Real Time Clocks

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Real-Time Clock products offer a diverse range of real-time clock (RTC) solutions for networking and embedded applications. The primary function of RTC is to keep time and calendar data.

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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DS1337+
DS1337+ - RTC IC, Date Time Format (Day/Date/Month/Year ss:mm:hh), I2C, Serial, 1.8 V to 5.5 V, DIP-8

2518743

RTC IC, Date Time Format (Day/Date/Month/Year ss:mm:hh), I2C, Serial, 1.8 V to 5.5 V, DIP-8

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DS1302S+
DS1302S+ - RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, SOIC-8

2519293

RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, SOIC-8

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DS1302SN+
DS1302SN+ - RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, WSOIC-8

2515359

RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, WSOIC-8

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Day; Date; Month; Year HH:MM:SS RTC 2V 5.5V WSOIC 8Pins Serial -40°C 85°C -
M41T80M6F
M41T80M6F - RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS:hh), I2C, 2V to 5.5V Supply, SOIC-8

2806830

RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS:hh), I2C, 2V to 5.5V Supply, SOIC-8

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Day; Date; Month; Year; Century HH:MM:SS:hh Alarm RTC - - SOIC - I2C - - -
MCP7940M-I/MS
MCP7940M-I/MS - RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, MSOP-8

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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DD:MM:YYYY HH:MM:SS RTC 1.8V 5.5V MSOP 8Pins I2C -40°C 85°C AEC-Q100
RV-8564-C2
RV-8564-C2 - RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.2 V to 5.5 V, SON-10

1539389

RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.2 V to 5.5 V, SON-10

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1539389RL in Re-reel

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MAX31328NELB+
MAX31328NELB+ - Real Time Clock, Alarm RTC, I2C, 12Hr / 24Hr, 2.3 V to 5.5 V, LGA-10, -40 °C to 85 °C

3677599

Real Time Clock, Alarm RTC, I2C, 12Hr / 24Hr, 2.3 V to 5.5 V, LGA-10, -40 °C to 85 °C

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Day; Date; Month; Year 12Hr / 24Hr Alarm RTC - - LGA - I2C - - -
DS17887-5+
DS17887-5+ - Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Multiplexed, 4.5 V to 5.5 V, EDIP-24

2515438

Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Multiplexed, 4.5 V to 5.5 V, EDIP-24

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Day; Date; Month; Year HH:MM:SS Alarm RTC 4.5V 5.5V EDIP 24Pins Multiplexed 0°C 70°C -
M48T37V-10MH1F
M48T37V-10MH1F - RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS), Parallel, 3V to 3.6V Supply, SOIC-44

3129609

RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS), Parallel, 3V to 3.6V Supply, SOIC-44

STMICROELECTRONICS

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Day; Date; Month; Year; Century HH:MM:SS RTC - - SOIC - Parallel - - -
MCP79412T-I/MNY
MCP79412T-I/MNY - Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, I2C, 1.8 V to 5.5 V, TDFN-8

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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2361123RL in Re-reel

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YYYY:MM:WK:DD:Hr:Min:Secs 12Hr / 24Hr Alarm RTC - - TDFN - I2C - - AEC-Q100
DS1388Z-33+
DS1388Z-33+ - RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), I2C, 2.97 V to 3.63 V, NSOIC-8

2515353

RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), I2C, 2.97 V to 3.63 V, NSOIC-8

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M48T58Y-70MH1F
M48T58Y-70MH1F - RTC, Clock/Calendar, Date Time Format (YY-MM-DD-dd, HH:MM:SS), Parallel, 4.5V to 5.5V, SOIC-28

2849896

RTC, Clock/Calendar, Date Time Format (YY-MM-DD-dd, HH:MM:SS), Parallel, 4.5V to 5.5V, SOIC-28

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YY-MM-DD-dd HH:MM:SS Calendar, Clock 4.5V 5.5V SOIC 28Pins Parallel 0°C 70°C -
MCP7940NT-I/MNY
MCP7940NT-I/MNY - RTC, Clock/Calendar, Date Time Format (YY-MM-DD-dd, HH:MM:SS), I2C, 1.8V to 5.5V Supply, TDFN-8

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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2851655RL in Re-reel

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YY-MM-DD-dd HH:MM:SS RTCC - - TDFN - I2C - - -
DS1248Y-70+
DS1248Y-70+ - RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), Bytewide, 4.5 V to 5.5 V, EDIP-32

2515444

RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), Bytewide, 4.5 V to 5.5 V, EDIP-32

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RV-3029-C2-TA-QC-OPT.A
RV-3029-C2-TA-QC-OPT.A - RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), I2C, 1.3 V to 5.5 V, SON-10

2358507

RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), I2C, 1.3 V to 5.5 V, SON-10

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YYYY:MM:DD:Hr:Min:Secs 24Hr RTC - - SON - I2C - - -
RV-3049-C2-TA-QC-OPT.A
RV-3049-C2-TA-QC-OPT.A - RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), SPI, 1.3 V to 5.5 V, SON-10

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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YYYY:MM:DD:Hr:Min:Secs 24Hr RTC - - SON - SPI - - -
PCF85263AUKZ
PCF85263AUKZ - Real-Time Clock, I2C, 0.9 V to 5.5V, HH:MM:SS:hh, Day; Date; Month; Year, WLCSP-12

3770343

Real-Time Clock, I2C, 0.9 V to 5.5V, HH:MM:SS:hh, Day; Date; Month; Year, WLCSP-12

NXP

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Day; Date; Month; Year HH:MM:SS:hh Alarm RTC - - WLCSP - I2C - - -
RV-3049-C3-TB-QA-OPT.A
RV-3049-C3-TB-QA-OPT.A - RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), SPI, 1.3 V to 5.5 V, SON-10

2358520

RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), SPI, 1.3 V to 5.5 V, SON-10

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YYYY:MM:DD:Hr:Min:Secs 24Hr RTC - - SON - SPI - - -
DS1672U-33+
DS1672U-33+ - RTC IC, Date Time Format (Binary), I2C, 2.97 V to 3.63 V, µSOP-8

2515400

RTC IC, Date Time Format (Binary), I2C, 2.97 V to 3.63 V, µSOP-8

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MCP795W10-I/SL
MCP795W10-I/SL - Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, SPI, 1.8 V to 3.6 V, SOIC-14

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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YYYY:MM:WK:DD:Hr:Min:Secs 12Hr / 24Hr Alarm RTC 1.8V 3.6V SOIC 14Pins SPI -40°C 85°C AEC-Q100
DS1342U+
DS1342U+ - Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, µSOP-8

2515385

Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, µSOP-8

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DS1501YZ+
DS1501YZ+ - RTC IC, Date Time Format (Day/Date/Month/Year/Century hh:mm:ss), Bytewide, 4.5 V to 5.5 V, WSOIC-28

2515419

RTC IC, Date Time Format (Day/Date/Month/Year/Century hh:mm:ss), Bytewide, 4.5 V to 5.5 V, WSOIC-28

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RV-8564-C2
RV-8564-C2 - RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.2 V to 5.5 V, SON-10

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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MCP79412T-I/MNY
MCP79412T-I/MNY - Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, I2C, 1.8 V to 5.5 V, TDFN-8

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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YYYY:MM:WK:DD:Hr:Min:Secs 12Hr / 24Hr Alarm RTC - - TDFN - I2C - - AEC-Q100
DS1391U-3+
DS1391U-3+ - Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.7 V to 3.3 V, µSOP-10

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

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