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Tiny Real-Time Clock/Calendar with 64 B RAM, Alarm Function, Battery Switch-Over Time Stamp Input, and I²C-Bus
PCF85363A
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The PCF85363A is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption and with automatic switching to battery on main power loss. The RTC can also be configured as a stop-watch (elapsed time counter). Three time log registers triggered from battery switch-over as well as input driven events. Featuring clock output and two independent interrupt signals, two alarms, I²C interface and quartz crystal calibration, 64 byte battery backed-up RAM.
Product Details
Features
- UL Recognized Component (PCF85363ATL)
- Provides year, month, day, weekday, hours, minutes, seconds and 100th seconds based on a 32.768 kHz quartz crystal
- Stop-watch mode for elapsed time counting. From 100th seconds to 999999 hours
- Two independent alarms
- Battery back-up circuit
- WatchDog timer
- Three timestamp registers
- Two independent interrupt generators plus predefined interrupts at every second, minute, or hour
- 64 byte battery backed-up RAM
- Frequency adjustment via programmable offset register
- Clock operating voltage: 0.9 V to 5.5 V
- Low current; typical 0.28 μA at VDD= 3.0 V and Tamb= 25 °C
- 400 kHz two-line I²C-bus interface (at VDD= 1.8 V to 5.5 V)
- Programmable clock output for peripheral devices (32.768 kHz, 16.384 kHz, 8.192 kHz, 4.096 kHz, 2.048 kHz, 1.024 kHz, and 1 Hz)
- Configurable oscillator circuit for a wide variety of quartzes: CL= 6 pF, CL= 7 pF, and CL= 12.5 pF
Target Applications
- Elapsed time counter
- Network powered devices
- Printers and copiers
- Battery backed up systems
- Digital voice recorders
- Data loggers
- Mobile equipment
- White goods
- Digital cameras
- Accurate high duration timer
Design Resources
Design Files
2 design files
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Symbols and Footprints
PCF85363ATT1-A-TSSOP8-CAD Symbol and PCB Footprint – BXL File
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Symbols and Footprints
PCF85363ATT1_A-TSSOP8-CAD Symbol and PCB Footprint – BXL File
Hardware
1 hardware offering
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Evaluation and Development BoardsPC evaluation board for the I²C-bus RTC PCF85363A
Engineering Services
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3 engineering services
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Independent Design House (IDH)
Embedded Software Design
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Independent Design House (IDH)
Hardware Design Services
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Independent Design House (IDH)
NFC hardware design review and consulting
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