Cymbet has introduced the CBC921 Power Management / Real-Time Clock (PMRTC). The CBC921 PMRTC includes an ultra-low power timer, integrated power switch, and battery management functions.
Key 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
- Backup battery charger controls 4.1V rechargeable micro-batteries and 3.2V rechargeable coin cells and supercapacitors; no off-chip components required for battery charger
- Buck charge pump supply extends run time on
- backup battery:
- 20nA RTC using internal RC oscillator
- 50nA RTC using crystal oscillator
- Integrated power switch reduces system power consumption
- Alarm capability on all counters
- Configurable multi-use outputs for interrupts, output clock, and managing external devices
- 64 bytes of RAM
- Internal temperature measurement with 10-bit ADC enables oscillator temperature compensation
- Advanced crystal calibration to ± 1 ppm
- Ultra-low Iq VIN POR circuit (< 25nA)
- Fixed indicators for PGOOD, charging current on, and charging disabled
- Temperature range -40°C to +85°C
- Serial communication: I2C-bus and SPI-bus options
- 3mm x 3mm x 0.55mm 16L QFN package
Applications
- Power bridging to provide uninterruptible RTC function during exchange of main batteries
- Consumer appliances that have real-time clocks; switchover power from main supply to backup battery
- Ultra-low power timer using only 20nA
- Wireless sensors and RFID tags and other low duty cycle applications
- Business and industrial systems such as: network routers, point-of-sale terminals, single-board computers, test equipment, multi-function printers, industrial controllers, and utility meters
- Reliable system timekeeping
- Battery-powered devices
- Internet of Things
- Portable/mobile devices
- Daily alarms
In addition, the EVAL-14 evaluation board supports CBC921 PMRTC application development.
The CBC92132C and CBC92141C PMRTC part numbers are now sampling. Contact Cymbet for more information: Cymbet Support .
