Clock, Timing
42,017 partsThe most used on boards first, each with its symbol and footprint where the library has them.
NE555D
SOIC-80℃~+70℃ 10mA 4.5V~16V SOIC-8 555 Timers / Counters ROHSTexas InstrumentsTimers / CountersNE555DR
SOP-80℃~+70℃ 100kHz 4.5V~16V SOP-8 555 Timers / Counters ROHSUMWTimers / CountersPCF8563T/5
SO-8-40℃~+85℃ 0.25uA 1V~5.5V Battery low-voltage detection、Programmable clock output、Alarm function、Countdown timer I2C Yes SO-8 Real Time Clocks ROHSNXP SemiconductorsReal Time ClocksPCF8523T/1
SO-8-40℃~+85℃ 1.6V~5.5V 150nA Backup power management and battery charging、Alarm function、Sleep/Wake control Built-in I2C Yes SO-8 Real Time Clocks ROHSNXP SemiconductorsReal Time Clocks
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / CountersTLC555CD
SOIC-80℃~+70℃ 2.1MHz 2V~15V 360uA SOIC-8 555 Timers / Counters ROHSTexas InstrumentsTimers / CountersTLC555ID
SOIC-8-40℃~+85℃ 2.1MHz 360uA 3V~15V SOIC-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
BM8563EMA
MSOP-8-40℃~+85℃ 0.5uA 1.2V~5.5V 500nA Battery low-voltage detection、Programmable clock output、Alarm function、ESD/Overvoltage protection、Countdown timer External I2C Yes MSOP-8 Real Time Clocks ROHSGATEMODEReal Time ClocksPCF85163T/1
SOIC-81.8V~5.5V Battery low-voltage detection、Programmable clock output、Alarm function、Periodic interrupt output、Countdown timer I2C SOIC-8 Real Time Clocks ROHSNXP SemiconductorsReal Time ClocksNE555DR-JSM
SOP-8-20℃~+70℃ 1 1.5mA 200mA 4.5V~15V Adjustable duty cycle oscillation、Reset function SOP-8 555 Timers / Counters ROHSJSMSEMITimers / CountersDS3231MZ+TRL
SOIC-8-40℃~+85℃ 100nA 2.3V~5.5V 200uA Built-in I2C Temperature compensation、Backup power management and battery charging、Alarm function、Periodic interrupt output Yes SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
SI5351A-B-GTR
MSOP-10-40℃~+85℃ 1.71V~3.6V 200MHz 3 I2C MSOP-10 Clock Generators, PLLs, Frequency Synthesizers ROHSSilicon LabsClock Generators, PLLs, Frequency SynthesizersDS1302Z+T&R
SOIC-80℃~+70℃ 1nA 2V~5.5V 300nA Backup power management and battery charging、InsideSRAM/NVRAM、Sleep/Wake control External SPI SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time ClocksDS1307Z+T&R
SOIC-80℃~+70℃ 1.5mA 300nA 4.5V~5.5V Backup power management and battery charging、InsideSRAM/NVRAM、Programmable clock output External I2C SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
NE555N
DIP-80℃~+70℃ DIP-8 555 Timers / Counters ROHSHGSEMITimers / Counters
CD4046BE
PDIP-16-55℃~+125℃ 2.4MHz 3V~18V External PDIP-16 Clock Generators, PLLs, Frequency Synthesizers ROHSTexas InstrumentsClock Generators, PLLs, Frequency SynthesizersDS1307ZN+T&R
SOP-8-40℃~+85℃ 1.5mA 300nA 4.5V~5.5V Backup power management and battery charging、InsideSRAM/NVRAM、Programmable clock output External I2C No SOP-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
XRCGB27M120F3M00R0
SMD2016-4PSMD2016-4P Timers / Counters ROHSMurataTimers / Counters
RX8025T-UB
SOP-14-208mil-40℃~+85℃ 0.72uA 1.8V~5.5V 800nA Built-in I2C Temperature compensation、InsideSRAM/NVRAM、Programmable clock output、Alarm function、Built-in crystal oscillator、Periodic interrupt output Yes SOP-14-208mil Real Time Clocks ROHSSeiko EpsonReal Time ClocksNE555DBS
SOP-8SOP-8 555 Timers / Counters ROHSGREENMICRO555 Timers / Counters
CDCLVC1102PW
TSSOP-8-40℃~+85℃ 1 2 2.3V~3.6V 250MHz TSSOP-8 Clock Buffers, Drivers, Distributors ROHSTexas InstrumentsClock Buffers, Drivers, DistributorsCDCLVC1104PW
TSSOP-8-40℃~+85℃ 1 2.3V~3.6V 250MHz 4 TSSOP-8 Clock Buffers, Drivers, Distributors ROHSTexas InstrumentsClock Buffers, Drivers, DistributorsLK8563S
MSOP-8-40℃~+85℃ 1.2V~5.5V 2uA 2uA Built-in I2C Programmable clock output、Alarm function、Countdown timer Yes MSOP-8 Real Time Clocks ROHSLANKEReal Time ClocksPCF8563TS(UMW)
MSOP-8Real Time ClocksUMWGM1302
SOIC-8-40℃~+85℃ 1.2mA 1nA 2V~5.5V Backup power management and battery charging、InsideSRAM/NVRAM External SPI SOIC-8 Real Time Clocks ROHSGATEMODEReal Time ClocksHT1302ARZ
SOP-8-150mil-40℃~+85℃ 1nA 2V~5.5V 300nA Backup power management and battery charging、InsideSRAM/NVRAM、Locking and tamper-proof、Sleep/Wake control External SOP-8-150mil Real Time Clocks ROHSHTCSEMIReal Time ClocksPCF8563T-NF
SOP-8SOP-8 Real Time Clocks ROHSNyfeaReal Time ClocksISL1208IB8Z-TK
SOIC-8-40℃~+85℃ 2.7V~5.5V 400nA External I2C Temperature compensation、Backup power management and battery charging、InsideSRAM/NVRAM、Programmable clock output、Alarm function、Periodic interrupt output Yes SOIC-8 Real Time Clocks ROHSRenesas ElectronicsReal Time ClocksBM8563EHA
TSSOP-8-40℃~+85℃ 0.5uA 1.2V~5.5V 500nA Battery low-voltage detection、Programmable clock output、Alarm function、Countdown timer External I2C Yes TSSOP-8 Real Time Clocks ROHSGATEMODEReal Time ClocksNE555N(XBLW)
DIP-80℃~+70℃ 1 200mA 3mA 4.5V~15V Reset function、Shutdown control DIP-8 555 Timers / Counters ROHSXBLWTimers / Counters