ISO1I811TXUMA1

Overview

The ISO1I811TXUMA1 is an eight-channel digital isolator from Infineon’s ISOFACE family, designed for industrial interfaces. It provides galvanic isolation between microcontrollers and field devices, supporting IEC 61131-2 Type 1/2/3 characteristics. The device operates on a single supply voltage ranging from 2.85 V to 5.5 V with a typical quiescent current of 4.5 mA. It features a propagation delay of 40 µs and a fall time of 55 ns. The component offers a basic insulation voltage of 500 Vrms and a common-mode transient immunity of 25 kV/µs. It is housed in a 48-TFSOP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Provides robust galvanic isolation for digital input signals in noisy industrial environments
• Supports IEC 61131-2 standard compatibility for direct connection to field sensors and actuators
• Features high common-mode transient immunity to maintain signal integrity under rapid voltage changes
• Integrates shutdown functionality to minimize power consumption during inactive periods

Applications

• Industrial automation control systems requiring safe signal transmission
• Automated Guided Vehicles (AGV) and robotics interface circuits
• Factory floor sensor networks connecting process side to control side
• PLC input modules needing isolated digital signal acquisition

Procurement Notes

Verify the specific suffix UMA1 confirms the tape-and-reel packaging format required for automated assembly processes. Ensure the order quantity aligns with the manufacturer's standard reel size to avoid partial reel handling issues. Confirm that the 48-TFSOP footprint matches the PCB design constraints. Validate compliance requirements against the RoHS certificate provided in the official documentation before finalizing procurement.

Selection Notes

Select this component when designing systems that require strict adherence to IEC 61131-2 standards for digital inputs. It is suitable for applications demanding high noise immunity in electrically harsh environments. Consider the 48-pin package density if space is limited but multiple isolated channels are necessary. Evaluate the thermal performance within the specified operating temperature range to ensure reliable long-term operation in industrial settings.

Part Context

This part belongs to the ISOFACE™ series of isolated industrial interfaces developed by Infineon Technologies. The series focuses on bridging the gap between low-voltage control electronics and high-noise factory floor equipment. The ISO1I811T variant specifically addresses the need for isolated digital inputs, distinguishing it from gate driver or output variants within the same product family.

Replacement Considerations

Check for ISO1I811T as the base part number variant. Verify pinout compatibility if substituting with other ISOFACE™ family members. Ensure any alternative maintains the same 48-TFSOP package dimensions and electrical isolation ratings.