ISL12059IBZ-T

Real Time Clock Overview

The ISL12059IBZ-T is a low-cost, low-power I²C Bus Real Time Clock/Calendar manufactured by Renesas Electronics (formerly Intersil). It operates within a supply voltage range of 1.8 V to 3.6 V and supports an industrial temperature range from -40°C to +85°C. The device provides timekeeping functions including seconds, minutes, hours, day, date, month, and year with leap-year compensation up to 2100. It utilizes a standard I²C interface for communication and is housed in an 8-lead SOIC package.

Real Time Clock Feature Summary

• I²C Bus Interface for serial data transfer
• Real-Time Clock/Calendar with leap-year compensation
• Low Power Operation: 1.8V to 3.6V supply range
• Industrial Temperature Range: -40°C to +85°C
• SOIC-8 Package

Real Time Clock Applications

• Utility Meters
• HVAC Equipment
• Audio/Video Components
• Set-Top Box/Television
• Network Routers, Hubs, Switches, Bridges

Real Time Clock Procurement Notes

Verify the manufacturer origin, as the part was originally an Intersil product now under Renesas Electronics. Confirm the suffix 'T' indicates tape-and-reel packaging if required for automated assembly. Ensure the specific lot date code meets project requirements, as this component may be subject to end-of-life notices given its age. Cross-reference pinouts with official datasheets to ensure compatibility with existing PCB layouts.

Real Time Clock Selection Notes

Select the ISL12059IBZ-T when a cost-effective RTC solution with I²C interface is needed for consumer or industrial electronics. It serves as a direct alternative to parts like the M41T00S and DS1340. Consider the SOIC-8 package size constraints and the -40°C to +85°C operating temperature range. Verify that the system power supply remains stable between 1.8V and 3.6V during operation.

Real Time Clock Part Context

This component belongs to the ISL1205x series of real-time clocks from Intersil/Renesas. It is functionally similar to the ISL12057 and ISL12058 but lacks certain advanced features found in higher-end models, such as backup switching or additional alarm capabilities, positioning it as a basic timekeeping solution.

Real Time Clock Replacement Considerations

Publicly confirmed substitutes include the M41T00S, DS1340, and ISL12008. Verify pin compatibility and register mapping before substitution. The ISL12058IBZ-T is a close variant but includes timer functions; ensure these do not interfere with system design.