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X1227S8I from XICOR

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X1227S8I

Manufacturer: XICOR, INTERSIL

2-Wire? RTC Real TimeClock/Calendar/ CPU Supervisor with EEPROM

Partnumber Manufacturer Quantity Availability
X1227S8I XICOR, INTERSIL 2283 In Stock

Description and Introduction

2-Wire? RTC Real TimeClock/Calendar/ CPU Supervisor with EEPROM The part X1227S8I is manufactured by XICOR. Below are the specifications, descriptions, and features based on Ic-phoenix technical data files:

### **Specifications:**  
- **Part Number:** X1227S8I  
- **Manufacturer:** XICOR  
- **Type:** Real-Time Clock (RTC) with Non-Volatile Memory  
- **Interface:** I²C (2-wire serial interface)  
- **Supply Voltage:** 2.7V to 5.5V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Memory:** 512 bytes of EEPROM  
- **Clock Accuracy:** ±2 minutes per month at 25°C  
- **Battery Backup Support:** Yes (for timekeeping during power loss)  

### **Descriptions:**  
The X1227S8I is a real-time clock (RTC) with integrated non-volatile memory, designed for timekeeping and data storage in low-power applications. It includes a built-in crystal compensation network for improved accuracy and supports battery backup to maintain timekeeping during power interruptions.  

### **Features:**  
- **Real-Time Clock (RTC):**  
  - Tracks seconds, minutes, hours, day, date, month, and year  
  - Leap year compensation  
  - 12-hour or 24-hour time format  
- **Non-Volatile Memory:**  
  - 512 bytes of EEPROM for data storage  
  - 100,000 write cycles endurance  
  - Data retention: 100 years  
- **Low Power Consumption:**  
  - Active mode: < 400µA  
  - Standby mode: < 1µA (with battery backup)  
- **Battery Backup Operation:**  
  - Automatic switch to backup power when main power fails  
- **Additional Functions:**  
  - Two time-of-day alarms  
  - Programmable square wave output  
  - Power-fail timestamp  

This information is strictly based on the available specifications for the X1227S8I from XICOR.

Application Scenarios & Design Considerations

2-Wire? RTC Real TimeClock/Calendar/ CPU Supervisor with EEPROM

Alternative Part Number

  • DS1307Z --: I2C real-time clock in an 8-pin SOIC package, functionally similar to the X1227 and widely available from a different vendor.
  • PCF8563T --: Low-power I2C real-time clock/calendar in SO-8, a common drop-in style alternative with comparable interface and supply range.
  • M41T81M6F --: Serial I2C real-time clock with similar pinout and function in SO-8, suitable as a second-source replacement.
  • DS1307Z+ --: I2C real-time clock in an 8-pin SOIC package, functionally similar to the X1227 and widely available as a drop-in style replacement.

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