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
MCP795B11T-I/SL Microchip Technology

MCP795B11T-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

3,722
RFQ
MCP795B11T-I/SL Datasheet

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
MCP795B12T-I/SL Microchip Technology

MCP795B12T-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

4,672
RFQ
MCP795B12T-I/SL Datasheet

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
MCP795B20T-I/SL Microchip Technology

MCP795B20T-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

3,193
RFQ
MCP795B20T-I/SL Datasheet

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
PCF8564ACX9/B/1,02 NXP USA Inc.

PCF8564ACX9/B/1,02

IC RTC CLOCK/CALENDAR I2C DIE

NXP USA Inc.

4,953
RFQ
PCF8564ACX9/B/1,02 Datasheet

Datasheet

- Die Tape & Reel (TR) Obsolete 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
M41T81M6E STMicroelectronics

M41T81M6E

IC RTC CLK/CALENDAR I2C 8SOIC

STMicroelectronics

2,183
RFQ
M41T81M6E Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Watchdog Timer - HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2V ~ 5.5V 2.5V ~ 3.5V 100µA @ 2V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
PT7C433833AUEX Diodes Incorporated

PT7C433833AUEX

IC RTC CLK/CAL I2C 8MSOP TR 2.5K

Diodes Incorporated

3,058
RFQ
PT7C433833AUEX Datasheet

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.5V ~ 3.7V 125µA @ 2.7V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-MSOP
M41T56M6E STMicroelectronics

M41T56M6E

IC RTC CLK/CALENDAR I2C 8SOIC

STMicroelectronics

3,741
RFQ
M41T56M6E Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM 56B HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2.5V ~ 3.5V 100µA (Typ) @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
V3021SO8B+ EM Microelectronic

V3021SO8B+

IC RTC CLK/CAL 3 WIRE SER 8-SOIC

EM Microelectronic

4,531
RFQ
V3021SO8B+ Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Last Time Buy - Clock/Calendar Leap Year, RAM 1B HH:MM:SS YY-MM-DD-dd 3-Wire Serial 2V ~ 5.5V - 1.8µA @ 5V -40°C ~ 85°C (TA) Surface Mount - - 8-SOIC
V3020SO8B+ EM Microelectronic

V3020SO8B+

IC RTC CLK/CALENDAR SER 8SOIC

EM Microelectronic

2,434
RFQ

-

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Last Time Buy Not Verified Clock/Calendar Alarm, Leap Year, RAM 1B HH:MM:SS YY-MM-DD-dd 3-Wire Serial 1.2V ~ 5.5V - 4µA ~ 7µA @ 3V ~ 5V -40°C ~ 85°C (TA) Surface Mount - - 8-SOIC
MCP795W10T-I/SL Microchip Technology

MCP795W10T-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

1,577
RFQ
MCP795W10T-I/SL Datasheet

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, 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-SOIC
MCP795B11T-I/ST Microchip Technology

MCP795B11T-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

3,582
RFQ
MCP795B11T-I/ST Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
MCP795B12T-I/ST Microchip Technology

MCP795B12T-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

4,182
RFQ
MCP795B12T-I/ST Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
MCP795B20T-I/ST Microchip Technology

MCP795B20T-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

1,164
RFQ
MCP795B20T-I/ST Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
DS1307Z/T&R Analog Devices Inc./Maxim Integrated

DS1307Z/T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

4,274
RFQ
DS1307Z/T&R Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2V ~ 3.5V 200µA @ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
S-35391A-I8T1U ABLIC Inc.

S-35391A-I8T1U

IC RTC CLK/CALENDAR I2C SNT8A

ABLIC Inc.

4,879
RFQ
S-35391A-I8T1U Datasheet

Datasheet

- 8-SMD, Flat Leads Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 5.5V - 14µA ~ 30µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - SNT-8A
RS5C372B-E2-F Nisshinbo Micro Devices Inc.

RS5C372B-E2-F

IC RTC CLK/CALENDAR I2C 8SSOP

Nisshinbo Micro Devices Inc.

2,574
RFQ
RS5C372B-E2-F Datasheet

Datasheet

- 8-LSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.7V ~ 6V - 0.9µA ~ 2µA @ 3V ~ 6V -40°C ~ 85°C Surface Mount - - 8-SSOP
RV5C387A-E2-F Nisshinbo Micro Devices Inc.

RV5C387A-E2-F

IC RTC CLK/CALENDAR I2C 10SSOP

Nisshinbo Micro Devices Inc.

1,231
RFQ
RV5C387A-E2-F Datasheet

Datasheet

- 10-LFSOP, 10-MSOP (0.110", 2.80mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2V ~ 5.5V - 0.8µA @ 3V -40°C ~ 85°C Surface Mount - - 10-SSOP-G
MCP795B21T-I/SL Microchip Technology

MCP795B21T-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

1,437
RFQ
MCP795B21T-I/SL Datasheet

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
MCP795B22T-I/SL Microchip Technology

MCP795B22T-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

2,490
RFQ
MCP795B22T-I/SL Datasheet

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
S-35390A-I8T1G ABLIC Inc.

S-35390A-I8T1G

IC RTC CLK/CALENDAR I2C SNT8A

ABLIC Inc.

3,139
RFQ
S-35390A-I8T1G Datasheet

Datasheet

- 8-SMD, Flat Leads Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 5.5V - 0.93µA ~ 1.1µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - SNT-8A
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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.