ISO7842DW

Overview

The ISO7842DW is a high-performance, quad-channel digital isolator manufactured by Texas Instruments. It features reinforced isolation certifications with an insulation voltage of 5700 Vrms and a peak isolation voltage of 8000 VPK. The device supports data rates up to 100 Mbps and offers a common-mode transient immunity (CMTI) of 100 kV/µs. It operates within a supply voltage range of 2.25 V to 5.5 V and functions across an extended temperature range from -55°C to +125°C. Packaged in a 16-pin SOIC (0.295 inch width), it provides bidirectional signal transmission with low propagation delay.

Feature Summary

• Reinforced dual-channel isolation certification for safety-critical applications
• High common-mode transient immunity of 100 kV/µs ensures reliable signal integrity
• Quad-channel architecture enables efficient space-constrained PCB designs
• Capacitive coupling technology provides robust noise rejection

Applications

• Medical equipment requiring reinforced isolation
• Industrial automation and control systems
• Power metering and energy management interfaces
• Automotive gate driver circuits

Procurement Notes

Verify the package type matches the required 16-SOIC footprint with a 7.50 mm width. Confirm the insulation voltage rating of 5700 Vrms meets system safety standards. Check for UL recognition or VDE certification marks if regulatory compliance is mandatory. Ensure the operating temperature range covers the intended environmental conditions. Validate pinout compatibility during schematic capture to prevent layout errors.

Selection Notes

Select this component when reinforced isolation is required rather than basic isolation. Consider the 100 Mbps data rate limit for high-speed interface needs. Evaluate the 13.7 mA typical supply current against power budget constraints. Compare CMTI performance against noisy environments where standard isolators may fail. Assess the 16-pin SOIC package size relative to available board real estate.

Part Context

This part belongs to the ISO784x family of digital isolators from Texas Instruments. It shares architectural similarities with the ISO7840 and ISO7842 variants but differs in channel configuration and isolation ratings. The DW suffix denotes the tube packaging format for the 16-SOIC case. It serves as a general-purpose solution for replacing optocouplers in modern isolated communication links.

Replacement Considerations

The ISO7842DWR is the reel-packaged equivalent of this component. Verify that the replacement maintains the same 16-SOIC physical dimensions. Ensure the electrical parameters, including propagation delay and supply voltage, remain identical. Confirm that the packaging change does not affect automated assembly processes.