EnerChip™ RTC CBC34813-M5C
The EnerChip RTC CBC34813-M5C combines a Real-Time Clock (RTC) and calendar optimized for low power applications with an integrated rechargeable solid state backup battery and all power management functions.
The EnerChip RTC ensures a seamless transition from main power to backup power in the event of power loss. The integrated power management circuit ensures thousands of charge-discharge cycles from the integrated EnerChip and manages battery charging, discharge cutoff, power switchover, and temperature compensation to maximize the service life of the device. The CBC34813 provides greater than 5 days of backup time in the event main power is interrupted. The integrated EnerChip recharges quickly, has extremely low self-discharge, is non-flammable, and RoHScompliant. The EnerChip is charged automatically anytime VDD is above 2.5V.
Data is transferred serially via an SPI-bus. Alarm and timer functions provide the option to generate a wake-up signal on an interrupt pin.
EnerChip RTC lasts the life of the system so you never have to change a battery. EnerChip RTC devices provide powerful single chip drop-in capabilities in the world’s smallest footprint.
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Features
- Ultra low power Real Time Clock with Integrated rechargeable EnerChip™ solid state battery, power-fail detect and automatic switchover, providing greater than 5 days (typical) of RTC backup
- 5mm x 5mm x 1.4mm QFN package is the smallest commercially available RTC having integrated backup power
- Temperature-compensated charge control
- Integrated EnerChip™ recharged at VDD > 2.5V
- SMT assembly – lead-free reflow solder tolerant
- Counters for hundredths, seconds, minutes, hours, date, month, year, century, and weekday based on a 32.768 kHz oscillator
- Automatic leap year calculation
- Alarm capability on all counters
- 2 general purpose outputs
- 64 bytes of RAM
- Advanced crystal calibration to ± 2 ppm
- Advanced RC calibration to ± 16 ppm
- Automatic calibration of RC oscillator to crystal oscillator
- SPI-bus (up to 400kHz)
- Eco-friendly, RoHS compliant – tested
Physical Properties
| Package size: | 5 mm x 5 mm |
| Operating temperature: | -10°C to +70°C |
| Storage temperature: | -40°C to +125°C |
Electrical Properties
| Output voltage: | 2.5V |
| Capacity (typical): | 5µAh |
| Recharge time to 80%: | 15 minutes |
| Charge/Discharge cycles: | >5000 to 10% discharge |
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 Timersusing only 35nA can be implemented with the CBC34813
- Wireless sensors and RFID tags and other powered, 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
- Power bridging to provide uninterruptible RTC function during exchange of main batteries.Time keeping applications
- Battery powered devices
- Metering
- High duration timers
- Daily alarms
- Low standby power applications
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