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ISL1208IU8Z from INTERSIL

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ISL1208IU8Z

Manufacturer: INTERSIL, ISL

Low Power RTC with Battery Backed SRAM

Partnumber Manufacturer Quantity Availability
ISL1208IU8Z INTERSIL, ISL 54308 In Stock

Description and Introduction

Low Power RTC with Battery Backed SRAM The ISL1208IU8Z is a real-time clock (RTC) manufactured by Renesas Electronics (formerly Intersil). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Manufacturer:**  
Renesas Electronics (formerly Intersil)  

### **Part Number:**  
ISL1208IU8Z  

### **Description:**  
The ISL1208IU8Z is a low-power, I²C-interfaced real-time clock (RTC) with an integrated oscillator, battery backup, and automatic power-fail detection. It is designed for timekeeping applications in embedded systems.  

### **Key Features:**  
- **Real-Time Clock (RTC):**  
  - Tracks seconds, minutes, hours, day, date, month, and year with leap-year compensation (up to 2099).  
  - 12-hour or 24-hour time format.  

- **Low Power Consumption:**  
  - Ultra-low standby current (typically 400nA) when powered by a backup battery.  

- **Battery Backup:**  
  - Integrated automatic switchover to backup supply (battery or supercapacitor) when main power fails.  

- **I²C Interface:**  
  - Supports standard (100kHz) and fast (400kHz) I²C communication modes.  

- **Integrated Oscillator:**  
  - Includes an on-chip, factory-calibrated oscillator for accurate timekeeping.  

- **Alarm Function:**  
  - Configurable alarm with interrupt output.  

- **Power-Fail Detection:**  
  - Monitors VDD and automatically switches to backup power when needed.  

- **Operating Voltage:**  
  - Main supply (VDD): 2.7V to 5.5V  
  - Backup supply (VBAT): 1.8V to 5.5V  

- **Package:**  
  - 8-lead µSOP (Micro Small Outline Package).  

- **Temperature Range:**  
  - Industrial: -40°C to +85°C.  

### **Applications:**  
- Embedded systems  
- Smart meters  
- Medical devices  
- Consumer electronics  
- Industrial automation  

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

Application Scenarios & Design Considerations

Low Power RTC with Battery Backed SRAM

Alternative Part Number

  • DS1338Z-33+ --: I2C real-time clock with integrated crystal in an 8-pin package, functionally similar to the ISL1208 and widely available as a drop-in style alternative.
  • PCF8563T/5,518 --: Low-power I2C RTC in an 8-pin SO package offering comparable timekeeping features and a different series naming for easy distinction.
  • M41T81M6F --: Serial I2C real-time clock with similar register-based operation and 8-pin SOIC footprint, suitable as a third-source alternative.
  • DS1307Z+ --: Widely used I2C real-time clock in an 8-pin SOIC package, functionally similar to the ISL1208 for basic timekeeping applications and easy to source.
  • PCF8563T --: Low-power I2C RTC with similar serial interface and small package, suitable as a drop-in functional replacement in many designs.
  • M41T81SM6F --: I2C serial RTC with similar supply range and 8-pin SOIC footprint, suitable as a functional replacement with minor firmware adjustment.

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