Product Releases

Microcontroller Intelligently Switches Between Main and USB Supplies

Wed, 05/05/2010 - 10:17am

The MAXQ622 features an ultra-low stop-mode current (300nA, typ) and intelligent supply switching to extend battery life in portable consumer and medical applications.

Q622Maxim Integrated Products introduces the MAXQ622, a high-performance, 16-bit RISC microcontroller with an integrated USB transceiver. Designed for low-power applications, this microcontroller operates from either an external supply (1.7V to 3.6V) or directly from USB power. Intelligent supply monitoring enables the microcontroller to conserve power by actively switching from the main supply during periods of USB connectivity. To further extend battery life, the MAXQ622 consumes an ultra-low 300nA (typ) in stop-mode operation. These unique power-saving capabilities make the MAXQ622 ideal for remote controls, security systems, thermostats, blood pressure monitors, and a wide variety of other consumer and medical applications.

The MAXQ622 includes 128KB of flash memory, 6KB of data RAM, dual USART ports, dual SPI(TM) master/slave communication ports, an I2C port, an infrared (IR) module with carrier-frequency generation, and up to 56 general-purpose I/O pins. Additionally, it provides a secure memory-management unit (MMU) to prevent device cloning and unauthorized access to sensitive application code.

The MAXQ622 is available in a 64-pin LQFP package and as bare die (contact the factory for detailed information). Prices start at $2.09 (1000-up, FOB USA). The MAXQ612 is also available for those applications not needing USB capabilities.

Maxim provides complete software support with USB class drivers and application examples, making it easy to add USB functionality to embedded applications. An evaluation kit is available with an evaluation board and a PC-based integrated development environment (IDE), which provides a debugger, assembler/linker, time-limited version of the IAR C-compiler, and simulator. Additionally, Maxim's website offers many application notes and software examples to use with the MAXQ family of products (


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