STM32F042C4T6 - 48MHz Cortex-M0 16KB MCU | STMicroelectronics
MPN: STM32F042C4T6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.1352 | $3.14 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
STM32F042C4T6 Overview
A microcontroller, or MCU, integrates a processor core, memory, peripherals, and communication interfaces on one semiconductor device. The STM32F0 family belongs to the Arm Cortex-M0 microcontroller hierarchy and combines a low-complexity 32-bit instruction set with deterministic embedded control. In the STM32F042C4T6, the CPU executes from embedded Flash while SRAM supports working data and stack operations. USB, CAN, USART, SPI, and I2C support connected products, industrial controls, and service equipment.
The device combines a 48 MHz maximum operating frequency, 16 KB Flash, and 6 KB SRAM with a 12-bit ADC capable of handling up to 10 channels. USB 2.0 full-speed, CAN, multiple USART and SPI interfaces, I2C, timers, and a CEC-related feature make it suitable for compact USB-aware control nodes. The 48-LQFP package provides 48 externally accessible pins and is appropriate for designs requiring conventional leaded-package assembly and inspection.
The STM32F042C4T6 is positioned as a mainstream Arm Cortex-M0 MCU with a 2.5 V to 3.6 V supply range, as identified in distributor listings. Its 48-pin LQFP footprint simplifies access to communication and general-purpose I/O compared with smaller packages. Designers should confirm the complete pin multiplexing, clock, USB, CAN, and analog specifications against the manufacturer datasheet before releasing a production board.
Typical applications include USB-connected peripheral controllers, industrial communication modules, CAN nodes, data-acquisition equipment, consumer accessories, and compact embedded-control systems. The MCU can act as the central controller for a USB peripheral while using CAN or serial interfaces for local communication. Its 12-bit ADC supports analog monitoring, while timers and GPIO provide control and sensing connections.
Design guidance focuses on preserving USB signal integrity and separating analog, digital, and return-current paths. Place USB differential routing over a continuous reference plane, keep the USB transceiver and decoupling components close to their relevant pins, and validate firmware clocks and peripheral initialization against the manufacturer reference procedure. This page consolidates verified distributor specifications, sourcing information, and engineering-oriented usage guidance.
Drop-in alternatives for STM32F042C4T6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32F042C4T6 (same form factor and footprint) — differing in Core, Flash Memory, Package, Flash Organization, Product Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32F042C4T6
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →STM32F042C6T6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F042C6T7
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F038C6T6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F051R8T7
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F042C4T6 Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit ARM Cortex-M0 microcontroller |
| Maximum CPU Frequency | 48 MHz |
| Flash Memory | 16 KB |
| SRAM | 6 KB |
| Operating Voltage | 2.5 V to 3.6 V |
| USB | USB 2.0 full-speed |
| Communication Interfaces | CAN, USART, SPI, I2C and CEC-related feature |
| ADC | 12-bit ADC, up to 10 channels |
| Package | 48-LQFP, 7 x 7 mm |
| Pin Count | 48 pins |
| Mounting Type | Surface mount |
| Core | ARM Cortex-M0 |
| Architecture | 32-bit RISC |
| Flash Organization | 16K x 8 |
| Application Category | Mainstream Arm Cortex-M0 USB line MCU |
| Manufacturer | STMicroelectronics |
| Datasheet/Product Family | STM32F042x4/x6 |
STM32F042C4T6 48-lqfp, 7 x 7 mm Pin Configuration Guide
Pin configuration for STM32F042C4T6 (48-lqfp, 7 x 7 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for STM32F042C4T6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32F042C4T6 is suitable for 6 applications: USB Peripheral Controller, CAN Communication Module, Industrial Sensor Node, Data-Acquisition Controller, USB-to-CAN Configuration Tool, Consumer Accessory Controller.
USB Peripheral Controller
STM32F042C4T6 fits a USB peripheral when the product needs a 48 MHz Cortex-M0 control core together with USB 2.0 full-speed. The MCU can manage device enumeration, control commands, status reporting, and application-specific control logic while using its 16 KB Flash for firmware and 6 KB SRAM for working state. The 48-LQFP 7 x 7 mm package exposes the required interface and control pins more readily than a very small leadless package. A practical design should provide a continuous USB reference plane, controlled differential routing, local decoupling, and validated firmware initialization. The USB transceiver, connector, ESD protection, and power arrangement remain external design elements.
Recommended
CAN Communication Module
The STM32F042C4T6 is appropriate for a compact CAN node because the verified device data identifies CAN support alongside USB and a 48 MHz Cortex-M0 core. Its 12-bit ADC and multiple serial interfaces allow one controller to coordinate sensing, local actuation, and communication without a separate high-performance processor. In a CAN design, verify transceiver type, bus protection, termination, isolation requirements, and the exact pin multiplexing before layout release. Firmware should exercise bus-off recovery, error counters, filters, timing, and startup behavior. USB can serve as a service or configuration interface while CAN handles the field network.
Recommended
Industrial Sensor Node
STM32F042C4T6 can serve as the local controller in a compact industrial sensor node because it combines a 48 MHz control core, 12-bit ADC, GPIO, timers, and serial peripherals. The ADC can acquire analog sensor signals, while I2C or SPI can connect digital sensors and memory. Its 16 KB Flash and 6 KB SRAM are suitable for focused firmware rather than large local buffering or complex analytics, so data reduction should occur before transmission. Use isolated or protected field wiring where required, define EMC constraints before placing connectors, and validate calibration and noise performance across the intended input range. CAN or USB can provide local diagnostics and configuration.
Recommended
Data-Acquisition Controller
The STM32F042C4T6 is suitable for a small data-acquisition controller when the system requires USB connectivity, a 12-bit ADC, and moderate control processing. It can scan analog inputs, apply calibration and filtering, expose data over USB, and provide CAN or serial status reporting. The 6 KB SRAM limits simultaneous sample buffering, so applications with high sample rates should use external memory or stream data continuously. Place analog inputs away from USB and switching-current paths, provide a quiet reference and decoupling arrangement, and validate acquisition timing against the selected sample rate. Firmware must also handle conversion timing, overrun conditions, and safe output of invalid data.
Recommended
USB-to-CAN Configuration Tool
STM32F042C4T6 is a natural fit for a USB-to-CAN configuration tool because the same MCU provides USB full-speed and CAN in one device. A computer can use USB for command exchange and configuration-file transfer while the MCU handles CAN frame generation, filtering, acknowledgements, and diagnostics. The 16 KB Flash is appropriate for a focused utility, but larger host protocols, logging, and graphical workflows should be handled on the computer side. The board must isolate USB and CAN connector protection, provide correct transceiver supply levels, and include bus termination only where required. Validate hot-plug behavior, bus-off recovery, timeout handling, and firmware update strategy.
Recommended
Consumer Accessory Controller
STM32F042C4T6 can control a compact consumer accessory that needs USB firmware updates, local configuration, and simple user-interface logic. Its 48 MHz Cortex-M0 core is adequate for peripheral coordination, button or encoder input, LED indication, and communication rather than graphics-intensive work. The 12-bit ADC can monitor simple analog conditions, while USB full-speed supports a service connection. The 48-LQFP package is useful when the enclosure permits a leaded SMT assembly and the design needs a relatively generous pin count. Before production, define ESD and connector requirements, verify boot and firmware-update behavior, and test USB enumeration across the intended host operating systems and cable lengths.
Recommended
Recommended Products Summary
Engineering reference data for STM32F042C4T6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32F042C4T6 | STM32F042C6T6 | STM32F042C6T7 | STM32F038C6T6 | STM32F051R8T7 |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
Key Differentiators
- Integrated USB and CAN connectivity (vs STM32F051R8T7)
- Mainstream Cortex-M0 control platform (vs STM32F038C6T6)
- 48-LQFP integration with USB-line positioning (vs STM32F042C6T6)
Design Notes
Treat the USB differential pair as a controlled-impedance interface. Route the pair over a continuous reference plane with minimized stubs and vias, keep the USB connector, protection devices, and transceiver path physically close, and separate switching-current loops from the MCU supply and analog areas. Validate the layout against the selected USB full-speed transceiver and connector requirements rather than relying on package proximity alone.
Place required decoupling capacitors close to the STM32F042C4T6 supply pins and provide a low-impedance return path for high-frequency currents. The verified operating range is 2.5 V to 3.6 V, so the complete board—including USB transceiver, CAN transceiver, sensors, and protection devices—must share a compatible supply strategy. Check startup current, regulator stability, USB bus-powered current limits, and the effect of analog-reference loading before release.
Do not substitute a related STM32F0 part based only on the family name or package. Confirm the exact pin assignment for USB, CAN, oscillators, NRST, ADC inputs, and power pins, then verify memory size, voltage limits, temperature grade, peripheral availability, and boot behavior. The supplied cross-reference data identifies related devices but does not establish manufacturer-confirmed drop-in equivalence for every candidate.
For CAN, use the appropriate transceiver, protection network, isolation strategy, and termination arrangement dictated by the network topology. Keep the MCU-side interface away from high-current switching nodes and route both CAN conductors consistently. For ADC signals, use a quiet reference, controlled source impedance, and short traces, and validate sampling timing with the actual sensor and acquisition firmware.
Compliance Information
The supplied verified snippets do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. Compliance fields remain unknown rather than inferred.