Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Core | 32-bit Arm Cortex-M3 |
| Maximum CPU Frequency | 72 MHz |
| Flash Memory | 128 KB |
| SRAM | 20 KB |
| Supply Voltage | 2.0 V to 3.6 V |
| Communication | USB 2.0 FS, CAN 2.0B, USART, SPI, I²C |
| Package | LQFP-48, 7 × 7 mm |
| Temperature Grade | -40 °C to +85 °C (T6) |
Product Overview
The STM32F103CBT6 is the 128 KB Flash member of STMicroelectronics’ medium-density STM32F103 performance line. It combines a 72 MHz Cortex-M3 core with 20 KB SRAM, a 2.0 V to 3.6 V supply range and the LQFP-48 package. For engineers comparing nearby STM32F103 codes, the CB memory designation is a practical selection point because it doubles the Flash capacity available in the C8 variant while retaining the same broad peripheral architecture.
Its peripheral set includes two 12-bit ADCs, a 7-channel DMA controller, general-purpose and advanced-control timers, USB full-speed, CAN 2.0B and multiple USART, SPI and I²C interfaces. The device is therefore suited to mixed control-and-connectivity designs where firmware headroom, analog acquisition and deterministic timer functions matter together.
Technical Specifications
| Group | Parameter | Value / Condition |
|---|---|---|
| Core | Architecture | Arm Cortex-M3, 32-bit |
| Core | Maximum frequency | 72 MHz |
| Memory | Flash | 128 KB |
| Memory | SRAM | 20 KB |
| Supply | VDD | 2.0 V to 3.6 V |
| Analog | ADC | 2 × 12-bit |
| Communication | USART | Up to 3 |
| Communication | SPI | Up to 2 |
| Communication | I²C | Up to 2 |
| Communication | USB | USB 2.0 full-speed |
| Communication | CAN | CAN 2.0B Active |
| DMA | Channels | 7 |
| GPIO | I/O on LQFP-48 | 37 |
| Package | Type | LQFP-48 |
| Operating | Temperature | -40 °C to +85 °C |
Product Status
| Item | Information |
|---|---|
| Manufacturer Status / Lifecycle | Active / volume production |
ST currently lists the STM32F103CB product line and the exact STM32F103CBT6 orderable code as a production device.
Functional Highlights
128 KB Flash is the exact-variant differentiator
The CBT6 ordering code provides 128 KB of embedded Flash. That extra program space can be decisive when middleware, bootloader code or communications stacks make a 64 KB variant too restrictive.
USB, CAN and motor-control timing share one MCU
Integrated USB full-speed and CAN reduce protocol-controller requirements, while the advanced timer provides PWM features useful in control-oriented designs. Board-level transceivers, connectors and protection remain external design responsibilities.
Applications / Application Fit
- Embedded control nodes requiring USB or CAN connectivity
- Motor-control and PWM control logic
- Sensor acquisition with multiple serial peripherals
- Industrial controllers where 128 KB Flash gives useful firmware margin
Design Considerations
Check the exact LQFP-48 alternate-function map before assigning USB, CAN, timers and serial buses; many signals share pins.
Treat 128 KB as the exact Flash limit when budgeting bootloader, application and update space.
The integrated CAN block still requires an external physical-layer transceiver.
USB implementation still requires appropriate clocking, routing, connector and ESD design.
Related Engineering Resources
- STMicroelectronics official product/family page — manufacturer-controlled product information and documentation.
- STM32F103CBT6 verified Datasheet PDF — identity-verified PDF hosted on HKEQGOO assets.
Alternative Candidates for Engineering Evaluation
| MPN | Manufacturer | Package |
|---|---|---|
| STM32F103CBT7 | STMicroelectronics | LQFP-48 |
| STM32F103CBT7TR | STMicroelectronics | LQFP-48 |
| CKS32F103CBT6 | CKS | LQFP-48 |
| HK32F103CBT6A | HK | LQFP-48 |
| CS32F103CBT7 | CHIPSEA | LQFP-48 |
Candidate alternative parts require engineering verification before substitution. Electrical characteristics, pinout, package, qualification, and application requirements should be verified before use.
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
