IL 821-3TE

Overview

The IL 821-3TE is a general-purpose digital isolator manufactured by NVE Corp/Isolation Products. It features two channels with a unidirectional input configuration of one input and zero outputs on the secondary side. The device provides 2500Vrms isolation voltage and supports data rates up to 110Mbps. It exhibits a minimum common-mode transient immunity (CMTI) of 30kV/µs. The maximum propagation delay is 15ns for both low-to-high and high-to-low transitions, with a maximum pulse width distortion of 3ns. Typical rise and fall times are 1ns. The component operates within a supply voltage range of 3V to 5.5V and functions across an industrial temperature range of -40°C to 85°C. It is housed in an 8-SOIC package.

Feature Summary

• Utilizes IsoLoop technology based on giant magnetoresistive (GMR) sensing elements for signal transmission.
• Provides robust common-mode transient immunity rated at a minimum of 30kV/µs.
• Delivers high-speed data transmission capabilities supporting up to 110Mbps.
• Features a compact 8-SOIC surface-mount package design.

Applications

• General-purpose digital isolation in industrial control systems
• Signal isolation between microcontrollers and peripheral devices
• Noise reduction in mixed-signal environments

Procurement Notes

Verify the specific suffix '3TE' against official manufacturer documentation to confirm tape-and-reel packaging specifications and pinout orientation. Ensure compatibility with standard 8-SOIC footprints during PCB layout. Confirm that the 3V to 5.5V supply range aligns with target system logic levels. Validate thermal performance requirements against the specified -40°C to 85°C operating range for the intended application environment.

Selection Notes

Select this component when high-speed isolation exceeding 100Mbps is required alongside strong common-mode noise rejection. The GMR technology offers advantages over capacitive or optical alternatives regarding magnetic field sensitivity and long-term stability. Consider the 8-SOIC package constraints for board space. Evaluate the unidirectional channel configuration to ensure it matches the signal flow directionality of the specific circuit interface being isolated.

Part Context

The IL 821-3TE belongs to the IsoLoop family from NVE Corp/Isolation Products, which leverages spintronic giant magnetoresistance technology. This series distinguishes itself by offering high-speed digital isolation without the need for internal isolation capacitors or LEDs. The family includes various channel counts and package options, catering to diverse industrial and commercial applications requiring reliable galvanic isolation.

Replacement Considerations

Public confirmed substitute part numbers include IL712-3E and IL711V-1E. Verify pin compatibility and electrical parameters before substitution.