Real Time Clock/Calendar with I2C Bus? and EEPROM The ISL12028IVAZ is a real-time clock (RTC) module manufactured by INTERSIL (now part of Renesas Electronics). Below are its key specifications, descriptions, and features based on factual information:

### **Specifications:**
- **Manufacturer:** INTERSIL (Renesas Electronics)
- **Part Number:** ISL12028IVAZ
- **Type:** Real-Time Clock (RTC) with Battery Backup
- **Interface:** I²C (2-wire serial)
- **Operating Voltage:** 2.7V to 5.5V (main supply)
- **Backup Supply Voltage:** 1.8V to 5.5V (battery or supercapacitor)
- **Timekeeping Accuracy:** ±5ppm (with crystal calibration)
- **Clock Frequency:** 32.768kHz (external crystal required)
- **Temperature Range:** -40°C to +85°C (industrial)
- **Package:** 8-lead TSSOP
- **Memory:** 112 bytes of battery-backed SRAM

### **Descriptions:**
- The ISL12028IVAZ is a low-power RTC with an integrated oscillator and battery backup support.
- It provides accurate timekeeping with automatic leap year compensation.
- Features include alarm functions, timestamp logging, and power-fail detection.
- Designed for applications requiring reliable timekeeping during power loss.

### **Features:**
- **Battery Backup:** Maintains timekeeping during power loss.
- **I²C Interface:** Supports standard (100kHz) and fast (400kHz) modes.
- **Alarm Function:** Programmable alarms with interrupt output.
- **Timestamp Logging:** Records power-up/down events.
- **Low Power Consumption:** Optimized for battery operation.
- **Automatic Leap Year Compensation:** Up to the year 2099.
- **Industrial Temperature Range:** Suitable for harsh environments.

This information is based solely on the manufacturer's datasheet and technical documentation.