STMicroelectronics STM32F100C4T7B

Overview

STM32F100C4T7B from STMicroelectronics is a low-density value-line ARM® Cortex®-M3 microcontroller with 16 KB Flash, 4 KB SRAM, 24 MHz max CPU frequency, 1×12-bit ADC (1.2 µs), and 2×12-bit DACs - deployed in battery-powered sensor nodes, industrial HMI front-ends, and entry-level motor control interfaces.

For engineers reviewing the STM32F100C4T7B datasheet, STM32F100C4T7B pinout, STM32F100C4T7B application, or STM32F100C4T7B equivalent, key selection criteria include Flash/SRAM size constraints, 24 MHz real-time timing capability, dual DAC support for analog output generation, and LQFP48 package compatibility with space-limited PCB layouts.

Technical Context

The device implements an ARM Cortex-M3 core with single-cycle multiplication and hardware division, supporting deterministic interrupt latency via NVIC and precise timing through three 16-bit general-purpose timers plus one advanced-control timer with dead-time generation. Its clock system integrates 4–24 MHz HSE, 8 MHz HSI, 40 kHz LSI, and 32 kHz LSE with PLL-based CPU clock scaling.

Peripheral integration includes two I²C interfaces (SMBus/PMBus), three USARTs (with LIN/IrDA), two SPIs (12 Mbit/s), CEC, CRC unit, and 96-bit unique ID - all mapped to up to 37 I/Os in the LQFP48 variant, with nearly all pins 5 V-tolerant and configurable across 16 external interrupt vectors.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed pad for thermal dissipation; RoHS-compliant ECOPACK® construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F100C4T7B, STM32F030F4P6 trades DACs and timer sophistication for lower cost and simpler toolchain, while STM32F103C4T6 offers greater compute throughput at the expense of higher active current and reduced battery runtime.

Availability

STM32F100C4T7B is available at Aetrix Electronics and suitable for industrial sensor nodes, medical HMI panels, and smart energy meter interfaces requiring stable component supply and long-term production continuity.

Supply support for STM32F100C4T7B 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, specializing in microcontrollers, power management, MEMS, and automotive ICs.

The STM32F100 value line targets cost-sensitive, low-power embedded applications where deterministic real-time performance and analog integration are essential - balancing feature set, power efficiency, and price for high-volume industrial and consumer devices.

FAQ

What is the maximum operating frequency of the STM32F100C4T7B?

The STM32F100C4T7B operates at a maximum CPU frequency of 24 MHz, achieved via its internal PLL driven by either the 4–24 MHz HSE crystal oscillator or the 8 MHz HSI RC oscillator. This frequency is fixed by design for the F100 value line to optimize power efficiency and cost, unlike higher-tier F103 variants which support up to 72 MHz.

Does the STM32F100C4T7B support USB or CAN interfaces?

No, the STM32F100C4T7B does not integrate USB or CAN peripherals. Its communication suite includes up to two I²C, three USART, two SPI, and one CEC interface - sufficient for sensor networks, HMI, and metering applications but excluding native USB device/host or CAN bus connectivity. External transceivers or bridge ICs would be required for those protocols.

How many analog inputs does the integrated ADC support?

The integrated 12-bit ADC supports up to 16 external channels, though the LQFP48 package limits accessible channels to 10 (PA0–PA7, PB0–PB1, PC0–PC1). All channels share a common 1.2 µs conversion time and operate over the full 0–3.6 V input range, with optional use of the internal temperature sensor or VREF+ pin for calibration.

Is the STM32F100C4T7B pin-compatible with other STM32F100 variants?

Yes, the STM32F100C4T7B is fully pin-compatible with other LQFP48-packaged STM32F100x4/x6/x8/B devices (e.g., STM32F100C6T6, STM32F100C8T6), sharing identical pin definitions and electrical characteristics. Firmware portability is supported within the same density class, though higher-density variants may expose additional peripherals not present in the C4 configuration.