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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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
RTC-8564JE0:ROHS EPSON

RTC-8564JE0:ROHS

IC RTC CLK/CALENDAR I2C 20VSOJ

EPSON

2,147
RFQ
RTC-8564JE0:ROHS Datasheet

Datasheet

RTC-8564JE 20-LSSOJ (0.213", 5.40mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Y2K - HH:MM:SS YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.7µA ~ 0.8µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 20-VSOJ
AB0814-T3 Abracon LLC

AB0814-T3

IC RTC CLK/CALENDAR SPI 16QFN

Abracon LLC

3,758
RFQ
AB0814-T3 Datasheet

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer 256B HH:MM:SS:hh YY-MM-DD-dd SPI 1.7V ~ 3.6V 1.5V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C Surface Mount - - 16-QFN (3x3)
AB1803-T3 Abracon LLC

AB1803-T3

IC RTC CLK/CALENDAR I2C 16QFN

Abracon LLC

3,348
RFQ
AB1803-T3 Datasheet

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM, Trickle-Charger 64B HH:MM:SS:hh YY-MM-DD-dd I2C, 2-Wire Serial 1.7V ~ 3.6V 1.5V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C Surface Mount - - 16-QFN (3x3)
AB1813-T3 Abracon LLC

AB1813-T3

IC RTC CLK/CALENDAR SPI 16QFN

Abracon LLC

4,467
RFQ
AB1813-T3 Datasheet

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM, Trickle-Charger 64B HH:MM:SS:hh YY-MM-DD-dd SPI 1.7V ~ 3.6V 1.5V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C Surface Mount - - 16-QFN (3x3)
AB0804-T3 Abracon LLC

AB0804-T3

IC RTC CLK/CALENDAR I2C 16QFN

Abracon LLC

3,293
RFQ
AB0804-T3 Datasheet

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer 256B HH:MM:SS:hh YY-MM-DD-dd I2C, 2-Wire Serial 1.7V ~ 3.6V 1.5V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C Surface Mount - - 16-QFN (3x3)
M41T65Q6F STMicroelectronics

M41T65Q6F

IC RTC CLK/CALENDAR I2C 16QFN

STMicroelectronics

2,065
RFQ
M41T65Q6F Datasheet

Datasheet

Timekeeper® 16-VFQFN Exposed Pad Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer - HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 4.4V - 0.7µA ~ 0.95µA @ 1.3V ~ 4.4V -40°C ~ 85°C Surface Mount - - 16-QFN (3x3)
DS1390U-18+T&R Analog Devices Inc./Maxim Integrated

DS1390U-18+T&R

DS1390U-18+T&R

Analog Devices Inc./Maxim Integrated

3,444
RFQ
DS1390U-18+T&R Datasheet

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI, 4-Wire Serial 1.71V ~ 1.89V 1.3V ~ 3.7V 100µA @ 1.71V ~ 1.89V -40°C ~ 85°C (TA) Surface Mount - - 10-uMAX/uSOP
DS1305EN/T&R Analog Devices Inc./Maxim Integrated

DS1305EN/T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

2,026
RFQ
DS1305EN/T&R Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 20-TSSOP
RV-8564-C2-32.768KHZ-10PPM-TA-QC Micro Crystal AG

RV-8564-C2-32.768KHZ-10PPM-TA-QC

IC RTC CLK/CALENDAR I2C 10SON

Micro Crystal AG

2,797
RFQ
RV-8564-C2-32.768KHZ-10PPM-TA-QC Datasheet

Datasheet

C2 10-TDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Programmable Clock Output, Timer - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 5.5V - 0.35µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 10-SON (5x3.2)
RX-4045NBAA0 PURE SN EPSON

RX-4045NBAA0 PURE SN

IC RTC CLK/CALENDAR SPI 22SON

EPSON

2,908
RFQ
RX-4045NBAA0 PURE SN Datasheet

Datasheet

- - Tape & Reel (TR) Active - - - - - - - - - - - - - - -
RX-8035LCB0 PURE SN EPSON

RX-8035LCB0 PURE SN

IC RTC EVENT REC I2C 12VSOJ

EPSON

1,151
RFQ
RX-8035LCB0 PURE SN Datasheet

Datasheet

RX-8035LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Active Not Verified Time Event Recorder Alarm - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.4V ~ 5.5V 1V ~ 5.5V 2.5µA @ 3V -40°C ~ 85°C Surface Mount - - 12-VSOJ
AB1814-T3 Abracon LLC

AB1814-T3

IC RTC CLK/CALENDAR SPI 16QFN

Abracon LLC

4,029
RFQ
AB1814-T3 Datasheet

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer 256B HH:MM:SS:hh YY-MM-DD-dd SPI 1.7V ~ 3.6V 1.5V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C Surface Mount - - 16-QFN (3x3)
AB1804-T3 Abracon LLC

AB1804-T3

IC RTC CLK/CALENDAR I2C 16QFN

Abracon LLC

3,696
RFQ
AB1804-T3 Datasheet

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer 256B HH:MM:SS:hh YY-MM-DD-dd I2C, 2-Wire Serial 1.7V ~ 3.6V 1.5V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C Surface Mount - - 16-QFN (3x3)
M41T81SMY6E STMicroelectronics

M41T81SMY6E

IC RTC CLK/CALENDAR I2C 18SOX

STMicroelectronics

1,391
RFQ
M41T81SMY6E Datasheet

Datasheet

- 18-SOX, 18-SOIC with Crystal (7.5mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Watchdog Timer - HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 2V ~ 3.5V 100µA @ 2.7V ~ 5.5V -40°C ~ 85°C Surface Mount - - 18-SOX
RX-8035LCAA0 PURE SN EPSON

RX-8035LCAA0 PURE SN

IC RTC EVENT REC I2C 12VSOJ

EPSON

2,867
RFQ
RX-8035LCAA0 PURE SN Datasheet

Datasheet

RX-8035LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Active - Clock/Calendar Alarm - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C 2.4V ~ 5.5V 1V ~ 5.5V 2.5µA @ 3V -40°C ~ 85°C Surface Mount - - 12-VSOJ
RV-2123-C2-32.768KHZ-20PPM-TA-QA Micro Crystal AG

RV-2123-C2-32.768KHZ-20PPM-TA-QA

TIMING REAL TIME CLOCK

Micro Crystal AG

1,163
RFQ
RV-2123-C2-32.768KHZ-20PPM-TA-QA Datasheet

Datasheet

C2 10-TDFN Exposed Pad Bulk Active - Clock/Calendar Alarm, Leap Year - HH:MM:SS YY-MM-DD-dd SPI, 4-Wire Serial 5.5V - 180nA @ 3V -40°C ~ 85°C (TA) Surface Mount Automotive AEC-Q100 10-SON (5x3.2)
RTC-4574SA:B3 ROHS EPSON

RTC-4574SA:B3 ROHS

IC RTC CLK/CALENDAR SER 14SOP

EPSON

4,213
RFQ
RTC-4574SA:B3 ROHS Datasheet

Datasheet

RTC-4574SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd 3-Wire Serial 1.6V ~ 5.5V - 1µA ~ 2µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
DS1306EN Analog Devices Inc./Maxim Integrated

DS1306EN

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

4,578
RFQ
DS1306EN Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 20-TSSOP
DS1308U-3+T Analog Devices Inc./Maxim Integrated

DS1308U-3+T

IC RTC CLOCK/CALENDAR I2C 8UMAX

Analog Devices Inc./Maxim Integrated

1,251
RFQ
DS1308U-3+T Datasheet

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 2.7V ~ 5.5V 1.3V ~ 5.5V - -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
RX-8035LC:AA0:PURE SN EPSON

RX-8035LC:AA0:PURE SN

IC RTC EVENT REC I2C 12VSOJ

EPSON

3,521
RFQ
RX-8035LC:AA0:PURE SN Datasheet

Datasheet

RX-8035LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Obsolete Not Verified Time Event Recorder Alarm - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.4V ~ 5.5V 1V ~ 5.5V 2.5µA @ 3V -40°C ~ 85°C Surface Mount - - 12-VSOJ
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Real Time Clocks Electronic Components Sourcing and Lifecycle Support

FPGAX is a global sourcing partner specializing in FPGA and programmable logic solutions for engineering and manufacturing organizations worldwide. For customers sourcing Real Time Clocks components, we support both current production requirements and long-term component availability across demanding product lifecycles.

Our sourcing approach combines traceability, supply stability, and technical coordination. FPGAX is certified to AS9120B, ISO 9001:2008, and ISO 14001 standards and supports procurement programs where continuity, documentation, and dependable component supply are important.

How FPGAX Supports Real Time Clocks Requirements

  • Active component sourcing: support for current FPGA, programmable logic, and related semiconductor requirements.
  • End-of-life sourcing: assistance with obsolete and hard-to-find parts when designs must remain in production.
  • Lifecycle management: sourcing support during product transitions, allocation periods, and supply interruptions.
  • Design continuity: long-term supply support intended to reduce redesign pressure and production disruption.
  • Major programmable logic brands: sourcing coverage includes Xilinx, Intel/Altera, Lattice, Microchip, and QuickLogic.

Supply Support at a Glance

Requirement FPGAX Support
Current production Active FPGA, programmable logic, and semiconductor component sourcing
Legacy programs End-of-life and hard-to-find component sourcing
Supply continuity Lifecycle transition and long-term availability support
Quality requirements Traceable sourcing and quality-management processes

Focused on FPGA and Programmable Logic Supply

FPGAX focuses on helping customers maintain access to critical programmable devices throughout the full component lifecycle. Whether the requirement is for a current design, an established production program, or an older platform facing component obsolescence, our goal is to provide a stable sourcing path and help customers maintain design and manufacturing continuity.

Real Time Clocks FAQ

Can FPGAX source both active and end-of-life Real Time Clocks components?

Yes. FPGAX supports sourcing for both active components and end-of-life or hard-to-find parts, with an emphasis on maintaining supply continuity for engineering and manufacturing programs.

Which programmable logic manufacturers does FPGAX support?

Our core sourcing coverage includes major FPGA and programmable logic manufacturers such as Xilinx, Intel/Altera, Lattice, Microchip, and QuickLogic, subject to specific part requirements and availability.

How does FPGAX help with component lifecycle changes?

We support customers through lifecycle transitions by helping locate current or legacy supply, reducing exposure to supply disruptions, and supporting long-term availability for designs that need to remain in production.

What quality and traceability standards does FPGAX follow?

FPGAX states certification to AS9120B, ISO 9001:2008, and ISO 14001 standards. Our sourcing services are structured around traceability, stable supply, and quality-management requirements.

What information should I provide for a Real Time Clocks sourcing request?

Providing the manufacturer part number, required quantity, target delivery schedule, and any lifecycle or traceability requirements helps us evaluate the sourcing request more efficiently.