STMicroelectronics STEVAL-IFP042V1

Overview

STEVAL-IFP042V1 from STMicroelectronics is an industrial digital output expansion board based on the ISO808AQTR octal high-side smart power solid-state relay in TFQFPN32 package, featuring 2.5 kVRMS galvanic isolation, 20 MHz SPI daisy-chaining interface, and 0.7 A per-channel drive capability for inductive loads. It operates with 10–33 V process-side supply (J10 open/J9 closed) and 3.3–5 V logic-side voltage, targeting PLC I/O module evaluation.

For engineers reviewing the STEVAL-IFP042V1 datasheet, STEVAL-IFP042V1 pinout, STEVAL-IFP042V1 application, or STEVAL-IFP042V1 equivalent, key selection considerations include SPI-controlled 8-channel high-side switching, embedded overload/overtemperature/loss-of-ground protection, reverse polarity protection on both supply rails, and Arduino® UNO R3 + STM32 Nucleo compatibility.

Technical Context

The board implements a galvanically isolated digital output stage using the ISO808AQTR, which integrates eight independent high-side switches with fast decay control for inductive loads and PGOOD monitoring of VCC. Its SPI interface supports 20 MHz clock rate and daisy-chain configuration across multiple boards for up to 16-channel systems.

Process-side voltage range is configurable via jumpers J9/J10 (9.2–36 V extended, 10–33 V default), while logic-side supply accepts 3.3 V or 5 V. LED indicators provide real-time status for output enable (yellow), PGOOD (red), communication fault/overheating (red), and individual channel ON/OFF (green).

Key Specifications

Availability

STEVAL-IFP042V1 is available at Aetrix Electronics and suitable for industrial PLC I/O module development, STM32-based automation prototyping, and isolated digital output subsystem validation requiring stable component supply and rapid evaluation capability.

Supply support for STEVAL-IFP042V1 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, designing and manufacturing microcontrollers, power management ICs, analog chips, and sensors for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL evaluation platform family, engineered to accelerate validation of intelligent power switching solutions-specifically high-side drivers with embedded diagnostics and isolation for industrial control systems.

FAQ

What microcontroller platforms is STEVAL-IFP042V1 compatible with?

STEVAL-IFP042V1 is natively compatible with STM32 Nucleo boards (e.g., NUCLEO-F401RE and NUCLEO-G431RB) via GPIO and Morpho connectors, and supports Arduino® UNO R3 pinout through dedicated headers. It requires no additional level-shifting when used with 3.3 V or 5 V logic-supplied hosts.

How does daisy-chaining work across multiple STEVAL-IFP042V1 boards?

Daisy-chaining uses the SPI SDO (serial data out) of one board connected to the SPI SDI (serial data in) of the next, sharing CLK, SS, and MISO lines. Two stacked boards support 16-channel coordinated control with single-master SPI timing, enabled by ISO808AQTR's native daisy-chain architecture.

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

Both supply rails feature reverse polarity protection diodes. The process side includes undervoltage lock-out and loss-of-ground detection; the logic side adds overvoltage clamping via TVS devices (SM15T39CA, ESDA15P60-1U1M). Thermal shutdown and current limiting are handled internally by the ISO808AQTR.

Can STEVAL-IFP042V1 drive inductive loads safely?

Yes-each channel incorporates fast decay circuitry to manage back-EMF during turn-off. Combined with 260 mΩ max RON and thermal foldback, it safely switches solenoids, relays, and valves rated ≤0.7 A at ≤36 V, as validated in ST's application notes for ISO808A-based digital output modules.