ISL12026IBZ

Real Time Clock Overview

The ISL12026IBZ is a micro power real-time clock (RTC) and calendar IC manufactured by Renesas Electronics Corporation. It operates within a supply voltage range of 2.7V to 5.5V, with battery backup support from 1.8V to 5.5V. The device features an I2C interface supporting data transfer rates up to 400kHz and draws a maximum current of 10µA to 20µA at the specified voltage range. Packaged in an 8-SOIC format, it tracks time in hours, minutes, and seconds, and includes calendar registers accurate through 2099 with automatic leap year correction.

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 or 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

• Systems requiring precise timekeeping with low power consumption
• Data logging applications utilizing integrated EEPROM storage
• Industrial and consumer electronics operating in -40°C to +85°C environments

Real Time Clock Procurement Notes

The ISL12026IBZ is listed as obsolete or end-of-life by major distributors such as DigiKey and Mouser. Verification of availability should focus on remaining stock from authorized channels or alternative sources, as new production may be discontinued. Check specific distributor status for current inventory levels before procurement planning.

Real Time Clock Selection Notes

Select the ISL12026IBZ when an I2C-compatible RTC with integrated non-volatile memory is required. Ensure the design supports the 8-SOIC package dimensions. Verify that the system voltage aligns with the 2.7V to 5.5V operating range. Consider the ISL12026AIVZ if TSSOP packaging is preferred, noting potential differences in power control settings between the legacy and standard modes.

Real Time Clock Part Context

This component belongs to the ISL12026 family of real-time clocks, which also includes variants like the ISL12026IVZ (TSSOP package) and the ISL12026A series. The 'B' suffix in ISL12026IBZ specifically denotes the SOIC-8 package option. The device integrates timing, calendar, and EEPROM functions into a single micro-power solution.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided documentation. Designers may consider the ISL12026AIVZ for package variation or other ISL12026 family members, but functional equivalence regarding power control settings (Legacy vs. Standard Mode) must be verified against the specific datasheet revision.