ISL12057IUZ-T

Real Time Clock Overview

The ISL12057IUZ-T is a low-power, serial real-time clock/calendar manufactured by Renesas Electronics. It operates within a supply voltage range of 1.8 V to 3.6 V and features an I2C bus interface with a data transfer rate up to 400 kHz. The device tracks time in hours, minutes, and seconds and includes calendar registers for date, month, year, and day of the week, providing automatic leap year correction through 2099. It utilizes an external 32.768 kHz crystal with 6 pF load capacitance. The component is housed in an 8-lead MSOP package and supports an operating temperature range from -40°C to +85°C.

Real Time Clock Feature Summary

• Pin compatible and functionally equivalent to Maxim DS1337
• Dual interrupt pins for frequency output and alarm events
• Four selectable frequency outputs available
• Two alarms settable to second, minute, hour, day of week, or date

Real Time Clock Applications

• Utility Meters
• HVAC Equipment
• Network Routers, Hubs, Switches, Bridges
• Point Of Sale Equipment
• Home Appliances

Real Time Clock Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging when ordering. Confirm RoHS compliance status via official datasheets prior to procurement. Ensure the I2C address configuration matches system requirements. Check for moisture sensitivity handling instructions if storage conditions exceed specified limits. Validate that the 1.8V to 3.6V supply range aligns with target circuit design.

Real Time Clock Selection Notes

Select this component for applications requiring pin compatibility with Maxim DS1337. Choose the MSOP-8 package for space-constrained surface mount designs. Ensure the system provides a stable 32.768 kHz crystal with appropriate load capacitance. Verify that the I2C interface speed meets communication timing requirements. Consider the -40°C to +85°C industrial temperature range for environmental suitability.

Real Time Clock Part Context

The ISL12057 belongs to the ISL12057 series of real-time clocks. It serves as a low-cost alternative to other serial RTCs. The device integrates clock/calendar functionality with alarm capabilities. It is designed for battery-backed applications where power consumption is critical. The MSOP-8 package offers a compact footprint for modern electronics.

Real Time Clock Replacement Considerations

The ISL12057 is functionally equivalent to the Maxim DS1337. Designers may consider direct replacements if pin compatibility is required. Verify register mapping and electrical specifications before substitution. Other family members like ISL12057IBZ offer different packaging options.