STMicroelectronics STEVAL-IFP007V1

Overview

STEVAL-IFP007V1 from STMicroelectronics is a 16-bit PLC digital input demonstration board based on two SCLT3-8 protected digital input ICs in daisy-chained SPI configuration, supporting IEC61131-2 Type 1 and Type 3 inputs, integrated current limiting, per-channel digital filtering, and thermal alarm reporting for industrial automation systems.

For engineers reviewing the STEVAL-IFP007V1 datasheet, STEVAL-IFP007V1 pinout, STEVAL-IFP007V1 application, or STEVAL-IFP007V1 equivalent, this board enables rapid evaluation of high-density 24 VDC digital input interfaces with serialized state transfer, galvanic isolation readiness, and real-time fault diagnostics including under-voltage and parity error detection.

Technical Context

The board implements dual SCLT3-8 devices sharing a single SPI bus in daisy-chain topology, enabling 16-channel status readout with minimal MCU interface lines. Each SCLT3-8 integrates eight independent input channels with programmable current limit (typ. 5 mA), internal voltage regulator (5 V), and dedicated thermal alarm output.

Input conditioning complies with IEC61131-2 Type 3 (24 VDC, 3–5 mA sink), includes RC termination networks per channel, and supports serial data transfer with embedded status bits: channel state, thermal alarm, under-voltage flag, and parity bit - all accessible via standard SPI commands (CPOL=0, CPHA=0).

Key Specifications

Availability

STEVAL-IFP007V1 is available at Aetrix Electronics and suitable for industrial PLC development, factory automation prototyping, and IEC61131-2-compliant digital input validation requiring stable component supply and traceable evaluation hardware.

Supply support for STEVAL-IFP007V1 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 & mixed-signal devices, and industrial interface solutions.

The STEVAL-IFP007V1 belongs to ST's Industrial Evaluation Board portfolio, developed specifically to accelerate validation of programmable controller digital input architectures with robust noise immunity, fault diagnostics, and scalable channel density.

FAQ

What is the maximum operating temperature range for STEVAL-IFP007V1 during evaluation?

The board operates reliably from –40 °C to +85 °C ambient, matching the SCLT3-8 IC's industrial-grade rating. Thermal alarm activation occurs at chip junction temperature ≥150 °C, and the board's layout includes copper pour and thermal vias to sustain continuous 24 VDC input operation under full 16-channel load.

Does STEVAL-IFP007V1 support galvanic isolation out-of-the-box?

No, the board does not include built-in galvanic isolation components. However, its SPI interface and input signal paths are designed with isolation-ready routing: separate GND planes, isolated connector footprints (CN1–CN4), and provisioned pads for external optocouplers or digital isolators on SPI lines and input returns.

Can STEVAL-IFP007V1 be used with microcontrollers other than ST's STM32 family?

Yes - it is fully compatible with any SPI master capable of CPOL=0/CPHA=0 timing and 3.3 V or 5 V logic levels. The board's SCLT3-8 devices respond to standard 16-bit read commands regardless of host MCU architecture, and reference firmware examples exist for ARM Cortex-M, PIC, and AVR platforms.

How is channel addressing handled when two SCLT3-8 ICs are daisy-chained?

Channel addressing is sequential: SCLT3-8 U1 reports IN0–IN7 (bits D0–D7), and U2 reports IN8–IN15 (bits D8–D15) in a single 16-bit SPI read response. No chip-select arbitration is needed - both devices shift out their 8-bit status words back-to-back on the same MISO line during one transaction.