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+T&R

DS1343D-18+T&R

IC RTC CLK/CALENDAR SPI 14TDFN

Analog Devices Inc./Maxim Integrated

2,200 -
RFQ
DS1343D-18+T&R

Datasheet

- 14-WFDFN Exposed Pad Tape & Reel (TR) 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)
DS1673E-3

DS1673E-3

IC RTC SYST CTRLR SER 20TSSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1673E-3

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Portable System Controller Alarm, Leap Year, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2.7V ~ 3.3V 2.5V ~ 3.7V 100µA @ 3V 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1673E-5

DS1673E-5

IC RTC SYST CTRLR SER 20TSSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1673E-5

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Portable System Controller Alarm, Leap Year, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 4.5V ~ 5.5V 2.5V ~ 3.7V 300µA @ 5V 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1677E

DS1677E

IC RTC SYST CTRLR SER 20TSSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1677E

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Portable System Controller Alarm, Leap Year, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 4.5V ~ 5.5V 2.5V ~ 3.7V 300µA @ 5V 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1673S-3

DS1673S-3

IC RTC SYST CTRLR SER 20SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1673S-3

Datasheet

- 20-SOIC (0.295", 7.50mm Width) Tube Obsolete Not Verified Portable System Controller Alarm, Leap Year, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2.7V ~ 3.3V 2.5V ~ 3.7V 100µA @ 3V 0°C ~ 70°C Surface Mount - - 20-SOIC
DS1501W+

DS1501W+

IC RTC CLK/CALENDAR PAR 28DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1501W+

Datasheet

- 28-DIP (0.600", 15.24mm) Bulk 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 3V ~ 3.6V 2.5V ~ 3.7V 4mA @ 3V ~ 3.6V 0°C ~ 70°C Through Hole - - 28-PDIP
DS1343E-18+T&R

DS1343E-18+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

2,336 -
RFQ
DS1343E-18+T&R

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) 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 - - 20-TSSOP
BQ4802YDSH

BQ4802YDSH

IC RTC CLK/CALENDAR PAR 28SOP

Texas Instruments

0 -
RFQ
BQ4802YDSH

Datasheet

- 28-SOIC (0.345", 8.77mm Width) with SNAPHAT Sockets 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 2.4V ~ 4V 1.5mA (Typ) @ 4.5 V ~ 5.5 V 0°C ~ 70°C Surface Mount - - 28-SOP
UPD4991AGS-A

UPD4991AGS-A

RTC, VOLATILE, 1 TIMER(S) PDSO

Renesas Electronics Corporation

9,671 -
RFQ
UPD4991AGS-A

Datasheet

* - Bulk Active Not Verified - - - - - - - - - - - - - -
ISL12024IBZ-T

ISL12024IBZ-T

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

1,455 -
RFQ
ISL12024IBZ-T

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Unique ID - 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-SOIC
DS1501WN+

DS1501WN+

IC RTC CLK/CALENDAR PAR 28DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1501WN+

Datasheet

- 28-DIP (0.600", 15.24mm) Bulk 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 3V ~ 3.6V 2.5V ~ 3.7V 4mA @ 3V ~ 3.6V -40°C ~ 85°C Through Hole - - 28-PDIP
DS12885T

DS12885T

IC RTC CLK/CALENDAR PAR 32TQFP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS12885T

Datasheet

- 32-TQFP Tray 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 15mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 32-TQFP (7x7)
DS17485S-5/T&R/C01

DS17485S-5/T&R/C01

DS17485 REAL-TIME CLOCK

Analog Devices Inc./Maxim Integrated

12,000 -
RFQ
DS17485S-5/T&R/C01

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Bulk Active - Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 4KB HH:MM:SS (12/24 hr) YY-MM-DD Parallel 2.7V ~ 3.7V, 4.5V ~ 5.5V 2.5V ~ 3.7V 2mA @ 2.7V ~ 3.7V 0°C ~ 70°C (TA) Surface Mount - - 24-SOIC
DS1344D-18+T&R

DS1344D-18+T&R

IC RTC CLK/CALENDAR SPI 14TDFN

Analog Devices Inc./Maxim Integrated

608 -
RFQ
DS1344D-18+T&R

Datasheet

- 14-WFDFN Exposed Pad Tape & Reel (TR) 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)
DS1501YE

DS1501YE

IC RTC CLK/CALENDAR PAR 28TSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1501YE

Datasheet

- 28-TSSOP (0.465", 11.80mm Width) Bag 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 - - 28-TSOP
M41T315V-85MH6F

M41T315V-85MH6F

IC RTC PHANTOM CHIP SER 28SOH

STMicroelectronics

175 -
RFQ
M41T315V-85MH6F

Datasheet

- 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tape & Reel (TR) Obsolete Not Verified Phantom Time Chip Leap Year, Supervisor - HH:MM:SS (12/24 hr) YY-MM-DD-dd Serial 3V ~ 3.6V 2.5V ~ 3.7V 2mA @ 2.7V ~ 3.6V -40°C ~ 85°C Surface Mount - - 28-SOH
DS1501YE+

DS1501YE+

IC RTC CLK/CALENDAR PAR 28TSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1501YE+

Datasheet

- 28-TSSOP (0.465", 11.80mm Width) Bulk 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 - - 28-TSOP
DS1688

DS1688

IC RTC CLK/CALENDAR PAR 28DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1688

Datasheet

- 28-DIP (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-PDIP
DS1689

DS1689

IC RTC CLK/CALENDAR PAR 28DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1689

Datasheet

- 28-DIP (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar NVSRAM 114B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.3V, 4.5V ~ 5.5V 2.5V ~ 3.7V 2mA @ 3V, 3mA @ 5V 0°C ~ 70°C Through Hole - - 28-PDIP
DS17285E-5

DS17285E-5

IC RTC CLK/CALENDAR PAR 28TSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS17285E-5

Datasheet

- 28-TSSOP (0.465", 11.80mm Width) Bag Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 2KB 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
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