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
M48T58Y-70MH1E STMicroelectronics

M48T58Y-70MH1E

IC RTC CLK/CALENDAR PAR 28SOH

STMicroelectronics

2,890
RFQ
M48T58Y-70MH1E Datasheet

Datasheet

Timekeeper® 28-SOIC (0.337", 8.56mm Width) with SNAPHAT Sockets Tube Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 28-SOH
RX-4045NB:AAB EPSON

RX-4045NB:AAB

IC RTC CLK/CALENDAR SER 22SON

EPSON

2,212
RFQ
RX-4045NB:AAB Datasheet

Datasheet

RX-4045NB 22-LFDFN Strip Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD-dd 4-Wire Serial 1.7V ~ 5.5V - 1.2µA ~ 1.8µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 22-SON (6.3x4.8)
RX-4045NB:AAB PURE SN EPSON

RX-4045NB:AAB PURE SN

IC RTC CLK/CALENDAR SER 22SON

EPSON

1,391
RFQ
RX-4045NB:AAB PURE SN Datasheet

Datasheet

RX-4045NB 22-LFDFN Strip Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD-dd 4-Wire Serial 1.7V ~ 5.5V - 1.2µA ~ 1.8µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 22-SON (6.3x4.8)
RX-4045NBACB EPSON

RX-4045NBACB

IC RTC CLK/CALENDAR SER 22SON

EPSON

3,318
RFQ
RX-4045NBACB Datasheet

Datasheet

RX-4045NB 22-SMD, 20 Leads, Flat Leads Bulk Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD-dd 4-Wire Serial 1.7V ~ 5.5V 1.15V ~ 5.5V 1.2µA ~ 1.8µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 22-SON (6.3x4.8)
RTT21064 Raltron Electronics

RTT21064

XTAL OSC RTC 32.768KHZ SMD

Raltron Electronics

3,417
RFQ
RTT21064 Datasheet

Datasheet

- 10-SMD, No Lead Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, RAM - HH:MM:SS YY-MM-DD I2C 1.25V ~ 5.5V 1.2V ~ 5.5V 5µA ~ 7.8µA @ 1.2V ~ 5.5V -40°C ~ 85°C Surface Mount - - 10-SMD
RX-8803LC:UC3 PURE SN EPSON

RX-8803LC:UC3 PURE SN

IC RTC CLK/CALENDAR I2C 12VSOJ

EPSON

2,134
RFQ
RX-8803LC:UC3 PURE SN Datasheet

Datasheet

RX-8803LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD I2C 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
RX-4803LC:UB3 PURE SN EPSON

RX-4803LC:UB3 PURE SN

IC RTC CLK/CALENDAR SPI 12VSOJ

EPSON

3,419
RFQ
RX-4803LC:UB3 PURE SN Datasheet

Datasheet

RX-4803LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Active 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 - - 12-VSOJ
RX-8035LC:AA PURE SN EPSON

RX-8035LC:AA PURE SN

IC RTC EVENT REC I2C 12VSOJ

EPSON

1,692
RFQ
RX-8035LC:AA PURE SN Datasheet

Datasheet

RX-8035LC 12-TFSOJ (0.094", 2.40mm Width) Strip 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
DS17285S-3+T&R Analog Devices Inc./Maxim Integrated

DS17285S-3+T&R

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

1,206
RFQ
DS17285S-3+T&R Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active 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 - - 24-SOIC
DS17285S-5+T&R Analog Devices Inc./Maxim Integrated

DS17285S-5+T&R

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

3,954
RFQ
DS17285S-5+T&R Datasheet

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active 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 Surface Mount - - 24-SOIC
X1228S14Z-2.7T1 Renesas Electronics Corporation

X1228S14Z-2.7T1

IC RTC CLK/CALENDAR I2C 14SOIC

Renesas Electronics Corporation

3,151
RFQ
X1228S14Z-2.7T1 Datasheet

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) 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 0°C ~ 70°C Surface Mount - - 14-SOIC
RTC-8564NB:BB ROHS EPSON

RTC-8564NB:BB ROHS

IC RTC CLK/CALENDAR I2C 22SON

EPSON

2,894
RFQ
RTC-8564NB:BB ROHS Datasheet

Datasheet

- 22-LFDFN Strip Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD-dd I2C 1.8V ~ 5.5V - 0.7µA ~ 0.8µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 22-SON (6.3x4.8)
RX8804CE XAB EPSON

RX8804CE XAB

IC RTC CLK/CALENDAR I2C 10SMD

EPSON

4,017
RFQ
RX8804CE XAB Datasheet

Datasheet

RX8804CE 10-SMD, No Lead Bulk Active Not Verified Clock/Calendar Alarm, Watchdog Timer - HH:MM:SS YY-MM-DD I2C 1.6V ~ 5.5V 1.5V ~ 5.5V 1.5µA ~ 1.6µA @ 3V ~ 5V -40°C ~ 105°C (TA) Surface Mount - - 10-SMD
M48T59Y-70MH1E STMicroelectronics

M48T59Y-70MH1E

IC RTC CLK/CALENDAR PAR 28SOH

STMicroelectronics

2,406
RFQ
M48T59Y-70MH1E Datasheet

Datasheet

Timekeeper® 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tube Obsolete Not Verified Clock/Calendar Alarm, 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 Surface Mount - - 28-SOH
DS17885-5 Analog Devices Inc./Maxim Integrated

DS17885-5

IC RTC CLK/CALENDAR PAR 24DIP

Analog Devices Inc./Maxim Integrated

2,978
RFQ
DS17885-5 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 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Through Hole - - 24-PDIP
DS1284QN+ Analog Devices Inc./Maxim Integrated

DS1284QN+

IC RTC CLK/CALENDAR PAR 28PLCC

Analog Devices Inc./Maxim Integrated

2,675
RFQ
DS1284QN+ Datasheet

Datasheet

- 28-LCC (J-Lead) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer 50B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.4V ~ 3.5V 7mA @ 5V -40°C ~ 85°C Surface Mount - - 28-PLCC (11.51x11.51)
RX-4803SA:UA3 PURE SN EPSON

RX-4803SA:UA3 PURE SN

IC RTC CLK/CALENDAR SPI 14SOP

EPSON

3,438
RFQ
RX-4803SA:UA3 PURE SN Datasheet

Datasheet

RX-4803SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Active 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
RX-8803SA:UA3 PURE SN EPSON

RX-8803SA:UA3 PURE SN

IC RTC CLK/CALENDAR I2C 14SOP

EPSON

4,168
RFQ
RX-8803SA:UA3 PURE SN Datasheet

Datasheet

RX-8803SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD I2C 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
DS17885-3 Analog Devices Inc./Maxim Integrated

DS17885-3

IC RTC CLK/CALENDAR PAR 24DIP

Analog Devices Inc./Maxim Integrated

1,525
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
RX-8803LC:UC PURE SN EPSON

RX-8803LC:UC PURE SN

IC RTC CLK/CALENDAR I2C 12VSOJ

EPSON

2,121
RFQ
RX-8803LC:UC PURE SN Datasheet

Datasheet

RX-8803LC 12-TFSOJ (0.094", 2.40mm Width) Strip Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD I2C 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
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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.