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DS1644-120 from DS,MAXIM - Dallas Semiconductor

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DS1644-120

Manufacturer: DS

32K x 8 nonvolatile timekeeping static RAM, 120ns access

Partnumber Manufacturer Quantity Availability
DS1644-120,DS1644120 DS 300 In Stock

Description and Introduction

32K x 8 nonvolatile timekeeping static RAM, 120ns access The DS1644-120 is a Nonvolatile Timekeeping RAM (NVSRAM) manufactured by Maxim Integrated (formerly Dallas Semiconductor). Here are its key specifications:

- **Memory Size**: 64Kb (8K x 8)  
- **Integrated Features**: Real-Time Clock (RTC), NVSRAM, power-fail control  
- **Battery Backup**: Built-in lithium energy source  
- **Data Retention**: Minimum 10 years without power  
- **Clock Accuracy**: ±2 minutes per month at 25°C  
- **Operating Voltage**: 4.5V to 5.5V  
- **Operating Temperature Range**: 0°C to +70°C  
- **Interface**: Parallel (byte-wide)  
- **Package**: 32-pin DIP  

The device combines SRAM with a real-time clock and nonvolatile storage, ensuring data retention during power loss.  

For exact details, refer to the official datasheet from Maxim Integrated.

Partnumber Manufacturer Quantity Availability
DS1644-120,DS1644120 DALLAS 300 In Stock

Description and Introduction

32K x 8 nonvolatile timekeeping static RAM, 120ns access The DS1644-120 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 Function**: Real-time clock (RTC) with century byte support  
- **Battery Backup**: Integrated lithium energy source  
- **Data Retention**: Minimum 10 years without power  
- **Operating Voltage**: 4.5V to 5.5V  
- **Clock Accuracy**: ±2 minutes per month at 25°C  
- **Interface**: Parallel (8-bit)  
- **Package**: 28-pin DIP  
- **Temperature Range**: Commercial (0°C to +70°C)  
- **Additional Features**: Automatic leap-year compensation, 24/12-hour format support  

The DS1644-120 is designed for applications requiring nonvolatile memory with integrated timekeeping.

Partnumber Manufacturer Quantity Availability
DS1644-120 ,DS1644120 DALLA 264 In Stock

Description and Introduction

32K x 8 nonvolatile timekeeping static RAM, 120ns access The DS1644-120 is a Nonvolatile Timekeeping RAM manufactured by Dallas Semiconductor (now part of Maxim Integrated). Here are its key specifications:

- **Type**: Nonvolatile Timekeeping RAM  
- **Memory Size**: 64Kb (8KB)  
- **Interface**: Parallel  
- **Supply Voltage**: 4.5V to 5.5V  
- **Operating Temperature**: 0°C to +70°C  
- **Timekeeping Features**:  
  - Real-time clock (RTC) with century byte  
  - Counts seconds, minutes, hours, day, date, month, and year  
  - Leap-year compensation  
- **Battery Backup**: Integrated lithium energy source  
- **Package**: 32-pin DIP  

This device combines SRAM with a real-time clock and nonvolatile storage, ensuring data retention during power loss.

Partnumber Manufacturer Quantity Availability
DS1644-120,DS1644120 DALLS 50 In Stock

Description and Introduction

32K x 8 nonvolatile timekeeping static RAM, 120ns access The DS1644-120 is a Nonvolatile Timekeeping RAM manufactured by Dallas Semiconductor (now part of Maxim Integrated). Here are its key specifications:

- **Type**: Nonvolatile Timekeeping RAM
- **Memory Size**: 32KB (32,768 x 8)
- **Clock**: Integrated real-time clock (RTC)
- **Battery Backup**: Built-in lithium energy source
- **Data Retention**: Minimum 10 years without power
- **Operating Voltage**: 4.5V to 5.5V
- **Interface**: Parallel
- **Package**: 28-pin DIP (Dual In-line Package)
- **Temperature Range**: Commercial (0°C to +70°C) or Industrial (-40°C to +85°C) options
- **Features**: Automatic leap-year compensation, counts seconds, minutes, hours, day, date, month, and year

This device combines SRAM with a real-time clock and nonvolatile backup, ensuring data retention during power loss.

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