STMicroelectronics X-NUCLEO-OUT14A1

Overview

X-NUCLEO-OUT14A1 from STMicroelectronics is an industrial digital output expansion board for STM32 Nucleo development platforms, built around the ISO808A-1 octal high-side smart power switch. It delivers galvanically isolated 1.0 A per channel switching (9.2–36 V process side), 20 MHz SPI daisy-chain control, and integrated diagnostics including PGOOD, overtemperature, overload, and loss-of-ground protection.

For engineers reviewing the X-NUCLEO-OUT14A1 datasheet, X-NUCLEO-OUT14A1 pinout, X-NUCLEO-OUT14A1 application, or X-NUCLEO-OUT14A1 equivalent, this board enables rapid evaluation of isolated industrial digital output modules with Arduino® UNO R3 and Morpho connector compatibility, reverse-polarity protected supply rails, and dual-voltage logic interface (3.3 V / 5 V).

Technical Context

The board implements a complete galvanically isolated digital output stage using the ISO808A-1, which integrates eight high-side switches with embedded 2 kV_RMS isolation, fast decay for inductive loads, and comprehensive fault detection (overtemperature, overload, undervoltage lock-out, loss of ground). All channels share a single enable (OUT_EN) and are controlled via a 20 MHz SPI interface supporting daisy-chaining across multiple boards.

Logic-side interfacing is configurable for 3.3 V or 5 V operation, while the process-side supply range is adjustable between 10 V (J10 open) and 36 V (J9 open) via jumper settings. Diagnostic feedback includes dedicated LEDs for output status (green), PGOOD (red), overheating/communication error (red), and output enable (yellow), all mapped to physical jumpers (J3, J6, J7).

Key Specifications

Availability

X-NUCLEO-OUT14A1 is available at Aetrix Electronics and suitable for industrial PLC I/O module prototyping, STM32-based factory automation gateways, and isolated digital output subsystem validation requiring stable component supply, traceable sourcing, and long-term BOM continuity.

Supply support for X-NUCLEO-OUT14A1 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, power management, analog, and industrial ICs, with strong focus on embedded systems and industrial automation solutions.

The X-NUCLEO-OUT14A1 belongs to ST's X-NUCLEO ecosystem of STM32-compatible expansion boards, designed specifically to accelerate evaluation and integration of intelligent power switches (IPS) in industrial digital output applications.

FAQ

What microcontroller platforms is the X-NUCLEO-OUT14A1 compatible with?

The board is natively compatible with STM32 Nucleo development boards including NUCLEO-F401RE and NUCLEO-G431RB. It connects via Arduino® UNO R3 and Morpho headers, and supports direct GPIO/SPI interfacing without level-shifting when used with 3.3 V–5 V logic-supplied Nucleo boards.

How does daisy-chaining work across multiple X-NUCLEO-OUT14A1 boards?

Daisy-chaining uses the SPI_SS, SPI_MOSI, SPI_MISO, and SPI_CLK signals routed through dedicated DaisyChain pins. Two boards can be stacked to create a 16-channel isolated digital output system, with one board acting as master and the second as slave-no additional hardware or firmware modification required beyond SPI address handling.

What protections are implemented on the process and logic supply rails?

Both process-side (VIN) and logic-side (3.3 V / 5 V) supply rails include reverse polarity protection using discrete diodes (D1, D2, D4–D10). This prevents damage during incorrect power connection and ensures safe operation during lab evaluation and field prototype testing.

Can the X-NUCLEO-OUT14A1 operate standalone without a Nucleo board?

Yes-the board supports standalone operation with external 3.3 V or 5 V logic supply and 7–12 V auxiliary power for the Nucleo's MCU section, or full 9.2–36 V process-side operation. The ISO808A-1's VCC_EP pin accepts up to 5.5 V when used standalone, and all jumpers (J3, J6, J7, J9, J10) remain fully functional for configuration.