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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Real Time Clocks

Real Time Clocks

Manufacturer	Series	Package/Case	Packaging	Product Status	Programmable	Type	Features	Memory Size	Time Format	Date Format	Interface	Voltage - Supply	Voltage - Supply, Battery	Current - Timekeeping (Max)	Operating Temperature	Mounting Type	Grade	Qualification	Supplier Device Package
ABLIC Inc. Abracon LLC Ambiq Micro, Inc. ams-OSRAM USA INC. Analog Devices Inc./Maxim Integrated Austria Micro Benchmarq Cymbet Corporation Dallas Semiconductor Diodes Incorporated ECS Inc. Elantec EM Microelectronic Epson Harris Corporation Intersil KYOCERA AVX Micro Connectors, Inc. Microchip Technology National Semiconductor Nisshinbo Micro Devices Inc. NXP Semiconductors Raltron Electronics Renesas Rochester Electronics, LLC ROHM Semiconductor Simtek SparkFun Electronics STMicroelectronics Suntsu Electronics, Inc Suzhou Maswell Communication Technology Co. Ltd Texas Instruments	* - 2-Wire™ Artasie C2 C3 C7 C8 EconoRAM LV8571A RA-4574SA RA-8565SA RTC-4543SA RTC-4543SB RTC-4574JE RTC-4574NB RTC-4574SA RTC-72421 RTC-72423 RTC-8564JE RTC-8564NB RX-4035LC RX-4035SA RX-4045NB RX-4045SA RX-4571LC RX-4571NB RX-4571SA RX-4574LC RX-4575LC RX-4581NB RX-4801SA RX-4803LC RX-4803SA RX-8025NB RX-8025SA RX-8035LC RX-8035SA RX-8564LC RX-8571LC RX-8571NB RX-8571SA RX-8581JE RX-8581NB RX-8581SA RX-8731LC RX-8801SA RX-8803LC RX-8803SA RX4111CE RX4901CE RX6110SA RX8010SJ RX8111CE RX8130CE RX8804CE RX8900CE RX8900SA RX8901CE S-35190A H S-35390A H S-35399A03 Timekeeper® Timekeeper®, CAPHAT™	- 10-LFSOP (0.173", 4.40mm Width) 10-LFSOP, 10-MSOP (0.110", 2.80mm Width) 10-LLGA 10-SMD Module 10-SMD, No Lead 10-TDFN Exposed Pad 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 10-VCDFN 10-VFDFN Exposed Pad 10-VFSOP, 10-MSOP (0.110", 2.80mm Width) 10-WFDFN Exposed Pad 10-XFDFN Exposed Pad 12-TFSOJ (0.094", 2.40mm Width) 12-UFBGA, WLBGA 12-VFDFN Exposed Pad 12-WFBGA, WLBGA 12-XFBGA, WLCSP 12-XFQFN Exposed Pad 14-DIP Module (0.335", 8.51mm) 14-SOIC (0.154", 3.90mm Width) 14-SOIC (0.197", 5.00mm Width) 14-TSSOP (0.173", 4.40mm Width) 14-WFDFN Exposed Pad 16-DIP (0.300", 7.62mm) 16-LFDFN Exposed Pad 16-LSSOP (0.173", 4.40mm Width) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.295", 7.50mm Width) 16-SSOP (0.209", 5.30mm Width) 16-UFQFN Exposed Pad 16-VFDFN Exposed Pad 16-VFQFN Exposed Pad 16-VQFN Exposed Pad 16-XFQFN Exposed Pad 168-BBGA Module 168-PBGA Module 18-DIP (0.300", 7.62mm) 18-SOIC (0.213", 5.40mm Width) 18-SOX, 18-SOIC with Crystal (7.5mm Width) 18-XFQFN Exposed Pad 20-LSSOJ (0.213", 5.40mm Width) 20-PowerLFDFN 20-SOIC (0.295", 7.50mm Width) 20-SSOP (0.154", 3.90mm Width) 20-SSOP (0.209", 5.30mm Width) 20-TSSOP (0.173", 4.40mm Width) 20-VQFN Exposed Pad 22-LFDFN 22-SMD Module Exposed Pad 22-SMD, 20 Leads, Flat Leads 24-CDIP (0.300", 7.62mm) 24-DIP (0.300", 7.62mm) 24-DIP (0.600", 15.24mm) 24-DIP Module (0.600", 15.24mm) 24-DIP Module (0.61", 15.49mm) 24-SOIC (0.295", 7.50mm Width) 24-SOIC (0.311", 7.90mm Width) 24-SOP (0.213", 5.40mm Width) 24-SSOP (0.154", 3.90mm Width) 24-TSSOP (0.173", 4.40mm Width) 28-DIP (0.600", 15.24mm) 28-DIP Module (0.600", 15.24mm) 28-DIP Module (0.61", 15.49mm) 28-DIP Module (0.61", 15.49mm), 23 Leads 28-LCC (J-Lead) 28-SOIC (0.295", 7.50mm Width) 28-SOIC (0.337", 8.56mm Width) 28-SOIC (0.337", 8.56mm Width) with SNAPHAT Sockets 28-SOIC (0.345", 8.77mm Width) with SNAPHAT Sockets 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets 28-TSSOP (0.173", 4.40mm Width) 28-TSSOP (0.465", 11.80mm Width) 32-DIP Module (0.600", 15.24mm) 32-DIP Module (0.61", 15.49mm) 32-DIP Module (0.610", 15.49mm) 32-LFSOP (0.724", 18.40mm Width) 32-TQFP 34-LPM 34-PowerCap™ Module 36-DIP Module (0.610", 15.49mm) 44-BSOP (0.337", 8.56mm Width) 44-BSOP (0.337", 8.56mm Width) requires SNAPHAT 44-QFP 48-BBGA 48-LQFP 6-SMD, J-Lead 6-VBGA, FCBGA 6-VFBGA, FCBGA 6-WDFN Exposed Pad 8-DIP (0.300", 7.62mm) 8-LCC 8-LSSOP (0.173", 4.40mm Width) 8-SMD 8-SMD, Flat Leads 8-SOIC (0.154", 3.90mm Width) 8-SOIC (0.173", 4.40mm Width) 8-SOIC (0.173", 4.40mm Width) Exposed Pad 8-SOIC (0.209", 5.30mm Width) 8-SOIC (0.295", 7.50mm Width) 8-TSSOP (0.173", 4.40mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-UFDFN 8-UFDFN Exposed Pad 8-VDFN Exposed Pad 8-VFBGA, WLBGA 8-VSSOP, 8-MSOP (0.110", 2.80mm Width) 8-WCDFN 8-WDFN Exposed Pad 8-WFBGA, WLBGA 8-WFDFN Exposed Pad 8-XFBGA, WLCSP 80-BBGA Die Module	Bag Bulk Strip Tape & Reel (TR) Tray Tube	Active Discontinued at Key Last Time Buy Not For New Designs Obsolete	- Not Verified Verified	- Binary Counter Clock/Calendar Clock/Calendar/Supervisor Elapsed Time Counter Phantom Time Chip Portable System Controller Real Time Clock (RTC) Temperature Recorder Time Event Recorder Timer Clock Peripheral (TCP)	- Alarm Alarm, Backup Supply Charger, Leap Year, RAM Alarm, Battery Switch, Clock Output Hz-MHz, Event Input, Temperature Alarm, Timer, Trickle Charge with Charge Pump Alarm, Battery Switch, EEPROM, External Event Interrupt, Leap Year, Programmable Clock Output, RAM, Timer, Trickle Charger Alarm, Battery Switch, Leap Year, Programmable Clock Output, Timer, Watchdog Timer Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output Alarm, Daylight Savings, Leap Year, RAM Alarm, Daylight Savings, Leap Year, SRAM Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer Alarm, Daylight Savings, NVRAM, NVSRAM, Square Wave Output, Y2K Alarm, Daylight Savings, NVSRAM Alarm, Daylight Savings, SRAM Alarm, EEPROM Alarm, EEPROM, Leap Year, Programmable Clock Output, RAM, Temperature, Timer, Trickle Charger Alarm, EEPROM, Leap Year, RAM, Trickle-Charger Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Trickle-Charger Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Trickle-Charger Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Watchdog Timer Alarm, EEPROM, Leap Year, Square Wave Output, Trickle-Charger Alarm, EEPROM, Leap Year, SRAM, Supervisor, Watchdog Timer, Y2K Alarm, EEPROM, Leap Year, Supervisor, Trickle-Charger, Watchdog Timer Alarm, EEPROM, Leap Year, Supervisor, Watchdog Timer Alarm, EEPROM, Leap Year, Unique ID Alarm, EEPROM, RAM, Trickle Charger Alarm, EEPROM, TCXO/Crystal, Trickle-Charger Alarm, External Event Interrupt, Leap Year, Programmable Clock Output, RAM, Timer Alarm, FRAM, Leap Year, Square Wave Output, TCXO/Crystal Alarm, Leap Year Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger Alarm, Leap Year, NVRAM, Square Wave Output, Trickle-Charger Alarm, Leap Year, NVRAM, Square Wave Output, Watchdog Timer Alarm, Leap Year, NVSRAM, Square Wave Output Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K Alarm, Leap Year, NVSRAM, Trickle-Charger Alarm, Leap Year, NVSRAM, Watchdog Timer Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K Alarm, Leap Year, NVSRAM, Y2K Alarm, Leap Year, Offset Compensation, Programmable Clock Output, RAM, Timer Alarm, Leap Year, Programmable Clock Output, RAM, Timer Alarm, Leap Year, Programmable Clock Output, Timer Alarm, Leap Year, Programmable Clock Output, Watchdog Timer Alarm, Leap Year, RAM Alarm, Leap Year, RAM, Square Wave Output, SRAM, Trickle Charger Alarm, Leap Year, RAM, Square Wave Output, Supervisor, Trickle Charger, Unique ID, Watchdog Timer Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger, Unique ID, Watchdog Timer Alarm, Leap Year, RAM, SRAM Alarm, Leap Year, RAM, Trickle Charger Alarm, Leap Year, Square Wave Output Alarm, Leap Year, Square Wave Output, SRAM Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Watchdog Timer Alarm, Leap Year, Square Wave Output, SRAM, Unique ID Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer Alarm, Leap Year, Square Wave Output, Supervisor, Watchdog Timer, Y2K Alarm, Leap Year, Square Wave Output, TCXO/Crystal Alarm, Leap Year, Square Wave Output, TCXO/Crystal, Watchdog Timer Alarm, Leap Year, Square Wave Output, Trickle-Charger Alarm, Leap Year, Square Wave Output, Unique ID Alarm, Leap Year, Square Wave Output, Watchdog Timer Alarm, Leap Year, SRAM Alarm, Leap Year, SRAM, Trickle-Charger Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer Alarm, Leap Year, SRAM, Watchdog Timer Alarm, Leap Year, Supervisor, Unique ID, Watchdog Timer Alarm, Leap Year, Supervisor, Watchdog Timer Alarm, Leap Year, Trickle-Charger Alarm, Leap Year, Unique ID Alarm, Leap Year, Unique ID, Y2K Alarm, Leap Year, Watchdog Timer Alarm, Leap Year, Watchdog Timer, Y2K Alarm, NVRAM, Square Wave Output, Trickle-Charger, Watchdog Timer Alarm, NVSRAM Alarm, NVSRAM, Square Wave Output Alarm, NVSRAM, Square Wave Output, Y2K Alarm, Programmable Clock Output, RAM, Timer, Trickle Charger, Watchdog Timer Alarm, RAM Alarm, Square Wave Output Alarm, Square Wave Output, SRAM Alarm, Square Wave Output, SRAM, Trickle Charge, Watchdog Timer Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer Alarm, Square Wave Output, Watchdog Timer Alarm, SRAM Alarm, SRAM, Trickle-Charger Alarm, Supervisor, Watchdog Timer Alarm, Watchdog Timer Alarm, Y2K Audio, Leap Year, Trickle-Charger EEPROM, Leap Year EEPROM, Leap Year, NVSRAM EEPROM, Leap Year, NVSRAM, RAM EEPROM, Leap Year, RAM, SRAM EEPROM, Leap Year, Supervisor, Trickle-Charger, Watchdog Timer Leap Year Leap Year, NVSRAM Leap Year, NVSRAM, RAM, Trickle-Charger Leap Year, NVSRAM, Square Wave Output Leap Year, NVSRAM, Square Wave Output, Trickle-Charger Leap Year, NVSRAM, Trickle-Charger Leap Year, NVSRAM, Y2K Leap Year, RAM Leap Year, RAM, Square Wave Output Leap Year, Square Wave Output Leap Year, Square Wave Output, Trickle-Charger Leap Year, Square Wave Output, Y2K Leap Year, SRAM Leap Year, Supervisor Leap Year, Trickle-Charger Leap Year, Watchdog Timer NVSRAM Square Wave Output Square Wave Output, Unique ID Trickle-Charger Unique ID	- 10B 113B 114B 120b 128B 128KB 16B 16B, 32B 1B 236B 240B 242B 256B 2B 2B, 43B 2B, 8B 2KB 2MB 31B 32B 32KB 3B 43B 44B 4KB 50B 512B 512KB 56B 56B, 8KB 64B 64B, 1Kb 7B 80b 8B 8KB 96B	- Binary HH:MM:SS HH:MM:SS (12/24 hr) HH:MM:SS (24 hr) HH:MM:SS:100th (24 hr) HH:MM:SS:hh HH:MM:SS:hh (12/24 hr) HH:MM:SS:hh (24 hr)	- Binary YY-MM-DD YY-MM-DD-dd YYYY-MM-DD	- 1-Wire® and 3-Wire 1-Wire® Serial 2-Wire Serial 3-Wire Serial 3-Wire Serial, 4-Wire Serial 3-Wire Serial, SPI 4-Wire Serial I2C I2C, 2-Wire Serial I2C, Serial I2C, SMBus I2C, SPI Multiplexed Parallel Parallel, Serial Serial SPI SPI, 3-Wire Serial SPI, 4-Wire Serial	- 0.9V ~ 1.8V, 0.9V ~ 5.5V 0.9V ~ 5.5V 0.9V ~ 5.5V, 1.8V ~ 5.5V 1.1V ~ 5.5V 1.1V, 1.2V, 2V ~ 5.5V 1.25V ~ 5.5V 1.2V ~ 5.5V 1.35V ~ 5.5V 1.3V ~ 4.4V 1.3V ~ 5.5V 1.3V ~ 5.5V, 2.1V ~ 5.5V 1.4V ~ 5.5V 1.4V ~ 5.5V, 2.1V ~ 5.5V 1.5V ~ 3.6V 1.5V ~ 4.4V 1.5V ~ 5.5V 1.6V ~ 3.6V 1.6V ~ 5.5V 1.6V ~ 5V, 2.5V ~ 5V 1.71V ~ 1.89V 1.71V ~ 5.5V 1.7V ~ 3.6V 1.7V ~ 5.5V 1.7V ~ 6V 1.8V ~ 2.2V 1.8V ~ 3.6V 1.8V ~ 4.2V 1.8V ~ 5.5V 1.8V ~ 6V 1.9V, 2.6V ~ 5.5V 1V ~ 4.4V 1V ~ 5.5V 2.34V ~ 5.5V 2.38V ~ 5.5V 2.3V ~ 4.5V 2.3V ~ 5.5V 2.4V ~ 5.5V 2.5V ~ 5.5V 2.5V ~ 5V 2.5V ~ 6V 2.63V ~ 5.5V 2.7V ~ 3.3V 2.7V ~ 3.3V, 4.5V ~ 5.5V 2.7V ~ 3.63V 2.7V ~ 3.6V 2.7V ~ 3.7V 2.7V ~ 3.7V, 4.5V ~ 5.5V 2.7V ~ 5.5V 2.7V ~ 6V 2.8V ~ 5.5V 2.97V ~ 3.63V 2.97V ~ 3.63V, 4.5V ~ 5.5V 2.97V ~ 5.5V 2V ~ 5.5V 3.3V ~ 5.5V 3V 3V ~ 3.6V 3V ~ 3.7V 3V ~ 5.5V 3V ~ 6V 3V, 3.3V, 5V 4.5V ~ 5.5V 4.75V ~ 5.25V 4.75V ~ 5.5V 4V ~ 5.5V 5.5V 5V	- 0.9V ~ 3.6V 0.9V ~ 5.5V 1.15V ~ 5.5V 1.1V ~ 5.5V 1.2V ~ 5.5V 1.3V ~ 3.63V 1.3V ~ 3.6V 1.3V ~ 3.7V 1.3V ~ 5.5V 1.4V ~ 3.6V 1.4V ~ 5.5V 1.55V ~ 3.6V 1.5V ~ 3.6V 1.5V ~ 3.7V 1.5V ~ 5.5V 1.6V ~ 3.6V 1.6V ~ 3.7V 1.6V ~ 5.5V 1.6V ~ 5V 1.7V ~ 3.6V 1.8V ~ 4.2V 1.8V ~ 5.5V 1V ~ 5.5V 2.2V ~ 3.2V 2.2V ~ 5.1V 2.2V ~ 6V 2.3V ~ 3.6V 2.3V ~ 4.5V 2.3V ~ 4V 2.3V ~ 5.5V 2.4V ~ 3.5V 2.4V ~ 4V 2.5V ~ 3.5V 2.5V ~ 3.6V 2.5V ~ 3.7V 2.5V ~ 35V 2.5V ~ 4V 2.5V ~ 5.5V 2.6V ~ 3.5V 2.7V ~ 4.95V 2.8V ~ 3.5V 2.8V ~ 5.5V 2V ~ 3.05V 2V ~ 3.5V 2V ~ 3.8V 2V ~ 4V 2V ~ 5.5V 3.2V 3.3V 3V 3V ~ 4.5V 4.1V Integrated	- 0.05µA @ 2.5V ~ 5.5V 0.06µA @ 2.5V ~ 5.5V 0.06µA @ 3V 0.08µA @ 3V 0.17µA ~ 0.22µA @ 1.8V ~ 3V 0.18µA @ 3V 0.24µA @ 3V 0.25µA @ 3V 0.25µA ~ 0.27µA @ 3V ~ 5V 0.25µA ~ 0.45µA @ 3V ~ 5V 0.29µA ~ 0.33µA @ 1.8V ~ 3V 0.32µA ~ 0.35µA @ 3V ~ 5V 0.33µA @ 3V 0.33µA ~ 0.38µA @ 2V ~ 5V 0.33µA ~ 0.39µA @ 1.6V ~ 3.6V 0.35µA @ 3V 0.35µA ~ 0.4µA @ 2V ~ 5V 0.3µA @ 1.3V ~ 1.8V 0.3µA ~ 0.4µA @ 1.1V ~ 5V 0.3µA ~ 1µA @ 2V ~ 5V 0.45µA @ 2.5V ~ 5.5V 0.45µA ~ 0.55µA @ 2V ~ 5V 0.49µA ~ 0.6µA @ 3V ~ 5V 0.4µA @ 1.6V ~ 5.5V 0.4µA @ 3V 0.4µA @ 5V 0.4µA ~ 0.95µA @ 1V ~ 4.4V 0.55µA ~ 0.6µA @ 3V ~ 5V 0.5mA @ 2.7V ~ 3.6V 0.5µA @ 1.5V 0.5µA @ 1.7V ~ 5.5V 0.5µA @ 2V ~ 5V 0.5µA @ 3V 0.5µA @ 4.5V ~ 5.5V 0.5µA @ 5V 0.5µA ~ 0.52µA @ 3V ~ 5V 0.5µA ~ 0.6µA @ 3V ~ 5V 0.5µA ~ 0.7µA @ 1.6V ~ 5.5V 0.5µA ~ 1µA @ 3V ~ 5V 0.63µA ~ 1.7µA 0.65µA @ 1.8V 0.65µA ~ 0.7µA @ 1.1V ~ 5.5V 0.65µA ~ 0.7µA @ 3V ~ 5V 0.65µA ~ 0.85µA @ 3V ~ 5V 0.65µA ~ 0.8µA @ 2V ~ 5V 0.6µA @ 1.3V ~ 1.8V 0.6µA @ 3.3V 0.6µA ~ 0.75µA @ 2V ~ 5V 0.6µA ~ 0.7µA @ 3V ~ 5V 0.6µA ~ 14µA @ 3V ~ 5V 0.7µA @ 1.7V ~ 3.6V 0.7µA ~ 0.8µA @ 2V ~ 5V 0.7µA ~ 0.8µA @ 3V ~ 5V 0.7µA ~ 0.95µA @ 1.3V ~ 4.4V 0.7µA ~ 0.95µA @ 3.6V ~ 4.4V 0.7µA ~ 0.9µA @ 3V ~ 5V 0.7µA ~ 2.2µA @ 2V ~ 5V 0.85µA ~ 0.9µA @ 3V ~ 5V 0.885µA @ 3.3V 0.8µA @ 1.2V ~ 1.8V 0.8µA @ 1.3V ~ 1.8V 0.8µA @ 2.4V ~ 5.5V 0.8µA @ 3V 0.8µA @ 5V 0.8µA ~ 1.2µA @ 3V ~ 5V 0.93µA ~ 1.1µA @ 3V ~ 5V 0.95µA ~ 1µA @ 3V ~ 5V 0.9µA @ 3V 0.9µA ~ 1.1µA @ 1.5V ~ 4.4V 0.9µA ~ 1.8µA @ 2V ~ 5V 0.9µA ~ 2µA @ 3V ~ 6V 1.05µA ~ 4.2µA @ 2V ~ 5V 1.1mA @ 3.3V 1.2µA (Typ) @ 3.3V 1.2µA @ 3.3V 1.2µA ~ 1.4µA @ 3V ~ 5V 1.2µA ~ 1.8µA @ 3V ~ 5V 1.2µA ~ 2µA @ 1.6V ~ 5.5V 1.2µA ~ 31µA @ 3V ~ 5.5V 1.2µA ~ 5µA @ 2V ~ 5V 1.3mA @ 5V 1.3µA @ 1.7V ~ 5.5V 1.4mA @ 2.7V ~ 3.6V 1.4mA @ 2.7V ~ 5.5V 1.4µA ~ 1.5µA @ 3V ~ 5V 1.5mA (Typ) @ 2.7 V ~ 3.6 V 1.5mA (Typ) @ 4.5 V ~ 5.5 V 1.5mA @ 4.5V ~ 5.5V 1.5µA @ 3.3V 1.5µA @ 3V 1.5µA @ 5V 1.5µA ~ 1.6µA @ 3V ~ 5V 1.5µA ~ 2.2µA @ 1.4V ~ 5V 1.5µA ~ 2µA @ 3V ~ 5.5V 1.5µA ~ 2µA @ 3V ~ 6V 1.6µA ~ 2µA @ 3V ~ 5V 1.8µA @ 2V ~ 5V 1.8µA @ 5V 1.8µA ~ 2µA @ 3V ~ 5V 1.8µA ~ 3µA @ 2V ~ 5V 100µA (Typ) @ 2.7V ~ 5.5V 100µA (Typ) @ 4.5V ~ 5.5V 100µA @ 1.71V ~ 1.89V 100µA @ 1.89V 100µA @ 2.2V 100µA @ 2.7V ~ 5.5V 100µA @ 200µA @ 1.89V ~ 5.5V 100µA @ 2V ~ 5.5V 100µA @ 3.3V 100µA @ 3V 10mA @ 5V 10µA @ 3V 10µA @ 5.5V 10µA @ 5V 10µA ~ 15µA @ 3V ~ 5V 10µA ~ 20µA @ 2.7V ~ 5.5V 10µA ~ 20µA @ 2.7V ~ 5V 10µA ~ 50µA @ 1V ~ 5V 110µA @ 3.63V 110µA ~ 170µA @ 3.63V ~ 5.5V 120µA ~ 1.8µA @ 3V ~ 5V 120µA ~ 160µA @ 3.3V ~ 5.5V 120µA ~ 160µA @ 3.63V ~ 5.5V 120µA ~ 200µA @ 1.89V ~ 5.5V 125µA @ 2.7V ~ 3.3V 125µA @ 2.7V ~ 5.5V 125µA @ 3.3V 125µA ~ 200µA @ 3.63V ~ 5.5V 125µA ~ 200µA @ 3V ~ 5.5V 130µA ~ 200µA @ 3.63V ~ 5.5V 14.3mA @ 3V ~ 3.6V 140µA @ 2.7V ~ 3.3V 14µA ~ 15µA @ 3V ~ 5V 14µA ~ 30µA @ 3V ~ 5V 150µA @ 1.5V ~ 5.5V 150µA @ 2.97V ~ 3.63V 150µA @ 3.3V 150µA @ 3.63V 150µA @ 3V ~ 3.6V 150µA @ 5.5V 15mA @ 4.5V ~ 5.5V 15µA @ 3V 15µA @ 5.5V 15µA @ 5V 175µA @ 2.3V ~ 4.5V 175µA @ 2.97V ~ 5.5V 180nA @ 3V 18µA @ 5.5V 1mA @ 3.3V 1mA @ 4.5V ~ 5.5V 1µA @ 1.8V ~ 3.6V 1µA @ 1.8V ~ 5.5V 1µA @ 3V 1µA @ 3V ~ 5V 1µA @ 5.5V 1µA @ 5V 1µA ~ 1.35µA @ 3V ~ 5.5V 1µA ~ 1.8µA @ 3V ~ 5V 1µA ~ 2µA @ 3V ~ 5V 1µA ~ 3µA @ 2V ~ 5V 2.1µA @ 3V 2.1µA ~ 3.4µA @ 3V ~ 5V 2.4µA ~ 31µA @ 2V ~ 5.5V 2.5mA @ 4.5V ~ 5.5V 2.5µA @ 3V 2.8µA ~ 3.4µA @ 3V ~ 5V 200µA @ 1.71V ~ 5.5V 200µA @ 3.3V 200µA @ 3.63V ~ 5.5V 200µA @ 5.5V 200µA @ 5V 20µA @ 5V 20µA ~ 500µA @ 5V 210nA @ 3V 220µA @ 3V ~ 3.6V 25.3µA ~ 81µA @ 2V ~ 5V 250µA @ 3V ~ 5.5V 270µA @ 4.5V ~ 5.5V 2mA @ 2.7V ~ 3.6V 2mA @ 2.7V ~ 3.7V 2mA @ 2.97V ~ 3.63V 2mA @ 3.3V 2mA @ 3V 2mA @ 3V ~ 3.6V 2mA @ 3V, 3mA @ 5V 2mA @ 4.5V ~ 5.5V 2mA @ 4.75V ~ 5.5V 2µA @ 3.3V 2µA @ 3.63V 2µA @ 3V 30.3µA @ 2V ~ 5V 300µA @ 5V 3mA @ 3V ~ 3.6V 3mA @ 4.5V ~ 5.5V 3mA @ 4.75V ~ 5.5V 3mA @ 4.7V ~ 5.5V 3mA @ 5V 3µA @ 3V 3µA @ 5V 3µA ~ 3.5µA @ 3V ~ 5.5V 4.6µA ~ 5.5µA @ 1.4V ~ 5V 4.9µA ~ 5.1µA @ 3V ~ 5V 4mA @ 3.3V 4mA @ 3V ~ 3.6V 4mA @ 4.5 V ~ 5.5 V 4mA @ 4.5V ~ 5.5V 4mA @ 5V 4µA @ 3V 4µA ~ 15µA @ 2V ~ 5V 4µA ~ 15µA @ 3V ~ 5.5V 4µA ~ 6µA @ 3V ~ 5V 4µA ~ 7µA @ 3V ~ 5V 5.5µA ~ 6.5µA @ 3V ~ 5V 500nA @ 3V 500µA @ 2.2V 500µA @ 3.3V 500µA @ 3.63V 500µA @ 5V 50µA @ 5V 50µA ~ 3mA @ 3V ~ 5V 5mA @ 4.5V ~ 5.5V 5mA @ 5V 5mA ~ 10mA @ 3V ~ 5V 5µA @ 3.63V ~ 5.5V 5µA ~ 10µA @ 2V ~ 5V 5µA ~ 7.8µA @ 1.2V ~ 5.5V 65µA @ 3.3V 6mA @ 2.2 V ~ 5.8 V 6mA @ 5V 700nA ~ 900nA @ 3V ~ 5V 70µA @ 1.5V ~ 5.5V 70µA @ 2.7V ~ 5.5V 70µA @ 2V ~ 5.5V 750nA ~ 800nA @ 1.8V ~ 4.2V 770nA ~ 2.135µA @ 1.2V ~ 5.5V 7mA @ 3.3V 7mA @ 5V 7µA @ 5V 8µA ~ 14µA @ 3V ~ 5V 8µA ~ 15µA @ 2V ~ 5V 950nA ~ 1µA @ 3V ~ 5V	- -10°C ~ 70°C -20°C ~ 70°C -25°C ~ 70°C -30°C ~ 70°C -30°C ~ 80°C -40°C ~ 105°C -40°C ~ 105°C (TA) -40°C ~ 125°C -40°C ~ 125°C (TA) -40°C ~ 85°C -40°C ~ 85°C (TA) 0°C ~ 70°C 0°C ~ 70°C (TA)	- Surface Mount Surface Mount, Wettable Flank Through Hole	- Automotive	- AEC-Q100 AEC-Q200	- 10-DFN (2.6x2.6) 10-HVSON (3x3) 10-LGA (5x5) 10-MSOP 10-SMD 10-SON (3.7x2.5) 10-SON (5x3.2) 10-SSOP 10-SSOP-G 10-TDFN (3x3) 10-TSSOP 10-TSSOPG 10-uMAX 10-uMAX/uSOP 12-HVSON (3x3) 12-UFBGA, WLBGA 12-VSOJ 12-WLCSP (1.19x0.94) 12-WLP (1.47x1.97) 12-WLP (1.63x1.23) 12-WLP (2.14x1.56) 14-EDIP 14-SOIC 14-SOP 14-TDFN (3x3) 14-TDFN-EP (3x3) 14-TSSOP 16-DFN (5x4) 16-HLSON (4.5x3.5) 16-HVQFN (3x3) 16-MLPQ (3x3) 16-PDIP 16-QFN (3x3) 16-QFN (4x4) 16-SO 16-SOIC 16-SSOP 168-BGA (40x40) 168-PBGA Module (42.3x42.3) 18-DIP 18-QFN (2x2) 18-SOP 18-SOX 20-DFN (5.5x4) 20-HVQFN (5x5) 20-QSOP 20-SO 20-SOIC 20-SSOP 20-TSSOP 20-VSOJ 22-SON 22-SON (6.1x4.7) 22-SON (6.3x4.8) 24-CERDIP 24-DIP 24-DIP Module 24-EDIP 24-PCDIP, CAPHAT® 24-PDIP 24-SOIC 24-SOP 24-SSOP 24-SSOP/QSOP 24-TSSOP 28-DIP Module 28-DIP Module (18.42x37.72) 28-EDIP 28-PCDIP, CAPHAT® 28-PDIP 28-PLCC (11.51x11.51) 28-SO 28-SOH 28-SOIC 28-SOP 28-TSOP 28-TSSOP 32-DIP Module (18.42x42.8) 32-DIP Module (18.42x52.96) 32-EDIP 32-PMDIP 32-PMDIP Module 32-TQFP (7x7) 32-TSOP 34-LPM 34-PowerCap Module 36-DIP Module 36-DIP Module (18.42x52.96) 44-MQFP (10x10) 44-SOH 48-LQFP (7x7) 48-PBGA (11.8x15.3) 6-FlipChip (1.09x1.37) 6-FlipChip (2.82x2.54) 6-TDFN (3x3) 6-TDFN-EP (3x3) 6-TSOC 8-CLCC (3.2x1.5) 8-DIP 8-EMP 8-HSOP-E 8-HVSON (4x4) 8-HWSON (2x3) 8-LCC (1.5x3.2) 8-MSOP 8-PDIP 8-SO 8-SOIC 8-SON (2x1.2) 8-SON (3.2x1.5) 8-SOP 8-SOP-J 8-SSOP 8-TDFN (2x2) 8-TDFN (2x3) 8-TDFN (3x3) 8-TDFN EP 8-TDFN-EP (3x3) 8-TSSOP 8-TSSOP-B 8-uMAX/uSOP 8-UTDFN (2x2) 8-WLCSP 8-WLP (.97x1.97) 8-WLP (2.07x2.27) 8-µTDFN (2x2) 80-BGA (40x40) Die Module QFN018018-12 QFN023023-16 SMD SNT-8A VSON008X2030

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Real Time Clock (RTC) ICs are timing components used to maintain accurate time and calendar information in electronic systems, even when the main power is turned off. They are widely used in embedded systems, industrial control, consumer electronics, communication equipment, medical devices, automotive electronics, IoT products, meters and data logging applications.

This category includes real time clock ICs, battery-backed RTCs, low-power RTCs, I2C RTCs, SPI RTCs, calendar clock ICs and related clock/timing components. These devices are commonly selected based on timekeeping accuracy, backup power support, interface type, alarm functions, operating voltage, current consumption, package type and application requirements.

TomatoElec supplies original Real Time Clock RTC ICs from recognized semiconductor manufacturers such as Microchip, NXP, STMicroelectronics, Renesas, Texas Instruments, Analog Devices, onsemi, Infineon and other major brands. As an in-stock electronic components supplier and independent distributor, TomatoElec provides inventory support, original component sourcing and BOM sourcing services for global customers.

Mfr. Part #	Price	Quantity	Datasheet	Series	Package/Case	Packaging	Product Status	Programmable	Type	Features	Memory Size	Time Format	Date Format	Interface	Voltage - Supply	Voltage - Supply, Battery	Current - Timekeeping (Max)	Operating Temperature	Mounting Type	Grade	Qualification	Supplier Device Package
RX-4581NB:B ROHS IC RTC CLK/CALENDAR SPI 22SON EPSON	-	RFQ	Datasheet	RX-4581NB	22-SMD, 20 Leads, Flat Leads	Bulk	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, SRAM	16B	HH:MM:SS (24 hr)	YY-MM-DD-dd	SPI	1.6V ~ 5.5V	-	0.8µA ~ 1.2µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	-	-	22-SON
ISL12032IVZ-T IC RTC EVENT REC I2C 14TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Time Event Recorder	Alarm, SRAM, Trickle-Charger	128B	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	18µA @ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	14-TSSOP
BQ3285P-SB2E3 IC RTC CLK/CALENDAR PAR 24DIP Texas Instruments	-	RFQ	Datasheet	-	24-DIP (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 4V	-	0°C ~ 70°C	Through Hole	-	-	24-PDIP
BQ4285S-SB2G4 IC RTC CLK/CALENDAR PAR 24SOIC Texas Instruments	-	RFQ	Datasheet	-	24-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 4V	-	0°C ~ 70°C	Surface Mount	-	-	24-SOIC
BQ4845S-A4G4 IC RTC CLK/CALENDAR PAR 28SOIC Texas Instruments	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	2.3V ~ 4V	1.5mA (Typ) @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Surface Mount	-	-	28-SOIC
BQ4845S-A4NG4 IC RTC CLK/CALENDAR PAR 28SOIC Texas Instruments	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	2.3V ~ 4V	1.5mA (Typ) @ 4.5 V ~ 5.5 V	-40°C ~ 85°C	Surface Mount	-	-	28-SOIC
BQ4845YS-A4G4 IC RTC CLK/CALENDAR PAR 28SOIC Texas Instruments	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.3V ~ 4V	1.5mA (Typ) @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Surface Mount	-	-	28-SOIC
PCA2125TS/1,112 IC RTC CLK/CALENDAR SPI 14TSSOP NXP USA Inc.	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	1.6V ~ 5.5V	-	1.8µA @ 2V ~ 5V	-40°C ~ 125°C	Surface Mount	-	-	14-TSSOP
PCA2125TS/1,118 IC RTC CLK/CALENDAR SPI 14TSSOP NXP USA Inc.	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	1.6V ~ 5.5V	-	1.8µA @ 2V ~ 5V	-40°C ~ 125°C	Surface Mount	-	-	14-TSSOP
X1288V14Z IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	14-TSSOP
X1288V14Z-2.7 IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	14-TSSOP
X1288V14Z-4.5A IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	14-TSSOP
ISL1208IB8ZR5291 IC RTC CLK/CALENDAR I2C 8SOIC Renesas Electronics Corporation	-	RFQ	Datasheet	-	8-SOIC (0.154", 3.90mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, SRAM	2B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	4µA ~ 6µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	-	-	8-SOIC
CDP68HC68T1MZ IC RTC CLK/CALENDAR SPI 20SOIC Renesas Electronics Corporation	-	RFQ	Datasheet	-	20-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	32B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	3V ~ 6V	2.2V ~ 6V	20µA ~ 500µA @ 5V	-40°C ~ 85°C	Surface Mount	-	-	20-SOIC
ISL12025IVZ IC RTC CLK/CALENDAR I2C 8TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	8-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Unique ID, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	8-TSSOP
ISL12021CVZ IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, SRAM	128B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	5.5µA ~ 6.5µA @ 3V ~ 5V	-20°C ~ 70°C	Surface Mount	-	-	14-TSSOP
ISL12028IV27AZ IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	14-TSSOP
ISL12028IV30AZ IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	14-TSSOP
ISL12023IVZ IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, SRAM	128B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	14µA ~ 15µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	-	-	14-TSSOP
ISL12027IVAZ IC RTC CLK/CALENDAR I2C 8TSSOP Renesas Electronics Corporation	-	RFQ	Datasheet	-	8-TSSOP (0.173", 4.40mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	8-TSSOP

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