ISO7221MDR

Overview

The ISO7221MDR is a dual-channel digital isolator from Texas Instruments utilizing capacitive coupling technology. It supports signaling rates up to 150Mbps with a maximum propagation delay of 16ns and typical rise/fall times of 1ns. The device provides 2500Vrms isolation voltage and 25kV/µs common-mode transient immunity. Operating on a 3V to 5.5V supply, it functions within a temperature range of -40°C to 125°C. Packaged in an 8-SOIC surface-mount format, it ensures low channel-to-channel output skew and pulse-width distortion.

Feature Summary

• High-speed data transmission capability up to 150Mbps
• Robust noise immunity with 25kV/µs common-mode transient rejection
• Low signal distortion characteristics for precise timing

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment signal processing circuits
• Power metering and energy management interfaces

Procurement Notes

Verify the specific suffix 'MDR' corresponds to the tape-and-reel packaging configuration required for automated assembly processes. Confirm that the 150Mbps speed grade matches system timing requirements, as other variants in the ISO722x family offer different data rates. Ensure compatibility with the 3V to 5.5V logic levels used in the target application design.

Selection Notes

Select this component when high-speed bidirectional or unidirectional isolation is needed within an 8-pin footprint. Compare against lower-speed variants if power consumption is critical, noting that higher speeds may impact current draw. Validate that the 2500Vrms isolation rating meets safety standards for the specific voltage domains being separated in the circuit design.

Part Context

This part belongs to the ISO722x series of dual-channel digital isolators. It shares the same physical package and basic functionality with other speed grades like ISO7221AD (1Mbps) and ISO7221CD (25Mbps). The MDR suffix specifically denotes the reel packaging variant of the ISO7221M model, distinguishing it from cut-tape or tube options.

Replacement Considerations

ISO7221ADR serves as a lower-speed alternative offering 1Mbps performance. ISO7221CDRG4 provides a 25Mbps option within the same package. Verify pinout compatibility before substituting, as all share the standard SOIC-8 layout.