STMicroelectronics STM32F100C8T7BTR

Overview

STM32F100C8T7BTR 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 (16-channel), dual 12-bit DACs, and 8 communication interfaces including USART, SPI, I²C, and CEC. It targets cost-sensitive industrial control, sensor nodes, and smart peripherals requiring integrated analog I/O and low-power operation.

For engineers reviewing the STM32F100C8T7BTR datasheet, STM32F100C8T7BTR pinout, STM32F100C8T7BTR application, or STM32F100C8T7BTR equivalent, key selection criteria include Flash/SRAM size, ADC/DAC resolution and channel count, supported low-power modes (Stop/Standby with VBAT), and peripheral mix for embedded real-time control with analog signal conditioning.

Technical Context

The device implements an ARM Cortex-M3 core with single-cycle multiply and hardware divide, executing at up to 24 MHz (1.25 DMIPS/MHz). Its clock system integrates a 4–24 MHz external crystal oscillator, 8 MHz factory-trimmed internal RC, 40 kHz RC, PLL for CPU clock scaling, and dedicated 32 kHz RTC oscillator with calibration.

Peripherals include seven DMA channels supporting timers, ADC, SPI, I²C, USART, and DACs; three 16-bit general-purpose timers with IC/OC/PWM; one advanced-control timer with dead-time generation and emergency stop; two basic timers for DAC triggering; and dual watchdogs (independent + window).

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified. Pin count and I/O mapping optimized for compact PCB layouts with up to 37 fast I/Os - all 5 V-tolerant except analog inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F100C8T7BTR, STM32F030F4P6 trades analog capability for lower cost and power, while STM32F103C8T6 adds USB and headroom for future firmware expansion - making the F100 ideal for fixed-feature, thermally demanding, analog-rich embedded systems where USB is irrelevant.

Availability

STM32F100C8T7BTR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, portable medical devices, and consumer appliance UI controllers requiring stable component supply across multi-year production cycles.

Supply support for STM32F100C8T7BTR 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, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components.

This part belongs to the STM32F100 value line - engineered for cost-optimized, low-to-medium complexity embedded applications where analog integration, low-power operation, and industrial temperature range (–40°C to +105°C) are critical design requirements.

FAQ

What is the maximum operating temperature rating for STM32F100C8T7BTR?

The STM32F100C8T7BTR is rated for industrial temperature range: –40°C to +105°C. This is confirmed in Section 5.3.2 of the official datasheet (DocID16455 Rev 9), where ambient temperature limits and thermal derating curves are specified for all operating modes including Run, Stop, and Standby.

Does STM32F100C8T7BTR support USB device functionality?

No, STM32F100C8T7BTR does not include a USB physical layer or USB controller. Unlike the STM32F103 series, the F100 value line omits USB entirely - PA11/PA12 pins are not connected to USB functionality and serve only as general-purpose I/O or alternate functions like TIM1_CH4.

How many I/O pins are 5 V tolerant on this device?

37 of the 48 I/O pins are 5 V tolerant, as stated in the "Features" section of the datasheet and verified in Table 4 (Pin Definitions) and Section 5.3.13 (I/O port characteristics). Exceptions include analog inputs (PA0–PA7, PB0–PB1) and BOOT0, which must remain within VDD + 0.3 V.

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

Yes, the internal 8 MHz RC oscillator is factory-trimmed to ±1% accuracy at 25°C and 3.3 V, as documented in Section 5.3.7 (Internal clock source characteristics) and Table 23 of the datasheet. Calibration can be further refined using the RCC calibration register (RCC_CR) if higher precision is required.