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DS1644L-120. from DALLAS,MAXIM - Dallas Semiconductor

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15.625ms

DS1644L-120.

Manufacturer: DALLAS

Nonvolatile Timekeeping RAM 

Partnumber Manufacturer Quantity Availability
DS1644L-120.,DS1644L120 DALLAS 43 In Stock

Description and Introduction

Nonvolatile Timekeeping RAM  The DS1644L-120 is a nonvolatile timekeeping RAM manufactured by Dallas Semiconductor (now part of Maxim Integrated). Here are its key specifications:

- **Memory**: 32KB (32,768 x 8) NV SRAM  
- **Timekeeping**: Integrated real-time clock (RTC) with century byte  
- **Battery Backup**: Built-in lithium energy source  
- **Operating Voltage**: 4.5V to 5.5V  
- **Access Time**: 120ns  
- **Package**: 28-pin DIP  
- **Temperature Range**: Commercial (0°C to +70°C)  
- **Data Retention**: Minimum 10 years without power  
- **Clock Accuracy**: ±2 minutes per month at 25°C  

The device combines SRAM with an RTC and nonvolatile storage, ensuring data retention during power loss.

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