Real Time Clocks
      
      Real Time Clocks (RTCs) provide time and/or date information in almost any electronic device which needs to keep accurate time. The clock types are binary counter, clock/calendar/supervisor, elapsed time counter, phantom time chip, portable system controller, temperature recorder, time event recorder, and timer clock peripheral.  They contain memory sizes ranging from 2 B to 2 MB and have interface options of I2C, Parallel, Serial, SPI, 1-Wire, 2-Wire, 3-Wire, and 4-Wire.
    
| Part Number | Manufacturer | Description | Quantity | Price | Option | 
|---|---|---|---|---|---|
          
             
            M41T56M6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | 3971 | $0.00 | |
          
             
            ISL1208IB8Z-TK
          
         | 
        Renesas Electronics America Inc. | IC RTC CLK/CALENDAR I2C 8-SOIC | 4619 | $0.00 | |
          
             
            MCP79520-I/MS
          
         | 
        Microchip Technology | IC RTC CLK/CALENDAR SPI 10-MSOP | 1327 | $1.24 | |
          
             
            M41T00SM6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | 9210 | $0.00 | |
          
             
            M41T00M6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | 13087 | $0.00 | |
          
             
            M41T81M6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | 5422 | $0.00 | |
          
             
            M41T81SM6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | 21824 | $0.00 | |
          
             
            M41T82RM6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | 4129 | $0.00 | |
          
             
            M41T82ZM6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | 3466 | $0.00 | |
          
             
            MCP79412-I/SN
          
         | 
        Microchip Technology | IC RTC CLK/CALENDAR I2C 8-SOIC | 2886 | $1.01 | 
            M41T56M6F
          
            ISL1208IB8Z-TK
          
            MCP79520-I/MS
          
            MCP79412-I/SN