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
ISL12028IV27AZ Renesas Electronics Corporation

ISL12028IV27AZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

4,640
RFQ
ISL12028IV27AZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12028IV30AZ Renesas Electronics Corporation

ISL12028IV30AZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

2,115
RFQ
ISL12028IV30AZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12023IVZ Renesas Electronics Corporation

ISL12023IVZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

3,655
RFQ
ISL12023IVZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, SRAM 128B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 14µA ~ 15µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12027IVAZ Renesas Electronics Corporation

ISL12027IVAZ

IC RTC CLK/CALENDAR I2C 8TSSOP

Renesas Electronics Corporation

2,932
RFQ
ISL12027IVAZ Datasheet

Datasheet

- 8-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-TSSOP
ISL12027IV30AZ Renesas Electronics Corporation

ISL12027IV30AZ

IC RTC CLK/CALENDAR I2C 8TSSOP

Renesas Electronics Corporation

2,695
RFQ
ISL12027IV30AZ Datasheet

Datasheet

- 8-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-TSSOP
ISL12027IVZ Renesas Electronics Corporation

ISL12027IVZ

IC RTC CLK/CALENDAR I2C 8TSSOP

Renesas Electronics Corporation

3,680
RFQ
ISL12027IVZ Datasheet

Datasheet

- 8-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-TSSOP
ISL12024IVZ Renesas Electronics Corporation

ISL12024IVZ

IC RTC CLK/CALENDAR I2C 8TSSOP

Renesas Electronics Corporation

1,315
RFQ
ISL12024IVZ Datasheet

Datasheet

- 8-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Unique ID - 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-TSSOP
ISL12028IVAZ Renesas Electronics Corporation

ISL12028IVAZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

2,535
RFQ
ISL12028IVAZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12027IV27AZ Renesas Electronics Corporation

ISL12027IV27AZ

IC RTC CLK/CALENDAR I2C 8TSSOP

Renesas Electronics Corporation

3,730
RFQ
ISL12027IV27AZ Datasheet

Datasheet

- 8-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-TSSOP
ISL12028IVZ Renesas Electronics Corporation

ISL12028IVZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

2,044
RFQ
ISL12028IVZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12029IV27AZ Renesas Electronics Corporation

ISL12029IV27AZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

2,033
RFQ
ISL12029IV27AZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12029IV30AZ Renesas Electronics Corporation

ISL12029IV30AZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

3,032
RFQ
ISL12029IV30AZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12029IVAZ Renesas Electronics Corporation

ISL12029IVAZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

4,060
RFQ
ISL12029IVAZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12029IVZ Renesas Electronics Corporation

ISL12029IVZ

IC RTC CLK/CALENDAR I2C 14TSSOP

Renesas Electronics Corporation

2,206
RFQ
ISL12029IVZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12032IVZ Renesas Electronics Corporation

ISL12032IVZ

IC RTC EVENT REC I2C 14TSSOP

Renesas Electronics Corporation

1,852
RFQ
ISL12032IVZ Datasheet

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tube Obsolete Not Verified Time Event Recorder Alarm, SRAM, Trickle-Charger 128B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 18µA @ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
ISL12027IB30AZ Renesas Electronics Corporation

ISL12027IB30AZ

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

1,641
RFQ
ISL12027IB30AZ Datasheet

Datasheet

- 8-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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL12027IBAZ Renesas Electronics Corporation

ISL12027IBAZ

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

1,651
RFQ
ISL12027IBAZ Datasheet

Datasheet

- 8-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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL12027IB27AZ Renesas Electronics Corporation

ISL12027IB27AZ

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

2,331
RFQ
ISL12027IB27AZ Datasheet

Datasheet

- 8-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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL12025IBZ Renesas Electronics Corporation

ISL12025IBZ

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

1,705
RFQ
ISL12025IBZ Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Unique ID, 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL1218IBZ Renesas Electronics Corporation

ISL1218IBZ

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

4,529
RFQ
ISL1218IBZ Datasheet

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM 8B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 4µA ~ 6µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 8-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.