Epson – New Low-Current Real-Time Clock Module Enables Supercapacitors to Replace Batteries in Electronic Equipment

Epson’s RX6110SA enables the reduction of hazardous substances by allowing electronic device makers to replace batteries with supercapacitors. With a 0.33F supercapacitor, Epson’s RX6110SA can operate for 16 weeks. Epson’s RX6110SA achieves an operating current one half of leading competitors by employing special low-power circuit design techniques and Epson’s unique low-leakage IC process technology. Compared to microcontroller implementations, Epson’s RX6110SA can operate eight times longer.

The RX6110SA also includes a diode-less power-supply switching circuit which allows it to operate and charge from power supplies ranging from 5 V down to as low as 1.1V. By operating at a lower voltage than competition, Epson’s RX6110SA further extends battery life.

In addition to keeping time, real-time clocks are used to log power-loss events and save system state when power is lost. Epson’s RX6110SA offers a rich feature set to support these needs, including a 32.768 kHz output, alarms and timers, and RAM. The RX6110SA supports both SPI-bus and I2C-bus interfaces.

Main specifications:

  • Model number: RX6110SA
  • External dimensions: 10.1 × 7.4 × 3.2t (max.) mm
  • Timekeeper voltage range: 1.1 V to 5.5 V
  • Operating temperature range: -40°C to +85°C
  • Current consumption: 130 nA (Typ.) / 250 nA (Max.) (3.0 V during operation)
  • Initial Frequency Deviation: 5.0 ± 23.0 × 10-6(Max.)
  • Interface: SPI-bus and I2C-bus (selectable)
  • Functions: Clock, calendar, alarm, long-term timers, frequency output, RAM, etc.
See also

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