STMicroelectronics B-STLINK-VOLT

Overview

B-STLINK-VOLT from STMicroelectronics is a voltage adapter board for the STLINK-V3SET modular debug probe, enabling 1.65 V–3.3 V level shifting across SWD, SWV, JTAG, VCP (UART), and bridge (SPI/UART/I²C/CAN/GPIO) signals. It supports STM32 microcontroller targets operating below 3.3 V and integrates directly into the STDC14-connector-based STLINK-V3SET casing or between MB1441 and MB1440 adapter boards.

For engineers reviewing the B-STLINK-VOLT datasheet, B-STLINK-VOLT pinout, B-STLINK-VOLT application, or B-STLINK-VOLT equivalent, this module addresses low-voltage target compatibility, signal integrity preservation during level translation, and seamless integration with ST's modular debugging ecosystem - especially when interfacing with sub-3.3 V STM32 MCUs in production programming or lab validation.

Technical Context

The B-STLINK-VOLT implements bidirectional logic-level translation for multiple protocol domains: debug (SWD/SWV/JTAG), virtual COM port (UART), and bridge peripherals (SPI/UART/I²C/CAN/GPIO). Each signal path uses dedicated level-shifter ICs rated for 1.65 V–3.3 V operation.

It operates within 0 °C to 50 °C ambient temperature and is mechanically designed for direct insertion into the STLINK-V3SET enclosure via the STDC14 connector or as an interposer between MB1441 and MB1440 boards - no firmware or configuration required.

Key Specifications

Availability

B-STLINK-VOLT is available at Aetrix Electronics and suitable for STM32 low-voltage debug validation, production programming line integration, and modular probe customization requiring stable component supply and traceable sourcing.

Supply support for B-STLINK-VOLT 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 specializing in microcontrollers, analog ICs, power management, and embedded solutions for automotive, industrial, and consumer applications.

B-STLINK-VOLT belongs to ST's STLINK-V3 modular debug ecosystem, designed specifically to extend voltage compatibility and signal fidelity for STM32-based development and manufacturing workflows.

FAQ

Is B-STLINK-VOLT required for STM8 microcontrollers?

No. STM8 targets are supported natively by the baseline MB1440 adapter board included with STLINK-V3SET; B-STLINK-VOLT is exclusively intended for STM32 devices operating below 3.3 V, where on-board voltage adaptation is not provided by MB1440.

Can B-STLINK-VOLT be used standalone without STLINK-V3SET?

No. B-STLINK-VOLT has no onboard debugger MCU or USB interface - it functions only as a passive level-shifting interposer between STLINK-V3SET (MB1441) and either the STDC14 connector or MB1440 adapter board. It requires STLINK-V3SET for power, host communication, and debug protocol handling.

Does B-STLINK-VOLT support CAN FD or high-speed I²C modes?

No. The board performs voltage translation only - it preserves signal timing but does not modify protocol speed or encoding. CAN FD and high-speed I²C (≥1 MHz) depend entirely on STLINK-V3SET firmware and target MCU capabilities, not B-STLINK-VOLT hardware.

What is the purpose of the closed casing feature?

The closed casing design ensures mechanical and EMI integrity when B-STLINK-VOLT is installed inside the STLINK-V3SET housing via the STDC14 connector. This maintains probe ruggedness, prevents accidental disconnection, and meets ST's form-factor compliance for field-deployable debug tools.