STMicroelectronics STM32WL33CCV7TR

Overview

STM32WL33CCV7TR 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 configurable RF transceiver supporting 2(G)FSK/4(G)FSK/OOK/ASK/D-BPSK/DSSS modulation. It delivers +20 dBm TX power, -132 dBm RX sensitivity at 300 bit/s (433 MHz OOK), and operates across 159–958 MHz ISM/SRD bands for LPWAN edge-node applications.

For engineers reviewing the STM32WL33CCV7TR datasheet, STM32WL33CCV7TR pinout, STM32WL33CCV7TR application, or STM32WL33CCV7TR equivalent, this device supports certified global deployments (ETSI EN 300 220, FCC Part 15/90, ARIB STD-T67/T108), autonomous wakeup radio (LPAWUR, -54 dBm, 4 µA), and hardware-accelerated AES-128 with TRNG - critical for secure, battery-operated sensor networks.

Technical Context

The STM32WL33CCV7TR integrates a dual-domain architecture: a Cortex®-M0+ MCU subsystem (AHB/APB buses, 8-channel DMA, MPU) tightly coupled to a dedicated sub-GHz RF subsystem (MR_SUBG digital IP + RFSUBG analog front-end) via AHB2APB bridge and shared memory-mapped registers. Its RF sequencer enables autonomous low-duty-cycle operations including sniff mode, frequency hopping, and listen-before-talk without CPU intervention.

It implements a direct-conversion TX path and low-IF RX path with programmable AGC, I/Q data access, polar TX control, and hardware-based DSSS correlation. The LPAWUR block operates in always-on mode with Manchester-encoded OOK frame detection (40-bit sync + 8-bit 0x99 sync + 56-bit payload + 16-bit CRC), triggering wake-up from Deepstop (960 nA) with 4 µA static current draw.

Key Specifications

Pinout & Package

VFQFPN48 package (6 × 6 mm, 0.4 mm pitch), RoHS-compliant ECOPACK2, with 32 GPIOs (all with retention), 3.3 V tolerant I/Os, and dedicated RF/analog pins routed to internal matching networks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SX1262IMLTRT, STM32WL33CCV7TR reduces system-level BOM count and firmware complexity via integrated MCU and security; compared with STM32WLE5JC, it offers lower active current and deeper sleep states ideal for ultra-long-life battery applications where LoRa is not required.

Availability

STM32WL33CCV7TR is available at Aetrix Electronics and suitable for asset tracking, remote metering, and industrial monitoring requiring stable component supply across automotive-grade temperature ranges (-40 °C to +105 °C) and global regulatory certifications.

Supply support for STM32WL33CCV7TR 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 RF solutions for industrial, automotive, and IoT markets.

The STM32WL33xx series belongs to ST's ultra-low-power wireless MCU product line, engineered specifically for battery-operated LPWAN endpoints needing global sub-GHz radio compliance, cryptographic security, and multi-year operational lifetime without maintenance.

FAQ

What is the maximum certified TX power level supported by STM32WL33CCV7TR in ETSI-compliant 868 MHz band?

The STM32WL33CCV7TR supports +14 dBm maximum certified output power in ETSI EN 300 220 Category 1 compliant 868 MHz operation when using the TXHP mode with appropriate external filtering. This meets the 25 mW ERP limit for license-free SRD use without requiring additional PA biasing or heatsinking.

Does STM32WL33CCV7TR support hardware-accelerated ECC or only AES-128?

The STM32WL33CCV7TR integrates a dedicated AES-128 co-processor and 16-bit TRNG but does not include hardware ECC acceleration. Elliptic curve cryptography must be implemented in software using the Cortex-M0+ core, leveraging its single-cycle multiplier and Thumb-2 instruction set for acceptable performance in key exchange operations.

Can the LPAWUR operate independently while the main MCU remains in Shutdown mode?

Yes - the LPAWUR block operates from the always-on power domain with its own 32 kHz clock source (LSI or LSE) and draws only 4 µA. It can detect Manchester-encoded OOK frames and assert a wakeup event to exit Shutdown mode without activating the main voltage regulator or PLL, preserving full 14 nA quiescent current until valid frame match occurs.

What is the minimum external component count required for basic 868 MHz operation with STM32WL33CCV7TR?

A functional 868 MHz design requires only three external components: a 48 MHz HSE crystal (with internal trimming capacitors), a 32 kHz LSE crystal (optional if using LSI), and a single 1 nF DC-blocking capacitor on the RFIO pin. No external balun, matching network, or PA is needed due to integrated 50 Ω RF port and +20 dBm capable transmitter.