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X1227 from XICOR

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X1227

Manufacturer: XICOR, XICRO

Real Time Clock/Calendar/CPU Supervisor with EEPROM

Partnumber Manufacturer Quantity Availability
X1227 XICOR, XICRO 7200 In Stock

Description and Introduction

Real Time Clock/Calendar/CPU Supervisor with EEPROM Here are the factual details about part X1227 from manufacturer XICOR:

### **X1227 Specifications:**
1. **Type**: Nonvolatile Static RAM (nvSRAM) with Real-Time Clock (RTC).
2. **Memory Size**: 16 Kb (2K x 8).
3. **Interface**: Serial (I²C).
4. **Supply Voltage**: 2.7V to 5.5V.
5. **Operating Temperature Range**: -40°C to +85°C.
6. **Data Retention**: Minimum 100 years.
7. **Clock Accuracy**: ±5 ppm (at 25°C).
8. **Endurance**: Unlimited read/write cycles (SRAM), 100,000 write cycles (EEPROM).
9. **Package Options**: 8-lead SOIC, 8-lead TSSOP.

### **Descriptions:**
- The X1227 integrates SRAM, EEPROM, and an RTC in a single chip.
- It provides nonvolatile storage with automatic power-fail data protection.
- The RTC includes alarm functionality and a programmable watchdog timer.
- Designed for applications requiring timekeeping and data retention.

### **Features:**
- **Automatic Battery Backup**: Switches to backup supply during power loss.
- **I²C Serial Interface**: Supports standard (100 kHz) and fast (400 kHz) modes.
- **Timekeeping Functions**: Seconds, minutes, hours, day, date, month, year, leap year compensation.
- **Alarm and Timer**: Programmable alarms and watchdog timer.
- **Low Power Consumption**: Active and standby modes for power efficiency.

Let me know if you need further details.

Application Scenarios & Design Considerations

Real Time Clock/Calendar/CPU Supervisor with EEPROM

Alternative Part Number

  • DS1307 --: Widely available I2C real-time clock in an 8-pin package, functionally similar to the X1227 RTC and easy to source as a drop-in replacement in many designs.
  • PCF8563 --: Low-power I2C real-time clock/calendar with similar register-level functionality, commonly used as an alternative when the X1227 is unavailable.
  • M41T00 --: I2C serial real-time clock with comparable features and pinout, suitable as a second-source alternative for X1227-based designs.

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