STM32F103ZET6

STMicroelectronics STM32F103ZET6 — 32-bit ARM Cortex‑M3 MCU, 512 KB Flash, LQFP‑144

The STMicroelectronics STM32F103ZET6 is a high‑density STM32F1 series microcontroller built on the ARM Cortex‑M3 core, running up to 72 MHz. With 512 KB Flash, 64 KB SRAM, and a rich set of on‑chip peripherals including USB FS device, CAN, multiple USART/UART, SPI, I2C, 12‑bit ADCs, and timers/PWM, it targets industrial control, embedded systems, and connected devices that need dependable performance and extensive I/O in a compact LQFP‑144 package.

• Brand: STMicroelectronics
• MPN: STM32F103ZET6
• Series: STM32F1 (STM32F103 High‑Density)
• Category: Microcontrollers (MCU)
• Package: LQFP‑144 (Tray), Surface‑mount

Overview

The STM32F103ZET6 combines a 32‑bit ARM Cortex‑M3 core and abundant on‑chip memory with versatile connectivity to support a wide range of embedded control tasks. Operating up to 72 MHz and offering up to 112 I/O pins (package dependent), this device enables feature‑rich designs such as motor control nodes, human‑machine interfaces, and USB device implementations while maintaining low system complexity thanks to integrated peripherals.

Key characteristics that make the STMicroelectronics STM32F103ZET6 attractive for design teams include:

• Balanced compute and memory: ARM Cortex‑M3 core up to 72 MHz with 512 KB Flash and 64 KB SRAM
• High pin‑count flexibility: LQFP‑144 with up to 112 I/Os for broad periphery breakout
• Connectivity on board: USB FS device, CAN, USART/UART, SPI, and I2C for interfacing sensors, modules, and networks
• Industrial temperature capability: −40°C to +85°C operating range
• Proven STM32F1 platform: Common architecture across the STM32F103 High‑Density family simplifies reuse and scaling

Key Specifications

• CPU core: ARM Cortex‑M3
• Architecture: 32‑bit
• Max clock frequency: 72 MHz
• Program memory: 512 KB Flash
• SRAM: 64 KB
• Supply voltage (Vdd): 2.0 V to 3.6 V
• Package: LQFP‑144
• Pin count: 144
• I/O pins: up to 112 (package dependent)
• Peripherals: USB FS device, CAN, USART/UART, SPI, I2C, 12‑bit ADC, timers/PWM
• Operating temperature: −40°C to +85°C
• Mounting type: Surface Mount
• Packaging: Tray

Note: Parameter values above are taken from the provided part data. Where details are not specified in the datasheet extract, they are intentionally omitted.

Peripheral Highlights

• USB FS device: Enables direct connection as a USB peripheral for data transfer and control. Host/OTG modes are not specified in the provided data.
• CAN interface: Provides robust networked communication in industrial and automotive‑style nodes. Specific CAN revision or bitrate limits are not specified in the provided data.
• Multiple serial ports: USART/UART, SPI, and I2C to connect sensors, radios, storage, and expansion boards.
• 12‑bit ADCs: Suitable for general analog sensing and control loops. Number of channels and sampling rates are not specified in the provided data.
• Timers/PWM: Support for time‑base generation, capture/compare, and PWM motor/LED control. Detailed timer counts and features are not specified in the provided data.

Applications

The STMicroelectronics STM32F103ZET6 serves a broad spectrum of designs where dependable control and connectivity are needed:

• Industrial control and automation
• Embedded systems and general‑purpose control
• Consumer electronics
• USB device applications
• CAN‑networked nodes

Its combination of performance, Flash/SRAM size, and rich I/O makes it a versatile MCU choice for control panels, communication gateways, data loggers, and USB‑enabled accessories.

Package, Pinout, and Mounting

• Package: LQFP‑144
• Pin count: 144 pins, with up to 112 I/O pins (package dependent)
• Mounting: Surface Mount (SMT) for automated assembly
• Form factor advantages: High pin count facilitates breaking out multiple serial interfaces, ADC inputs, timers/PWM outputs, and GPIO while maintaining a compact board footprint typical of LQFP packages.

Refer to the datasheet for exact pin assignments, alternate pin functions, and layout recommendations. Specific pin multiplexing maps and pad characteristics are not provided here.

Power and Operating Conditions

• Supply voltage (Vdd): 2.0 V to 3.6 V
• Operating temperature: −40°C to +85°C
• Core frequency: Up to 72 MHz

For reliable operation across the full temperature range, follow the datasheet’s guidance on power decoupling, clock configuration, and operating conditions. Exact current consumption figures, low‑power modes, and oscillator options are not specified in the provided data.

Lifecycle, Supply, and Sourcing

• Lifecycle status: Active (per STMicroelectronics product page)
• Inventory quantity: 0 (current listing)
• Packaging: Tray

The STM32F103ZET6 remains Active, making it a viable choice for both new designs and sustainment of existing platforms. If you require immediate availability, consider planning for lead times and validating multiple authorized distribution channels. No specific drop‑in replacements are listed in the provided data; for second‑source evaluation within the STM32F103 High‑Density family, consult ST’s parametric tools and datasheet to verify functional and pin compatibility. Do not substitute without reviewing memory sizes, peripheral availability, and package pinout.

Compliance and Environmental

• RoHS: RoHS Compliant; lead‑free (per ST environmental declarations)
• REACH: Compliant (per ST environmental declarations)

Environmental and material compliance statements are available via ST’s official documentation. Always verify current compliance status with the manufacturer’s latest declarations before volume production.

Why Choose STMicroelectronics STM32F103ZET6?

• Mature, widely deployed STM32F1 platform with extensive ecosystem familiarity across engineering teams
• Balanced compute performance at up to 72 MHz for responsive control loops and protocol handling
• Ample program and data memory (512 KB Flash, 64 KB SRAM) for feature‑rich applications
• Broad connectivity on chip (USB FS device, CAN, serial interfaces) to reduce BOM and integration risk
• Industrial temperature range and a high‑pin‑count LQFP‑144 package to support complex, I/O‑heavy designs

Design and Integration Notes

• Clocking: Ensure the system clock configuration supports the required 72 MHz operation within the specified supply range. Specific oscillator requirements are not provided here; consult the datasheet.
• USB FS device: Verify circuit recommendations (e.g., connectors, resistors) from the datasheet for reliable USB device operation. Details such as crystal requirements or pull‑ups are not specified in the provided data.
• CAN: Follow reference layout practices for transceiver interfacing and EMC. Specific transceiver requirements and termination values are not provided here.
• Analog front‑end: For best ADC performance, adhere to layout and grounding guidance in the datasheet. Channel count and sampling parameters are not specified in the provided data.
• Power integrity: Use adequate decoupling and consider separate analog/digital supply routing as guided by ST’s application notes. Detailed current consumption is not specified in the provided data.

These considerations help ensure that the STM32F103ZET6’s capabilities are realized reliably in production hardware.

Frequently Asked Questions (FAQs)

Q: What CPU core does the STMicroelectronics STM32F103ZET6 use?
A: ARM Cortex‑M3.

Q: What is the maximum operating frequency?
A: Up to 72 MHz.

Q: How much memory is on the MCU?
A: 512 KB Flash and 64 KB SRAM.

Q: Which peripherals are integrated?
A: USB FS device, CAN, multiple USART/UART, SPI, I2C, 12‑bit ADC, and timers/PWM.

Q: What is the package and pin count for the STM32F103ZET6?
A: LQFP‑144 package with a total of 144 pins; up to 112 are available as I/O (package dependent).

Q: What supply voltage range does it support?
A: 2.0 V to 3.6 V.

Q: What is the operating temperature range?
A: −40°C to +85°C.

Q: Is the STM32F103ZET6 RoHS compliant?
A: Yes. It is listed as RoHS Compliant and lead‑free per ST environmental declarations.

Q: Is it REACH compliant?
A: Yes, per ST environmental declarations.

Q: Does it support USB host or OTG?
A: Not specified in the provided data. The listed capability is USB FS device.

Q: Are there specified drop‑in replacements?
A: None are listed in the provided data. Consult ST’s product selection and datasheets for potential pin‑compatible variants in the STM32F103 High‑Density family.

Resources

• Datasheet: https://www.st.com/resource/en/datasheet/stm32f103xe.pdf
• Product page: https://www.st.com/en/microcontrollers-microprocessors/stm32f103xe.html
• Environmental compliance information: https://www.st.com/en/quality-and-reliability/product-environmental-compliance.html

Summary

The STMicroelectronics STM32F103ZET6 delivers a capable balance of 72 MHz ARM Cortex‑M3 performance, 512 KB Flash, 64 KB SRAM, and a comprehensive peripheral set, all in a space‑efficient LQFP‑144 package. Its industrial temperature range, high I/O count, and on‑chip interfaces (USB FS device, CAN, UART/USART, SPI, I2C, 12‑bit ADC, timers/PWM) make it well‑suited for industrial control, consumer devices, and general‑purpose embedded systems. With an Active lifecycle status and RoHS/REACH compliance noted by ST, the STM32F103ZET6 is a strong candidate for both new designs and long‑term production—provided that specific timing, power, and interface requirements are validated against the official datasheet.