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
AB-RTCMC-32.768KHZ-EOA9-S3-HAT Abracon LLC

AB-RTCMC-32.768KHZ-EOA9-S3-HAT

IC RTC CLK/CALENDAR SPI MODULE

Abracon LLC

4,801
RFQ
AB-RTCMC-32.768KHZ-EOA9-S3-HAT Datasheet

Datasheet

- 10-SMD Module Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, TCXO/Crystal, Trickle-Charger - HH:MM:SS:hh YY-MM-DD-dd SPI 1.4V ~ 5.5V, 2.1V ~ 5.5V 1.4V ~ 5.5V 4.6µA ~ 5.5µA @ 1.4V ~ 5V -40°C ~ 125°C Surface Mount - - Module
AB-RTCMC-32.768KHZ-EOZ9-S3-HAT Abracon LLC

AB-RTCMC-32.768KHZ-EOZ9-S3-HAT

IC RTC CLK/CALENDAR I2C MODULE

Abracon LLC

3,443
RFQ
AB-RTCMC-32.768KHZ-EOZ9-S3-HAT Datasheet

Datasheet

- 10-SMD Module Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, TCXO/Crystal, Trickle-Charger - HH:MM:SS:hh YY-MM-DD-dd I2C 1.4V ~ 5.5V, 2.1V ~ 5.5V 1.4V ~ 5.5V 4.6µA ~ 5.5µA @ 1.4V ~ 5V -40°C ~ 125°C Surface Mount - - Module
M41ST87YMX6TR STMicroelectronics

M41ST87YMX6TR

IC RTC CLOCK/CALENDAR I2C 28SO

STMicroelectronics

1,811
RFQ
M41ST87YMX6TR Datasheet

Datasheet

- 28-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Obsolete 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 4.5V ~ 5.5V 2.5V ~ 5.5V 1mA @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 28-SO
DS17285SN-5 Analog Devices Inc./Maxim Integrated

DS17285SN-5

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

1,728
RFQ
DS17285SN-5 Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 2KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 24-SOIC
DS17285SN-3 Analog Devices Inc./Maxim Integrated

DS17285SN-3

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

2,208
RFQ
DS17285SN-3 Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 2KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.7V 2.5V ~ 3.7V 2mA @ 2.7V ~ 3.7V -40°C ~ 85°C Surface Mount - - 24-SOIC
DS17285E-3 Analog Devices Inc./Maxim Integrated

DS17285E-3

IC RTC CLK/CALENDAR PAR 28TSOP

Analog Devices Inc./Maxim Integrated

4,855
RFQ
DS17285E-3 Datasheet

Datasheet

- 28-TSSOP (0.465", 11.80mm Width) Bag Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 2KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.7V 2.5V ~ 3.7V 2mA @ 2.7V ~ 3.7V 0°C ~ 70°C Surface Mount - - 28-TSOP
M41ST87YMX6 STMicroelectronics

M41ST87YMX6

IC RTC CLOCK/CALENDAR I2C 28SO

STMicroelectronics

4,653
RFQ
M41ST87YMX6 Datasheet

Datasheet

- 28-SOIC (0.295", 7.50mm Width) Tube Obsolete 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 4.5V ~ 5.5V 2.5V ~ 5.5V 1mA @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 28-SO
RX-4571NB:B EPSON

RX-4571NB:B

IC RTC CLK/CALENDAR SER 22SON

EPSON

3,701
RFQ
RX-4571NB:B Datasheet

Datasheet

RX-4571NB 22-LFDFN Strip Active Not Verified Clock/Calendar Alarm, Leap Year - - - 3-Wire Serial 1.6V ~ 5.5V - 0.95µA ~ 1µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 22-SON (6.3x4.8)
RX-4571NB:BX PURE SN EPSON

RX-4571NB:BX PURE SN

IC RTC CLK/CALENDAR SER 22SON

EPSON

3,547
RFQ
RX-4571NB:BX PURE SN Datasheet

Datasheet

RX-4571NB 22-SMD, 20 Leads, Flat Leads Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - - - 3-Wire Serial 1.6V ~ 5.5V - 0.95µA ~ 1µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 22-SON (6.3x4.8)
RX-4801SA:UB3 PURE SN EPSON

RX-4801SA:UB3 PURE SN

IC RTC CLK/CALENDAR SPI 14SOP

EPSON

1,632
RFQ
RX-4801SA:UB3 PURE SN Datasheet

Datasheet

RX-4801SA 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 SPI 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
DS12885T/T&R Analog Devices Inc./Maxim Integrated

DS12885T/T&R

IC RTC CLK/CALENDAR PAR 32TQFP

Analog Devices Inc./Maxim Integrated

4,517
RFQ
DS12885T/T&R Datasheet

Datasheet

- 32-TQFP Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 114B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 4V 15mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 32-TQFP (7x7)
DS1558W Analog Devices Inc./Maxim Integrated

DS1558W

IC RTC CLK/CALENDAR PAR 48LQFP

Analog Devices Inc./Maxim Integrated

4,691
RFQ
DS1558W Datasheet

Datasheet

- 48-LQFP Bag Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer, Y2K - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V 2.5V ~ 3.7V 2mA @ 3.3V -40°C ~ 85°C Surface Mount - - 48-LQFP (7x7)
DS1558Y Analog Devices Inc./Maxim Integrated

DS1558Y

IC RTC CLK/CALENDAR PAR 48LQFP

Analog Devices Inc./Maxim Integrated

4,905
RFQ
DS1558Y Datasheet

Datasheet

- 48-LQFP Bag Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer, Y2K - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 6mA @ 5V -40°C ~ 85°C Surface Mount - - 48-LQFP (7x7)
M41ST87WMX6 STMicroelectronics

M41ST87WMX6

IC RTC CLOCK/CALENDAR I2C 28SO

STMicroelectronics

1,452
RFQ
M41ST87WMX6 Datasheet

Datasheet

- 28-SOIC (0.295", 7.50mm Width) Tube Obsolete 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
DS1689SN/T&R Analog Devices Inc./Maxim Integrated

DS1689SN/T&R

IC RTC CLK/CALENDAR PAR 28SOIC

Analog Devices Inc./Maxim Integrated

3,546
RFQ
DS1689SN/T&R Datasheet

Datasheet

- 28-SOIC (0.337", 8.56mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar NVSRAM 114B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.3V, 4.5V ~ 5.5V 2.5V ~ 3.7V 2mA @ 3V, 3mA @ 5V -40°C ~ 85°C Surface Mount - - 28-SOIC
DS1689SN+T&R Analog Devices Inc./Maxim Integrated

DS1689SN+T&R

IC RTC CLK/CALENDAR PAR 28SOIC

Analog Devices Inc./Maxim Integrated

4,374
RFQ
DS1689SN+T&R Datasheet

Datasheet

- 28-SOIC (0.337", 8.56mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar NVSRAM 114B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.3V, 4.5V ~ 5.5V 2.5V ~ 3.7V 2mA @ 3V, 3mA @ 5V -40°C ~ 85°C Surface Mount - - 28-SOIC
BQ4802YDWRG4 Texas Instruments

BQ4802YDWRG4

IC RTC CLK/CALENDAR PAR 28SOIC

Texas Instruments

2,234
RFQ
BQ4802YDWRG4 Datasheet

Datasheet

- 28-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Discontinued at Digi-Key Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.4V ~ 4V 1.5mA (Typ) @ 4.5 V ~ 5.5 V 0°C ~ 70°C Surface Mount - - 28-SOIC
RTC-4574JE:B3 ROHS EPSON

RTC-4574JE:B3 ROHS

IC RTC CLK/CALENDAR SER 20VSOJ

EPSON

1,048
RFQ
RTC-4574JE:B3 ROHS Datasheet

Datasheet

RTC-4574JE 20-LSSOJ (0.213", 5.40mm 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 - - 20-VSOJ
RTC-4574NB:B3 ROHS EPSON

RTC-4574NB:B3 ROHS

IC RTC CLK/CALENDAR SER 22SON

EPSON

1,538
RFQ
RTC-4574NB:B3 ROHS Datasheet

Datasheet

RTC-4574NB 22-LFDFN 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 - - 22-SON (6.3x4.8)
DS2404S-001 Analog Devices Inc./Maxim Integrated

DS2404S-001

IC RTC BINARY CTR 1-WIRE 16SOIC

Analog Devices Inc./Maxim Integrated

3,547
RFQ
DS2404S-001 Datasheet

Datasheet

EconoRAM 16-SOIC (0.295", 7.50mm Width) Tube Obsolete Not Verified Binary Counter Alarm, Square Wave Output, SRAM 512B Binary Binary 1-Wire® and 3-Wire 2.8V ~ 5.5V 2.8V ~ 5.5V 500µA @ 5V -40°C ~ 85°C Surface Mount - - 16-SOIC
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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.