ISL12028IVZ

Real Time Clock Overview

The ISL12028IVZ is a Real-Time Clock (RTC) manufactured by Renesas Electronics, formerly Intersil. It features an I2C bus interface and provides date and time information in YY-MM-DD-dd and HH:MM:SS (24 hr) formats. The device includes 512 bytes of EEPROM for data storage and incorporates battery backup switching to maintain operation during power transitions. It operates within a supply voltage range of 2.7 V to 5.5 V and supports functions including alarms, calendar tracking, interrupts, and timers. The component is housed in a TSSOP-14 package and is rated for industrial temperatures from -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated 512-byte EEPROM for non-volatile data storage alongside RTC functionality
• Hardware battery backup switching mechanism ensures continuous timekeeping during power loss
• I2C serial interface for communication with host processors
• Supports alarm, interrupt, and timer functions within the real-time clock architecture

Real Time Clock Applications

• Industrial control systems requiring precise time stamping
• Data logging equipment needing persistent calendar and clock data
• Embedded devices utilizing I2C communication protocols

Real Time Clock Procurement Notes

The ISL12028IVZ is listed as End-of-Life (EOL) by the manufacturer. Availability is restricted to existing stock or third-party distributors. Verification of authenticity and lot traceability is critical when sourcing this discontinued component. Buyers should confirm the specific manufacturing date code and ensure compliance with RoHS standards as indicated in official documentation before procurement.

Real Time Clock Selection Notes

Select the ISL12028IVZ when a design requires both real-time clock capabilities and significant onboard EEPROM storage (512 bytes). The inclusion of hardware battery backup switching distinguishes it from simpler RTCs that rely solely on capacitor hold-up. Ensure the system voltage aligns with the 2.7V to 5.5V operating range and that the TSSOP-14 package fits the PCB layout constraints.

Real Time Clock Part Context

This component belongs to the ISL12028 series of real-time clocks. It shares functional similarities with other Intersil/Renesas RTCs like the ISL12027 and ISL12032 but is distinguished by its specific memory capacity and package type. The 'IVZ' suffix typically denotes the industrial temperature range and lead-free TSSOP-14 packaging configuration.

Real Time Clock Replacement Considerations

As the part is End-of-Life, direct replacements must be verified against pinout and register compatibility. Potential alternatives within the Renesas portfolio include the ISL12027 or ISL12032 series, though these may differ in memory size or package style. Cross-referencing datasheets for electrical parameters and interface timing is required.