RX4111CE & RX8111CE Real-Time Clock Modules

Epson RX4111CE and RX8111CE Real-Time Clock (RTC) Modules come with a built-in frequency adjusted 32.768kHz crystal unit and battery switch-over function. The RTC modules offer a time-stamp function that logs and stores the real-time and wake-up function to wake up MCU/SoC. These modules feature a 100nA typical low backup current, an auto power switching function, and auto-repeat wakeup timer interruption. The RX4111CE RTC module is designed with an SPI-bus 4-wire interface, whereas the RX8111CE RTC module is designed with an I2C-bus interface with fast-mode 400kHz.

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Description Datasheet Availability Pricing (IDR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model RTC Bus Interface
Date Format
Time Format
Battery Backup Switching
Supply Voltage - Min
Supply Voltage - Max
Minimum Operating Temperature
Maximum Operating Temperature
Series
Mounting Style
Packaging
Epson Timing Real Time Clock RX4111CE:B3 REAL TIME CLOCK SPI-BUS 3.0V 23PPM 250TR
Datasheet
152In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 4-Wire, SPI Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX4111CE SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock RX8111CE:A3 REAL TIME CLOCK I2C-BUS 3.0V 11.5PPM 250TR
Datasheet
299In Stock
500Expected 06/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX8111CE SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock RX8111CE:B3 REAL TIME CLOCK I2C-BUS 3.0V 23PPM 250TR
Datasheet
363In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX8111CE SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock RX4111CE:A3 REAL TIME CLOCK SPI-BUS 3.0V 11.5PPM 250TR
Datasheet
4.091On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 4-Wire, SPI Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX4111CE SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock RX4111CE:AB REAL TIME CLOCK SPI-BUS 3.0V 11.5PPM BULK
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
RX4111CE Bulk
Epson Timing Real Time Clock RX4111CE:BB REAL TIME CLOCK SPI-BUS 3.0V 23PPM BULK
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
RX4111CE Bulk
Epson Timing Real Time Clock RX8111CE:AB REAL TIME CLOCK I2C-BUS 3.0V 11.5PPM BULK
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
RX8111CE Bulk
Epson Timing Real Time Clock RX8111CE:BB REAL TIME CLOCK I2C-BUS 3.0V 23PPM BULK
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
RX8111CE Bulk