ISL1218IBZ-T

Real Time Clock Overview

The ISL1218IBZ-T is a low-power, I2C-compatible real-time clock (RTC) with an integrated battery-backed SRAM. It provides accurate timekeeping using an external 32.768 kHz crystal oscillator and includes programmable alarm functions and square-wave output. The device operates over a wide temperature range and features non-volatile memory to retain data during power loss. Key electrical parameters include a supply voltage range of 1.8V to 5.5V and typical current consumption of 400nA in battery backup mode.

Real Time Clock Feature Summary

• I2C interface for simple system integration
• Integrated battery-backed SRAM for data retention
• Programmable alarms and square-wave output
• Wide operating voltage range (1.8V to 5.5V)

Real Time Clock Applications

• Portable electronic devices requiring precise timekeeping
• Industrial control systems needing reliable RTC functionality
• Consumer electronics with battery backup requirements

Real Time Clock Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'IBZ' suffix corresponds to the correct temperature grade and package type as per the official Renesas datasheet. Ensure compatibility with your system's I2C bus voltage levels before procurement.

Real Time Clock Selection Notes

Select this component if your design requires an I2C-connected RTC with embedded SRAM. Verify that the required operating voltage aligns with the 1.8V to 5.5V range. Consider the package availability and whether the tape-and-reel format suits your assembly process.

Real Time Clock Part Context

This part belongs to Renesas' family of real-time clocks designed for low-power applications. It complements other RTC offerings by providing additional SRAM capacity alongside standard timekeeping features, suitable for systems needing both time and small data storage.

Real Time Clock Replacement Considerations

Check for direct pin-to-pin replacements within the ISL1218 series or compatible I2C RTCs from other manufacturers. Ensure functional equivalence regarding voltage range, interface protocol, and memory size before substitution.