STMicroelectronics debuts ultra-efficient wireless MCU for smart remote controls

Press Release, 20 November 2025

Geneva-based STMicroelectronics (ST) has rolled out its new wireless microcontroller, the STM32WL3R, aimed at revolutionizing battery-powered remote control units across smart homes and building automation. Built from the existing STM32WL3 line, the device offers an integrated sub-GHz RF transceiver, advanced power-saving modes and six dedicated wake-up pins — enabling exceptional energy efficiency and flexibility for designers.

Designed in collaboration with automation specialist Somfy Group, the chip supports multiple frequency bands including 315 MHz (North America), 850 MHz and 950 MHz (global), making it globally deployable in wireless remotes like garage door openers or motorized blinds. ST reports ultra-low current draw — just 10 mA at 10 dBm output — with the deep-sleep mode consuming as little as 450 nA (and shutdown mode at 14 nA), while retaining application context via 16 KB of RAM.

In a compact QFN32 (5 × 5 mm) footprint, the STM32WL3R is already in production and available through ST’s e-store and authorised distributors. Early pricing starts at approximately US $1.2654 for bulk volumes. With the rise of smart devices and the Internet of Things, this MCU addresses a pressing need for ultra-low-power wireless control where battery longevity, global frequencies, and flexible design matter.

Source: ST News, Compiled using AI