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
DS1688S

DS1688S

IC RTC CLK/CALENDAR PAR 28SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1688S

Datasheet

- 28-SOIC (0.337", 8.56mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Unique ID 114B HH:MM:SS (12/24 hr) YY-MM-DD Parallel 2.7V ~ 3.3V, 4.5V ~ 5.5V - - 0°C ~ 70°C Surface Mount - - 28-SOIC
PT7C4337ACSE

PT7C4337ACSE

IC RTC CLK/CALENDAR I2C 16SOIC

Diodes Incorporated

120 -
RFQ
PT7C4337ACSE

Datasheet

- 16-SOIC (0.295", 7.50mm Width) 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 - 0.8µA @ 1.3V ~ 1.8V -40°C ~ 85°C Surface Mount - - 16-SOIC
DS17485-5

DS17485-5

IC RTC CLK/CALENDAR PAR 24DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS17485-5

Datasheet

- 24-DIP (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 4KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Through Hole - - 24-PDIP
DS1284+

DS1284+

IC RTC CLK/CALENDAR PAR 28DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1284+

Datasheet

- 28-DIP (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer 50B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.4V ~ 3.5V 7mA @ 5V 0°C ~ 70°C Through Hole - - 28-PDIP
DS1315N-33

DS1315N-33

IC RTC PHANTOM CHIP PAR 16DIP

Analog Devices Inc./Maxim Integrated

1,467 -
RFQ
DS1315N-33

Datasheet

- 16-DIP (0.300", 7.62mm) Tube Obsolete Not Verified Phantom Time Chip Leap Year - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 3V ~ 3.6V 2.5V ~ 3.7V 1.1mA @ 3.3V -40°C ~ 85°C Through Hole - - 16-PDIP
DS17485E-3+

DS17485E-3+

IC RTC CLK/CALENDAR PAR 28TSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS17485E-3+

Datasheet

- 28-TSSOP (0.465", 11.80mm Width) Tray Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 4KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.7V 2.5V ~ 3.7V 2mA @ 2.7V ~ 3.7V 0°C ~ 70°C Surface Mount - - 28-TSOP
DS1500YE+

DS1500YE+

IC RTC CLK/CALENDAR PAR 32TSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1500YE+

Datasheet

- 32-LFSOP (0.724", 18.40mm Width) Tray Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K 256B HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 5mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 32-TSOP
LV8572AN

LV8572AN

REAL TIME CLOCK, 0 TIMER(S)

National Semiconductor

1,065 -
RFQ
LV8572AN

Datasheet

- 24-DIP (0.300", 7.62mm) Bulk Active Not Verified Clock/Calendar Alarm 44B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 3V ~ 3.6V 2.2V ~ 3.2V 3mA @ 3V ~ 3.6V -40°C ~ 85°C (TA) Through Hole - - 24-DIP
DS17885E-5

DS17885E-5

IC RTC CLK/CALENDAR PAR 28TSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS17885E-5

Datasheet

- 28-TSSOP (0.465", 11.80mm Width) Bag Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 8KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 28-TSOP
DS17885S-5

DS17885S-5

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS17885S-5

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 8KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 24-SOIC
CDP68HC68T1M

CDP68HC68T1M

IC RTC CLK/CALENDAR SPI 20SOIC

Intersil

553 -
RFQ
CDP68HC68T1M

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
CDP68HC68T1M

CDP68HC68T1M

IC RTC CLK/CALENDAR SPI 20SOIC

Harris Corporation

165 -
RFQ
CDP68HC68T1M

Datasheet

- 20-SOIC (0.295", 7.50mm Width) Bulk Active 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
BQ4802YDW

BQ4802YDW

IC RTC CLK/CALENDAR PAR 28SOIC

Texas Instruments

0 -
RFQ
BQ4802YDW

Datasheet

- 28-SOIC (0.295", 7.50mm Width) Bulk Active 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 2.4V ~ 4V 1.5mA (Typ) @ 4.5 V ~ 5.5 V 0°C ~ 70°C Surface Mount - - 28-SOIC
DS1691

DS1691

IC RTC CLK/CALENDAR PAR 28EDIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1691

Datasheet

- 28-DIP Module (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Unique ID 114B HH:MM:SS (12/24 hr) YY-MM-DD Parallel 2.7V ~ 3.3V, 4.5V ~ 5.5V - - 0°C ~ 70°C Through Hole - - 28-EDIP
DS17885E-5+

DS17885E-5+

IC RTC CLK/CALENDAR PAR 28TSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS17885E-5+

Datasheet

- 28-TSSOP (0.465", 11.80mm Width) Bulk Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 8KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 28-TSOP
DS1743WP-150

DS1743WP-150

IC RTC CLK/CALENDAR PAR 34PCM

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1743WP-150

Datasheet

- 34-PowerCap™ Module Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Y2K 8KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V 3V 2mA @ 3.3V 0°C ~ 70°C Surface Mount - - 34-PowerCap Module
CDP68HC68T1E

CDP68HC68T1E

IC RTC CLK/CALENDAR SPI 16DIP

Intersil

10,296 -
RFQ
CDP68HC68T1E

Datasheet

- 16-DIP (0.300", 7.62mm) 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 Through Hole - - 16-PDIP
DS12R887-5

DS12R887-5

IC RTC CLK/CALENDAR PAR 48BGA

Analog Devices Inc./Maxim Integrated

0 -
RFQ

-

- 48-BBGA Tray Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger 114B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2V ~ 3.05V 2mA @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 48-PBGA (11.8x15.3)
DS1315N-33+

DS1315N-33+

IC RTC PHANTOM PAR 16-DIP

Analog Devices Inc./Maxim Integrated

172 -
RFQ
DS1315N-33+

Datasheet

* - Bulk Obsolete Not Verified - - - - - - - - - - - - - -
LV8571AN

LV8571AN

RTC, VOLATILE, 2 TIMER(S)

National Semiconductor

5,515 -
RFQ
LV8571AN

Datasheet

LV8571A 24-DIP (0.300", 7.62mm) Bulk Active Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, RAM 44B HH:MM:SS (12/24 hr) YY-MM-DD - 3V ~ 3.6V 2.2V ~ 3.2V 220µA @ 3V ~ 3.6V -40°C ~ 85°C (TA) Through Hole - - 24-DIP
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