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
DS1343D-18+

DS1343D-18+

IC RTC CLK/CALENDAR SPI 14TDFN

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1343D-18+

Datasheet

- 14-WFDFN Exposed Pad Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 1.71V ~ 5.5V 1.3V ~ 5.5V - -40°C ~ 85°C Surface Mount - - 14-TDFN (3x3)
DS1347T+

DS1347T+

IC RTC CLK/CALENDAR SPI 8TDFN

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1347T+

Datasheet

- 8-WDFN Exposed Pad Tube Active Not Verified Clock/Calendar Alarm, Leap Year, SRAM - HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V - 0.7µA ~ 0.8µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 8-TDFN (3x3)
AS1801-BTDT

AS1801-BTDT

ULTRA-LOW POWER, IC SERIAL REAL-

Austria Micro

0 -
RFQ
AS1801-BTDT

Datasheet

- 8-UFDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 3.6V 0.9V ~ 3.6V 0.5µA @ 1.5V -40°C ~ 85°C Surface Mount - - 8-TDFN (2x2)
PCF2123U/12AA/1,00

PCF2123U/12AA/1,00

IC RTC/CALENDAR SPI UNCASED

NXP USA Inc.

0 -
RFQ
PCF2123U/12AA/1,00

Datasheet

* - Bulk Obsolete Not Verified - - - - - - - - - - - - - -
PCF2123U/5GA/1,015

PCF2123U/5GA/1,015

IC RTC/CALENDAR SPI UNCASED

NXP USA Inc.

0 -
RFQ
PCF2123U/5GA/1,015

Datasheet

* - Bulk Obsolete Not Verified - - - - - - - - - - - - - -
PCF8523U/12AA/1,00

PCF8523U/12AA/1,00

IC RTC/CALENDAR UNCASED DIE FFC

NXP USA Inc.

0 -
RFQ
PCF8523U/12AA/1,00

Datasheet

* - Bulk Obsolete Not Verified - - - - - - - - - - - - - -
PCF8564AU/5BD/1,01

PCF8564AU/5BD/1,01

IC RTC/CALENDAR UNCASED DIE

NXP USA Inc.

0 -
RFQ
PCF8564AU/5BD/1,01

Datasheet

* - Bulk Obsolete Not Verified - - - - - - - - - - - - - -
DS1339AD+T

DS1339AD+T

IC RTC CLOCK/CALENDAR I2C 8TDFN

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1339AD+T

Datasheet

- - Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.71V ~ 5.5V 1.3V ~ 3.7V 200µA @ 1.71V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-TDFN EP
DS1341T+

DS1341T+

IC RTC CLK/CALENDAR I2C 8TDFN

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1341T+

Datasheet

- 8-WDFN Exposed Pad Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.5µA ~ 0.6µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 8-TDFN (3x3)
PCA8802CX8/B/1,027

PCA8802CX8/B/1,027

IC RTC BINARY COUNTER I2C DIE

NXP USA Inc.

0 -
RFQ
PCA8802CX8/B/1,027

Datasheet

- Die Tape & Reel (TR) Obsolete Not Verified Binary Counter Square Wave Output, Unique ID - Binary Binary I2C, 2-Wire Serial 1.6V ~ 5.5V - 0.4µA @ 1.6V ~ 5.5V -40°C ~ 85°C - - - Die
DP8573AVX

DP8573AVX

IC RTC CLK/CALENDAR PAR 28PLCC

Texas Instruments

0 -
RFQ
DP8573AVX

Datasheet

- 28-LCC (J-Lead) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.2V ~ 5.1V 1µA @ 5V -40°C ~ 85°C Surface Mount - - 28-PLCC (11.51x11.51)
DS1254WB2-150

DS1254WB2-150

IC RTC PHANTOM CHIP PAR 80BGA

Analog Devices Inc./Maxim Integrated

0 -
RFQ

-

- 80-BBGA Tray Obsolete Not Verified Phantom Time Chip Leap Year, NVSRAM 2MB HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 3V ~ 3.7V 3V 7mA @ 3.3V 0°C ~ 70°C Surface Mount - - 80-BGA (40x40)
DS1318

DS1318

IC RTC ELAPSED CNT PAR 24TSSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ

-

- 24-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Elapsed Time Counter Alarm, Square Wave Output - Binary Binary Parallel 3V ~ 3.6V 1.6V ~ 3.7V 150µA @ 3V ~ 3.6V -40°C ~ 85°C Surface Mount - - 24-TSSOP
DS1371U

DS1371U

IC RTC BINARY COUNTER I2C 8UMAX

Analog Devices Inc./Maxim Integrated

0 -
RFQ

-

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Obsolete Not Verified Binary Counter Alarm, Square Wave Output, Watchdog Timer - Binary Binary I2C, 2-Wire Serial 1.7V ~ 5.5V - 1.3µA @ 1.7V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
DS1374U-33

DS1374U-33

IC RTC BINARY COUNTER I2C 10UMAX

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1374U-33

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tube Obsolete Not Verified Binary Counter Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer - Binary Binary I2C, 2-Wire Serial 2.97V ~ 5.5V 1.3V ~ 5.5V 175µA @ 2.97V ~ 5.5V -40°C ~ 85°C Surface Mount - - 10-uMAX/uSOP
DS1391U-33

DS1391U-33

IC RTC CLK/CALENDAR SPI 10UMAX

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1391U-33

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 2.97V ~ 5.5V 1.3V ~ 5.5V 175µA @ 2.97V ~ 5.5V -40°C ~ 85°C Surface Mount - - 10-uMAX/uSOP
PCA8802U/2AA/1,026

PCA8802U/2AA/1,026

IC RTC BINARY COUNTER I2C DIE

NXP USA Inc.

0 -
RFQ

-

- Die Tray Obsolete Not Verified Binary Counter Square Wave Output, Unique ID - Binary Binary I2C, 2-Wire Serial 1.6V ~ 5.5V - 0.4µA @ 1.6V ~ 5.5V -40°C ~ 85°C - - - Die
PCA8802UG/12KB/1,0

PCA8802UG/12KB/1,0

IC RTC BINARY COUNTER I2C 8WLCSP

NXP USA Inc.

0 -
RFQ

-

- 8-XFBGA, WLCSP Bulk Obsolete Not Verified Binary Counter Square Wave Output, Unique ID - Binary Binary I2C, 2-Wire Serial 1.6V ~ 5.5V - 0.4µA @ 1.6V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-WLCSP
PCF8564AU/5GC/1,01

PCF8564AU/5GC/1,01

IC RTC CLOCK/CALENDAR I2C DIE

NXP USA Inc.

0 -
RFQ
PCF8564AU/5GC/1,01

Datasheet

- Die Bulk Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 5.5V - 0.6µA ~ 0.75µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - Die
1337GDCGI8

1337GDCGI8

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

0 -
RFQ
1337GDCGI8

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.6µA @ 1.3V ~ 1.8V -40°C ~ 85°C Surface Mount - - 8-SOIC
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