Low Power RTC with Battery Backed SRAM The ISL1208IU8 is a real-time clock (RTC) device manufactured by **INTERSIL** (now part of Renesas Electronics). Below are its specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Manufacturer:** INTERSIL (now Renesas Electronics)
- **Part Number:** ISL1208IU8
- **Package:** 8-Lead MSOP (Micro Small Outline Package)
- **Interface:** I²C (Two-Wire Serial Interface)
- **Supply Voltage:** 2.7V to 5.5V
- **Operating Temperature Range:** -40°C to +85°C
- **Timekeeping Accuracy:** ±5ppm (with crystal compensation)
- **Clock Frequency:** 32.768kHz (standard crystal)
- **Battery Backup Voltage:** 1.8V to 5.5V (supports coin cell or supercapacitor)
- **EEPROM:** 128 bytes of non-volatile memory
### **Descriptions:**
The ISL1208IU8 is a low-power RTC with an integrated oscillator, I²C interface, and battery backup support. It provides accurate timekeeping and calendar functions, including seconds, minutes, hours, day, date, month, and year (with leap-year compensation). The device includes an automatic power-fail detection circuit for seamless switching between main power and backup power.
### **Features:**
- **Real-Time Clock (RTC):** Tracks time in 12-hour or 24-hour format.
- **Battery Backup:** Operates from a backup supply when main power is lost.
- **Low Power Consumption:** Optimized for battery-powered applications.
- **Alarm Function:** Programmable alarm with interrupt output.
- **128-Byte EEPROM:** For storing user data.
- **Automatic Leap Year Compensation:** Up to the year 2099.
- **Power-Fail Detection:** Monitors VDD and switches to backup mode.
- **I²C Interface:** Supports standard (100kHz) and fast (400kHz) modes.
- **Industrial Temperature Range:** -40°C to +85°C.
This information is based on the manufacturer's datasheet and technical documentation.
