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
RTC-72423B3: ROHS Epson IC RTC CLK/CALENDAR PAR 24-SOP 678 $0.00
DS1343E-3+ Maxim Integrated IC RTC CLK/CALENDAR SPI 20-TSSOP 148 $4.83
MCP795W22-I/ST Microchip Technology IC RTC CLK/CALENDAR SPI 14-TSSOP 209 $1.77
MCP795W21-I/ST Microchip Technology IC RTC CLK/CALENDAR SPI 14-TSSOP 288 $1.77
M41T01M6F STMicroelectronics IC RTC CLK/CALENDAR I2C 8-SOIC 2500 $0.00
PT7C433833AZEEX Diodes Incorporated IC RTC MOD LOW POWER 8TDFN 3000 $0.00
S-35190A-J8T1U ABLIC U.S.A. Inc. IC RTC CLK/CALENDAR SER 8SOP 3755 $0.00
DS1556-70IND+ Maxim Integrated IC RTC CLK/CALENDAR PAR 32-EDIP 128 $39.48
DS1554-70IND+ Maxim Integrated IC RTC CLK/CALENDAR PAR 32-EDIP 151 $29.24
DS17885S-3+ Maxim Integrated IC RTC CLK/CALENDAR PAR 24-SOIC 180 $16.64