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

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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.

Photo Mfr. Part # Availability 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
M41T82SM6E

M41T82SM6E

IC RTC CLK/CALENDAR I2C 8SOIC

STMicroelectronics

0 -
RFQ
M41T82SM6E

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM, Watchdog Timer 7B HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 3V ~ 5.5V 2V ~ 5.5V 10µA @ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
1338-31DVGI8

1338-31DVGI8

IC RTC CLK/CALENDAR I2C 8MSOP

Renesas Electronics Corporation

0 -
RFQ
1338-31DVGI8

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 3.3V ~ 5.5V 1.3V ~ 3.7V 5µA @ 3.63V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-MSOP
1338C-18SRI8

1338C-18SRI8

IC RTC CLK/CALENDAR I2C 16SOIC

Renesas Electronics Corporation

0 -
RFQ
1338C-18SRI8

Datasheet

- 16-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 3.3V ~ 5.5V 1.3V ~ 3.7V 2µA @ 3.3V -40°C ~ 85°C Surface Mount - - 16-SOIC
MCP795W11T-I/ST

MCP795W11T-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

0 -
RFQ
MCP795W11T-I/ST

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer 64B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.8V ~ 3.6V 1.3V ~ 3.6V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
MCP795W12T-I/ST

MCP795W12T-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

0 -
RFQ
MCP795W12T-I/ST

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer 64B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.8V ~ 3.6V 1.3V ~ 3.6V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
MCP795W20T-I/ST

MCP795W20T-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

0 -
RFQ
MCP795W20T-I/ST

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Watchdog Timer 64B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.8V ~ 3.6V 1.3V ~ 3.6V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
DS1393U-18+T&R

DS1393U-18+T&R

IC RTC CLK/CALENDAR SER 10UMAX

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1393U-18+T&R

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd 3-Wire Serial 1.71V ~ 1.89V 1.3V ~ 3.7V 100µA @ 1.71V ~ 1.89V -40°C ~ 85°C Surface Mount - - 10-uMAX/uSOP
V3020TP8A+

V3020TP8A+

IC RTC CLK/CALENDAR SER 8TSSOP

EM Microelectronic

0 -
RFQ
V3020TP8A+

Datasheet

- 8-TSSOP (0.173", 4.40mm Width) Tube Last Time Buy Not Verified Clock/Calendar Alarm, Leap Year, RAM 1B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd 3-Wire Serial 1.2V ~ 5.5V - 0.8µA @ 5V -40°C ~ 85°C (TA) Surface Mount - - 8-TSSOP
RTC-4543SA:B0 ROHS

RTC-4543SA:B0 ROHS

IC RTC CLK/CALENDAR SER 14SOP

EPSON

0 -
RFQ
RTC-4543SA:B0 ROHS

Datasheet

RTC-4543SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd 3-Wire Serial 2.5V ~ 5.5V - 1µA ~ 3µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
1338B-18DVGI8

1338B-18DVGI8

1338B-18 REAL TIME CLOCK

Renesas Electronics Corporation

0 -
RFQ
1338B-18DVGI8

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active - Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C 1.4V ~ 5.5V 1.3V ~ 3.7V 2µA @ 3.3V -40°C ~ 85°C (TA) Surface Mount - - 8-TSSOP
DS1307Z

DS1307Z

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1307Z

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2V ~ 3.5V 200µA @ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
DS1307ZN/T&R

DS1307ZN/T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1307ZN/T&R

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2V ~ 3.5V 200µA @ 5V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1302ZN/T&R

DS1302ZN/T&R

IC RTC CLK/CALENDAR SER 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1302ZN/T&R

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Trickle-Charger 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2V ~ 5.5V 2V ~ 5.5V 0.3µA ~ 1µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 8-SOIC
MCP795W21T-I/SL

MCP795W21T-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

0 -
RFQ
MCP795W21T-I/SL

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer 64B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.8V ~ 3.6V 1.3V ~ 3.6V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
MCP795W22T-I/SL

MCP795W22T-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

0 -
RFQ
MCP795W22T-I/SL

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer 64B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.8V ~ 3.6V 1.3V ~ 3.6V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
MCP795B10-I/ST

MCP795B10-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

0 -
RFQ
MCP795B10-I/ST

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer 64B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.8V ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
EM3029V02SM10B+

EM3029V02SM10B+

LINEAR IC

EM Microelectronic

0 -
RFQ

-

- - Tape & Reel (TR) Active - - - - - - - - - - - - - - -
DS1302

DS1302

IC RTC CLK/CALENDAR SER 8DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1302

Datasheet

- 8-DIP (0.300", 7.62mm) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Trickle-Charger 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2V ~ 5.5V 2V ~ 5.5V 0.3µA ~ 1µA @ 2V ~ 5V 0°C ~ 70°C Through Hole - - 8-PDIP
DS1302Z

DS1302Z

IC RTC CLK/CALENDAR SER 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1302Z

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Trickle-Charger 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2V ~ 5.5V 2V ~ 5.5V 0.3µA ~ 1µA @ 2V ~ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
DS1302S

DS1302S

IC RTC CLK/CALENDAR SER 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1302S

Datasheet

- 8-SOIC (0.209", 5.30mm Width) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Trickle-Charger 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2V ~ 5.5V 2V ~ 5.5V 0.3µA ~ 1µA @ 2V ~ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
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