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STMicroelectronics STM32F103ZET7
- Part No.:
- STM32F103ZET7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 144-LQFP
- Datasheet:
-
STM32F103ZET7.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 144LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,411
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Product details
Overview
STM32F103ZET7 from STMicroelectronics is a high-density performance-line Arm® Cortex®-M3 microcontroller featuring 512 KB Flash, 64 KB SRAM, USB 2.0 full-speed interface, CAN 2.0B controller, and triple 12-bit ADCs (21 channels, 1 µs conversion). It operates at up to 72 MHz with 1.25 DMIPS/MHz performance and supports industrial motor control, PLC I/O modules, and USB-CAN bridge designs.
For engineers reviewing the STM32F103ZET7 datasheet, STM32F103ZET7 pinout, STM32F103ZET7 application, or STM32F103ZET7 equivalent, key selection criteria include Flash/SRAM capacity, 112 I/O count with 5 V tolerance, dual 12-bit DACs, FSMC support for external memory expansion, and integrated temperature sensor with calibration.
Technical Context
The STM32F103ZET7 implements a tightly coupled Arm Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, and hardware divide. Its nested vectored interrupt controller (NVIC) supports 68 maskable interrupts with configurable priority levels and low-latency response.
Peripheral integration includes a flexible static memory controller (FSMC) supporting NOR/PSRAM/NAND/CompactFlash, LCD parallel interface (8080/6800 modes), and dual watchdog timers (independent + window) with early-warning interrupt capability for safety-critical firmware supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M3, 72 MHz max - enables real-time deterministic execution of complex control algorithms with <1 µs ISR latency. |
| Memory | 512 KB Flash + 64 KB SRAM - sufficient for dual-bank firmware updates, large protocol stacks (USB/CAN), and real-time data buffering. |
| ADC | 3 × 12-bit, 1 µs, 21-channel - supports simultaneous sampling across multiple sensors in motor phase current monitoring or multi-zone environmental sensing. |
| DAC | 2 × 12-bit - provides precise analog output for closed-loop reference generation (e.g., voltage setpoints in power supplies). |
| I/O Count | 112 pins, 5 V-tolerant - allows direct interfacing with legacy industrial logic without level-shifting, reducing BOM cost and board space. |
| Communication | USB 2.0 FS + CAN 2.0B + 5×USART + 3×SPI + 2×I²C - enables hybrid wired connectivity for fieldbus gateways, diagnostic tools, and embedded HMI backends. |
| Timers | Up to 11 timers including 4×16-bit general-purpose, 2×motor-control PWM, 2×watchdog - supports advanced motor FOC, encoder position tracking, and fail-safe shutdown sequencing. |
Pinout & Package
LQFP144 package (20 × 20 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified. Pin count and layout optimized for signal integrity in mixed-signal industrial PCBs with dedicated VSSA/VDDA analog domains and separate VREF+ reference input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & Analog Power Supply | Separate 2.0–3.6 V domains isolate digital noise from precision ADC/DAC operation; VDDA must be ≥ VDD for valid analog performance. |
| PA0–PA15, PB0–PB15, etc. | General-Purpose I/O | All 112 GPIOs support remappable alternate functions (AFIO), external interrupts, and 5 V-tolerant inputs - simplifies routing and reuse across board revisions. |
| OSC_IN / OSC_OUT | External Crystal Interface | Supports 4–16 MHz quartz crystal for precise clock source; internal 8 MHz RC available for boot/startup before PLL lock. |
| USB_DP / USB_DM | USB 2.0 Full-Speed Interface | Dedicated differential pair with internal transceivers - eliminates need for external PHY; requires 1.5 kΩ pull-up on DP for device enumeration. |
| CAN_RX / CAN_TX | CAN 2.0B Physical Layer | Direct connection to external CAN transceiver (e.g., TJA1050); supports bit rates up to 1 Mbit/s with programmable sample point. |
| VREF+ | Analog Reference Input | Optional external 2.4–3.6 V reference for ADC/DAC - improves accuracy vs. internal VDDA-based reference under noisy supply conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Static Memory Controller (FSMC) | 4 chip-select outputs with configurable timing for NOR/PSRAM/NAND/CF - enables local HMI display buffers or firmware-over-the-air (FOTA) storage without external FPGA. |
| Temperature Sensor | Calibrated ±1.5°C accuracy (–40°C to 125°C) - provides system-level thermal monitoring for fan control or derating logic without external IC. |
| Serial Wire Debug (SWD) | 2-pin debug interface with trace capability - reduces debug footprint vs. JTAG; supports real-time variable watch and instruction trace via ETM. |
| Low-Power Modes | Sleep (20 µA), Stop (2 µA), Standby (1.3 µA) - extends battery life in portable diagnostics tools while retaining RTC and backup registers. |
| CRC Calculation Unit | Hardware-accelerated CRC-32 - offloads checksum computation from CPU during firmware update validation or communication frame integrity checks. |
Applications
| Industrial Motor Control | Programmable Logic Controller (PLC) I/O Module |
|---|---|
Use Scenario: Field-oriented control (FOC) of 3-phase BLDC motors with current sensing, position feedback, and thermal protection. IC Role / Device Role / Timing Role: Main controller executing PWM generation, ADC sampling, PID loops, and CAN-based command reception at ≤100 µs cycle time. Use Value: Integrated motor-control timers with dead-time insertion and emergency stop input eliminate external gate drivers and reduce system latency. |
Use Scenario: Modular digital input/output expansion unit with isolated 24 V DC sensing and relay/SSR drive capability. IC Role / Device Role / Timing Role: Central interface managing opto-isolated inputs, transistor outputs, CAN bus communication with main CPU, and local diagnostics. Use Value: 112 5 V-tolerant I/Os enable direct connection to industrial sensors/actuators; FSMC supports local configuration EEPROM or status display buffer. |
| USB-to-CAN Bridge Adapter | Embedded HMI Controller |
Use Scenario: PC-connected diagnostic tool converting USB CDC commands to CAN frames for automotive ECU programming and live data streaming. IC Role / Device Role / Timing Role: Dual-role interface bridging USB host-side enumeration and CAN message framing with timestamping and filtering. Use Value: On-chip USB and CAN peripherals eliminate external bridge ICs; 512 KB Flash stores multiple CAN database files (DBC) and firmware update images. |
Use Scenario: Local touchscreen interface for HVAC systems or building automation panels with graphics rendering and sensor data logging. IC Role / Device Role / Timing Role: Graphics controller driving parallel LCD (8080 mode), reading touch panel via ADC, and communicating via UART/USB to main controller. Use Value: LCD parallel interface + FSMC + triple ADC enables direct display driver integration and multi-sensor fusion without companion ASIC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F103ZGT6 | Same LQFP144 package, 1 MB Flash, identical peripherals - no SRAM increase (still 64 KB). | Required when firmware image size exceeds 512 KB (e.g., dual-application secure boot + OTA stack). | Select if future firmware growth or cryptographic libraries demand >512 KB code space; pin-compatible drop-in replacement. |
| STM32F407VGT6 | Cortex-M4F core, 168 MHz, 1 MB Flash, 192 KB SRAM, FPU, enhanced DSP instructions - larger die, different pinout (LQFP100). | Suitable for audio processing, floating-point math, or higher-throughput USB/CAN gateway applications. | Choose only when M3 performance or memory is insufficient; requires PCB redesign due to incompatible package and peripheral register mapping. |
Compared with STM32F103ZET7, the ZGT6 offers doubled Flash for complex firmware but same SRAM and core speed, while the F407VGT6 delivers 2.3× CPU performance and FPU at the cost of migration effort and higher power consumption.
Availability
STM32F103ZET7 is available at Aetrix Electronics and suitable for industrial motor control, PLC I/O modules, and USB-CAN bridge adapters requiring stable component supply across extended product lifecycles.
Supply support for STM32F103ZET7 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, specializing in microcontrollers, power management, sensors, and automotive ICs.
The STM32F1 series targets cost-sensitive, high-reliability industrial and consumer applications with balanced performance, rich analog/mixed-signal integration, and long-term availability - designed for seamless migration within the STM32 ecosystem.
FAQ
What is the maximum operating temperature range for STM32F103ZET7?
The STM32F103ZET7 is rated for industrial temperature range: –40°C to +85°C ambient. Its internal temperature sensor is calibrated across this range, and all electrical specifications (e.g., ADC accuracy, Flash write endurance) are guaranteed within these limits. Thermal derating is not required below 85°C.
Does STM32F103ZET7 support external memory interfaces beyond FSMC?
No - the only external memory interface is the Flexible Static Memory Controller (FSMC), which supports asynchronous/synchronous NOR, PSRAM, NAND, and CompactFlash. It does not include SDIO for SD cards (though SDIO peripheral exists, it lacks dedicated SD card controller logic) or PCIe, HyperBus, or Octo-SPI interfaces found in newer STM32 families.
Can STM32F103ZET7 run without an external crystal?
Yes - it boots using the internal 8 MHz factory-trimmed RC oscillator. The PLL can multiply this to 72 MHz. However, USB and CAN require precise clock sources: USB needs ±0.25% accuracy (achieved only with external 4–16 MHz crystal), and CAN bit timing stability benefits from crystal-derived clocks over RC.
How many independent PWM outputs can STM32F103ZET7 generate simultaneously?
It supports up to 28 independent PWM channels: four 16-bit general-purpose timers (each with up to 4 OC/PWM channels), two 16-bit motor-control timers (each with 3 complementary PWM outputs + dead-time), and two basic timers (each with 1 OC channel). All are fully configurable with programmable resolution and polarity.
STM32F103ZET7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 144-LQFP
- Series:
- STM32F1
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 72MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- DMA, Motor Control PWM, PDR, POR, PVD, PWM, Temp Sensor, WDT
- Number of I/O:
- 112
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 21x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F103ZET7 FAQ
1.How can I place an order for STM32F103ZET7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F103ZET7 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 STM32F103ZET7 reliable?
The price and inventory of STM32F103ZET7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F103ZET7 is usually 5 days.
3.What payment methods are accepted for STM32F103ZET7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F103ZET7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F103ZET7?
STM32F103ZET7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F103ZET7 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 STM32F103ZET7?
For technical support, including STM32F103ZET7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F103ZET7 requirements.
6.How does Aetrix verify that STM32F103ZET7 is sourced from the original manufacturer or authorized distributors?
All STM32F103ZET7 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 STM32F103ZET7 meets industry standards.
7.What is the process for return or replacement of STM32F103ZET7?
All STM32F103ZET7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F103ZET7, 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 STM32F103ZET7 part is unused and in its original packaging.
Return procedure for STM32F103ZET7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32F103ZET7 Tags
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