ISL12027IV27AZ

Real Time Clock Overview

The ISL12027IV27AZ is a Real-Time Clock (RTC) and calendar integrated circuit manufactured by Renesas Electronics under the Intersil brand. It features an I2C bus interface for communication and includes 512 bytes of EEPROM storage. The device supports a date format of YY-MM-DD-dd and a time format of HH:MM:SS in 24-hour mode. It operates within a supply voltage range of 2.7 V to 5.5 V and functions at temperatures between -40°C and +85°C. The component is housed in an 8-pin TSSOP package with a width of 4.4 mm.

Real Time Clock Feature Summary

• Integrated I2C serial interface for clock and data access
• Built-in 512-byte EEPROM for non-volatile data storage
• Hardware backup switching capability for continuous operation during power loss
• Supports alarm, interrupt, and timer functions alongside standard clock/calendar operations

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Data logging equipment needing timestamping capabilities
• Embedded systems utilizing I2C communication protocols

Real Time Clock Procurement Notes

This component is classified as End-of-Life (EOL) by the manufacturer. Public documentation indicates restricted availability or discontinuation status. Verification of current stock levels and alternative sourcing channels is required before procurement planning. Check official distributor listings for remaining inventory or authorized replacement parts.

Real Time Clock Selection Notes

Select this part only if I2C compatibility and integrated EEPROM are required. Ensure the design accommodates the 2.7V to 5.5V operating voltage range. Verify that the TSSOP-8 package dimensions fit the PCB layout constraints. Consider the EOL status when designing for long-term production runs.

Real Time Clock Part Context

The ISL12027 series belongs to Renesas' portfolio of real-time clock ICs. This specific model variant utilizes the IV27AZ suffix code, denoting the TSSOP-8 package and commercial temperature grade. It shares functional similarities with other members like the ISL12027IB27Z but differs in physical packaging.

Real Time Clock Replacement Considerations

Public records list the BU9873FVT-GE2 from Rohm Semiconductor as a similar replacement option. Verify pinout compatibility and electrical specifications against the original datasheet before substitution.