ANALOG DEVICES Real Time Clocks

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Our range of Analog Devices Real Time Clock (RTC) ICs includes both parallel and serial types, as well as a 1-wire device.

RTC ICs are used in electronic circuits to keep track of time relative to the “real” world. Maintaining accurate time is critical, especially under periods of severe system stress or when the power of the main device is off. During these times, RTC ICs must provide robust performance and will often draw power from an auxiliary battery or supercapacitor.

As expected, power consumption is a key factor in most real-time clock designs, in addition to accuracy, ruggedness, and small package size. Analog Devices offers a wide variety of highly accurate, low power, small package, and microelectromechanical systems (MEMS)-based real-time clocks to suit any of your solution needs.

1-Wire Real-Time Clocks

The DS2417 1-Wire® time chip with interrupt offers a simple solution for storing and retrieving vital time information with minimal hardware. The DS2417 contains a unique lasered ROM and a real-time clock/calendar implemented as a binary counter. Only one pin is required for communication with the device.

Parallel Address RTCs

Products with parallel addressing offer simplicity of implementation and high data throughput.

Serial Address RTCs

Most modern RTCs reduce the number of pins required by supporting a serial interface.

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DS3231S#T&R
DS3231S#T&R - RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V supply, SOIC-16

2798759

RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V supply, SOIC-16

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2798759RL in Re-reel

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Day; Date; Month; Year HH:MM:SS RTC 2.3V 5.5V SOIC 16Pins I2C 0°C 70°C
DS1390U-33+T&R
DS1390U-33+T&R - Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10

2515476

Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10

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2515476RL in Re-reel

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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
DS1390U-33+T&R
DS1390U-33+T&R - Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10

2515476RL

Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10

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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
DS3232S#T&R
DS3232S#T&R - RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 2.3V to 5.5V Supply, SOIC-20

2830851

RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 2.3V to 5.5V Supply, SOIC-20

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2830851RL in Re-reel

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Day; Date; Month; Year HH:MM:SS Alarm RTC - - SOIC - I2C - -
DS3232S#T&R
DS3232S#T&R - RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 2.3V to 5.5V Supply, SOIC-20

2830851RL

RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 2.3V to 5.5V Supply, SOIC-20

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DS3231S#T&R
DS3231S#T&R - RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V supply, SOIC-16

2798759RL

RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V supply, SOIC-16

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Day; Date; Month; Year HH:MM:SS RTC 2.3V 5.5V SOIC 16Pins I2C 0°C 70°C
DS3231S#T&R
DS3231S#T&R - RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V supply, SOIC-16

279875901

RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V supply, SOIC-16

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DS3232S#T&R
DS3232S#T&R - RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 2.3V to 5.5V Supply, SOIC-20

283085101

RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 2.3V to 5.5V Supply, SOIC-20

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DS1390U-33+T&R
DS1390U-33+T&R - Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10

251547601

Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10

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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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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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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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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

ANALOG DEVICES

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Day; Date; Month; Year HH:MM:SS Alarm RTC 4.5V 5.5V EDIP 24Pins Multiplexed 0°C 70°C
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

ANALOG DEVICES

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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

ANALOG DEVICES

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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

ANALOG DEVICES

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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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DS1340U-33+
DS1340U-33+ - Real Time Clock/Calendar IC, Trickle Charger, I2C, HH:MM:SS, Day; Date; Month; Year, 5.5 V, µSOP-8

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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Day; Date; Month; Year HH:MM:SS RTC - - µSOP - I2C - -
DS1392U-33+
DS1392U-33+ - Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10

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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DS1744WP-120IND+
DS1744WP-120IND+ - RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS), Bytewide, 2.97V to 3.63V, PWRCP-34

2515498

RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS), Bytewide, 2.97V to 3.63V, PWRCP-34

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DS1554W-120IND+
DS1554W-120IND+ - RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), Bytewide, 2.97V to 3.63V, EDIP-32

2515521

RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), Bytewide, 2.97V to 3.63V, EDIP-32

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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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DS1744W-120+
DS1744W-120+ - RTC, Timekeeper NVSRAM, Bytewide, 2.97 V to 3.63 V, EDIP-28

2515517

RTC, Timekeeper NVSRAM, Bytewide, 2.97 V to 3.63 V, EDIP-28

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DS17487-5+
DS17487-5+ - Alarm RTC IC, Format (Day/Date/Month/Year hh:mm:ss), Multiplexed, 4.5 V to 5.5 V supply, EDIP-24

2515436

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