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 DS12CR887-5+

IC RTC CLK/CALENDAR PAR 24-EDIP

10.57

Renesas Electronics America Inc. CDP68HC68T1MZ

IC RTC CLK/CALENDAR SPI 20-SOIC

11.14

Maxim Integrated DS1501YZ+

IC RTC CLK/CALENDAR PAR 28-SOIC

10.5

Maxim Integrated DS12885SN+

IC RTC CLK/CALENDAR PAR 24-SOIC

8.15

Maxim Integrated DS12885S+

IC RTC CLK/CALENDAR PAR 24-SOIC

7.41

Maxim Integrated DS1685SN-3+

IC RTC CLK/CALENDAR PAR 24-SOIC

7.16

Maxim Integrated DS1305N+

IC RTC CLK/CALENDAR SPI 16-DIP

6.37

Maxim Integrated DS1685E-3+

IC RTC CLK/CALENDAR PAR 24-TSSOP

6.16