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
DS17885S-5+ Analog Devices Inc./Maxim Integrated

DS17885S-5+

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

102
RFQ
DS17885S-5+ Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tube Active Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 8KB 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 - - 24-SOIC
DS1315E-5+ Analog Devices Inc./Maxim Integrated

DS1315E-5+

IC RTC PHANTOM CHIP PAR 20TSSOP

Analog Devices Inc./Maxim Integrated

1,242
RFQ
DS1315E-5+ Datasheet

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tube Active Not Verified Phantom Time Chip Leap Year - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 1.3mA @ 5V 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1747WP-120+ Analog Devices Inc./Maxim Integrated

DS1747WP-120+

IC RTC CLK/CALENDAR PAR 34PCM

Analog Devices Inc./Maxim Integrated

3,119
RFQ
DS1747WP-120+ Datasheet

Datasheet

- 34-PowerCap™ Module Tray Active Not Verified Clock/Calendar Leap Year, NVSRAM, Y2K 512KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V 3V 2mA @ 3.3V 0°C ~ 70°C Surface Mount - - 34-PowerCap Module
DS1747W-120+ Analog Devices Inc./Maxim Integrated

DS1747W-120+

IC RTC CLK/CALENDAR PAR 32EDIP

Analog Devices Inc./Maxim Integrated

264
RFQ
DS1747W-120+ Datasheet

Datasheet

- 32-DIP Module (0.600", 15.24mm) Tube Active Not Verified Clock/Calendar Leap Year, NVSRAM, Y2K 512KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V - 2mA @ 3.3V 0°C ~ 70°C Through Hole - - 32-EDIP
DS1557WP-120IND+ Analog Devices Inc./Maxim Integrated

DS1557WP-120IND+

IC RTC CLK/CALENDAR PAR 34PCM

Analog Devices Inc./Maxim Integrated

2,814
RFQ
DS1557WP-120IND+ Datasheet

Datasheet

- 34-PowerCap™ Module Tray Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K 512KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V 3V 4mA @ 3.3V -40°C ~ 85°C Surface Mount - - 34-PowerCap Module
MCP79400T-I/MNY Microchip Technology

MCP79400T-I/MNY

IC RTC CLK/CALENDAR I2C 8TDFN

Microchip Technology

4,059
RFQ
MCP79400T-I/MNY Datasheet

Datasheet

- 8-WFDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA (Typ) @ 3.3V -40°C ~ 85°C Surface Mount - - 8-TDFN (2x3)
RX8130CE B6 EPSON

RX8130CE B6

IC RTC CLK/CALENDAR I2C 10SMD

EPSON

1,864
RFQ
RX8130CE B6 Datasheet

Datasheet

RX8130CE 10-SMD, No Lead Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Watchdog Timer - HH:MM:SS YY-MM-DD I2C 1.25V ~ 5.5V 1.1V ~ 5.5V 4µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 10-SMD
PT7C4337WEX Diodes Incorporated

PT7C4337WEX

IC RTC CLK/CALENDAR I2C 8SOIC

Diodes Incorporated

4,221
RFQ
PT7C4337WEX Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.8µA @ 1.3V ~ 1.8V -40°C ~ 85°C (TA) Surface Mount - - 8-SOIC
BU9873NUX-TTR Rohm Semiconductor

BU9873NUX-TTR

IC RTC CLK/CALENDAR I2C 8VSON

Rohm Semiconductor

9,119
RFQ
BU9873NUX-TTR Datasheet

Datasheet

- 8-UFDFN Exposed Pad Tape & Reel (TR) Not For New Designs Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 1µA ~ 1.35µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - VSON008X2030
BU9873FVT-GE2 Rohm Semiconductor

BU9873FVT-GE2

IC RTC CLK/CALENDAR I2C 8TSSOP

Rohm Semiconductor

5,505
RFQ
BU9873FVT-GE2 Datasheet

Datasheet

- 8-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Not For New Designs Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 1µA ~ 1.35µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-TSSOP-B
1338D-31DVGI Renesas Electronics Corporation

1338D-31DVGI

1338D-31 REAL TIME CLOCK

Renesas Electronics Corporation

384
RFQ
1338D-31DVGI Datasheet

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Active - Clock/Calendar Leap Year, RAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C 3.3V ~ 5.5V 1.3V ~ 3.7V 2µA @ 3.63V -40°C ~ 85°C (TA) Surface Mount - - 8-TSSOP
BU9873F-GTE2 Rohm Semiconductor

BU9873F-GTE2

IC RTC CLOCK/CALENDAR I2C 8SOP

Rohm Semiconductor

281
RFQ
BU9873F-GTE2 Datasheet

Datasheet

- 8-SOIC (0.173", 4.40mm Width) Tape & Reel (TR) Not For New Designs Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 1µA ~ 1.35µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOP
MCP795W21-I/ST Microchip Technology

MCP795W21-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

192
RFQ
MCP795W21-I/ST Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tube Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer 64B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.8V ~ 3.6V 1.3V ~ 3.6V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
AM0815AQ Ambiq Micro, Inc.

AM0815AQ

RTC ARTASIE SPI LO PWR 16QFN

Ambiq Micro, Inc.

8,736
RFQ
AM0815AQ Datasheet

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger, Unique ID, Watchdog Timer 256B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.5V ~ 3.6V 1.4V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C (TA) Surface Mount - - 16-QFN (3x3)
AM0805AQ Ambiq Micro, Inc.

AM0805AQ

RTC ARTASIE I2C LO PWR 16QFN

Ambiq Micro, Inc.

8,285
RFQ
AM0805AQ Datasheet

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger, Unique ID, Watchdog Timer 256B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd I2C 1.5V ~ 3.6V 1.4V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C (TA) Surface Mount - - 16-QFN (3x3)
RV-8263-C8-32.768KHZ-20PPM-TA-QC Micro Crystal AG

RV-8263-C8-32.768KHZ-20PPM-TA-QC

IC RTC CLK/CALENDAR I2C 8-SMT

Micro Crystal AG

798
RFQ
RV-8263-C8-32.768KHZ-20PPM-TA-QC Datasheet

Datasheet

C8 8-WCDFN Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, Offset Compensation, Programmable Clock Output, RAM, Timer 1B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 0.9V ~ 5.5V - 0.24µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 8-SON (2x1.2)
RV-8063-C8-32.768KHZ-20PPM-TA-QC Micro Crystal AG

RV-8063-C8-32.768KHZ-20PPM-TA-QC

IC RTC CLK/CALENDAR SPI 8-SMT

Micro Crystal AG

984
RFQ
RV-8063-C8-32.768KHZ-20PPM-TA-QC Datasheet

Datasheet

C8 8-WCDFN Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, Offset Compensation, Programmable Clock Output, RAM, Timer 1B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI, 3-Wire Serial 0.9V ~ 5.5V - 0.24µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 8-SON (2x1.2)
AM1815AQ Ambiq Micro, Inc.

AM1815AQ

RTC ARTASIE SPI W/PWR MNGT 16QFN

Ambiq Micro, Inc.

5,831
RFQ
AM1815AQ Datasheet

Datasheet

Artasie 16-VFQFN Exposed Pad Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Supervisor, Trickle Charger, Unique ID, Watchdog Timer 256B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.5V ~ 3.6V 1.4V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C (TA) Surface Mount - - 16-QFN (3x3)
RV-8063-C8-32.768KHZ-20PPM-TA-QA Micro Crystal AG

RV-8063-C8-32.768KHZ-20PPM-TA-QA

IC RTC CLK/CALENDAR SPI 8-SMT

Micro Crystal AG

992
RFQ
RV-8063-C8-32.768KHZ-20PPM-TA-QA Datasheet

Datasheet

C8 8-WCDFN Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, Offset Compensation, Programmable Clock Output, RAM, Timer 1B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI, 3-Wire Serial 0.9V ~ 5.5V - 0.24µA @ 3V -40°C ~ 85°C (TA) Surface Mount Automotive AEC-Q200 8-SON (2x1.2)
1337AGDVGI Renesas Electronics Corporation

1337AGDVGI

IC RTC CLK/CALENDAR I2C 8TSSOP

Renesas Electronics Corporation

250
RFQ
1337AGDVGI Datasheet

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.3µA @ 1.3V ~ 1.8V -40°C ~ 85°C Surface Mount - - 8-TSSOP
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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.