STMicroelectronics STM32WL33C8V7TR

Overview

STM32WL33C8V7TR from STMicroelectronics is an ultra-low-power, single-core Arm® Cortex®-M0+ 32-bit wireless MCU integrating a sub-1 GHz transceiver, 64 KB flash, 16 KB SRAM (full retention), and 1 KB OTP. It supports 2(G)FSK/4(G)FSK/OOK/ASK/D-BPSK modulation across 159–185 MHz, 413–479 MHz, and 826–958 MHz bands, with RX sensitivity down to –132 dBm @300 bit/s (433 MHz OOK) and TX power up to +20 dBm - deployed in battery-powered LPWAN sensor nodes for remote metering.

For engineers reviewing the STM32WL33C8V7TR datasheet, STM32WL33C8V7TR pinout, STM32WL33C8V7TR application, or STM32WL33C8V7TR equivalent, this part delivers verified sub-GHz RF performance, autonomous wakeup radio (LPAWUR), integrated SMPS/LDO power management, and hardware AES-128/TRNG security - critical for certified industrial telemetry and smart utility deployments.

Technical Context

The STM32WL33C8V7TR implements a tightly coupled SoC architecture where the Arm Cortex-M0+ core (64 MHz max) shares AHB bus matrix access with the RF subsystem and DMA controller. Its dual-SRAM banks (SRAM0 always-on, SRAM1 configurable) enable low-power state retention during Deepstop mode (960 nA), while the RF subsystem operates autonomously via hardware sequencer-driven Sniff/Frequency Hopping modes.

Radio operation is decoupled from CPU execution through dedicated APB2 peripherals: MR_SUBG (digital RF IP) handles packet processing and timing, RFSUBG (analog RF IP) manages LNA/PA/AGC/IQ paths, and LPAWUR provides always-on OOK wake-up detection at –54 dBm sensitivity with 4 µA current draw - enabling multi-year battery life in intermittent sensing applications.

Key Specifications

Pinout & Package

VFQFPN48 package (6 × 6 mm, 0.4 mm pitch), RoHS-compliant ECOPACK2, with 32 GPIOs (all retention-capable), including dedicated RF interface pins (RFIO, RFIO_HF, ANT_SW), LPAWUR input (PA0), and dual clock inputs (HSE 48 MHz, LSE 32 kHz).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32WLE5JC and CC1312R7, the STM32WL33C8V7TR uniquely combines LPAWUR, integrated SMPS with BOF, and pre-certified W-MBUS/KNX-RF stacks - delivering lowest system-level BOM count and fastest time-to-certification for utility and building automation OEMs.

Availability

STM32WL33C8V7TR is available at Aetrix Electronics and suitable for remote metering, industrial monitoring and control, and smart home alarm systems requiring stable component supply across extended product lifecycles.

Supply support for STM32WL33C8V7TR 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, designing and manufacturing microcontrollers, power management ICs, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32WL33xx series targets certified LPWAN edge nodes - engineered specifically for sub-GHz wireless applications demanding ultra-low power, regulatory compliance (ETSI/FCC/ARIB), and integrated security in compact VFQFPN packages.

FAQ

What is the maximum certified TX power level for STM32WL33C8V7TR in ETSI EN 300 220 Category 1?

The STM32WL33C8V7TR achieves +14 dBm output power in TXHP mode when operating under ETSI EN 300 220 Category 1 limits - verified with integrated PA and matching network per ST reference design AN5572. This complies with the 500 µW e.i.r.p. limit at 868.0–868.6 MHz without external filtering.

Does STM32WL33C8V7TR support hardware-accelerated AES encryption for OTA firmware updates?

Yes - it integrates a dedicated AES-128 co-processor with DMA interface, enabling 16-byte block encryption/decryption in ≤12 clock cycles. When combined with the 16-bit TRNG and secure bootloader, it supports FIPS 140-2 Level 1–compliant OTA update authentication and confidentiality.

How does the LPAWUR feature reduce system-level power consumption in battery-operated sensors?

LPAWUR draws only 4 µA continuously while monitoring for Manchester-encoded wake frames - allowing the main Cortex-M0+ and RF transceiver to remain in Deepstop (960 nA). Upon frame detection, it asserts a wakeup signal within 12 µs, enabling full system boot in <100 µs - reducing average current by 92% versus periodic RX polling.

Which modulation schemes are supported in the 826–958 MHz band, and what are their typical air data rates?

In the 826–958 MHz band, STM32WL33C8V7TR supports 2(G)FSK (300 kbit/s), 4(G)FSK (600 kbit/s), OOK (10–100 kbit/s), and ASK (10–100 kbit/s). At 868 MHz, 2(G)FSK achieves –128 dBm sensitivity @300 bit/s, while 4(G)FSK reaches –112 dBm @38.4 kbit/s - optimized for high-throughput sensor networks.