STM32F042K6T6 - 48MHz Cortex-M0 MCU 32KB Flash USB | STMicroelectronics
料号： STM32F042K6T6 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： STM32F042K6T6 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： STM32F042K6T6 （相同外形与封装尺寸） ——差异在于 Mounting Type, ADC, Communication Interfaces, Package, SRAM.
快速对比工具——选择替代料号进行并排对比：
STM32F042K6T7
✅ 直接替换📋 参考替代料（不在目录中）
STM32F042K4T6
✅ 直接替换📋 参考替代料（不在目录中）
STM32F072K6T6
✅ 直接替换📋 参考替代料（不在目录中）
STM32F042K6T6Y
✅ 直接替换📋 参考替代料（不在目录中）
GD32E230K6Q
✅ 直接替换📋 参考替代料（不在目录中）
STM32F042K6T6 最大额定值与电气特性
| Core Architecture | ARM Cortex-M0 (32-bit RISC) |
| 最大时钟频率 | 48 MHz |
| Program Memory (Flash) | 32 KB |
| SRAM | 6 KB |
| Operating Voltage Range | 2.0 V to 3.6 V |
| 封装 | 32-LQFP (7x7 mm) |
| 引脚数量 | 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 |
| 工作温度范围 | -40 C to +85 C |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 (168 hours) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
STM32F042K6T6 引脚配置
| 引脚 1 | PB7 — General-purpose I/O / I2C1_SDA |
| 引脚 2 | PB6 — General-purpose I/O / I2C1_SCL |
| 引脚 3 | PB5 — General-purpose I/O / SPI1_MOSI |
| 引脚 4 | PB4 — General-purpose I/O / SPI1_MISO |
| 引脚 5 | PB3 — General-purpose I/O / SPI1_SCK |
| 引脚 6 | PA10 — General-purpose I/O / I2C1_SDA |
| 引脚 7 | PA9 — General-purpose I/O / USART1_TX |
| 引脚 8 | PA8 — General-purpose I/O |
| 引脚 9 | PA7 — General-purpose I/O / ADC_IN7 |
| 引脚 10 | PA6 — General-purpose I/O / ADC_IN6 |
| 引脚 11 | PA5 — General-purpose I/O / ADC_IN5 |
| 引脚 12 | PA4 — General-purpose I/O / ADC_IN4 |
| 引脚 13 | PA3 — General-purpose I/O / ADC_IN3 / USART2_RX |
| 引脚 14 | PA2 — General-purpose I/O / ADC_IN2 / USART2_TX |
| 引脚 15 | PA1 — General-purpose I/O / ADC_IN1 |
| 引脚 16 | PA0 — General-purpose I/O / ADC_IN0 / WKUP |
| 引脚 17 | VSSA — Analog ground |
| 引脚 18 | VDDA — Analog supply voltage (2.0V-3.6V) |
| 引脚 19 | NRST — Reset input (active low) |
| 引脚 20 | VSS_1 — Digital ground |
| 引脚 21 | VDD_1 — Digital supply voltage (2.0V-3.6V) |
| 引脚 22 | OSC_OUT — External oscillator output |
| 引脚 23 | OSC_IN — External oscillator input |
| 引脚 24 | BOOT0 — Boot mode selection |
| 引脚 25 | PA13 — General-purpose I/O / SWDIO |
| 引脚 26 | PA14 — General-purpose I/O / SWCLK |
| 引脚 27 | PA15 — General-purpose I/O / SPI1_NSS |
| 引脚 28 | PB0 — General-purpose I/O / ADC_IN8 |
| 引脚 29 | PB1 — General-purpose I/O / ADC_IN9 |
| 引脚 30 | PB2 — General-purpose I/O / BOOT1 |
| 引脚 31 | PA11 — General-purpose I/O / USB DM |
| 引脚 32 | PA12 — General-purpose I/O / USB DP |
典型应用
STM32F042K6T6 适用于 7 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： STM32F042K6T6 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- On-chip USB 2.0 Full-Speed PHY eliminates external transceiver （对比 STM32F030K6T6)
- Integrated CAN 2.0B plus USB - rare combination at this price point （对比 GD32E230K6Q)
- Migration path within ST family with same LQFP-32 footprint （对比 STM32F072K6T6)
设计说明
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.
合规信息
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.
