STMicroelectronics STR755FV0T6

Overview

STR755FV0T6 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 and USB Full-Speed interfaces, and a motor-control-optimized 6-channel PWM timer. It operates at up to 60 MHz, supports dual supply (3.3 V ±10% or 5 V ±10%), and targets industrial motor drives requiring synchronized timing, real-time communication, and embedded firmware execution.

For engineers reviewing the STR755FV0T6 datasheet, STR755FV0T6 pinout, STR755FV0T6 application, or STR755FV0T6 equivalent, key selection criteria include its LQFP64 package, 38 GPIOs with atomic bit-set/reset, 11-channel 10-bit ADC (3.75 µs min conversion), CAN+USB coexistence capability, and support for SMI boot from external serial Flash.

Technical Context

The STR755FV0T6 implements an ARM7TDMI-S core with 54 DMIPS @ 60 MHz, paired with a nested interrupt controller supporting 32 vectors and 16 IRQ priorities. Its clock system integrates a 4/8 MHz crystal oscillator, internal RC startup oscillator (~5 MHz), PLL for AHB/USB/APB derivation, and dedicated 48 MHz USB clock generation - all without external components.

Peripheral integration includes three synchronizable 16-bit standard timers (TIM0–TIM2), one 16-bit watchdog, one timebase timer, and a dedicated 16-bit 6-channel motor-control PWM timer with dead-time insertion, edge/center-aligned waveforms, and emergency stop. The CAN interface complies fully with ISO 11898-1:2003 (2.0B Active) and supports both standard (11-bit) and extended (29-bit) frames at up to 1 Mbit/s.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature range (−40 to +85 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit ARM-based microcontroller applications.

Compared with STM32F103C8T6 and LPC2368, the STR755FV0T6 uniquely delivers CAN+USB coexistence in LQFP64, integrated motor-control PWM with dead-time, and bootable SMI - making it purpose-fit for space-constrained industrial nodes requiring concurrent fieldbus and service connectivity.

Availability

STR755FV0T6 is available at Aetrix Electronics and suitable for brushless motor drives, industrial CAN nodes, USB diagnostic tools, and compact PLC modules requiring stable component supply across extended product lifecycles.

Supply support for STR755FV0T6 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 STR750 family was designed specifically for industrial motor control and fieldbus-connected embedded systems, integrating CAN, USB, advanced PWM, and robust Flash architecture to replace discrete MCU+peripheral solutions.

FAQ

Does STR755FV0T6 support simultaneous CAN and USB operation?

Yes - unlike earlier STR750 variants in LQFP64, the STR755FV0T6 explicitly supports concurrent CAN and USB operation per ST's device overview table and electrical characteristics section. This requires 3.3 V supply (USB constraint) and proper PCB layout isolation between CAN transceiver ground and USB signal integrity zones.

What is the maximum ADC sampling rate achievable with DMA and scan mode?

With 11 channels scanned sequentially and minimum 3.75 µs conversion time, the theoretical maximum sustained sampling rate is ~23.8 kSPS (11 × 3.75 µs). DMA reduces CPU overhead, enabling continuous background acquisition into circular buffers without interrupt latency penalties.

Can STR755FV0T6 boot directly from external serial Flash via SMI?

Yes - boot mode pins configure SMI as primary boot source. The SMI interface supports up to four serial Flash devices (total 64 MB), with automatic address translation and burst-read optimization. Boot code executes directly from SMI-mapped memory without copying to internal Flash or RAM.

Is the internal 1.8 V regulator used when operating from 3.3 V supply?

Yes - in Power Scheme 1 (single 3.3 V), the internal main voltage regulator generates VCORE (1.8 V) from VDD, while the low-power regulator supplies V18_BKP from VDD_IO. This eliminates need for external 1.8 V regulators and simplifies power design for cost-sensitive industrial applications.