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DS1556-70 from MAXIM,MAXIM - Dallas Semiconductor

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DS1556-70

Manufacturer: MAXIM

1M, Nonvolatile, Y2K-Compliant Timekeeping RAM

Partnumber Manufacturer Quantity Availability
DS1556-70,DS155670 MAXIM 2 In Stock

Description and Introduction

1M, Nonvolatile, Y2K-Compliant Timekeeping RAM The DS1556-70 is a real-time clock (RTC) module manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications:

1. **Functionality**:  
   - Provides real-time clock/calendar functionality with battery backup.  
   - Includes a built-in 32.768 kHz crystal oscillator.  

2. **Timekeeping Features**:  
   - Tracks seconds, minutes, hours, day, date, month, and year (with leap-year compensation).  
   - Operates in either 12-hour or 24-hour format.  

3. **Memory**:  
   - Includes 114 bytes of general-purpose NV SRAM.  

4. **Power Supply**:  
   - Primary voltage: **3.3V** or **5V** operation.  
   - Battery backup support (typically **3V lithium battery**).  

5. **Interface**:  
   - Parallel interface for communication with a microcontroller or host system.  

6. **Accuracy**:  
   - Timekeeping accuracy depends on the crystal but is typically **±2 minutes per month at 25°C**.  

7. **Temperature Range**:  
   - Operating: **-40°C to +85°C**.  

8. **Package**:  
   - 34-pin PowerCap module (surface-mountable).  

For exact electrical characteristics and timing diagrams, refer to the official datasheet from Maxim Integrated (Analog Devices).

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