em | bleu

True Ultra-Low-Power Bluetooth® for Always-On Sensors

EM9305 (em | bleu) is a versatile, ultra-low-power Bluetooth® Low Energy 5.4 solution built for the smallest connected devices and the longest battery life. Available as a complete System-on-Chip (SoC) or as a companion IC to an ASIC or host MCU, EM9305 lets you run custom applications on an efficient 32-bit ARC EM7D processor while delivering robust RF performance and an exceptionally small footprint.

Designed for lightweight, always-ready sensors and wearables, EM9305 combines true ultra-low-power operation with a sophisticated on-chip power system that supports coin/button cells, standard 1.5V/3V batteries, direct 5V USB power, and even energy harvesting thanks to operation down to ~1.1V.

With flexible serial interfaces and a minimal external component count, it enables cost-effective designs with a small BOM, without compromising range, reliability, or performance in challenging RF environments.

Key highlights

• Tiny footprint, flexible packaging: WLCSP23 1.8 × 1.8 mm, QFN-28 4 × 4 mm, and bare die/wafer options for space-constrained designs

• Bluetooth® Core 5.4 qualified: LE 2M, LE Coded (Long Range), Direction Finding, and support for modern advertising and application profiles

• Efficient processing for custom apps: ARC EM7D 32-bit MCU with DMA and cache, plus DSP/FPU support for audio and sensor-fusion workloads

• Optimized memory architecture: 512 kB flash, retainable RAM with fine-grained retention control, and ROM resources for secure boot and system functions

• Advanced power management: Step-up/down DC-DC across ~1.1–3.6V battery ranges, optional low-BOM operating modes, and direct 5V USB powering

• High-performance 2.4 GHz RF: Strong sensitivity and programmable TX power up to +10 dBm for reliable links in noisy environments and difficult enclosures

• Security built-in: Hardware AES-128, true random number generation, ECC-based key capabilities, secure containers, and lifecycle management

• Versatile connectivity: Low-power SPI, I²C, I²S/TDM, UART, ADC, and USB connectivity options for sensors, displays, touch, and host interfaces

Typical application areas

Health & wellness, sport & fitness, smart home sensors, retail ESL, asset tracking and direction finding, computer peripherals, industrial/agriculture sensing, automotive and transport.