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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Renesas Electronics America Inc. ISL1218IBZ-T

IC RTC CLK/CALENDAR I2C 8-SOIC

1.52

Epson RX6110SA:B3 PURE SN

IC RTC CLK/CALENDAR I2C 14-SOP

1.5

Microchip Technology MCP795W20T-I/ST

IC RTC CLK/CALENDAR SPI 14-TSSOP

1.48

Microchip Technology MCP795W12T-I/ST

IC RTC CLK/CALENDAR SPI 14-TSSOP

1.48

Microchip Technology MCP795W11T-I/ST

IC RTC CLK/CALENDAR SPI 14-TSSOP

1.48

Renesas Electronics America Inc. ISL12082IB8Z-T

IC RTC CLK/CALENDAR I2C 8-SOIC

1.45

Epson RX8900CE:UB0

IC RTC CALENDAR I2C 10SMD

1.44

Epson RX8900SA:UB0 PURE SN

IC RTC CLK/CALENDAR I2C 14-SOP

1.44