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
M48T35Y-70PC1 STMicroelectronics

M48T35Y-70PC1

IC RTC CLK/CALENDAR PAR 28DIP

STMicroelectronics

2,073
RFQ
M48T35Y-70PC1 Datasheet

Datasheet

Timekeeper® 28-DIP Module (0.600", 15.24mm) Tube Active Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 2mA @ 4.75V ~ 5.5V 0°C ~ 70°C Through Hole - - 28-PCDIP, CAPHAT®
DP8570AV/NOPB Texas Instruments

DP8570AV/NOPB

IC RTC TIMER PERIPH PAR 28PLCC

Texas Instruments

3,369
RFQ
DP8570AV/NOPB Datasheet

Datasheet

- 28-LCC (J-Lead) Tube 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)
DS1248Y-70IND+ Analog Devices Inc./Maxim Integrated

DS1248Y-70IND+

IC RTC PHANTOM CHIP PAR 32EDIP

Analog Devices Inc./Maxim Integrated

1,626
RFQ
DS1248Y-70IND+ Datasheet

Datasheet

- 32-DIP Module (0.600", 15.24mm) Tube Active Not Verified Phantom Time Chip NVSRAM 128KB HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 10mA @ 5V -40°C ~ 85°C Through Hole - - 32-EDIP
R2061L01-E2 Nisshinbo Micro Devices Inc.

R2061L01-E2

IC RTC CLK/CALENDAR SER 16QFN

Nisshinbo Micro Devices Inc.

1,025
RFQ
R2061L01-E2 Datasheet

Datasheet

- 16-XFQFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2.34V ~ 5.5V - 1µA @ 3V -40°C ~ 85°C Surface Mount - - QFN023023-16
R2223T-E2-F Nisshinbo Micro Devices Inc.

R2223T-E2-F

IC RTC CLK/CALENDAR I2C 10TSSOP

Nisshinbo Micro Devices Inc.

3,247
RFQ
R2223T-E2-F Datasheet

Datasheet

- 10-VFSOP, 10-MSOP (0.110", 2.80mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, RAM - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.5V ~ 5.5V - 0.9µA @ 3V -40°C ~ 85°C Surface Mount - - 10-TSSOPG
DS1685EN-5+ Analog Devices Inc./Maxim Integrated

DS1685EN-5+

IC RTC CLK/CALENDAR PAR 24TSSOP

Analog Devices Inc./Maxim Integrated

4,160
RFQ
DS1685EN-5+ Datasheet

Datasheet

- 24-TSSOP (0.173", 4.40mm Width) Tube Active 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-TSSOP
DS1672U-3+ Analog Devices Inc./Maxim Integrated

DS1672U-3+

IC RTC BINARY COUNTER I2C 8UMAX

Analog Devices Inc./Maxim Integrated

3,044
RFQ
DS1672U-3+ Datasheet

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Active Not Verified Binary Counter Trickle-Charger - Binary Binary I2C, 2-Wire Serial 2.7V ~ 3.3V 1.3V ~ 3.63V 500µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
M48T18-150PC1 STMicroelectronics

M48T18-150PC1

IC RTC CLK/CALENDAR PAR 28DIP

STMicroelectronics

2,059
RFQ
M48T18-150PC1 Datasheet

Datasheet

Timekeeper® 28-DIP Module (0.600", 15.24mm) Tube Active Not Verified Clock/Calendar Leap Year, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Through Hole - - 28-PCDIP, CAPHAT®
DS1315N-5+ Analog Devices Inc./Maxim Integrated

DS1315N-5+

IC RTC PHANTOM CHIP PAR 16DIP

Analog Devices Inc./Maxim Integrated

4,818
RFQ
DS1315N-5+ Datasheet

Datasheet

- 16-DIP (0.300", 7.62mm) 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 -40°C ~ 85°C Through Hole - - 16-PDIP
MAX31342EWA+T Analog Devices Inc./Maxim Integrated

MAX31342EWA+T

IC RTC CLK/CALENDAR I2C 8WLP

Analog Devices Inc./Maxim Integrated

4,911
RFQ
MAX31342EWA+T Datasheet

Datasheet

- 8-WFBGA, WLBGA 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 1.6V ~ 3.6V - 0.33µA @ 3V -40°C ~ 85°C Surface Mount - - 8-WLP (.97x1.97)
MAX31331TETB+ Analog Devices Inc./Maxim Integrated

MAX31331TETB+

ULTRA-LOW POWER 12C REAL TIME CL

Analog Devices Inc./Maxim Integrated

1,103
RFQ
MAX31331TETB+ Datasheet

Datasheet

- 10-WFDFN Exposed Pad Tray Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger 32B HH:MM:SS (12/24 hr) YY-MM-DD I2C 1.1V ~ 5.5V 1.1V ~ 5.5V 0.65µA ~ 0.7µA @ 1.1V ~ 5.5V -40°C ~ 85°C (TA) Surface Mount - - 10-TDFN (3x3)
MAX31329NELB+ Analog Devices Inc./Maxim Integrated

MAX31329NELB+

INTEGRATED RC17 W/ NDK CRYSTAL

Analog Devices Inc./Maxim Integrated

1,784
RFQ
MAX31329NELB+ Datasheet

Datasheet

- 10-LLGA Tray Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C 1.6V ~ 5.5V 1.6V ~ 5.5V 0.5µA ~ 0.7µA @ 1.6V ~ 5.5V -40°C ~ 85°C Surface Mount - - 10-LGA (5x5)
MAX31328NELB+T Analog Devices Inc./Maxim Integrated

MAX31328NELB+T

INTEGRATED DS3231SN W/ NDK CRYST

Analog Devices Inc./Maxim Integrated

4,608
RFQ
MAX31328NELB+T Datasheet

Datasheet

- 10-LLGA Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, Square Wave Output, TCXO/Crystal - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C 2.3V ~ 5.5V 2.3V ~ 5.5V 3µA ~ 3.5µA @ 3V ~ 5.5V -40°C ~ 85°C (TA) Surface Mount - - 10-LGA (5x5)
DS1685Q-5+ Analog Devices Inc./Maxim Integrated

DS1685Q-5+

IC RTC CLK/CALENDAR PAR 28PLCC

Analog Devices Inc./Maxim Integrated

4,691
RFQ
DS1685Q-5+ Datasheet

Datasheet

- 28-LCC (J-Lead) Tube Active 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 - - 28-PLCC (11.51x11.51)
M48T08-150PC1 STMicroelectronics

M48T08-150PC1

IC RTC CLK/CALENDAR PAR 28DIP

STMicroelectronics

4,629
RFQ
M48T08-150PC1 Datasheet

Datasheet

Timekeeper® 28-DIP Module (0.600", 15.24mm) Tube Active Not Verified Clock/Calendar Leap Year, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.75V ~ 5.5V - 3mA @ 4.7V ~ 5.5V 0°C ~ 70°C Through Hole - - 28-PCDIP, CAPHAT®
PCF8564AU/5GB/1,01 NXP USA Inc.

PCF8564AU/5GB/1,01

IC RTC CLOCK/CALENDAR I2C DIE

NXP USA Inc.

4,074
RFQ
PCF8564AU/5GB/1,01 Datasheet

Datasheet

- Die Bulk Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 5.5V - 0.6µA ~ 0.75µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - Die
PCF8564AU/5BB/1,01 NXP USA Inc.

PCF8564AU/5BB/1,01

IC RTC CLOCK/CALENDAR I2C DIE

NXP USA Inc.

1,485
RFQ
PCF8564AU/5BB/1,01 Datasheet

Datasheet

- Die Bulk Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 5.5V - 0.6µA ~ 0.75µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - Die
PT7C4563BUEX Diodes Incorporated

PT7C4563BUEX

IC RTC I2C SER 8MSOP T&R 2.5K

Diodes Incorporated

2,201
RFQ
PT7C4563BUEX Datasheet

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 5.5V - 0.65µA ~ 0.85µA @ 3V ~ 5V -40°C ~ 85°C (TA) Surface Mount - - 8-MSOP
PCF2123U/12HA/1,00 NXP USA Inc.

PCF2123U/12HA/1,00

IC RTC CLOCK/CALENDAR SPI DIE

NXP USA Inc.

1,550
RFQ
PCF2123U/12HA/1,00 Datasheet

Datasheet

- Die Bulk Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 1.6V ~ 5.5V - 0.33µA ~ 0.38µA @ 2V ~ 5V -40°C ~ 85°C - - - Die
PCF8564AU/10AB/1,0 NXP USA Inc.

PCF8564AU/10AB/1,0

IC RTC CLOCK/CALENDAR I2C DIE

NXP USA Inc.

4,149
RFQ

-

- Die Bulk Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 5.5V - 0.6µA ~ 0.75µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - Die
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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.