes

The ISL12026IBZ-T7A is listed as obsolete or discontinued by the manufacturer. Verification of final availability from authorized distributors is required before procurement planning. Designers should consider lifecycle status when integrating this component into new products.

Real Time Clock Selection Notes

Select the ISL12026IBZ-T7A for applications requiring low-power RTC functionality with integrated non-volatile memory. Ensure compatibility with I2C interfaces and verify that the 8-SOIC package fits the PCB layout constraints. Compare against the ISL12026A series if standard mode power control settings are preferred over legacy mode.

Real Time Clock Part Context

This part belongs to the ISL12026 family of real-time clocks. Variants such as ISL12026IVZ-T use TSSOP packages, while others may differ in EEPROM size or pinout. The IBZ suffix indicates the SOIC package type, and T7A denotes the tape and reel packaging configuration.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, alternative components must be selected based on functional equivalence, including I2C interface, EEPROM capacity, and package dimensions.