ISO7842DWR

Overview

The ISO7842DWR is a high-performance, reinforced quad-channel digital isolator from Texas Instruments. It features a 2/2 channel configuration with unidirectional signal flow and capacitive coupling isolation technology. The device supports data rates up to 100 Mb/s and offers an insulation voltage of 5700 Vrms. Operating within a supply voltage range of 2.25 V to 5.5 V, it draws a typical operating current of 13.7 mA. Key electrical parameters include a propagation delay of 11 ns and a power dissipation of 200 mW. It functions reliably across an extended temperature range from -55°C to +125°C and is housed in a 16-pin SOIC package.

Feature Summary

• Provides reinforced insulation with 5700 Vrms capability for enhanced safety compliance
• Integrates four independent channels with a 2-input/2-output configuration
• Utilizes capacitive coupling for reliable signal transmission across isolation barriers
• Supports high-speed data communication at rates up to 100 Mb/s

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced safety barriers
• Power metering applications with high-voltage interfaces
• Inverter drives and motor control circuits

Procurement Notes

Verify the specific suffix 'DWR' confirms the SOIC-16 package and tape-and-reel packaging format. Ensure the component meets RoHS standards as indicated by manufacturer specifications. Confirm that the 5700 Vrms rating aligns with your system's isolation requirements. Check for humidity sensitivity classification prior to storage and handling. Validate that the 100 Mb/s data rate suffices for your application's timing constraints.

Selection Notes

Select this component when a quad-channel isolator with a 2/2 split is required. It is suitable for designs needing 5700 Vrms reinforced isolation rather than basic isolation. Consider the 13.7 mA supply current for power budget calculations. The 11 ns propagation delay fits general-purpose high-speed interface needs. Ensure the 16-pin SOIC footprint matches the PCB layout constraints.

Part Context

This part belongs to the ISO784x family of digital isolators from Texas Instruments. It shares the same SOIC-16 package and core isolation technology with variants like the ISO7840 and ISO7841. The primary distinction lies in the channel configuration; while the ISO7840 offers four forward channels, the ISO7842 provides a balanced 2/2 split. This family targets applications demanding high reliability and compact form factors.

Replacement Considerations

The ISO7840DWR serves as a functional substitute if all four channels are needed in the forward direction. The ISO7841DWR is an alternative for asymmetric 3/1 channel configurations. All variants share identical pinouts and packaging, facilitating direct board-level swaps without schematic changes.