ISO7331CDW

Overview

The ISO7331CDW is a low-power triple-channel digital isolator manufactured by Texas Instruments. It provides galvanic isolation up to 3000Vrms for 1 minute per UL and 4242VPK per VDE standards. The device supports data rates of 25Mbps with a common-mode transient immunity (CMTI) of 25kV/µs. It operates on a supply voltage range of 3.15V to 5.5V and features a 16-SOIC package with a width of 0.295 inches (7.50mm). The channel configuration is 2 inputs to 1 output.

Feature Summary

• Provides high-speed signal transmission with 25Mbps data rate capability
• Offers robust galvanic isolation protection against electrical noise
• Features low power consumption suitable for energy-efficient designs
• Ensures high common-mode transient immunity for reliable operation

Applications

• Industrial automation systems requiring isolated communication
• Medical equipment needing safety-certified isolation
• Power metering applications with high-voltage interfaces
• Inverters and motor control circuits

Procurement Notes

Verify the specific ordering suffix to ensure the correct packaging format, as the base part number may correspond to tube packaging while variants like ISO7331CDWR indicate reel or cut tape options. Confirm that the component meets the required UL and VDE isolation certifications for your specific application safety standards. Check the datasheet for any recent product change notices regarding manufacturing sites or design updates.

Selection Notes

Select this component when a triple-channel isolator with 3000Vrms isolation is required. Ensure the system voltage falls within the 3.15V to 5.5V operating range. Consider the 16-SOIC package dimensions for PCB layout compatibility. Verify that the 25Mbps data rate meets the bandwidth requirements of the signals being transmitted across the isolation barrier.

Part Context

The ISO7331CDW belongs to the ISO733x family of low-power triple-channel digital isolators from Texas Instruments. This family includes variants such as the ISO7331, ISO7332, and ISO7334, which differ in channel directionality and count. These devices are designed to replace traditional optocouplers in modern industrial and communication applications, offering higher performance and lower power consumption.

Replacement Considerations

Direct substitutes include other members of the ISO733x family, such as the ISO7332CDW or ISO7334CDW, depending on the required channel directionality. Ensure that any replacement maintains the same 3000Vrms isolation rating and 16-SOIC package footprint to fit existing board layouts without modification.