NRF54LM20B

The nRF54LM20B is Nordic's flagship multiprotocol SoC, pairing a 128 MHz Arm Cortex-M33 with a 128 MHz Axon neural accelerator — the B variant's addition over the A variant — plus 2 MB of non-volatile memory, 512 KB of RAM and a 128 MHz RISC-V coprocessor for software-defined peripherals. The 2.4 GHz radio covers Bluetooth LE including Channel Sounding, Thread, Zigbee, Matter, NFC and a proprietary 4 Mbps mode, with +8 dBm transmit power in the chip-scale package, -96 dBm sensitivity at BLE 1 Mbps, and typical currents of 3.3 mA receive and 5.0 mA transmit at 0 dBm from 3 V; sleep currents run from 0.7 µA to 4.3 µA depending on retention. Arm TrustZone, a cryptographic engine and tamper detection protect connected products, and high-speed USB plus up to 66 GPIOs round out the interface set. Selection note: of the CSP98, CSP61 and QFN52 package options, only the CSP98 version is in production today, so design the footprint and your sourcing plan around CSP98 and treat the other packages as roadmap items. Parameters verified against Nordic Semiconductor documentation.