Silicon Laboratories’ new C8051F91x/0x MCU family is designed to increase battery life in portable designs and other power-sensitive embedded systems. The new MCUs are suitable for a wide range of applications where low power consumption is critical, such as smart meters, RFID tags, personal medical devices, sensor interfaces, energy harvesting, home security systems, and smoke and fire detectors.
The new MCUs consume just 160 μA per MHz in active mode, which saves power when the system is running. They also consume low current in sleep mode, either with an active realtime clock and brown-out detect circuit (300 nA) or without a realtime clock or brown-out detect circuit operating (10 nA) while maintaining full RAM retention. The F91x/0x family also wakes up in a very short amount of time (less than two microseconds), minimising the amount of time spent in an energy-wasting state.
The F91x/0x MCUs expand Silicon Labs’ C8051F9xx MCU family by offering cost-effective 8 KB and 16 KB Flash memory options while providing 25 MIPS core performance and advanced analog peripherals such as an on-chip 12-bit analog-to-digital (ADC) converter with an autonomous power-saving burst mode. The MCUs are software and footprint compatible, enabling developers to use one board layout and code set while migrating to lower-cost designs.
The F91x/0x MCUs integrate an efficient DC-DC converter designed to operate down to 0,9 V, enabling low-cost AA or AAA battery operation. In addition, the DC-DC converter can supply up to 65 mW of output power to drive other system components such as LEDs, RF transceivers and sensors, creating a true single-battery system solution.
The new microcontrollers can be paired with Silicon Labs’ CP240x liquid crystal display (LCD) drivers for power-sensitive designs that require LCDs such as thermostat displays, home security systems and personal medical devices.
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