ISL12022MIBZ-T

Real Time Clock Overview

The ISL12022MIBZ-T is a low-power Real-Time Clock (RTC) IC from the Renesas ISL12022 series, manufactured by Renesas Electronics Corporation. It integrates a calendar, timekeeping functions, and 128 bytes of battery-backed SRAM. The device operates on an I2C serial interface and supports supply voltages ranging from 2.7V to 5.5V for Vcc and 1.8V to 5.5V for battery backup. Key features include embedded temperature-compensated crystal trimming with ±5ppm accuracy, automatic Daylight Saving Time adjustment, leap year compensation, and alarm capabilities. It is housed in a 20-SOIC package and operates within a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated 128-bit battery-backed SRAM for data retention
• Embedded temperature-compensated crystal oscillator with ±5ppm accuracy
• Automatic Daylight Saving Time and leap year compensation
• I2C serial interface with standard and fast mode support

Real Time Clock Applications

• Industrial weighing scales
• Utility meters
• POS equipment
• Medical devices
• Security systems

Real Time Clock Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer designation as Renesas Electronics Corporation, formerly Intersil. Ensure compatibility with the 20-SOIC footprint during PCB layout. Check for RoHS compliance status in the latest datasheet revision before finalizing procurement specifications.

Real Time Clock Selection Notes

Select this component for applications requiring high timing accuracy without external crystals due to the embedded temp-compensation feature. The 128-byte SRAM is suitable for logging historical data or storing configuration parameters. Verify that the system voltage aligns with the 2.7V–5.5V operating range. Consider the 20-SOIC package size constraints relative to available board space.

Real Time Clock Part Context

The ISL12022MIBZ-T belongs to the ISL12022 family of low-power RTCs. This series is designed for precision timekeeping in portable and industrial environments. The 'MIBZ' designation typically refers to the specific package type and temperature grade, while '-T' denotes the reel packaging format for automated assembly.

Real Time Clock Replacement Considerations

Direct pin-to-pin replacements should be verified against the official Renesas cross-reference guide. Alternative parts must match the I2C interface, voltage ranges, and package dimensions. Evaluate if other ISL12022 variants offer different memory sizes or package options that better fit the design requirements.