CBC921
CBC921 is Real-Time Clock/Calendar manufactured by Cymbet.
Preliminary
CBC921 PMRTC NPerwoduct!
Data Brief
Real-Time Clock/Calendar with Power Manager and Battery Charger
Features
- Ultra-low power Real-Time Clock (RTC) with power-fail detect and battery management
- Low power timer and power manager extend run time in battery-powered systems
- Controls 4.1V rechargeable micro-batteries and 3.2V rechargeable coin cells and supercaps; no off-chip ponents required for battery charger
- Buck charge pump supply extends backup battery life:
20n A RTC using internal RC oscillator 50n A RTC using crystal oscillator
- Counters for hundredths, seconds, minutes, hours, date, month, year, century, and weekdays based on a 32.768KHz crystal oscillator or internal RC oscillator
- Automatic leap year calculation
- Alarm capability on all counters
- Two configurable multi-use outputs for interrupts, output clock, and managing sleep mode of external devices
- 64 bytes of RAM
- Internal temperature measurement with 10-bit ADC enables oscillator temperature pensation
- Advanced crystal calibration to ± 1 ppm
- Ultra-low Iq VIN POR circuit (< 25n A)
- Fixed indicators for PGOOD, charging current on, and charging disabled
- Temperature range -40°C to +85°C
Applications
- Power bridging to provide uninterruptible RTC function during exchange of main batteries.
- Consumer appliances that have real-time clocks; provides switchover power from main supply to backup battery.
- Ultra-Low Power Timer using only 20n A
- Wireless sensors and RFID tags and other powered, low duty cycle applications.
- Business and industrial systems such as: network routers, point-of-sale terminals, singleboard puters, test equipment, multi-function printers, industrial controllers, and utility meters.
- Reliable system timekeeping
- Battery-powered devices
- Internet of Things, portable devices
- Daily...
