Design Files
2 design files
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Symbols and Footprints
PCF2123BS-1-HVQFN16-CAD Symbol and PCB Footprint – BXL File
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Symbols and Footprints
PCF2123BS_1-HVQFN16-CAD Symbol and PCB Footprint – BXL File
SPI Real-Time Clock/Calendar
PCF2123 Receive alerts
The PCF2123 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power applications. Data is transferred serially via a Serial Peripheral Interface (SPI-bus) with a maximum data rate of 6.25 Mbit/s. An alarm and timer function is also available providing the possibility to generate a wake-up signal on an interrupt pin. An offset register allows fine tuning of the clock.
Product Details
Block Diagram
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Features
Key Features
- Real time clock provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
- Low backup current while running: typical 100 nA at VDD = 2.0 V and Tamb = 25 ℃
- Resolution: seconds to years
- Watchdog functionality
- Freely programmable timer and alarm with interrupt capability
- Clock operating voltage: 1.1 V to 5.5 V
- 3 line SPI-bus with separate, but combinable data input and output
- Serial interface at VDD = 1.8 V to 5.5 V
- 1 second or 1 minute interrupt output
- Integrated oscillator load capacitors for CL = 7 pF
- Internal Power-On Reset (POR)
- Open-drain interrupt and clock output pins
- Programmable offset register for frequency adjustment
Product Longevity Program
- This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The PCF2123BS/1 and PCF2123TS/1 are included in the 15-year program
Documentation
Quick reference to our documentation types.
1-5 of 12 documents
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Data Sheet
SPI Real time clock/calendar
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Application Note
ESD and EMC sensitivity of IC
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Application Note
Handling bare die
Design Resources
Hardware
2 hardware offerings
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Evaluation and Development BoardsDemoboard for the SPI-bus RTC PCF2123
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Complete SolutionNXP® Rapid IoT Prototyping Kit
Engineering Services
To get further assistance directly from NXP, please see our Engineering Services.
2 engineering services
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Independent Design House (IDH)
Hardware Design Services
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Independent Design House (IDH)
Embedded Software Design
To find a complete list of our partners that support this product, please see our Partner Marketplace.