ISO7842DWWR

Overview

The ISO7842DWWR is a high-performance, quad-channel digital isolator manufactured by Texas Instruments. It features reinforced isolation with an 8000-VPK isolation voltage and 5700 Vrms insulation rating. The device supports data rates up to 100 Mbps and offers a common-mode transient immunity of 100 kV/µs. It operates on a supply voltage range of 2.25 V to 5.5 V with a typical operating current of 13.7 mA. The component provides unidirectional signal transmission across four channels (2 forward, 2 reverse) using capacitive coupling technology. It is housed in a 16-SOIC package and functions within a temperature range of -55°C to +125°C.

Feature Summary

• Reinforced isolation certification for safety-critical applications
• High common-mode transient immunity of 100 kV/µs
• Capacitive coupling technology for reliable signal transmission
• Wide supply voltage range supporting level translation

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced isolation standards
• Power metering and energy management interfaces
• Automotive electronics with high noise environments

Procurement Notes

Verify the specific suffix 'DWWR' corresponds to the tape-and-reel packaging configuration when ordering. Confirm that the reinforced isolation ratings meet the safety requirements of your target application. Ensure compatibility with the 16-SOIC footprint during PCB layout. Check for moisture sensitivity levels if storage conditions exceed specified limits. Validate that the 100 Mbps signaling rate aligns with system timing constraints.

Selection Notes

Select this component when reinforced isolation is mandatory rather than basic isolation. Consider the 100 Mbps speed limit against higher-speed alternatives if data throughput exceeds requirements. Evaluate the 13.7 mA power consumption against battery-operated constraints. The 16-SOIC package requires adequate creepage distance on the PCB to maintain the 14.5 mm isolation barrier. Ensure the 2.25 V to 5.5 V supply range matches the logic levels of connected devices.

Part Context

The ISO7842DWWR belongs to the ISO7842 family of quad-channel digital isolators from Texas Instruments. This series utilizes capacitive coupling technology to provide electrical isolation between circuits. The device is designed for applications requiring robust noise immunity and high reliability. It complements other interface solutions by offering integrated isolation without external magnetics.

Replacement Considerations

Direct replacements include the ISO7842DWW variant, which differs primarily in tube packaging instead of reel. Verify pinout compatibility and isolation ratings before substitution. No other direct cross-model substitutes are confirmed in public documentation.