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
DS1685E-5 Analog Devices Inc./Maxim Integrated

DS1685E-5

IC RTC CLK/CALENDAR PAR 24TSSOP

Analog Devices Inc./Maxim Integrated

4,127
RFQ
DS1685E-5 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 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 5V 0°C ~ 70°C Surface Mount - - 24-TSSOP
X1228S14I-4.5A Intersil

X1228S14I-4.5A

IC RTC CLK/CALENDAR I2C 14SOIC

Intersil

4,990
RFQ
X1228S14I-4.5A Datasheet

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 10µA ~ 20µA @ 2.7V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOIC
DS17285-5 Analog Devices Inc./Maxim Integrated

DS17285-5

IC RTC CLK/CALENDAR PAR 24DIP

Analog Devices Inc./Maxim Integrated

2,252
RFQ
DS17285-5 Datasheet

Datasheet

- 24-DIP (0.600", 15.24mm) 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 0°C ~ 70°C Through Hole - - 24-PDIP
DS17285E-3+ Analog Devices Inc./Maxim Integrated

DS17285E-3+

IC RTC CLK/CALENDAR PAR 28-TSOP

Analog Devices Inc./Maxim Integrated

4,192
RFQ
DS17285E-3+ Datasheet

Datasheet

* - Tray Obsolete Not Verified - - - - - - - - - - - - - -
CDP6818DX Harris Corporation

CDP6818DX

IC RTC CLK/CALENDAR 24CERDIP

Harris Corporation

3,598
RFQ
CDP6818DX Datasheet

Datasheet

- 24-CDIP (0.300", 7.62mm) Bulk Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output 50B HH:MM:SS (12/24 hr) YY-MM-DD-dd - 3V ~ 6V - 50µA ~ 3mA @ 3V ~ 5V 0°C ~ 70°C (TA) Through Hole - - 24-CERDIP
DS1315-33 Analog Devices Inc./Maxim Integrated

DS1315-33

IC RTC PHANTOM CHIP PAR 16DIP

Analog Devices Inc./Maxim Integrated

1,876
RFQ
DS1315-33 Datasheet

Datasheet

- 16-DIP (0.300", 7.62mm) Tube Obsolete Not Verified Phantom Time Chip Leap Year - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 3V ~ 3.6V 2.5V ~ 3.7V 1.1mA @ 3.3V 0°C ~ 70°C Through Hole - - 16-PDIP
DS12885TN+ Analog Devices Inc./Maxim Integrated

DS12885TN+

IC RTC CLK/CALENDAR PAR 32TQFP

Analog Devices Inc./Maxim Integrated

1,626
RFQ
DS12885TN+ 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 -40°C ~ 85°C Surface Mount - - 32-TQFP (7x7)
V3022SO28A+ EM Microelectronic

V3022SO28A+

IC RTC CLOCK/CALENDAR 28SOIC

EM Microelectronic

2,115
RFQ
V3022SO28A+ Datasheet

Datasheet

- 28-SOIC (0.295", 7.50mm Width) Tube Last Time Buy Not Verified Clock/Calendar Alarm, Leap Year, RAM 8B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd - 2V ~ 5.5V - 15µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 28-SOIC
DS17885-3+ Analog Devices Inc./Maxim Integrated

DS17885-3+

IC RTC CLK/CALENDAR PAR 24DIP

Analog Devices Inc./Maxim Integrated

1,503
RFQ
DS17885-3+ Datasheet

Datasheet

- 24-DIP (0.600", 15.24mm) Tube Obsolete 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 2.7V ~ 3.7V 2.5V ~ 3.7V 2mA @ 2.7V ~ 3.7V 0°C ~ 70°C Through Hole - - 24-PDIP
CDP6818D Harris Corporation

CDP6818D

IC RTC CLK/CALENDAR 24CERDIP

Harris Corporation

3,799
RFQ
CDP6818D Datasheet

Datasheet

- 24-CDIP (0.300", 7.62mm) Bulk Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output 50B HH:MM:SS (12/24 hr) YY-MM-DD-dd - 3V ~ 6V - 50µA ~ 3mA @ 3V ~ 5V 0°C ~ 70°C (TA) Through Hole - - 24-CERDIP
BQ4802YDW Benchmarq

BQ4802YDW

IC RTC CLK/CALENDAR PAR 28SOIC

Benchmarq

3,124
RFQ
BQ4802YDW Datasheet

Datasheet

- 28-SOIC (0.295", 7.50mm Width) Bulk Active 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
DS1553W-150 Analog Devices Inc./Maxim Integrated

DS1553W-150

IC RTC CLK/CALENDAR PAR 28EDIP

Analog Devices Inc./Maxim Integrated

1,637
RFQ
DS1553W-150 Datasheet

Datasheet

- 28-DIP Module (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K 8KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V 3V 2mA @ 3.3V 0°C ~ 70°C Through Hole - - 28-EDIP
DS1554W-120+ Analog Devices Inc./Maxim Integrated

DS1554W-120+

IC RTC CLK/CALENDAR PAR 32-EDIP

Analog Devices Inc./Maxim Integrated

2,675
RFQ
DS1554W-120+ Datasheet

Datasheet

- 32-DIP Module (0.600", 15.24mm) Bulk Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K 32KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V - 4mA @ 3.3V 0°C ~ 70°C Through Hole - - 32-EDIP
DS1244WP-120IND+ Analog Devices Inc./Maxim Integrated

DS1244WP-120IND+

IC RTC PHANTOM CHIP PAR 34PCM

Analog Devices Inc./Maxim Integrated

3,466
RFQ
DS1244WP-120IND+ Datasheet

Datasheet

- 34-PowerCap™ Module Bulk Obsolete Not Verified Phantom Time Chip Leap Year, NVSRAM 32KB HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V 3V 7mA @ 3.3V -40°C ~ 85°C Surface Mount - - 34-PowerCap Module
DS1556W-120 Analog Devices Inc./Maxim Integrated

DS1556W-120

IC RTC CLK/CALENDAR PAR 32EDIP

Analog Devices Inc./Maxim Integrated

4,306
RFQ
DS1556W-120 Datasheet

Datasheet

- 32-DIP Module (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K 128KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V - 4mA @ 3.3V 0°C ~ 70°C Through Hole - - 32-EDIP
DP8570AV National Semiconductor

DP8570AV

IC RTC TIMER PERIPH PAR 28PLCC

National Semiconductor

3,118
RFQ
DP8570AV Datasheet

Datasheet

- 28-LCC (J-Lead) Bulk Active Not Verified Timer Clock Peripheral (TCP) Alarm, Leap Year 44B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.2V ~ 5.1V 1µA @ 5V -40°C ~ 85°C Surface Mount - - 28-PLCC (11.51x11.51)
DS1251W-120+ Analog Devices Inc./Maxim Integrated

DS1251W-120+

IC RTC PHANTOM PAR 32-DIP

Analog Devices Inc./Maxim Integrated

4,841
RFQ
DS1251W-120+ Datasheet

Datasheet

- 32-DIP Module (0.600", 15.24mm) Bulk Obsolete Not Verified Phantom Time Chip Leap Year, NVSRAM 512KB HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V - 7mA @ 3.3V 0°C ~ 70°C Through Hole - - 32-EDIP
DS1315SN-33+ Analog Devices Inc./Maxim Integrated

DS1315SN-33+

IC RTC PHANTOM CHIP PAR 16SOIC

Analog Devices Inc./Maxim Integrated

4,972
RFQ
DS1315SN-33+ Datasheet

Datasheet

- 16-SOIC (0.295", 7.50mm Width) Tube Active Not Verified Phantom Time Chip Leap Year - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 3V ~ 3.6V 2.5V ~ 3.7V 1.1mA @ 3.3V -40°C ~ 85°C Surface Mount - - 16-SOIC
DS1315EN-33+ Analog Devices Inc./Maxim Integrated

DS1315EN-33+

IC RTC PHANTOM CHIP PAR 20TSSOP

Analog Devices Inc./Maxim Integrated

1,867
RFQ
DS1315EN-33+ 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 3V ~ 3.6V 2.5V ~ 3.7V 1.1mA @ 3.3V -40°C ~ 85°C Surface Mount - - 20-TSSOP
DS1254YB-100 Analog Devices Inc./Maxim Integrated

DS1254YB-100

IC RTC PHANTOM CHIP PAR 168BGA

Analog Devices Inc./Maxim Integrated

2,130
RFQ
DS1254YB-100 Datasheet

Datasheet

- 168-BBGA Module Bag Obsolete Not Verified Phantom Time Chip Leap Year, NVSRAM 2MB HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 3V 7mA @ 3.3V 0°C ~ 70°C Surface Mount - - 168-BGA (40x40)
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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.