ISOFACE™ digital input ICs

ISOFACE™ galvanically isolated digital 8-channel input ICs

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Overview

ISOFACE™ digital input ICs product family is an intelligent end-to-end system solution offering galvanic isolation between the microcontroller on the control side and the 24 V factory floor environment called the process side. ISOFACE™ product family offers high robustness for improved reliability as well as extensive diagnostic capabilities.

Key Features

  • Complete system integration
  • 8-channel input acc. to IEC61131-2
  • Integrated galvanic isolation
  • 3 V SPI & parallel MCU interface
  • Adjustable deglitching filters
  • 500 kHz sampling frequency 
  • Wire-break detection 
  • Vbb under-voltage detection
  • TSSOP-48, 8x12.5mm2

Products

About

ISOFACE™ isolated digital input ICs

ISOFACE™ digital input ICs provides a robust galvanic isolation of 500 VAC (EN60664-1, UL508) and allows up to four times more channels on the same PCB area compared to alternative solutions. The high integration density and low-power consumption of the ISOFACE™ digital input ICs enable highly compact industrial control products.

Setting the standard in diagnostics

The diagnostic capabilities of the ISO1I813T includes wire-break detection between the input ICs and the connected sensors or switches. It allows the microcontroller/bus-ASIC to identify the affected channel. The device also monitors the supply voltage (V bb missing voltage) and the error pin indicates when the input data is invalid. A pre-warning is issued if V bb falls below a certain limit (V bb under-voltage), enabling safe shutdown or mode change. Monitoring wire-break and V bb improves factory maintenance, minimizing costly unscheduled machine downtimes.

Highly integrated and flexible configurations for best-fit solutions

ISOFACE™ digital input ICs offers robust and intelligent solution designed to sample input data from digital sensors and switches. These input ICs can be directly connected to both digital inputs, such as sensors or switches, and the microcontroller or bus-ASIC, providing robust galvanic isolation as an integrated feature.

Flexible interfaces

ISOFACE™ digital input ICs offer connectivity to the microcontroller or bus-ASIC via high-speed SPI or parallel 8-bit interfaces. Daisy-chaining of multiple ICs is supported for compact system designs, and ISO1I813T ensures uncompromised data transfer with CRC-checking for serial communication.

System benefits of the ISOFACE™ digital input ICs

ISOFACE™ digital input ICs offer a range of features and benefits, including the ability to connect up to 8 IEC61131-2 type 1/2/3 inputs per IC. Their current sink characteristics reduce power dissipation by up to 2.5 times compared to resistive and opto-coupler solutions, enabling more compact input card designs.

To improve EMI robustness, the system solution includes adjustable deglitching filters for the 8 input channels. The ISO1I811T has four selectable settings via jumpers, while the ISO1I813T allows individual programming of filter settings for each channel. Both types offer a zero filter time bypass mode.

In addition, the ISOFACE™ digital input ICs support sampling rates of up to 500 kHz per input channel, significantly outperforming opto-coupler solutions. Ideal for high-precision or high-speed applications such as bottling and paper/printing.

Moreover, the ISO1I813T uniquely enables synchronous acquisition of input signals from multiple ICs, which is essential for obtaining isochronous time stamps in complex machinery or equipment.

ISOFACE™ isolated digital input ICs

ISOFACE™ digital input ICs provides a robust galvanic isolation of 500 VAC (EN60664-1, UL508) and allows up to four times more channels on the same PCB area compared to alternative solutions. The high integration density and low-power consumption of the ISOFACE™ digital input ICs enable highly compact industrial control products.

Setting the standard in diagnostics

The diagnostic capabilities of the ISO1I813T includes wire-break detection between the input ICs and the connected sensors or switches. It allows the microcontroller/bus-ASIC to identify the affected channel. The device also monitors the supply voltage (V bb missing voltage) and the error pin indicates when the input data is invalid. A pre-warning is issued if V bb falls below a certain limit (V bb under-voltage), enabling safe shutdown or mode change. Monitoring wire-break and V bb improves factory maintenance, minimizing costly unscheduled machine downtimes.

Highly integrated and flexible configurations for best-fit solutions

ISOFACE™ digital input ICs offers robust and intelligent solution designed to sample input data from digital sensors and switches. These input ICs can be directly connected to both digital inputs, such as sensors or switches, and the microcontroller or bus-ASIC, providing robust galvanic isolation as an integrated feature.

Flexible interfaces

ISOFACE™ digital input ICs offer connectivity to the microcontroller or bus-ASIC via high-speed SPI or parallel 8-bit interfaces. Daisy-chaining of multiple ICs is supported for compact system designs, and ISO1I813T ensures uncompromised data transfer with CRC-checking for serial communication.

System benefits of the ISOFACE™ digital input ICs

ISOFACE™ digital input ICs offer a range of features and benefits, including the ability to connect up to 8 IEC61131-2 type 1/2/3 inputs per IC. Their current sink characteristics reduce power dissipation by up to 2.5 times compared to resistive and opto-coupler solutions, enabling more compact input card designs.

To improve EMI robustness, the system solution includes adjustable deglitching filters for the 8 input channels. The ISO1I811T has four selectable settings via jumpers, while the ISO1I813T allows individual programming of filter settings for each channel. Both types offer a zero filter time bypass mode.

In addition, the ISOFACE™ digital input ICs support sampling rates of up to 500 kHz per input channel, significantly outperforming opto-coupler solutions. Ideal for high-precision or high-speed applications such as bottling and paper/printing.

Moreover, the ISO1I813T uniquely enables synchronous acquisition of input signals from multiple ICs, which is essential for obtaining isochronous time stamps in complex machinery or equipment.

Documents

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Design resources

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