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X1227S8I from XICOR

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X1227S8I

Manufacturer: XICOR

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

Partnumber Manufacturer Quantity Availability
X1227S8I XICOR 2190 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.

Partnumber Manufacturer Quantity Availability
X1227S8I INTERSIL 93 In Stock

Description and Introduction

2-Wire? RTC Real TimeClock/Calendar/ CPU Supervisor with EEPROM The part X1227S8I is manufactured by **INTERSIL**.  

### **Specifications:**  
- **Type:** Real-Time Clock (RTC) with EEPROM  
- **Package:** 8-SOIC  
- **Interface:** I²C  
- **Operating Voltage:** 2.7V to 5.5V  
- **Timekeeping Accuracy:** ±2ppm (0°C to +40°C)  
- **EEPROM Size:** 256 bytes  
- **Battery Backup Support:** Yes  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The X1227 is a real-time clock with an integrated 256-byte EEPROM.  
- It provides timekeeping functions (seconds, minutes, hours, day, date, month, year) with leap-year compensation.  
- Features a built-in power-fail detection and switch circuitry for backup battery operation.  
- Includes an I²C serial interface for communication with a microcontroller.  

### **Features:**  
- **Low Power Consumption:** Optimized for battery-backed applications.  
- **Automatic Power-Fail Detection:** Switches to backup supply when primary power fails.  
- **Two Time-of-Day Alarms:** Programmable alarms with interrupt capability.  
- **Watchdog Timer:** Configurable timeout period.  
- **Programmable Square-Wave Output:** Available for timing applications.  
- **EEPROM Write Protection:** Prevents accidental writes.  

For detailed electrical characteristics and application notes, refer to the official **INTERSIL datasheet**.

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