Real Time Clocks
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We offer Real Time Clock (RTC) functions including Alarm RTC, Binary Counter, Real Time Calendar Clock (RTCC), Elapsed Time Recorder and Real Time Event Recorder.
Use of a hardware RTC allows microcontrollers like the Raspberry Pi to be used without internet access and still provide services that use time stamps. For example, the DS1307 is a commonly available I2C based RTC module – so using the DS1307’s I2C protocol, which is supported by the Raspberry Pi, real time clock support can easily and cost-effectively be added.
Another popular RTC module, also with I2C support, is the DS3231. The DS3231 is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when mains power to the device is interrupted. Accuracy is ±2ppm from 0°C to +40°C, and ±3.5ppm from -40°C to +85°C.
Apart from I2C, other interface types include 2 wire, 3 wire, 4 wire, Motorola Serial Peripheral Interface (SPI), Bytewide, Parallel, Multiplexed, and Phantom Clock.
Operating temperatures range from -40°C minimum to +125°C maximum. Products are available to the AEC-Q100 Automotive Qualification Standard.
| Manufacturer Part No | Newark Part No. | Description / Manufacturer | Availability | Price for: |
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Quantity | Date Format | Clock Format | Clock IC Type | Supply Voltage Min | Supply Voltage Max | Clock IC Case Style | No. of Pins | IC Interface Type | Operating Temperature Min | Operating Temperature Max | Product Range | Automotive Qualification Standard | |
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PT7C4563BQ1WEX
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29AK4207 |
REAL TIME CLOCK, -40 TO 125DEG C DIODES INC.
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YY-MM-DD-dd | HH:MM:SS | Calendar, Clock | 1.3V | 5.5V | WSOIC | 8Pins | I2C | -40°C | 125°C | - | - | |
PCF8583T/5,518
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52X6199 |
RTC, Clock/Calendar, Date Time Format (YYYY-MM-DD-dd, HH:MM:SS, Binary) I2C, 2.5V to 6V, SOIC-8 NXP
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1+ $3.73 |
Day; Date; Month; Year | HH:MM:SS:hh | Alarm RTC | 1V | 6V | SOIC | 8Pins | I2C | -40°C | 85°C | - | - |