STMicroelectronics STM32G491CCT3

Overview

STM32G491CCT3 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, operating up to 170 MHz (213 DMIPS), featuring 512 KB Flash with ECC, 112 KB SRAM (96 KB + 16 KB CCM), and integrated analog peripherals including three 16-bit ADCs, four 12-bit DACs, four rail-to-rail comparators, and four operational amplifiers. It supports FDCAN, USB Full-Speed, UCPD, and advanced motor control timers - deployed in industrial motor drives and precision sensor signal conditioning systems.

For engineers reviewing the STM32G491CCT3 datasheet, STM32G491CCT3 pinout, STM32G491CCT3 application, or STM32G491CCT3 equivalent, key selection criteria include its 48-pin UFQFPN package, 170 MHz real-time performance with ART Accelerator, CORDIC/FMAC math acceleration, dual FDCAN interfaces for automotive-grade communication, and hardware-voltage-reference-buffer (VREFBUF) supporting 2.048 V/2.5 V/2.9 V outputs.

Technical Context

The STM32G491CCT3 implements a tightly coupled Arm Cortex-M4 core with FPU and Memory Protection Unit (MPU), paired with ST's Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its interconnect matrix routes 16 DMA channels across multiple AHB/APB buses for concurrent peripheral access.

It integrates dual FDCAN controllers compliant with ISO 11898-1:2015 (FD mode), USB 2.0 Full-Speed with LPM/BCD, and a dedicated UCPD controller for USB Type-C™ power delivery negotiation - all synchronized via a multi-source clock system with PLL, 4–48 MHz crystal support, and calibrated 32 kHz RTC oscillator.

Key Specifications

Pinout & Package

STM32G491CCT3 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package, 7 mm × 7 mm body, 0.5 mm lead pitch, exposed thermal pad, RoHS-compliant and ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance mixed-signal microcontroller applications.

Compared with STM32G474RET6, the STM32G491CCT3 adds USB-C PD and second FDCAN at identical Flash/SRAM density but in smaller UFQFPN48; versus STM32H743VIT6, it delivers 90% of real-time analog/motor control capability at ~60% power and 40% BOM cost - making it optimal for cost-sensitive, space-constrained embedded systems.

Availability

STM32G491CCT3 is available at Aetrix Electronics and suitable for industrial motor drives, smart sensor nodes, USB-C PD sources, and medical infusion pumps requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32G491CCT3 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 STM32G4 series targets high-efficiency analog-intensive applications - combining real-time control, mathematical acceleration, and rich connectivity for industrial automation, digital power, and portable medical equipment.

FAQ

What is the maximum operating temperature range for STM32G491CCT3?

The STM32G491CCT3 is rated for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in Section 5.3.1 of DS13122 Rev 4, with thermal derating guidelines provided in Table 16 (Thermal Characteristics) and validated across all package variants including UFQFPN48.

Does STM32G491CCT3 support hardware encryption?

No - the STM32G491CCT3 does not integrate AES, PKA, or TRNG-based cryptographic accelerators. It includes a True Random Number Generator (RNG) and 96-bit unique ID, but lacks dedicated crypto engines found in STM32L5 or STM32WB series. Secure boot relies on PCROP and securable memory areas only.

Can STM32G491CCT3 run FreeRTOS with all peripherals active?

Yes - with 112 KB SRAM and 512 KB Flash, the device fully supports FreeRTOS v10.x+ with heap allocation for queues, mutexes, and timers. Verified reference designs (e.g., STM32CubeG4 examples) demonstrate concurrent operation of FDCAN, USB, ADC, and PWM tasks under FreeRTOS scheduler with <5 µs worst-case ISR latency.

Is the UFQFPN48 package of STM32G491CCT3 compatible with reflow soldering per J-STD-020?

Yes - the UFQFPN48 package (A0B9 variant) complies with JEDEC J-STD-020D.3 moisture sensitivity level (MSL) 3, peak reflow temperature 260 °C, and thermal profile specifications are documented in Section 6.3 of DS13122 Rev 4, including recommended soak and ramp rates.