Low power MCUs go even lower with reduced current/MHz metrics

April 17, 2013 // By Paul Buckley
Renesas Electronics has developed the RL78/G10 Group of microcontrollers as low pin count versions of the RL78/G1x Series of microcontrollers, featuring low-power operation with on-chip flash memory capacities from 1 to 4 kB in 10-pin and 16-pin SSOP packages.

Renesas says these MCUs are suited to consumer products such as small appliances.  They inherit the features of the RL78 Family, such as lowpower consumption and the ability to reduce total system costs by taking advantage of the peripheral functions integrated with the MCU itself. They feature reduced operating current (46 µA/MHz – 20 MHz basic operation) by about 30% compared with Renesas’ existing RL78/G13 Group of MCUs (66 µA/MHz – 32 MHz basic operation), by improvements such as optimisation of the inner wiring. Package sizes down to 3.6 x 4.4 mm – allows the RL78/G10 MCUs to be retro-fitted for small consumer products.
The RL78/G10 group is suitable for low-power, low-cost consumer products such as electric toothbrushes with battery drive. The new product facilitates replacement of mechanical components and adding new intelligent features, such as power optimization, battery monitoring, and sensor management.

The accurate high-speed on-chip oscillator (OCO) allows reduced system cost. The integrated high-speed OCO incorporated in the new product eliminates the requirement for an external oscillator for many consumer electronic devices.
The new ultra low power consumption RL78/G10 Group reduces such a system’s power consumption by controlling the power IC. Renesas provides kit solutions with power ICs including Renesas’ RAA23021x Series.

Samples of the 10-pin SSOP of the RL78/G10 Group of MCUs are available now. Mass production of the RL78/G10 devices is scheduled to begin in June 2013 and is expected to reach a scale of 1,000,000 units per month in May 2014. Samples of the 16-pin SSOP devices will be available in the end of 2013.
Renesas Electronics Europe www.renesas.eu