STMicroelectronics STM32WL33CCV7ATR

Overview

STM32WL33CCV7ATR from STMicroelectronics is an ultra-low-power, multiprotocol sub-1 GHz wireless system-on-chip integrating an Arm® Cortex®-M0+ core (64 MHz), 256-Kbyte flash, 32-Kbyte SRAM, and a fully integrated RF transceiver supporting 2(G)FSK/4(G)FSK/ASK/OOK/D-BPSK modulation across 159–958 MHz bands with +20 dBm TX power and -132 dBm RX sensitivity at 300 bit/s (433 MHz OOK). It targets battery-powered LPWAN edge nodes in industrial metering and asset tracking.

For engineers reviewing the STM32WL33CCV7ATR datasheet, STM32WL33CCV7ATR pinout, STM32WL33CCV7ATR application, or STM32WL33CCV7ATR equivalent, key selection criteria include verified sub-GHz RF performance across ETSI/FCC/ARIB bands, autonomous LPAWUR wakeup capability (-54 dBm sensitivity, 4 µA), dual-bank SRAM retention in Deepstop mode, SMPS+BOF power architecture, and hardware AES-128/TRNG security co-processor.

Technical Context

The device implements a tightly coupled SoC architecture where the Cortex-M0+ core shares AHB bus matrix access with the RF subsystem and DMA controller-enabling concurrent protocol stack execution and radio operations without CPU intervention. Its RF front-end uses low-IF RX and direct-modulation TX with programmable PA topologies (TX/TXHP modes) and full I/Q data access for custom waveform synthesis.

Power management integrates a configurable SMPS (1.2–2.4 V output), bypass-on-the-fly (static/dynamic), and three ultra-low-power modes: Shutdown (14 nA), Deepstop (960 nA with SRAM0 retention), and WFI (1.3 mA @ HSE). The LPAWUR operates autonomously on 32 kHz clock (LSI or LSE) to wake the SoC from Deepstop using Manchester-encoded OOK frames with 40-bit sync + 8-bit 0x99 frame sync + 56-bit payload + 16-bit CRC.

Key Specifications

Pinout & Package

VFQFPN48 package (6 × 6 mm, 0.4 mm pitch), RoHS-compliant ECOPACK2, with 32 GPIOs (all retention-capable), dedicated RF I/O (ANT, RFIO), and dual power domains (VDD/VDDIO, VDD12).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar sub-GHz wireless MCU applications.

Compared with SX1280+STM32L0 and CC1312R7, the STM32WL33CCV7ATR delivers superior integration density, broader modulation support (DSSS/I/Q), and industry-leading LPAWUR autonomy-reducing system-level power design complexity and certification effort for global LPWAN deployments.

Availability

STM32WL33CCV7ATR is available at Aetrix Electronics and suitable for asset tracking, industrial monitoring, and smart home alarm systems requiring stable component supply, long-term lifecycle assurance, and ETSI/FCC/ARIB regulatory compliance out-of-box.

Supply support for STM32WL33CCV7ATR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive semiconductors since 1987.

The STM32WL33xx series is part of ST's ultra-low-power wireless MCU product line, engineered specifically for battery-operated LPWAN endpoints needing global RF certification, hardware security, and minimal bill-of-materials in constrained industrial and utility metering applications.

FAQ

What frequency bands does the STM32WL33CCV7ATR support, and are they certified for global use?

The STM32WL33CCV7ATR supports 159–185 MHz, 413–479 MHz, and 826–958 MHz sub-GHz bands. It is pre-certified for ETSI EN 300 220 (Europe), FCC Part 15/90 (USA), and ARIB STD-T67/T108 (Japan), enabling immediate deployment in utility metering, asset tracking, and building automation across all major regions without additional RF testing.

How does the LPAWUR function, and what is its minimum detectable signal level?

The LPAWUR is a dedicated OOK receiver operating at -54 dBm sensitivity with 4 µA quiescent current. It uses a fixed Manchester-encoded frame format (40-bit sync + 0x99 frame sync + 56-bit payload + 16-bit CRC) and wakes the full SoC from Deepstop mode within 50 µs. It requires only a 32 kHz clock source (LSI or LSE) and no CPU involvement.

Can the STM32WL33CCV7ATR support both proprietary and standardized protocols like W-MBUS and MiOTY?

Yes-the integrated RF subsystem supports 2(G)FSK, 4(G)FSK, OOK, ASK, D-BPSK, and DSSS modulation schemes with programmable air data rates (0.1–600 kbit/s) and full I/Q data access. ST provides certified protocol stacks for W-MBUS (EN 13757-4), MiOTY, Sigfox, KNX-RF, and IEEE 802.15.4g, all running natively on the M0+ core.

What power optimization features enable multi-year battery life in sensor applications?

Key features include 14 nA Shutdown mode, 960 nA Deepstop mode with SRAM0 retention, 1.3 mA WFI current (HSE active), SMPS with bypass-on-the-fly to eliminate switching noise during RX, and autonomous LPAWUR eliminating polling. Combined with 21 µA/MHz dynamic core consumption and optimized RF power states (4 mA RX, 78 mA TX@+20 dBm), typical sensor nodes achieve >10-year battery life on two AA cells.