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.

Part Number Manufacturer Description Quantity Price Option
MCP7940NT-I/MNY Microchip Technology IC RTC CLK/CALENDAR I2C 8-TDFN 3278 $0.00
PCF85063BTL/1,118 NXP USA Inc. IC RTC CLK/CALENDAR SPI 10-HXSON 3563 $0.00
MCP7940NT-E/SN Microchip Technology IC RTC CLK/CALENDAR I2C 8-SOIC 1748 $0.00
MCP7940NT-I/ST Microchip Technology IC RTC CLK/CALENDAR I2C 8-TSSOP 1466 $0.00
MCP7940NT-I/SN Microchip Technology IC RTC CLK/CALENDAR I2C 8-SOIC 4065 $0.00
MCP7940MT-I/MS Microchip Technology IC RTC CLK/CALENDAR I2C 8-MSOP 1598 $0.00
MCP7940MT-I/ST Microchip Technology IC RTC CLK/CALENDAR I2C 8-TSSOP 2332 $0.00
MCP7940MT-I/SN Microchip Technology IC RTC CLK/CALENDAR I2C 8-SOIC 1740 $0.00
M48T35AV-10PC1 STMicroelectronics IC RTC CLK/CALENDAR PAR 28DIP 240 $24.13
DS1340C-18# Maxim Integrated IC RTC CLK/CALENDAR I2C 16-SOIC 664 $6.09