STMicroelectronics STEVAL-IFP031V1

Overview

STEVAL-IFP031V1 from STMicroelectronics is an evaluation board implementing an 8-channel high-side digital input termination with SPI serialization for PLC I/O modules, based on the CLT01-38SQ7 protected input IC. It delivers 78 mW per channel power dissipation, supports daisy-chain configuration, includes LED status indicators, and integrates a 5 V regulator with 30 V reverse polarity protection.

For engineers reviewing the STEVAL-IFP031V1 datasheet, STEVAL-IFP031V1 pinout, STEVAL-IFP031V1 application, or STEVAL-IFP031V1 equivalent, this board enables rapid validation of high-density, low-dissipation digital input architectures in industrial control systems requiring isolated/non-isolated bus interfacing and real-time state reporting via 6.25 MHz SPI.

Technical Context

The board implements the CLT01-38SQ7's 8-channel high-side current-limited input architecture with adjustable trip thresholds and integrated LED drivers per channel. It serializes input states via a 6.25 MHz SPI interface supporting both 8-bit and optional 16-bit mode with parity, temperature, and voltage alarms.

Daisy-chain capability is realized through dedicated MISO/MOSI/SCK/CS routing between boards, and dual-bus support (isolated and non-isolated) is enabled via the STEVAL-PCC009V2 adapter interface. The QFN48 package of the CLT01-38SQ7 is mounted on a 4-layer PCB with dedicated ground planes and ESD-protected input traces.

Key Specifications

Availability

STEVAL-IFP031V1 is available at Aetrix Electronics and suitable for industrial programmable logic controller (PLC) design, factory automation I/O module prototyping, and high-density digital input subsystem validation requiring stable component supply and repeatable evaluation platform access.

Supply support for STEVAL-IFP031V1 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 deep expertise in industrial automation and embedded control solutions.

The STEVAL-IFP031V1 belongs to ST's industrial evaluation board portfolio, designed specifically to accelerate development of robust, high-channel-count digital input modules for PLCs and distributed I/O systems.

FAQ

What is the primary function of the STEVAL-IFP031V1 evaluation board?

The STEVAL-IFP031V1 evaluates the CLT01-38SQ7 protected digital input IC in an 8-channel high-side configuration. It provides serialized SPI output of input states, onboard LED status indication, adjustable current limiting, and daisy-chain capability-enabling rapid validation of industrial digital input front-ends for PLC applications.

How does the board interface with a host microcontroller?

The board connects to a host MCU (e.g., STM32 via STEVAL-PCC009V2) using standard SPI signals: MOSI, MISO, SCK, and /CS. It supports both isolated and non-isolated bus configurations via its adapter interface, and allows daisy-chaining multiple boards using dedicated header pins routed for cascaded MISO propagation.

Does the board include reverse polarity and overvoltage protection?

Yes - the board inherits the CLT01-38SQ7's 30 V reverse polarity tolerance on all input channels. Input protection includes series resistors (2.2 kΩ), TVS diodes (SCR5–SCR8), and clamping circuitry. The integrated 5 V regulator also provides supply rail stabilization against transient overvoltage on the main Vcc line.

Can the board operate in both 8-bit and 16-bit SPI modes?

Yes - the CLT01-38SQ7 supports configurable SPI frame format. In 16-bit mode, the output includes parity bits, internal temperature monitoring, and supply voltage alarm flags. Mode selection is controlled via external configuration resistors and register settings accessible through the SPI interface.