Real Time Clocks

Real Time Clocks (RTCs) provide time and/or date information in almost any electronic device which needs to keep accurate time. The clock types are binary counter, clock/calendar/supervisor, elapsed time counter, phantom time chip, portable system controller, temperature recorder, time event recorder, and timer clock peripheral.  They contain memory sizes ranging from 2 B to 2 MB and have interface options of I2C, Parallel, Serial, SPI, 1-Wire, 2-Wire, 3-Wire, and 4-Wire.

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Maxim Integrated DS1392U-3+

IC RTC CLK/CALENDAR SER 10-USOP

3.82

Maxim Integrated DS1374U-3+

IC RTC BINARY CNT I2C 10-USOP

3.7

Maxim Integrated DS1340U-18+

IC RTC CLK/CALENDAR I2C 8-USOP

3.7

Maxim Integrated DS1391U-3+

IC RTC CLK/CALENDAR SPI 10-USOP

3.7

Renesas Electronics America Inc. ISL12026IVZ

IC RTC CLK/CALENDAR I2C 8-TSSOP

3.34

Texas Instruments BQ4802LYPWR

IC RTC CLK/CALENDAR PAR 28TSSOP

0

Maxim Integrated DS1341U+

IC RTC CLK/CALENDAR I2C 8-USOP

2.9

Renesas Electronics America Inc. ISL12008IB8Z

IC RTC CLK/CALENDAR I2C 8-SOIC

2.8