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.
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M48T18-100PC1
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9756558 |
RTC, Timekeeper NVSRAM, Parallel, 4.5 V to 5.5 V, DIP-28 STMICROELECTRONICS
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1+ €26.47 €31.76 5+ €25.45 €30.54 10+ €24.42 €29.30 25+ €23.32 €27.98 50+ €20.85 €25.02 |
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YY-MM-DD-dd | HH:MM:SS | Timekeeper | 4.5V | 5.5V | DIP | 28Pins | Parallel | 0°C | 70°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
M48T02-150PC1
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9756388 |
RTC, Timekeeper NVSRAM, Parallel, 4.75 V to 5.5 V, DIP-24 STMICROELECTRONICS
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1+ €23.03 €27.64 5+ €22.14 €26.57 10+ €21.24 €25.49 25+ €20.29 €24.35 50+ €18.14 €21.77 |
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YY-MM-DD-dd | HH:MM:SS | Timekeeper | 4.75V | 5.5V | DIP | 24Pins | Parallel | 0°C | 70°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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M48T35Y-70PC1
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9756574 |
RTC, TIMEKEEPER® RAM, 32Kbx8 Non-Volatile Static RAM, Parallel, 4.5V to 5.5V, DIP-28 STMICROELECTRONICS
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1+ €30.24 €36.29 5+ €29.07 €34.88 10+ €27.89 €33.47 25+ €26.64 €31.97 50+ €23.82 €28.58 |
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YY-MM-DD-dd | HH:MM:SS | Timekeeper | 4.5V | 5.5V | DIP | 28Pins | Parallel | 0°C | 70°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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M48T08-100PC1
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9756396 |
RTC, Timekeeper NVSRAM, Parallel, 4.75 V to 5.5 V, DIP-28 STMICROELECTRONICS
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1+ €24.94 €29.93 5+ €23.97 €28.76 10+ €22.99 €27.59 25+ €21.96 €26.35 50+ €19.64 €23.57 |
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YY-MM-DD-dd | HH:MM:SS | Timekeeper | 4.75V | 5.5V | DIP | 28Pins | Parallel | 0°C | 70°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
MCP7940M-I/P
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2098894 |
RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, DIP-8 MICROCHIP
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1+ €0.776 €0.93 25+ €0.775 €0.93 100+ €0.774 €0.93 |
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DD:MM:YYYY | HH:MM:SS | RTC | 1.8V | 5.5V | DIP | 8Pins | I2C | -40°C | 85°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Q418564C20005 RX-8564LC
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1278031 |
RTC IC, YYYY:MM:DD:Hr:Min:Secs, 12Hr / 24Hr, 1.8 V to 5.5 V, VSOJ, 12Pins, I2C EPSON
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1+ €2.66 €3.19 10+ €2.33 €2.80 |
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YYYY:MM:DD:Hr:Min:Secs | 12Hr / 24Hr | RTC | 1.8V | 5.5V | VSOJ | 12Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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M48T58Y-70PC1
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9755772 |
RTC, Timekeeper NVSRAM, Parallel, 4.5 V to 5.5 V, DIP-28 STMICROELECTRONICS
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1+ €24.40 €29.28 5+ €23.45 €28.14 10+ €22.50 €27.00 25+ €21.49 €25.79 50+ €19.21 €23.05 |
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YY-MM-DD-dd | HH:MM:SS | Timekeeper | 4.5V | 5.5V | DIP | 28Pins | Parallel | 0°C | 70°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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M48T18-150PC1
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1467734 |
RTC, Timekeeper NVSRAM, Parallel, 4.5 V to 5.5 V, DIP-28 STMICROELECTRONICS
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1+ €29.43 €35.32 5+ €28.29 €33.95 10+ €27.15 €32.58 25+ €25.93 €31.12 50+ €23.19 €27.83 |
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YY-MM-DD-dd | HH:MM:SS | Timekeeper | 4.5V | 5.5V | DIP | 28Pins | Parallel | 0°C | 70°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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RV-4162-C7-TA-QC-020
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2358522 |
RTC IC, Date Time Format (Day/Date/Month/Year/Century 12Hr / 24Hr), I2C, 1 V to 4.4 V, LCC-8 MICRO CRYSTAL
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1+ €5.22 €6.26 10+ €4.73 €5.68 25+ €4.47 €5.36 50+ €4.05 €4.86 100+ €3.70 €4.44 250+ €3.46 €4.15 500+ €3.31 €3.97 More Pricing... |
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Day; Date; Month; Year; Century | 12Hr / 24Hr | RTC | 1V | 4.4V | LCC | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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PCF8583T/5,518
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2400456 |
Calendar, Clock IC, Format (YYYY:MM:WK:DD:hh:mm:ss/Binary), I2C, 2.5 V to 6 V supply, SOIC-8 NXP
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Each (Supplied on Cut Tape) |
1+ €4.13 €4.96 10+ €3.69 €4.43 25+ €3.52 €4.22 50+ €3.45 €4.14 |
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YYYY:MM:WK:DD:Hr:Min:Secs | Binary | Calendar, Clock | 2.5V | 6V | SOIC | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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PCF8563TS/4,118
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2400454 |
Calendar, Clock IC, Format (YYYY:MM:WK:DD:hh:mm:ss/Binary), I2C, 1 V to 5.5 V supply, TSSOP-8 NXP
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1+ €2.12 €2.54 10+ €1.80 €2.16 50+ €1.67 €2.00 100+ €1.53 €1.84 |
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YYYY:MM:WK:DD:Hr:Min:Secs | Binary | Calendar, Clock | 1V | 5.5V | TSSOP | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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PCF8523T/1,118
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2400452 |
Calendar, Clock IC, Format (YYYY:MM:WK:DD:hh:mm:ss/Binary), I2C, 1.2 V to 5.5 V supply, SOIC-8 NXP
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1+ €1.91 €2.29 10+ €1.66 €1.99 50+ €1.57 €1.88 100+ €1.48 €1.78 |
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YYYY:MM:WK:DD:Hr:Min:Secs | Binary | Calendar, Clock | 1.2V | 5.5V | SOIC | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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PCF85063ATL/1,118
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2427481 |
Calendar, Clock IC, Year/Month/Week/Date/Hr/Min/Sec Binary, I2C, 900 mV to 5.5 V, HXSON-10 NXP
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1+ €0.874 €1.05 10+ €0.753 €0.90 100+ €0.597 €0.72 500+ €0.535 €0.64 1000+ €0.446 €0.54 2500+ €0.435 €0.52 5000+ €0.426 €0.51 More Pricing... |
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YYYY:MM:WK:DD:Hr:Min:Secs | Binary | Calendar, Clock | 900mV | 5.5V | HXSON | 10Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS3231M+
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2515405 |
Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V, WSOIC-16 ANALOG DEVICES
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1+ €9.99 €11.99 10+ €9.03 €10.84 46+ €8.61 €10.33 138+ €8.33 €10.00 276+ €8.04 €9.65 506+ €7.76 €9.31 1012+ €7.47 €8.96 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS | Alarm RTC | 2.3V | 5.5V | WSOIC | 16Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS3231MZ+
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2515358 |
Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V, NSOIC-8 ANALOG DEVICES
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1+ €9.94 €11.93 10+ €8.97 €10.76 25+ €8.55 €10.26 100+ €7.43 €8.92 300+ €7.09 €8.51 500+ €6.47 €7.76 1000+ €6.26 €7.51 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS | Alarm RTC | 2.3V | 5.5V | NSOIC | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1338Z-33+
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2518690 |
RTC IC, Date Time Format (Day/Date/Month/Year ss:mm:hh), I2C, Serial, 3 V to 5.5 V, SOIC-8 ANALOG DEVICES
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1+ €4.55 €5.46 10+ €4.09 €4.91 25+ €3.87 €4.64 100+ €3.35 €4.02 300+ €3.18 €3.82 500+ €2.85 €3.42 1000+ €2.72 €3.26 2500+ €2.58 €3.10 More Pricing... |
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Day; Date; Month; Year | ss:mm:hh | RTC | 3V | 5.5V | SOIC | 8Pins | I2C, Serial | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS3231M+TRL
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2515485 |
Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V, WSOIC-16 ANALOG DEVICES
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1+ €9.12 €10.94 10+ €8.24 €9.89 25+ €7.86 €9.43 100+ €6.82 €8.18 250+ €6.51 €7.81 500+ €5.94 €7.13 1000+ €5.59 €6.71 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS | Alarm RTC | 2.3V | 5.5V | WSOIC | 16Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1307+
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2515369 |
RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, Serial, 4.5 V to 5.5 V, DIP-8 ANALOG DEVICES
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1+ €4.95 €5.94 10+ €4.44 €5.33 50+ €4.20 €5.04 100+ €3.64 €4.37 250+ €3.45 €4.14 500+ €3.10 €3.72 1000+ €2.95 €3.54 2500+ €2.80 €3.36 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS | RTC | 4.5V | 5.5V | DIP | 8Pins | I2C, Serial | 0°C | 70°C | PW Series | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1372U+
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2515387 |
Binary Counter IC, Date Time Format (Binary), I2C, 2.4 V to 5.5 V, µSOP-8 ANALOG DEVICES
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1+ €3.70 €4.44 10+ €3.33 €4.00 50+ €3.15 €3.78 100+ €2.73 €3.28 250+ €2.59 €3.11 500+ €2.32 €2.78 2500+ €2.20 €2.64 5000+ €2.08 €2.50 More Pricing... |
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Binary | Binary | Binary Counter | 2.4V | 5.5V | µSOP | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1339U-33+T&R
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2515464 |
Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.97 V to 5.5 V, µSOP-8 ANALOG DEVICES
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1+ €4.44 €5.33 10+ €3.99 €4.79 25+ €3.76 €4.51 100+ €3.26 €3.91 250+ €3.09 €3.71 500+ €2.77 €3.32 3000+ €2.64 €3.17 6000+ €2.51 €3.01 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS | Alarm RTC | 2.97V | 5.5V | µSOP | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1307ZN+T&R
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2798724 |
RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 4.5 V to 5.5 V supply, SOIC-8 ANALOG DEVICES
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1+ €4.33 €5.20 10+ €3.90 €4.68 25+ €3.68 €4.42 100+ €3.20 €3.84 250+ €3.03 €3.64 500+ €2.72 €3.26 2500+ €2.59 €3.11 5000+ €2.46 €2.95 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS | RTC | 4.5V | 5.5V | SOIC | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1339BU+
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2515378 |
RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 1.71 V to 5.5 V, µSOP-8 ANALOG DEVICES
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1+ €4.92 €5.90 10+ €4.42 €5.30 50+ €4.18 €5.02 100+ €3.62 €4.34 250+ €3.43 €4.12 500+ €3.08 €3.70 1000+ €2.78 €3.34 2500+ €2.76 €3.31 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS | RTC | 1.71V | 5.5V | µSOP | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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PCF8563T/5,518
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2775929RL |
Calendar, Clock IC, Format (YYYY:MM:WK:DD:hh:mm:ss/Binary), I2C, 1 V to 5.5 V supply, SOIC-8 NXP
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Each (Supplied on Cut Tape)
A €5.00 re-reeling charge will be added for this product
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100+ €0.784 €0.94 250+ €0.732 €0.88 500+ €0.648 €0.78 1000+ €0.566 €0.68 2500+ €0.555 €0.67 |
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PCF8563T/5,518
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2775929 |
Calendar, Clock IC, Format (YYYY:MM:WK:DD:hh:mm:ss/Binary), I2C, 1 V to 5.5 V supply, SOIC-8 NXP
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Each (Supplied on Cut Tape) |
1+ €1.13 €1.36 10+ €0.959 €1.15 50+ €0.872 €1.05 100+ €0.784 €0.94 250+ €0.732 €0.88 500+ €0.648 €0.78 1000+ €0.566 €0.68 2500+ €0.555 €0.67 More Pricing... |
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YYYY:MM:WK:DD:Hr:Min:Secs | Binary | Calendar, Clock | 1V | 5.5V | SOIC | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS3231S#
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2519295 |
RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V, WSOIC-16 ANALOG DEVICES
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1+ €10.69 €12.83 10+ €9.65 €11.58 46+ €9.20 €11.04 138+ €7.99 €9.59 276+ €7.63 €9.16 506+ €6.96 €8.35 1012+ €6.73 €8.08 More Pricing... |
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YY-MM-DD | HH:MM:SS | RTC | 2.3V | 5.5V | WSOIC | 16Pins | I2C | 0°C | 70°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||