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Real Time Clocks

Compare the current Real Time Clocks Clock/Timing selection by manufacturer, stock status, datasheet and technical parameters. Use these details to narrow the list to parts that match your design, maintenance or purchasing requirements.

For a specific MPN, package, electrical rating or quantity requirement, send the details to EGOO. We can help confirm availability, quotation and alternative sourcing options.

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
RS5C348A-E2-F Nisshinbo Micro Devices Inc.

RS5C348A-E2-F

IC RTC CLK/CALENDAR SER 10SSOP

Nisshinbo Micro Devices Inc.

24,547 -
Datasheet - 10-LFSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 4-Wire Serial 2V ~ 5.5V - 1µA @ 3V -40°C ~ 85°C Surface Mount - - 10-SSOP
R2025S-E2-FE Nisshinbo Micro Devices Inc.

R2025S-E2-FE

IC RTC CLK/CALENDAR I2C 14SOP

Nisshinbo Micro Devices Inc.

6,632 -
Datasheet - 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.7V ~ 5.5V - 120µA ~ 1.8µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
R2043T-E2-F Nisshinbo Micro Devices Inc.

R2043T-E2-F

IC RTC CLK/CALENDAR SER 10TSSOP

Nisshinbo Micro Devices Inc.

7,039 -
Datasheet - 10-VFSOP, 10-MSOP (0.110", 2.80mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 4-Wire Serial 1.7V ~ 5.5V - 1µA @ 3V -40°C ~ 85°C Surface Mount - - 10-TSSOPG
R2221T-E2-F Nisshinbo Micro Devices Inc.

R2221T-E2-F

IC RTC CLK/CALENDAR I2C 10TSSOP

Nisshinbo Micro Devices Inc.

4,974 -
Datasheet - 10-VFSOP, 10-MSOP (0.110", 2.80mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, RAM - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.5V ~ 5.5V - 0.9µA @ 3V -40°C ~ 85°C Surface Mount - - 10-TSSOPG
RV5C348B-E2-F Nisshinbo Micro Devices Inc.

RV5C348B-E2-F

IC RTC CLK/CALENDAR SER 10SSOP

Nisshinbo Micro Devices Inc.

15,798 -
Datasheet - 10-LFSOP, 10-MSOP (0.110", 2.80mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 4-Wire Serial 2V ~ 5.5V - 1µA @ 3V -40°C ~ 85°C Surface Mount - - 10-SSOP-G
R2223L-E2 Nisshinbo Micro Devices Inc.

R2223L-E2

IC RTC CLOCK/CALENDAR I2C 12QFN

Nisshinbo Micro Devices Inc.

12,000 -
Datasheet - 12-XFQFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, RAM - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.5V ~ 5.5V - 0.9µA @ 3V -40°C ~ 85°C Surface Mount - - QFN018018-12
R2051S01-E2-F Nisshinbo Micro Devices Inc.

R2051S01-E2-F

IC RTC CLK/CALENDAR I2C 16SSOP

Nisshinbo Micro Devices Inc.

3,945 -
Datasheet - 16-LSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.34V ~ 5.5V - 1µA @ 3V -40°C ~ 85°C Surface Mount - - 16-SSOP
R2045S-E2-FE Nisshinbo Micro Devices Inc.

R2045S-E2-FE

IC RTC CLK/CALENDAR 4 WIRE 8HSOP

Nisshinbo Micro Devices Inc.

8,866 -
Datasheet - 8-SOIC (0.173", 4.40mm Width) Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial, 4-Wire Serial 1.7V ~ 5.5V - 1.8µA ~ 2µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 8-HSOP-E
R2051L02-E2 Nisshinbo Micro Devices Inc.

R2051L02-E2

IC RTC CLK/CALENDAR I2C 16QFN

Nisshinbo Micro Devices Inc.

8,475 -
Datasheet - 16-XFQFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.34V ~ 5.5V - 1µA @ 3V -40°C ~ 85°C Surface Mount - - QFN023023-16
RV5C348A-E2-F Nisshinbo Micro Devices Inc.

RV5C348A-E2-F

IC RTC CLK/CALENDAR SER 10SSOP

Nisshinbo Micro Devices Inc.

5,609 -
Datasheet - 10-LFSOP, 10-MSOP (0.110", 2.80mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 4-Wire Serial 2V ~ 5.5V - 1µA @ 3V -40°C ~ 85°C Surface Mount - - 10-SSOP-G
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Real Time Clocks FAQ

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Use the available manufacturer and technical filters to compare matching parts by specifications, stock status, pricing and datasheet information.

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Yes. Send the manufacturer part number and required quantity to our sourcing team for availability, lead-time and alternative sourcing support.

Can I request a quotation for a BOM or small-batch requirement?

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What information should I provide when requesting a quote?

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