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STMicroelectronics STR752FR0T7
- Part No.:
- STR752FR0T7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STR752FR0T7.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,775
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Product details
Overview
STR752FR0T7 from STMicroelectronics is a 32-bit ARM7TDMI-S™ microcontroller with 256 KB Flash (Bank 0), 16 KB RWW Flash (Bank 1), 16 KB SRAM, integrated CAN 2.0B interface, USB Full-Speed (12 Mb/s), and six 16-bit timers including a motor-control PWM timer with dead-time generation and edge/center-aligned waveforms - deployed in industrial motor drives and embedded control systems requiring real-time I/O and dual-voltage (3.3V/5V) operation.
For engineers reviewing the STR752FR0T7 datasheet, STR752FR0T7 pinout, STR752FR0T7 application, or STR752FR0T7 equivalent, this device supports critical timing roles in brushless DC motor control, USB peripheral firmware, CAN-based industrial networks, and low-power embedded systems with RTC calendar and wake-up functionality.
Technical Context
The STR752FR0T7 integrates an ARM7TDMI-S core running at up to 60 MHz (54 DMIPS), with dedicated clock management including internal PLL (4/8 MHz crystal input), 32.768 kHz RTC oscillator support, and smart low-power modes (SLOW, WFI, STOP, STANDBY) retaining backup registers. Its nested interrupt controller delivers 32 vectors and 16 IRQ priorities with 2 FIQ sources.
Peripheral interconnect uses AHB/APB buses: AHB handles high-speed Flash/SRAM/USB/CAN access; APB manages UARTs, SSPs, I²C, ADC, and timers. The SMI enables boot-from-serial-Flash and direct code execution from up to 64 MB external serial memory, while DMA supports circular buffer transfers for UART0, SSP0, PWM, TIM0, and ADC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM7TDMI-S 32-bit RISC CPU @ 60 MHz, 54 DMIPS - enables deterministic real-time task scheduling in RTOS environments. |
| Flash Memory | 256 KB Bank 0 + 16 KB RWW Bank 1 (10k/100k write cycles, 20-yr retention @ 85°C) - supports field firmware updates without halting application execution. |
| ADC | 10-bit, 11-channel (LQFP64 package), 3.75 µs min conversion time - sufficient for fast current sensing in motor control loops. |
| CAN Interface | CAN 2.0B Active compliant, up to 1 Mbit/s, 32 message objects in RAM - enables robust node-level communication in industrial automation networks. |
| USB Interface | Full-Speed (12 Mb/s) device-only, software-configurable endpoints, 48 MHz clock derived internally - eliminates need for external USB oscillator. |
| I/O Count | 38 GPIOs with atomic bit SET/RES operations and high sink capability - simplifies direct LED/relay driving and reduces external logic. |
| Operating Voltage | 3.3 V ±10% or 5 V ±10% - allows direct interfacing with legacy 5V peripherals or modern 3.3V logic without level shifters. |
| Temperature Range | –40 °C to +85 °C ambient - validated for use in industrial enclosures without forced cooling. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad; pin-compatible with STR751FRx and STR750FVx series in same footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDD_IO | Digital power supply | Accepts single 3.3V or 5V source; internal regulators generate VCORE (1.8V) and VBACKUP - simplifies board power architecture. |
| OSC_IN / OSC_OUT | Crystal oscillator interface | Supports 4 MHz or 8 MHz fundamental-mode crystals for main clock; failure detection switches to internal RC (5 MHz) - improves system reliability. |
| PA0–PA15, PB0–PB15, PC0–PC7 | General-purpose I/O bank | 38 total GPIOs; alternate functions include CAN_RX/TX, USB_DP/DM, UART0–2, SSP0–1, I²C, TIMx, PWM - enables flexible peripheral mapping. |
| RTC_IN / RTC_OUT | Real-time clock oscillator | Connects to 32.768 kHz crystal for calendar/timekeeping and auto-wake from STOP mode - enables battery-backed timekeeping. |
| BOOT0 / BOOT1 | Boot mode selection | Configures boot source: internal Flash, external serial Flash via SMI, internal SRAM, or built-in bootloader - supports secure firmware recovery paths. |
Key Features
| Feature | Design Value |
|---|---|
| Motor Control PWM Timer | 16-bit, 6-channel synchronized output with programmable dead-time, edge/center-aligned waveforms, and emergency stop - directly drives 3-phase inverter gate drivers. |
| Serial Memory Interface (SMI) | Direct boot and code execution from up to 4 serial Flash devices (64 MB total) - eliminates external parallel memory and reduces BOM cost. |
| DMA Controller | 4-channel, circular buffer support for UART0, SSP0, PWM, TIM0, and ADC - offloads CPU during high-throughput data transfers (e.g., sensor logging). |
| Nested Interrupt Controller | 32 vectors, 16 priority levels, <12-cycle latency - ensures deterministic response to time-critical events like overcurrent fault signals. |
| Low-Power Modes | SLOW, WFI, STOP, STANDBY with SRAM/register retention in STOP - achieves <10 µA standby current while preserving context for rapid wake-up. |
| Flash Protection | Readout and write protection per sector - prevents unauthorized firmware extraction or accidental overwrite in deployed systems. |
Applications
| Brushless DC Motor Drive | Industrial CAN Node |
|---|---|
|
Use Scenario: Closed-loop speed/torque control of BLDC motors in HVAC blowers or pump systems. IC Role / Device Role / Timing Role: Real-time PWM generation, ADC sampling of phase currents, CAN messaging for command/status exchange. Use Value: Integrated 6-channel PWM with dead-time and synchronization eliminates external timer ICs; 11-channel ADC samples all three phases simultaneously. |
Use Scenario: Distributed I/O module in factory automation network communicating with PLC master. IC Role / Device Role / Timing Role: CAN protocol handler, sensor data aggregation, watchdog supervision, and local actuator control. Use Value: On-chip CAN 2.0B controller with 32-message RAM buffer handles burst traffic without CPU intervention; 38 GPIOs support discrete I/O expansion. |
| USB Human Interface Device | Programmable Logic Controller (PLC) Base Unit |
|
Use Scenario: Firmware-upgradable USB HID device such as industrial configuration tool or diagnostic dongle. IC Role / Device Role / Timing Role: USB device endpoint manager, Flash-based firmware storage, secure bootloader execution. Use Value: Internal 48 MHz USB clock eliminates external crystal; RWW Flash enables seamless firmware update without application interruption. |
Use Scenario: Compact standalone PLC controlling relays, reading analog sensors, and executing ladder logic. IC Role / Device Role / Timing Role: Main controller executing cyclic scan, managing I/O mapping, handling communication (UART/SSP), and maintaining RTC timestamp. Use Value: Dual-voltage support (3.3V/5V) interfaces directly with legacy 5V sensors and actuators; STOP mode enables low-power sleep between scan cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ARM7-based microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STR751FR0T6 | Same core/peripherals but 128 KB Flash (Bank 0), no CAN interface, 38 GPIOs - lacks CAN transceiver support and extended Flash for complex protocols. | Targeted at USB-only or UART/SSP-based control where CAN bus integration is unnecessary. | Select when CAN is not required and BOM cost reduction justifies smaller Flash and missing CAN PHY routing. |
| STM32F103C8T6 | Cortex-M3 core (72 MHz), 64 KB Flash, no CAN 2.0B (only CAN 2.0A), no SMI, no RWW Flash - higher performance but lacks serial Flash boot and motor PWM features. | Better suited for general-purpose control with Ethernet or USB Host; less optimal for CAN-based motor drive firmware with external Flash storage. | Choose for new designs prioritizing Cortex-M ecosystem tools and higher CPU throughput, accepting trade-offs in motor PWM precision and external memory flexibility. |
Compared with STR751FR0T6, STR752FR0T7 adds CAN 2.0B and doubles Flash capacity - essential for distributed control firmware with diagnostics and logging. Versus STM32F103C8T6, it offers superior motor PWM synchronization and SMI-based field-upgrade capability, albeit with lower clock speed and ARM7 toolchain requirements.
Availability
STR752FR0T7 is available at Aetrix Electronics and suitable for industrial motor drives, CAN-based automation nodes, USB peripheral firmware development, and programmable logic controller base units requiring stable component supply across extended product lifecycles.
Supply support for STR752FR0T7 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, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components.
The STR750 family was engineered specifically for industrial and appliance control applications demanding mixed-signal integration, dual-voltage I/O, CAN/USB connectivity, and robust Flash reliability - targeting motor drives, UPS systems, and programmable logic controllers.
FAQ
Does STR752FR0T7 support USB host functionality?
No. STR752FR0T7 implements only USB Full-Speed device mode (12 Mb/s), with software-configurable endpoints and suspend/resume support. It lacks USB host controller hardware, OTG capabilities, or VBUS sensing circuitry. For host applications, ST's USB-host-capable microcontrollers (e.g., STM32 OTG series) must be used instead.
Can STR752FR0T7 operate from a 5V supply while using USB?
No. USB operation requires VDD in the 3.3 V ±10% range. When powered from 5V, the internal voltage regulator generates VCORE, but the USB PHY is disabled. To use USB, the device must be supplied with 3.3V - either via Power Scheme 1 (single 3.3V) or Power Scheme 2 (external 3.3V + 1.8V).
What is the maximum ADC sampling rate achievable on STR752FR0T7?
The minimum conversion time is 3.75 µs per sample, enabling up to ~267 kSPS in single-channel mode. In scan mode with 11 channels, maximum aggregate rate is limited by sequencing overhead and DMA transfer latency - typical sustained throughput is ~100 kSPS across all enabled channels.
Is the STR752FR0T7 pin-compatible with other STR75x devices in LQFP64?
Yes. STR752FR0T7 shares identical pinout and electrical characteristics with STR751FRx and STR750FVx variants in LQFP64 package. Differences are limited to Flash size, peripheral enablement (e.g., CAN presence), and temperature grade - allowing drop-in replacement within same package variant for design reuse.
STR752FR0T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STR7
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM7®
- Core Size:
- 32-Bit Single-Core
- Speed:
- 60MHz
- Connectivity:
- CANbus, I2C, SPI, SSI, SSP, UART/USART
- Peripherals:
- DMA, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 11x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STR752FR0T7 FAQ
1.How can I place an order for STR752FR0T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STR752FR0T7 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 STR752FR0T7 reliable?
The price and inventory of STR752FR0T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STR752FR0T7 is usually 5 days.
3.What payment methods are accepted for STR752FR0T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STR752FR0T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STR752FR0T7?
STR752FR0T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STR752FR0T7 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 STR752FR0T7?
For technical support, including STR752FR0T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STR752FR0T7 requirements.
6.How does Aetrix verify that STR752FR0T7 is sourced from the original manufacturer or authorized distributors?
All STR752FR0T7 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 STR752FR0T7 meets industry standards.
7.What is the process for return or replacement of STR752FR0T7?
All STR752FR0T7 units undergo pre-shipment inspection (PSI). If there is an issue with STR752FR0T7, 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 STR752FR0T7 part is unused and in its original packaging.
Return procedure for STR752FR0T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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