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
DS1343E-33+T&R Analog Devices Inc./Maxim Integrated

DS1343E-33+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

4,322
RFQ
DS1343E-33+T&R Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active 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 3V ~ 5.5V 1.3V ~ 5.5V 120µA ~ 160µA @ 3.63V ~ 5.5V -40°C ~ 85°C Surface Mount - - 20-TSSOP
RX-4574LCBX PURE SN EPSON

RX-4574LCBX PURE SN

MODULE RTC SPI 32.768KHZ 12VSOJ

EPSON

3,500
RFQ

-

- - Tape & Reel (TR) Obsolete Not Verified - - - - - - - - - - - - - -
RTC-4543SB:B3 ROHS EPSON

RTC-4543SB:B3 ROHS

IC RTC CLK/CALENDAR SER 18SOP

EPSON

3,532
RFQ
RTC-4543SB:B3 ROHS Datasheet

Datasheet

RTC-4543SB 18-SOIC (0.213", 5.40mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd 3-Wire Serial 2.5V ~ 5.5V - 1µA ~ 3µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 18-SOP
DS1344E-33+T&R Analog Devices Inc./Maxim Integrated

DS1344E-33+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

2,164
RFQ
DS1344E-33+T&R Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active 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 3V ~ 5.5V 1.3V ~ 5.5V 120µA ~ 160µA @ 3.63V ~ 5.5V -40°C ~ 85°C Surface Mount - - 20-TSSOP
RX-8035SA:B PURE SN R EPSON

RX-8035SA:B PURE SN R

IC RTC TIME EVENT REC I2C 14SOP

EPSON

3,225
RFQ
RX-8035SA:B PURE SN R Datasheet

Datasheet

RX-8035SA 14-SOIC (0.197", 5.00mm Width) Tube 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 - - 14-SOP
DS12R885S-33+T&R Analog Devices Inc./Maxim Integrated

DS12R885S-33+T&R

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

4,630
RFQ
DS12R885S-33+T&R Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active 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 2.97V ~ 3.63V 2V ~ 3.05V 2mA @ 2.97V ~ 3.63V -40°C ~ 85°C Surface Mount - - 24-SOIC
DS12R885S-5+T&R Analog Devices Inc./Maxim Integrated

DS12R885S-5+T&R

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

4,478
RFQ
DS12R885S-5+T&R Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active 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 - - 24-SOIC
DS1374C-3#T&R Analog Devices Inc./Maxim Integrated

DS1374C-3#T&R

IC RTC BINARY COUNTER I2C 16SOIC

Analog Devices Inc./Maxim Integrated

3,500
RFQ
DS1374C-3#T&R Datasheet

Datasheet

- 16-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Obsolete Not Verified Binary Counter Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer - Binary Binary I2C, 2-Wire Serial 2.7V ~ 3.3V 1.3V ~ 3.7V 125µA @ 2.7V ~ 3.3V -40°C ~ 85°C Surface Mount - - 16-SOIC
RX4111CE A3 EPSON

RX4111CE A3

IC RTC CLK/CALENDAR SPI 10SMD

EPSON

3,068
RFQ
RX4111CE A3 Datasheet

Datasheet

RX4111CE 10-SMD, No Lead Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, RAM - HH:MM:SS YY-MM-DD SPI, 4-Wire Serial 1.6V ~ 5.5V - 3µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 10-SMD
DS1678S/T&R Analog Devices Inc./Maxim Integrated

DS1678S/T&R

IC RTC TIME EVENT REC I2C 8SOIC

Analog Devices Inc./Maxim Integrated

3,839
RFQ
DS1678S/T&R Datasheet

Datasheet

- 8-SOIC (0.209", 5.30mm Width) Tape & Reel (TR) Obsolete Not Verified Time Event Recorder Alarm, Leap Year, NVSRAM, Y2K 32B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2.6V ~ 3.5V - -40°C ~ 85°C Surface Mount - - 8-SOIC
RV-3049-C3-TB-QA-OPT B EM Microelectronic

RV-3049-C3-TB-QA-OPT B

LINEAR IC

EM Microelectronic

4,992
RFQ
RV-3049-C3-TB-QA-OPT B Datasheet

Datasheet

- - Tape & Reel (TR) Active - - - - - - - - - - - - - - -
M41T11MH6E STMicroelectronics

M41T11MH6E

IC RTC CLK/CALENDAR I2C 28SOH

STMicroelectronics

4,444
RFQ
M41T11MH6E Datasheet

Datasheet

- 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM 56B HH:MM:SS YY-MM-DD-dd I2C, 2-Wire Serial 2V ~ 5.5V 2.5V ~ 3.5V 70µA @ 2V ~ 5.5V -40°C ~ 85°C Surface Mount - - 28-SOH
DS1685SN-3 Analog Devices Inc./Maxim Integrated

DS1685SN-3

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

2,246
RFQ
DS1685SN-3 Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, NVSRAM, Square Wave Output, Y2K 242B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.7V 2.5V ~ 3.7V 2mA @ 3V -40°C ~ 85°C Surface Mount - - 24-SOIC
DS1685EN-3 Analog Devices Inc./Maxim Integrated

DS1685EN-3

IC RTC CLK/CALENDAR PAR 24TSSOP

Analog Devices Inc./Maxim Integrated

4,895
RFQ
DS1685EN-3 Datasheet

Datasheet

- 24-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, NVSRAM, Square Wave Output, Y2K 242B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.7V 2.5V ~ 3.7V 2mA @ 3V -40°C ~ 85°C Surface Mount - - 24-TSSOP
DS1685SN-5/T&R Analog Devices Inc./Maxim Integrated

DS1685SN-5/T&R

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

4,740
RFQ
DS1685SN-5/T&R Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, NVSRAM, Square Wave Output, Y2K 242B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 5V -40°C ~ 85°C Surface Mount - - 24-SOIC
DS1685EN-3/T&R Analog Devices Inc./Maxim Integrated

DS1685EN-3/T&R

IC RTC CLK/CALENDAR PAR 24TSSOP

Analog Devices Inc./Maxim Integrated

4,017
RFQ
DS1685EN-3/T&R Datasheet

Datasheet

- 24-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, NVSRAM, Square Wave Output, Y2K 242B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.7V 2.5V ~ 3.7V 2mA @ 3V -40°C ~ 85°C Surface Mount - - 24-TSSOP
DS1388Z-3+T&R Analog Devices Inc./Maxim Integrated

DS1388Z-3+T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

4,863
RFQ
DS1388Z-3+T&R Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar EEPROM, Leap Year, Supervisor, Trickle-Charger, Watchdog Timer 512B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 3.3V 1.3V ~ 5.5V 140µA @ 2.7V ~ 3.3V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1602+ Analog Devices Inc./Maxim Integrated

DS1602+

IC RTC ELAPSED CNT SER 8DIP

Analog Devices Inc./Maxim Integrated

3,266
RFQ
DS1602+ Datasheet

Datasheet

- 8-DIP (0.300", 7.62mm) Tube Obsolete Not Verified Elapsed Time Counter - - Binary Binary 3-Wire Serial 4.5V ~ 5.5V 2.5V ~ 3.5V 50µA @ 5V -40°C ~ 85°C Through Hole - - 8-PDIP
DS1302S-16 Analog Devices Inc./Maxim Integrated

DS1302S-16

IC RTC CLK/CALENDAR SER 16SOIC

Analog Devices Inc./Maxim Integrated

4,740
RFQ
DS1302S-16 Datasheet

Datasheet

- 16-SOIC (0.295", 7.50mm Width) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Trickle-Charger 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2V ~ 5.5V 2V ~ 5.5V 0.3µA ~ 1µA @ 2V ~ 5V 0°C ~ 70°C Surface Mount - - 16-SOIC
RX-4801SA:UB0 PURE SN EPSON

RX-4801SA:UB0 PURE SN

IC RTC CLK/CALENDAR SER 14SOP

EPSON

4,902
RFQ
RX-4801SA:UB0 PURE SN Datasheet

Datasheet

RX-4801SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm - - - 4-Wire Serial 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
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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.