IC RF TxRx + MCU General ISM < 1GHz Z-Wave® 863MHz ~ 870MHz, 902MHz ~ 928MHz 48-VFQFN Exposed Pad
The Silicon Labs EFR32ZG23B020F512IM48-B is a 2.4 GHz–independent (sub-GHz) RF Tx/Rx + MCU SoC optimized for Z-Wave smart home and IoT mesh networks. It integrates computing, RF communication, and security features in a compact 48-pin QFN package.
It is part of the EFR32ZG23 Series 2 platform, which focuses on low-power, secure, long-range wireless connectivity for smart home, building automation, and industrial IoT devices.
Key Features
MCU Core & Memory
ARM Cortex-M33 core (up to ~80 MHz)
512 kB Flash memory
64 kB RAM
RF / Wireless
Z-Wave protocol support (mesh + long-range)
Frequency bands:
863–870 MHz (EU)
902–928 MHz (US)
Max data rate: up to 100 kbps
Output power: up to +20 dBm
High sensitivity: around –110 dBm
Security
Secure Vault™ high-level security subsystem
Hardware cryptography support
Secure boot and key protection (IoT-grade security)
Low Power Performance
Ultra-low receive and transmit currents (single-digit mA RX, tens of mA TX)
Designed for battery-powered IoT nodes
Peripherals & Interfaces
GPIO (up to ~31 pins depending on variant)
ADC, I2C, SPI, UART, I2S, IrDA
Flexible digital/analog peripheral integration
Package & Electrical
48-pin QFN (6 × 6 mm)
Supply voltage: 1.71 V – 3.8 V
Industrial temperature range: –40°C to +125°C
