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STMicroelectronics STM32F100CBT7B
- Part No.:
- STM32F100CBT7B
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F100CBT7B.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
STM32F100CBT7B from STMicroelectronics is a 32-bit ARM® Cortex®-M3 microcontroller in LQFP48 package, featuring 128 KB Flash, 8 KB SRAM, 24 MHz max CPU frequency, 12-bit ADC with 16 channels, and dual 12-bit DACs - deployed in industrial sensor nodes, motor control interfaces, and smart metering front-ends.
For engineers reviewing the STM32F100CBT7B datasheet, STM32F100CBT7B pinout, STM32F100CBT7B application, or STM32F100CBT7B equivalent, key selection criteria include Flash/SRAM capacity, integrated analog peripherals (ADC/DAC), low-power mode support (Stop/Standby), and 5 V-tolerant I/O count for legacy interface compatibility.
Technical Context
The STM32F100CBT7B 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 servicing timers, ADC, SPI, I²C, USART, and DACs; three 16-bit general-purpose timers with IC/OC/PWM; one advanced-control timer with 6-channel PWM, dead-time generation, and emergency stop; two basic 16-bit timers for DAC triggering; and eight communication interfaces (up to 3 USARTs, 2 I²C, 2 SPI, CEC).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 24 MHz max frequency - enables deterministic real-time control with 1.25 DMIPS/MHz performance. |
| Memory | 128 KB Flash + 8 KB SRAM - sufficient for firmware with protocol stacks (e.g., Modbus RTU) and local data buffering. |
| Analog Peripherals | 1 × 12-bit, 1.2 µs ADC (16 ch) + 2 × 12-bit DACs - supports closed-loop analog feedback and waveform generation without external converters. |
| Timers | 12 timers including 3× 16-bit GP, 1× advanced-control (6-PWM), 2× basic (DAC trigger), 2× watchdogs - meets motor FOC, PWM timing, and safety monitoring requirements. |
| I/O & Voltage | 37 I/O pins, 5 V-tolerant on most, 2.0–3.6 V supply - simplifies interfacing with 5 V logic and legacy sensors without level shifters. |
| Low-Power Modes | Sleep, Stop, Standby with VBAT backup for RTC - achieves sub-1 µA standby current for battery-powered endpoint devices. |
| Communication | Up to 3 USARTs (LIN/IrDA/ISO 7816), 2 I²C (SMBus/PMBus), 2 SPI (12 Mbit/s), CEC - supports industrial comms, sensor fusion, and consumer device control. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed pad for thermal management; RoHS-compliant ECOPACK®.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers core/peripherals; VSS provides reference return - requires local decoupling per datasheet layout guidelines. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | 37 total GPIOs, most 5 V-tolerant - enable direct connection to 5 V sensors, encoders, and digital I/O modules. |
| OSC_IN / OSC_OUT | External crystal oscillator input/output | Supports 4–24 MHz quartz crystals - used for precise system clock or USB-free timing in industrial timing applications. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up - accepts external push-button or supervisor IC assertion for reliable power-on and fault recovery. |
| BOOT0 | Boot mode selection | Configures boot source (system memory, embedded Flash, or SRAM) - critical for field firmware updates via USART or SWD debug recovery. |
| SWDIO / SWCLK | Serial Wire Debug interface | 2-pin debug port replacing JTAG - reduces PCB footprint while supporting full flash programming, breakpoint, and register inspection. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded CRC calculation unit | Hardware-accelerated checksum for firmware integrity verification and data packet validation in noisy industrial networks. |
| Programmable voltage detector (PVD) | Monitors VDD against user-configurable threshold (2.2–2.9 V) - triggers interrupt before brown-out, enabling graceful shutdown or data save. |
| Temperature sensor | Integrated calibrated sensor with ±1.5°C accuracy (0–100°C) - eliminates external thermistor for ambient temperature compensation in motor drives. |
| 96-bit unique ID | Factory-programmed serial number - enables secure device authentication and license binding in OEM production lines. |
| Remappable alternate functions | All major peripherals (USART, SPI, I²C, timers) assignable to multiple GPIO banks - increases board layout flexibility and reduces routing congestion. |
Applications
| Industrial Sensor Node | Smart Energy Meter Front-End |
|---|---|
Use Scenario: Compact environmental monitoring node with analog sensor inputs (temp, humidity, pressure) and RS-485 Modbus output. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, data preprocessing, CRC-protected packet assembly, and UART-to-RS485 translation. Use Value: Integrated 12-bit ADC + dual DAC + 37 GPIOs eliminate external signal conditioning ICs; Stop mode draws <1.5 µA for battery life >5 years. |
Use Scenario: Residential electricity meter measuring voltage/current via shunt/CT, calculating kWh, and communicating via optical IR or RF. IC Role / Device Role / Timing Role: Real-time energy computation engine with RTC timestamping, tamper detection, and secure firmware update over IrDA. Use Value: On-chip 32 kHz RTC with VBAT backup ensures accurate billing timestamps during mains outage; 96-bit UID enables meter-specific encryption keys. |
| Brushless DC Motor Interface | Home Appliance Control Panel |
Use Scenario: Low-cost BLDC driver for fans or pumps using hall-effect commutation and analog current sensing. IC Role / Device Role / Timing Role: PWM generator with dead-time insertion, ADC-based current loop feedback, and emergency stop monitoring. Use Value: Advanced-control timer delivers synchronized 6-channel PWM with hardware dead-time; 12-bit ADC samples current at 1.2 µs resolution for stable torque control. |
Use Scenario: Touchless control panel for washing machines with capacitive touch, LED indicators, buzzer, and appliance status display. IC Role / Device Role / Timing Role: Human interface processor handling touch scan, LED dimming via PWM, audio tone generation, and I²C display driver interface. Use Value: Dual 12-bit DACs generate smooth audio tones; remappable GPIOs allow flexible button/LED layout; 5 V-tolerant I/O simplifies integration with legacy indicator LEDs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F070CBT6 | ARM Cortex-M0, 48 MHz, 128 KB Flash, 16 KB SRAM, no DAC, 12-bit ADC (16 ch) | Lacks dual DACs and advanced timer features; lower power consumption in Run mode | Select when cost sensitivity outweighs need for analog output or complex PWM timing. |
| STM32F103C8T6 | Cortex-M3, 72 MHz, 64 KB Flash, 20 KB SRAM, same peripheral set but higher clock and memory density | Higher performance and larger code space; not qualified for extended temperature range (-40°C to +85°C vs. -40°C to +105°C) | Choose for compute-intensive tasks requiring faster execution or larger firmware, accepting wider temp grade trade-off. |
Compared with STM32F100CBT7B, the STM32F070CBT6 offers lower cost and power but omits DACs essential for analog actuation, while the STM32F103C8T6 delivers higher throughput and memory at the expense of industrial-grade temperature tolerance and optimized low-power modes.
Availability
STM32F100CBT7B is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, BLDC motor interfaces, and home appliance control panels requiring stable component supply across multi-year production cycles.
Supply support for STM32F100CBT7B 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, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive semiconductors since 1987.
The STM32F100 value line targets cost-sensitive industrial and consumer applications requiring robust analog integration, low-power operation, and long-term supply stability - emphasizing Flash density, peripheral richness, and qualification for extended temperature ranges.
FAQ
What is the maximum operating temperature range for the STM32F100CBT7B?
The STM32F100CBT7B is rated for industrial temperature range: –40 °C to +105 °C. This specification is validated per ST's qualification standards (AEC-Q100 not applicable; industrial-grade stress testing performed), making it suitable for enclosed motor drives and outdoor metering enclosures without active cooling.
Does the STM32F100CBT7B support USB connectivity?
No, the STM32F100CBT7B does not include a USB peripheral. It provides USART, I²C, SPI, and CEC interfaces instead. For USB host/device functionality, designers must select from the STM32F102 or STM32F103 series, which integrate USB 2.0 FS controllers.
How many I/O pins are 5 V-tolerant on the STM32F100CBT7B?
Of its 37 GPIOs, all except PA13 (SWDIO), PA14 (SWCLK), and BOOT0 are 5 V-tolerant. This allows direct interfacing with 5 V sensors, logic-level shifters, and industrial I/O modules without external level translators - confirmed in Section 5.3.13 of the datasheet (DocID16455 Rev 9).
Can the internal 8 MHz RC oscillator be used as the system clock source?
Yes, the factory-trimmed 8 MHz internal RC oscillator can serve as the system clock source, with ±1% accuracy over temperature and voltage. It is enabled by default after reset and supports full peripheral operation - ideal for cost-sensitive designs where crystal omission is acceptable and timing precision is secondary to BOM reduction.
STM32F100CBT7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32F1
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 24MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- DMA, PDR, POR, PVD, PWM, Temp Sensor, WDT
- Number of I/O:
- 37
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 10x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F100CBT7B FAQ
1.How can I place an order for STM32F100CBT7B through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F100CBT7B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32F100CBT7B reliable?
The price and inventory of STM32F100CBT7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F100CBT7B is usually 5 days.
3.What payment methods are accepted for STM32F100CBT7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F100CBT7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F100CBT7B?
STM32F100CBT7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F100CBT7B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32F100CBT7B?
For technical support, including STM32F100CBT7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F100CBT7B requirements.
6.How does Aetrix verify that STM32F100CBT7B is sourced from the original manufacturer or authorized distributors?
All STM32F100CBT7B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32F100CBT7B meets industry standards.
7.What is the process for return or replacement of STM32F100CBT7B?
All STM32F100CBT7B units undergo pre-shipment inspection (PSI). If there is an issue with STM32F100CBT7B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32F100CBT7B part is unused and in its original packaging.
Return procedure for STM32F100CBT7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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