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STMicroelectronics STM32F100CBT7BTR — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM32F100CBT7BTR ARM Cortex-M3 MCU, 24 MHz, 128 KB Flash

MPNSTM32F100CBT7BTR
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STMicroelectronics STM32F100CBT7BTR, STM32F1 series, 32-bit ARM Cortex-M3 MCU, 24 MHz, 128 KB Flash, 8 KB RAM, 2V to 3.6V supply, -40°C to 105°C, 48-LQFP.

$6.6900Ref. price · indicative, final on quote
STMicroelectronics STM32F100CBT7BTR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F100CBT7BTR specifications
ParameterValue
SeriesSTM32F1
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2V ~ 3.6V
Operating temperature-40°C~105°C(TA)
Speed24MHz
PackageTape & Reel (TR); Cut Tape (CT)
RAM size8K x 8
Core size32-Bit Single-Core
PeripheralsDMA, PDR, POR, PVD, PWM, Temp Sensor, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)37
Core processorARM® Cortex®-M3
Case48-LQFP
Data convertersA/D 10x12b; D/A 2x12b
Program memory size128KB (128K x 8)

Product details

The STM32F100CBT7BTR: 32-bit ARM Cortex-M3 MCU, clocked at 24 MHz, with 128 KB Flash and 8 KB RAM.

Runs at 24 MHz with a 2V to 3.6V supply range. Suitable for PID loops at a few kilohertz or Modbus RTU polling.

Industrial temperature range — the deployment context

Lifecycle reality — end-of-life planning needed

End-of-life status. Last-time-buy notice issued. For legacy support, we source through independent distribution.

Peripherals and I/O — what's on the package

37 GPIOs, I²C, SPI, USART, IrDA, and LIN interfaces cover the typical sensor-and-communication mix for a small controller. The 10-channel 12-bit ADC and dual 12-bit DAC handle analog I/O without an external converter IC.

Frequently asked questions

What is the closest pin-compatible alternative to STM32F100CBT7BTR?

A pin-compatible upgrade is the STM32F103CBT6, which runs at 72 MHz and offers 128 KB Flash in the same 48-LQFP package. It requires a firmware port due to the different peripheral set and clock tree, but the footprint and pinout match.

What is the core of STM32F100CBT7BTR?

The core is a 32-bit ARM Cortex-M3, single-core, running at 24 MHz.

Is STM32F100CBT7BTR 3.3V compatible?

Yes, the supply range is 2V to 3.6V, so it runs directly on a 3.3V rail without a regulator.