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 | Order Code | Description / Manufacturer | Availability | Price For |
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MCP79412T-I/MNY
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2361123 |
Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, I2C, 1.8 V to 5.5 V, TDFN-8 MICROCHIP
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1+ €1.04 |
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YYYY:MM:WK:DD:Hr:Min:Secs | 12Hr / 24Hr | Alarm RTC | 1.8V | 5.5V | TDFN | 8Pins | I2C | -40°C | 85°C | - | AEC-Q100 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
RV-8564-C2
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1539389 |
RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.2 V to 5.5 V, SON-10 MICRO CRYSTAL
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1+ €5.12 10+ €4.48 25+ €4.18 50+ €3.83 100+ €3.64 250+ €3.44 500+ €3.14 More Pricing... |
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DD:MM:YYYY | HH:MM:SS | RTC | 1.2V | 5.5V | SON | 10Pins | I2C | -40°C | 85°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
DS1337+
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2518743 |
RTC IC, Date Time Format (Day/Date/Month/Year ss:mm:hh), I2C, Serial, 1.8 V to 5.5 V, DIP-8 ANALOG DEVICES
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1+ €3.52 10+ €2.91 50+ €2.75 100+ €2.58 250+ €2.45 500+ €2.21 More Pricing... |
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Day; Date; Month; Year | ss:mm:hh | RTC | 1.8V | 5.5V | DIP | 8Pins | I2C, Serial | -40°C | 85°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
DS1248Y-70+
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2515444 |
RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), Bytewide, 4.5 V to 5.5 V, EDIP-32 ANALOG DEVICES
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1+ €37.22 10+ €34.53 30+ €33.29 |
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Day; Date; Month; Year | HH:MM:SS:hh | RTC | 4.5V | 5.5V | EDIP | 32Pins | Bytewide | 0°C | 70°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
M41T80M6F
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2806830 |
RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS:hh), I2C, 2V to 5.5V Supply, SOIC-8 STMICROELECTRONICS
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1+ €2.41 10+ €2.10 25+ €1.99 50+ €1.86 100+ €1.73 250+ €1.62 500+ €1.46 1000+ €1.23 More Pricing... |
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Day; Date; Month; Year; Century | HH:MM:SS:hh | Alarm RTC | 2V | 5.5V | SOIC | 8Pins | I2C | -40°C | 85°C | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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M48T58Y-70MH1F
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2849896 |
RTC, Clock/Calendar, Date Time Format (YY-MM-DD-dd, HH:MM:SS), Parallel, 4.5V to 5.5V, SOIC-28 STMICROELECTRONICS
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1+ €15.17 10+ €13.69 25+ €13.12 50+ €12.34 100+ €11.56 |
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YY-MM-DD-dd | HH:MM:SS | Calendar, Clock | 4.5V | 5.5V | SOIC | 28Pins | Parallel | 0°C | 70°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1302S+
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2519293 |
RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, SOIC-8 ANALOG DEVICES
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1+ €4.44 10+ €3.77 88+ €3.26 176+ €3.18 264+ €3.09 528+ €2.77 1056+ €2.33 More Pricing... |
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YY-MM-DD | HH:MM:SS | RTC | 2V | 5.5V | SOIC | 8Pins | 3 Wire, Serial | 0°C | 70°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1302SN+
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2515359 |
RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, WSOIC-8 ANALOG DEVICES
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1+ €4.10 10+ €3.41 88+ €2.86 176+ €2.72 264+ €2.57 |
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Day; Date; Month; Year | HH:MM:SS | RTC | 2V | 5.5V | WSOIC | 8Pins | Serial | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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MAX31328NELB+
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3677599 |
Real Time Clock, Alarm RTC, I2C, 12Hr / 24Hr, 2.3 V to 5.5 V, LGA-10, -40 °C to 85 °C ANALOG DEVICES
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1+ €4.09 10+ €3.55 25+ €3.47 100+ €2.95 490+ €2.51 980+ €2.16 2940+ €2.05 5390+ €2.01 More Pricing... |
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Day; Date; Month; Year | 12Hr / 24Hr | Alarm RTC | 2.3V | 5.5V | LGA | 10Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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RV-3049-C3-TB-QA-OPT.A
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2358520 |
RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), SPI, 1.3 V to 5.5 V, SON-10 MICRO CRYSTAL
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1+ €6.69 10+ €5.85 25+ €5.46 50+ €5.00 100+ €4.75 250+ €4.48 500+ €4.10 More Pricing... |
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YYYY:MM:DD:Hr:Min:Secs | 24Hr | RTC | 1.3V | 5.5V | SON | 10Pins | SPI | -40°C | 125°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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MCP7940M-I/MS
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2098889 |
RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, MSOP-8 MICROCHIP
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1+ €0.599 25+ €0.558 100+ €0.539 |
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DD:MM:YYYY | HH:MM:SS | RTC | 1.8V | 5.5V | MSOP | 8Pins | I2C | -40°C | 85°C | - | AEC-Q100 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1388Z-33+
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2515353 |
RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), I2C, 2.97 V to 3.63 V, NSOIC-8 ANALOG DEVICES
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1+ €5.64 10+ €5.00 25+ €4.86 100+ €4.22 300+ €4.03 500+ €3.67 1000+ €3.13 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS:hh | RTC | 2.97V | 3.63V | NSOIC | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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MCP79412T-I/MNY
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2361123RL |
Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, I2C, 1.8 V to 5.5 V, TDFN-8 MICROCHIP
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Each (Supplied on Cut Tape)
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YYYY:MM:WK:DD:Hr:Min:Secs | 12Hr / 24Hr | Alarm RTC | 1.8V | 5.5V | TDFN | 8Pins | I2C | -40°C | 85°C | - | AEC-Q100 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DP8573AV/NOPB .
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2492605 |
RTC IC, Date Time Format (BCD 12Hr / 24Hr), Parallel, 4.5 V to 5.5 V, LCC-28 TEXAS INSTRUMENTS
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1+ €16.13 10+ €14.88 25+ €13.87 50+ €13.29 100+ €12.70 |
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BCD | 12Hr / 24Hr | RTC | 4.5V | 5.5V | LCC | 28Pins | Parallel | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1392U-33+
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2515397 |
Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10 ANALOG DEVICES
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1+ €2.80 10+ €2.37 50+ €2.32 |
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Day; Date; Month; Year | HH:MM:SS:hh | Alarm RTC | 2.97V | 5.5V | µSOP | 10Pins | SPI | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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MCP7940NT-I/MNY
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2851655 |
RTC, Clock/Calendar, Date Time Format (YY-MM-DD-dd, HH:MM:SS), I2C, 1.8V to 5.5V Supply, TDFN-8 MICROCHIP
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1+ €0.845 |
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YY-MM-DD-dd | HH:MM:SS | RTCC | 1.8V | 5.5V | TDFN | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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MCP795W10-I/SL
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2361120 |
Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, SPI, 1.8 V to 3.6 V, SOIC-14 MICROCHIP
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1+ €1.48 25+ €1.38 100+ €1.36 |
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YYYY:MM:WK:DD:Hr:Min:Secs | 12Hr / 24Hr | Alarm RTC | 1.8V | 3.6V | SOIC | 14Pins | SPI | -40°C | 85°C | - | AEC-Q100 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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RV-3049-C2-TA-QC-OPT.A
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2358514 |
RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), SPI, 1.3 V to 5.5 V, SON-10 MICRO CRYSTAL
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1+ €7.48 10+ €6.55 25+ €6.11 50+ €5.59 100+ €5.32 250+ €5.01 More Pricing... |
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YYYY:MM:DD:Hr:Min:Secs | 24Hr | RTC | 1.3V | 5.5V | SON | 10Pins | SPI | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1340U-33+
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2515382 |
Real Time Clock/Calendar IC, Trickle Charger, I2C, HH:MM:SS, Day; Date; Month; Year, 5.5 V, µSOP-8 ANALOG DEVICES
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1+ €3.81 10+ €3.23 50+ €3.01 100+ €2.79 250+ €2.65 500+ €2.38 More Pricing... |
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Day; Date; Month; Year | HH:MM:SS | RTC | 2.97V | 5.5V | µSOP | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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M48T58Y-70MH1F
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2849896RL |
RTC, Clock/Calendar, Date Time Format (YY-MM-DD-dd, HH:MM:SS), Parallel, 4.5V to 5.5V, SOIC-28 STMICROELECTRONICS
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10+ €13.69 25+ €13.12 50+ €12.34 100+ €11.56 |
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YY-MM-DD-dd | HH:MM:SS | Calendar, Clock | 4.5V | 5.5V | SOIC | 28Pins | Parallel | 0°C | 70°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS17887-5+
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2515438 |
Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Multiplexed, 4.5 V to 5.5 V, EDIP-24 ANALOG DEVICES
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1+ €20.49 14+ €18.90 28+ €18.05 112+ €16.14 252+ €15.92 |
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Day; Date; Month; Year | HH:MM:SS | Alarm RTC | 4.5V | 5.5V | EDIP | 24Pins | Multiplexed | 0°C | 70°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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RV-8564-C2
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1539389RL |
RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.2 V to 5.5 V, SON-10 MICRO CRYSTAL
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100+ €3.64 250+ €3.44 500+ €3.14 |
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DD:MM:YYYY | HH:MM:SS | RTC | 1.2V | 5.5V | SON | 10Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1744WP-120IND+
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2515498 |
RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS), Bytewide, 2.97V to 3.63V, PWRCP-34 ANALOG DEVICES
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1+ €27.72 10+ €26.02 40+ €24.66 |
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Day; Date; Month; Year; Century | HH:MM:SS | RTC | 2.97V | 3.63V | PWRCP | 34Pins | Bytewide | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1672U-33+
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2515400 |
RTC IC, Date Time Format (Binary), I2C, 2.97 V to 3.63 V, µSOP-8 ANALOG DEVICES
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1+ €3.10 10+ €2.62 50+ €2.45 100+ €2.27 250+ €2.15 500+ €1.94 More Pricing... |
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Binary | Binary | RTC | 2.97V | 3.63V | µSOP | 8Pins | I2C | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DS1391U-3+
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2515394 |
Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.7 V to 3.3 V, µSOP-10 ANALOG DEVICES
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1+ €2.81 10+ €2.39 |
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Day; Date; Month; Year | HH:MM:SS:hh | Alarm RTC | 2.7V | 3.3V | µSOP | 10Pins | SPI | -40°C | 85°C | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||