ISL12025IBZ

Real Time Clock Overview

The ISL12025IBZ is a low-power real-time clock/calendar device manufactured by Renesas Electronics Corporation, formerly Intersil. It features an I2C bus interface with a 400kHz data transfer rate and integrates 512x8-bit EEPROM configured in a 16-byte page format. The device includes two non-volatile alarms, a 64-bit unique ID, on-chip oscillator compensation, and CPU supervisor functions including power-on reset and watchdog timer. It operates within a supply voltage range of 2.7V to 5.5V for VDD and 1.8V to 5.5V for battery backup (VBAT). The component is housed in an 8-lead SOIC package and supports an operating temperature range from -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated 512x8-bit EEPROM with 16-byte page write mode and BlockLock protection
• Two non-volatile alarms settable to second, minute, hour, day, month, or year
• On-chip oscillator compensation with 64-position digitally controlled trim capacitor
• CPU Supervisor functions including Power-On Reset, Low Voltage Sensing, and Watchdog Timer

Real Time Clock Applications

• Utility Meters
• Audio/Video Components
• Network Routers, Hubs, Switches, Bridges
• Cellular Infrastructure Equipment
• POS Equipment

Real Time Clock Procurement Notes

The ISL12025IBZ is classified as an obsolete product with no recommended replacement available. Verification of the specific ordering suffix IBZ confirms the 8-lead SOIC package variant. Users must contact technical support for further assistance regarding this discontinued component.

Real Time Clock Selection Notes

Select the ISL12025IBZ when an 8-lead SOIC package is required for designs needing integrated EEPROM and oscillator compensation. Ensure the design accommodates the 2.7V to 5.5V VDD range and utilizes an external 32.768kHz crystal. Verify that the host system can manage the specific I2C communication protocol and register map defined in the datasheet.

Real Time Clock Part Context

This component belongs to the ISL12025 family of real-time clocks. The IBZ suffix specifically denotes the 8-lead Small Outline Integrated Circuit (SOIC) package option. Other variants in the family include the IVZ suffix for the 8-lead TSSOP package. The device was originally marketed under the Intersil brand before corporate integration.

Real Time Clock Replacement Considerations

The manufacturer has designated this part as obsolete with no recommended replacement. No public substitute part numbers are confirmed for direct pin-to-pin or functional equivalence.