STMicroelectronics STM32F100C8T7B

Overview

STM32F100C8T7B from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in LQFP48 package, featuring 64 KB Flash, 8 KB SRAM, 24 MHz max CPU frequency, 12-bit ADC with 16 channels, dual 12-bit DACs, and up to 37 I/Os - deployed in industrial sensor nodes requiring compact size, low power, and analog signal conditioning.

For engineers reviewing the STM32F100C8T7B datasheet, STM32F100C8T7B pinout, STM32F100C8T7B application, or STM32F100C8T7B equivalent, key selection criteria include Flash/SRAM capacity, ADC/DAC resolution and channel count, I/O voltage tolerance (5 V), RTC with VBAT support, and SWD debug interface compatibility.

Technical Context

The device implements an ARM Cortex-M3 core with single-cycle multiply and hardware divide, supporting Thumb-2 instruction set for deterministic real-time execution. Its clock system integrates 4–24 MHz HSE, 8 MHz factory-trimmed HSI, 40 kHz LSI, and PLL for flexible CPU and peripheral clock derivation.

Peripherals include three USARTs (with LIN/IrDA), two I²C interfaces (SMBus/PMBus), two SPIs (12 Mbit/s), CEC, seven-channel DMA, and advanced timers with dead-time generation - enabling motor control, serial gateway, and mixed-signal embedded applications without external co-processors.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for cost-sensitive, space-constrained PCB layouts while maintaining thermal performance up to 85 °C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6, STM32F100C8T7B delivers higher analog fidelity and robust power supervision; versus STM32F103C8T6, it trades peak CPU speed for guaranteed RTC persistence and brown-out protection - critical for maintenance-free edge devices.

Availability

STM32F100C8T7B is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, USB-C power monitors, and portable data loggers requiring stable component supply across multi-year production cycles.

Supply support for STM32F100C8T7B 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, specializing in microcontrollers, power management, and analog/mixed-signal ICs for industrial, automotive, and consumer markets.

The STM32F100 value line targets cost-sensitive, low-power embedded applications - emphasizing analog integration (ADC/DAC), robust clock/reset architecture, and simplified debug - without sacrificing ARM Cortex-M3 ecosystem compatibility.

FAQ

What is the maximum operating temperature range for STM32F100C8T7B?

The STM32F100C8T7B is rated for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 5.3.1 of the official datasheet (DocID16455 Rev 9), where ambient operating conditions specify T_A = –40 to 85 °C under V_DD = 2.0–3.6 V. Thermal derating is not required within this range.

Does STM32F100C8T7B support USB device functionality?

No, STM32F100C8T7B does not integrate a USB peripheral. Unlike the STM32F103 series, the F100 value line omits USB OTG and dedicated USB PHY - confirmed in the device summary (Table 1) and peripheral count table (Table 2) of the datasheet. External USB-to-UART bridges are required for host communication.

How many independent PWM outputs can be generated simultaneously?

Up to 12 independent PWM outputs are possible: three 16-bit general-purpose timers (each with up to 4 channels), one 16-bit advanced-control timer (6 channels), and two basic timers (2 channels total). All channels support configurable polarity, dead-time insertion (on advanced timer), and synchronization - per Section 2.2.15 and Table 3 of the datasheet.

Is the internal 8 MHz RC oscillator factory-trimmed, and what is its accuracy?

Yes, the internal 8 MHz HSI oscillator is factory-trimmed to ±1% accuracy at 25 °C and 3.3 V, as specified in Section 5.3.7 (Table 23) of the datasheet. It remains stable across voltage (2.0–3.6 V) and temperature (–40 to 85 °C) with ±2.5% variation, making it suitable for clocking peripherals like USARTs when crystal-less operation is acceptable.