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 | 
|---|---|---|---|---|---|
          
             
            MCP79411-I/SN
          
         | 
        Microchip Technology | IC RTC CLK/CALENDAR I2C 8-SOIC | 25264 | $1.01 | |
| 
          
             | 
        Microchip Technology | IC RTC CLK/CALENDAR I2C 8-TSSOP | 4574 | $0.97 | |
          
             
            MCP79410-I/SN
          
         | 
        Microchip Technology | IC RTC CLK/CALENDAR I2C 8-SOIC | 1054 | $0.93 | |
          
             
            M41T0M6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | 11625 | $0.00 | |
          
             
            M41T62Q6F
          
         | 
        STMicroelectronics | IC RTC CLK/CALENDAR I2C 16-QFN | 14920 | $0.00 | |
          
             
            MCP79410T-I/MS
          
         | 
        Microchip Technology | IC RTC CLK/CALENDAR I2C 8-MSOP | 3144 | $0.00 | |
          
             
            AB1815-T3
          
         | 
        Abracon LLC. | IC RTC CLK/CALENDAR SPI 16-QFN | 5774 | $0.00 | |
          
             
            MCP7940N-I/MS
          
         | 
        Microchip Technology | IC RTC CLK/CALENDAR I2C 8-MSOP | 2733 | $0.80 | |
          
             
            AB0805-T3
          
         | 
        Abracon LLC. | IC RTC CLK/CALENDAR I2C 16-QFN | 21152 | $1.73 | |
          
             
            AB0815-T3
          
         | 
        Abracon LLC. | IC RTC CLK/CALENDAR SPI 16-QFN | 72950 | $0.00 | 
            MCP79411-I/SN
          
            M41T0M6F
          
            M41T62Q6F
          
            MCP79410T-I/MS
          
            AB1815-T3