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
RX-8035SA:B3 PURE SN EPSON

RX-8035SA:B3 PURE SN

IC RTC TIME EVENT REC I2C 14SOP

EPSON

1,000
RFQ
RX-8035SA:B3 PURE SN Datasheet

Datasheet

RX-8035SA 14-SOIC (0.197", 5.00mm 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 - - 14-SOP
DS1306E+T&R Analog Devices Inc./Maxim Integrated

DS1306E+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

6,266
RFQ
DS1306E+T&R Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active 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 0°C ~ 70°C Surface Mount - - 20-TSSOP
AB-RTCMC-32.768KHZ-EOZ9-S3-DBT Abracon LLC

AB-RTCMC-32.768KHZ-EOZ9-S3-DBT

IC RTC CLK/CALENDAR I2C MODULE

Abracon LLC

1,969
RFQ
AB-RTCMC-32.768KHZ-EOZ9-S3-DBT Datasheet

Datasheet

- 10-SMD Module Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Trickle-Charger 8B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.4V ~ 5.5V 1.4V ~ 5.5V 1.5µA ~ 2.2µA @ 1.4V ~ 5V -40°C ~ 85°C Surface Mount - - Module
DS1388Z-33+T&R Analog Devices Inc./Maxim Integrated

DS1388Z-33+T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

4,270
RFQ
DS1388Z-33+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 2.97V ~ 3.63V 1.3V ~ 5.5V 150µA @ 2.97V ~ 3.63V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1388Z-5+ Analog Devices Inc./Maxim Integrated

DS1388Z-5+

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

740
RFQ
DS1388Z-5+ Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube 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 4.5V ~ 5.5V 1.3V ~ 5.5V 270µA @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1682S+T&R Analog Devices Inc./Maxim Integrated

DS1682S+T&R

IC RTC ELAPSED CNT I2C 8SOIC

Analog Devices Inc./Maxim Integrated

5,579
RFQ
DS1682S+T&R Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Verified Elapsed Time Counter Alarm, EEPROM 10B Binary Binary I2C, 2-Wire Serial 2.5V ~ 5.5V - 4µA ~ 15µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL12020MIRZ Renesas Electronics Corporation

ISL12020MIRZ

IC RTC CLK/CALENDAR I2C 20DFN

Renesas Electronics Corporation

498
RFQ
ISL12020MIRZ Datasheet

Datasheet

- 20-PowerLFDFN Tube Active Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, SRAM 128B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 14µA ~ 15µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 20-DFN (5.5x4)
DS1388Z-33+ Analog Devices Inc./Maxim Integrated

DS1388Z-33+

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

2,198
RFQ
DS1388Z-33+ Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube 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 2.97V ~ 3.63V 1.3V ~ 5.5V 150µA @ 2.97V ~ 3.63V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1305E+T&R Analog Devices Inc./Maxim Integrated

DS1305E+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

7,616
RFQ
DS1305E+T&R Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active 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 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1306EN+T&R Analog Devices Inc./Maxim Integrated

DS1306EN+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

5,549
RFQ
DS1306EN+T&R Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active 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
M41ST87WMX6TR STMicroelectronics

M41ST87WMX6TR

IC RTC CLOCK/CALENDAR I2C 28SO

STMicroelectronics

4,044
RFQ
M41ST87WMX6TR Datasheet

Datasheet

- 28-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer 128B HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 3.6V 2.5V ~ 3.6V 0.5mA @ 2.7V ~ 3.6V -40°C ~ 85°C Surface Mount - - 28-SO
DS1305EN+T&R Analog Devices Inc./Maxim Integrated

DS1305EN+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

5,805
RFQ
DS1305EN+T&R Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active 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
DS1682S+ Analog Devices Inc./Maxim Integrated

DS1682S+

IC RTC ELAPSED CNT I2C 8SOIC

Analog Devices Inc./Maxim Integrated

2,295
RFQ
DS1682S+ Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Active Verified Elapsed Time Counter Alarm, EEPROM 10B Binary Binary I2C, 2-Wire Serial 2.5V ~ 5.5V - 4µA ~ 15µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1305E+ Analog Devices Inc./Maxim Integrated

DS1305E+

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

1,702
RFQ
DS1305E+ Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tube Active 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 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1339C-33#T&R Analog Devices Inc./Maxim Integrated

DS1339C-33#T&R

IC RTC CLK/CALENDAR I2C 16SOIC

Analog Devices Inc./Maxim Integrated

3,109
RFQ
DS1339C-33#T&R Datasheet

Datasheet

- 16-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.97V ~ 5.5V 1.3V ~ 3.7V 200µA @ 5.5V -40°C ~ 85°C Surface Mount - - 16-SOIC
DS1306EN+ Analog Devices Inc./Maxim Integrated

DS1306EN+

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

938
RFQ
DS1306EN+ Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tube Active 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
RX-8035LC:B3 PURE SN EPSON

RX-8035LC:B3 PURE SN

IC RTC EVENT REC I2C 12VSOJ

EPSON

892
RFQ
RX-8035LC:B3 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
DS1374C-33#T&R Analog Devices Inc./Maxim Integrated

DS1374C-33#T&R

IC RTC BINARY COUNTER I2C 16SOIC

Analog Devices Inc./Maxim Integrated

1,000
RFQ
DS1374C-33#T&R Datasheet

Datasheet

- 16-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified Binary Counter Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer - Binary Binary I2C, 2-Wire Serial 2.97V ~ 5.5V 1.3V ~ 5.5V 175µA @ 2.97V ~ 5.5V -40°C ~ 85°C Surface Mount - - 16-SOIC
DS1305+ Analog Devices Inc./Maxim Integrated

DS1305+

IC RTC CLK/CALENDAR SPI 16DIP

Analog Devices Inc./Maxim Integrated

965
RFQ
DS1305+ Datasheet

Datasheet

- 16-DIP (0.300", 7.62mm) Tube Active 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 0°C ~ 70°C Through Hole - - 16-PDIP
RX8900CE:UA3 EPSON

RX8900CE:UA3

IC RTC CLK/CALENDAR I2C 10SMD

EPSON

11,442
RFQ
RX8900CE:UA3 Datasheet

Datasheet

RX8900CE 10-SMD, No Lead Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm - HH:MM:SS (24 hr) YY-MM-DD-dd I2C 2.5V ~ 5.5V 1.6V ~ 5.5V 1.4µA ~ 1.5µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 10-SMD
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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.