STM32F042K6T6 - 48MHz Cortex-M0 MCU 32KB Flash USB | STMicroelectronics
Référence : STM32F042K6T6 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.08 | $30,80 |
| 100 | $2.61 | $261,00 |
| 500 | $2.18 | $1 090,00 |
| 1 000 | $1.84 | $1 840,00 |
STM32F042K6T6 Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and peripheral interfaces. Within the broader taxonomy, the STM32F042K6T6 sits at the intersection of embedded processor -> ARM Cortex-M0 core -> 32-bit RISC MCU -> mainstream connectivity line MCU. The Cortex-M0 architecture uses the Thumb/Thumb-2 instruction set and is designed for deterministic, low-power real-time control, making the F042 series ideal for USB Type-C accessories, human-interface devices, and small-form-factor sensor nodes.
Key features include 32 KB Flash with read-while-write support, 6 KB SRAM with hardware parity, a 12-bit 1 Msps ADC with up to 13 external channels, two 16-bit timers, one 32-bit timer, an independent watchdog, a real-time clock, and a USB 2.0 Full-Speed Device interface with integrated PHY that eliminates the need for an external USB transceiver. The device operates from 2.0V to 3.6V and supports both 2.5V and 3.3V application rails, with multiple low-power modes (Sleep, Stop, Standby) suited to battery-powered products.
Architecturally, the STM32F042K6T6 leverages ST's 90 nm embedded Flash process and the Cortex-M0 v6-M core with single-cycle multiplier, achieving 0.93 DMIPS/MHz. The integrated 4-16 MHz HSI oscillator with PLL, plus a 32 kHz LSI for the RTC, allow bill-of-material reduction by removing the external crystal in non-USB applications. The CAN 2.0B interface, combined with USB, makes this part uniquely positioned among Cortex-M0 devices for industrial control and automotive body networks.
Typical applications include USB HID peripherals (keyboards, mice, custom HID), USB-to-UART bridges, USB-C audio accessories, CAN node endpoints in industrial networks, small motor control boards, smart-home sensor hubs, and USB-charged IoT endpoints. The 32-pin LQFP footprint is breadboard-friendly and supports hand-rework prototypes while remaining suitable for high-volume SMT assembly.
Design consideration: because USB DP/DM pins are bonded to specific GPIO pins (PA11/PA12), designers must avoid remapping these to alternate functions when the USB peripheral is enabled. The integrated pull-up resistor on the DP line is software-controlled, simplifying bus-powered designs. For CAN applications, an external transceiver (e.g., SN65HVD230) is still required because the F042 provides only the protocol controller.
This page synthesizes distributor pricing, drop-in same-package alternatives, and design considerations not found in a single datasheet excerpt.
Alternatives de remplacement direct pour STM32F042K6T6 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec STM32F042K6T6 (même facteur de forme et même empreinte) — différant par Mounting Type, ADC, Communication Interfaces, Package, SRAM.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
STM32F042K6T7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32F042K4T6
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32F072K6T6
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32F042K6T6Y
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
GD32E230K6Q
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32F042K6T6 Valeurs maximales et caractéristiques électriques
| Core Architecture | ARM Cortex-M0 (32-bit RISC) |
| Fréquence d'horloge maximale | 48 MHz |
| Program Memory (Flash) | 32 KB |
| SRAM | 6 KB |
| Operating Voltage Range | 2.0 V to 3.6 V |
| Boîtier | 32-LQFP (7x7 mm) |
| Nombre de broches | 32 |
| USB Interface | USB 2.0 Full-Speed Device with on-chip PHY |
| CAN Interface | CAN 2.0B (bxCAN) |
| ADC | 12-bit, up to 13 channels, 1 Msps |
| Timers | 2x 16-bit, 1x 32-bit, 1x SysTick, 1x WDG, 1x IWDG |
| Communication Interfaces | USB, CAN, 2x I2C, 2x SPI, 2x USART, HDMI CEC |
| Plage de température de fonctionnement | -40 C to +85 C |
| Type de montage | Surface Mount |
| Niveau MSL | 3 (168 hours) |
| Statut RoHS | Compliant |
| Lead-Free | Yes |
Configuration des broches de STM32F042K6T6
| Broche 1 | PB7 — General-purpose I/O / I2C1_SDA |
| Broche 2 | PB6 — General-purpose I/O / I2C1_SCL |
| Broche 3 | PB5 — General-purpose I/O / SPI1_MOSI |
| Broche 4 | PB4 — General-purpose I/O / SPI1_MISO |
| Broche 5 | PB3 — General-purpose I/O / SPI1_SCK |
| Broche 6 | PA10 — General-purpose I/O / I2C1_SDA |
| Broche 7 | PA9 — General-purpose I/O / USART1_TX |
| Broche 8 | PA8 — General-purpose I/O |
| Broche 9 | PA7 — General-purpose I/O / ADC_IN7 |
| Broche 10 | PA6 — General-purpose I/O / ADC_IN6 |
| Broche 11 | PA5 — General-purpose I/O / ADC_IN5 |
| Broche 12 | PA4 — General-purpose I/O / ADC_IN4 |
| Broche 13 | PA3 — General-purpose I/O / ADC_IN3 / USART2_RX |
| Broche 14 | PA2 — General-purpose I/O / ADC_IN2 / USART2_TX |
| Broche 15 | PA1 — General-purpose I/O / ADC_IN1 |
| Broche 16 | PA0 — General-purpose I/O / ADC_IN0 / WKUP |
| Broche 17 | VSSA — Analog ground |
| Broche 18 | VDDA — Analog supply voltage (2.0V-3.6V) |
| Broche 19 | NRST — Reset input (active low) |
| Broche 20 | VSS_1 — Digital ground |
| Broche 21 | VDD_1 — Digital supply voltage (2.0V-3.6V) |
| Broche 22 | OSC_OUT — External oscillator output |
| Broche 23 | OSC_IN — External oscillator input |
| Broche 24 | BOOT0 — Boot mode selection |
| Broche 25 | PA13 — General-purpose I/O / SWDIO |
| Broche 26 | PA14 — General-purpose I/O / SWCLK |
| Broche 27 | PA15 — General-purpose I/O / SPI1_NSS |
| Broche 28 | PB0 — General-purpose I/O / ADC_IN8 |
| Broche 29 | PB1 — General-purpose I/O / ADC_IN9 |
| Broche 30 | PB2 — General-purpose I/O / BOOT1 |
| Broche 31 | PA11 — General-purpose I/O / USB DM |
| Broche 32 | PA12 — General-purpose I/O / USB DP |
Applications typiques
STM32F042K6T6 convient pour 7 applications: USB HID Peripheral Devices, USB-to-UART Bridge Dongle, CAN Bus Sensor Node, USB-C Audio Dongle, Small Motor Control Board, Smart Home Sensor Hub, USB Charged IoT Endpoint.
USB HID Peripheral Devices
The STM32F042K6T6 is purpose-built for USB Human Interface Devices because it integrates a USB 2.0 Full-Speed Device controller with on-chip PHY, eliminating the need for an external transceiver. Its 32 KB Flash accommodates standard HID report descriptors plus vendor-specific extensions, while the 6 KB SRAM holds HID buffers and protocol state without DMA thrash. The integrated DP pull-up resistor is software-controlled, simplifying bus-powered HID keyboards, mice, game controllers, and custom HID devices that draw less than 100 mA from the USB rail.
Recommandé
USB-to-UART Bridge Dongle
For USB-to-UART bridge dongles, the STM32F042K6T6 delivers a reliable CDC-ACM virtual COM port with on-chip USB PHY and three USART peripherals operating up to 6 Mbaud. The 48 MHz Cortex-M0 core is fast enough to handle 1 Mbaud UART bridging without flow control issues, while 32 KB Flash holds the USB CDC stack plus optional vendor commands. Designers can repurpose unused GPIO for RS-485 direction control or status LEDs, and the 32-LQFP footprint fits into sub-15 mm dongle PCBs.
Recommandé
CAN Bus Sensor Node
The STM32F042K6T6's integrated CAN 2.0B (bxCAN) interface enables compact industrial sensor nodes in CANopen and DeviceNet networks. Paired with an external CAN transceiver like the SN65HVD230, the F042 provides 11-bit and 29-bit identifier filtering, three transmit mailboxes, and two receive FIFOs for message buffering. The 32-LQFP package exposes enough GPIO for analog inputs and digital I/O, while the 12-bit 1 Msps ADC handles thermistor, strain gauge, and 4-20 mA loop interfaces typical in industrial sensors.
Recommandé
USB-C Audio Dongle
In USB-C audio accessories, the STM32F042K6T6 acts as the USB device controller while a companion DAC handles audio rendering. The on-chip USB Full-Speed PHY and bulk transfer support provide sufficient bandwidth for 24-bit/48 kHz stereo audio streams, while 32 KB Flash stores USB audio class 1.0 descriptors and any vendor-specific HID controls. GPIO and timer resources support volume buttons, mute switches, and LED ring indicators. The 32-LQFP fits within Type-C dongle enclosures with space for a small DSP or DAC companion chip.
Recommandé
Small Motor Control Board
The STM32F042K6T6 drives small brushed DC and stepper motors using its 16-bit and 32-bit timers with complementary PWM outputs and programmable dead-time insertion. The 12-bit ADC samples back-EMF or current-sense amplifiers with 1 Msps, while the 32-LQFP provides enough pins for H-bridge gate signals, encoder inputs, and fault detection. Designers benefit from ST's MC SDK reference algorithms for 6-step and FOC trapezoidal control, allowing 24V/2A motor platforms in compact form factors.
Recommandé
Smart Home Sensor Hub
The STM32F042K6T6 serves as a low-cost smart-home sensor hub combining Zigbee-ready GPIO, USB diagnostics, and CAN for HVAC integration. The 32 KB Flash holds a small RTOS kernel plus Thread/Zigbee stack stubs, while the USB interface enables firmware updates and configuration via a phone or PC. With low-power Stop and Standby modes (under 5 uA typical), battery-powered door/window sensors and leak detectors can run for years on a single CR2032 coin cell, with USB available for tethered commissioning.
Recommandé
USB Charged IoT Endpoint
For IoT endpoints powered and provisioned through USB, the STM32F042K6T6 provides bus-powered operation, USB CDC firmware updates, and a CAN or UART link to the host gateway. Its 32-LQFP layout exposes 25+ GPIO for sensors, relays, and indicator LEDs, while the integrated USB suspend/resume logic allows compliance with USB battery charging specification 1.2. Combined with an external buck regulator, the device forms a complete USB-charged IoT node for retail, asset tracking, or industrial telemetry deployments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STM32F042K6T6 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | STM32F042K6T7 | STM32F042K4T6 | STM32F072K6T6 | GD32E230K6Q |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same |
| Core | ARM Cortex-M0 @ 48 MHz | Cortex-M0 @ 48 MHz | Cortex-M0 @ 48 MHz | Cortex-M0 @ 48 MHz | Cortex-M23 @ 72 MHz |
| Flash | 32 KB | 32 KB | 16 KB | 32 KB | 32 KB |
| SRAM | 6 KB | 6 KB | 6 KB | 6 KB | 4 KB |
| USB | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY + USB-C PD | USB 2.0 FS Device + PHY |
| CAN | CAN 2.0B | CAN 2.0B | CAN 2.0B | CAN 2.0B | No CAN |
| Automotive Qualified | No (industrial grade) | No | No | No | No |
| Approx. Unit Price @ 1000 | $1.84 | ~$1.84 (T&R variant) | ~$1.65 | ~$2.10 | ~$0.95 |
Principaux différenciateurs
- On-chip USB 2.0 Full-Speed PHY eliminates external transceiver (vs STM32F030K6T6)
- Integrated CAN 2.0B plus USB - rare combination at this price point (vs GD32E230K6Q)
- Migration path within ST family with same LQFP-32 footprint (vs STM32F072K6T6)
Notes de conception
The STM32F042K6T6 operates from 2.0V to 3.6V on VDD/VDDA. Decouple each VDD pin with a 100 nF X7R ceramic placed within 3 mm of the pin, and add a bulk 4.7 uF tantalum or ceramic on the main rail. VDDA should be tied to VDD through a ferrite bead or simple RC filter for ADC noise-sensitive applications. Estimated: at 48 MHz active current is roughly 7-10 mA per the family datasheet, and Stop mode with RTC drops below 5 uA typical.
USB DP and DM traces must be routed as a 90 ohm differential pair with length matching within 150 mils. Keep the pair away from switching signals and clock traces; place the 0 ohm common-mode choke near the connector side. The internal PHY requires a 1.5 kohm pull-up on DP (software-controlled) and ESD protection such as USBLC6-2SC6 near the connector. Estimated: total USB bus capacitance budget is 50 pF including connector, cable, and PCB traces.
A common design pitfall is leaving PA11/PA12 configured as GPIO when USB is enabled, causing enumeration failure. Always configure PA11 as USB_DM and PA12 as USB_DP alternate function before calling the USB peripheral init. Another pitfall is forgetting to enable the 48 MHz clock: the USB peripheral requires HSE or HSI48 with PLL at exactly 48 MHz. Use the STM32CubeMX clock tree view to validate. For CAN, an external transceiver is mandatory; the F042 provides only the protocol controller.
Estimated: at 48 MHz and 3.3V, the F042 draws approximately 8 mA active, dissipating around 26 mW. The 32-LQFP theta_JA of approximately 70 C/W yields a junction temperature rise of only 1.8 C above ambient, so no heatsinking is required. However, in enclosed industrial enclosures above 60 C ambient, ensure the supply voltage remains within spec as MCU current rises slightly with temperature. The internal voltage regulator does not require external pass components but adds approximately 1 mA quiescent.
Informations de conformité
RoHS and REACH compliant per STMicroelectronics product page. Standard variant is not AEC-Q100 qualified; choose STM32F042K6T6Y for automotive Grade 2. Lead-free and halogen-free packaging. Conflict-mineral statement available from ST.
