ISO7221CDR

Overview

The ISO7221CDR is a dual-channel digital isolator manufactured by Texas Instruments, utilizing capacitive coupling technology for signal transmission. It features two independent channels with unidirectional data flow, supporting signaling rates up to 25 Mbps. The device operates within a supply voltage range of 2.8 V to 5 V and provides an isolation voltage rating of 2500 Vrms. Key electrical parameters include a maximum propagation delay of 42 ns and a typical rise/fall time of 1 ns. It is housed in an 8-pin SOIC package and is designed for operation across an extended temperature range from -40°C to +125°C.

Feature Summary

• Provides galvanic isolation between circuits using high-speed capacitive coupling technology.
• Supports bidirectional data communication through two independent unidirectional channels.
• Ensures signal integrity with low channel-to-channel output skew and minimal pulse-width distortion.

Applications

• General-purpose industrial automation systems requiring circuit isolation.
• Medical equipment interfaces needing reliable signal separation.
• Power management circuits involving isolated gate driving or sensing.

Procurement Notes

Verify the specific suffix 'CDR' to confirm the SOIC-8 package and tape-and-reel packaging configuration. Ensure compatibility with the required 2.8 V to 5 V supply voltage range for your target application. Confirm that the unidirectional channel orientation matches your system's signal flow requirements. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when a dual-channel solution with unidirectional data flow is required. It is suitable for applications demanding 25 Mbps data rates and 2500 Vrms isolation strength. Consider the 8-pin SOIC footprint for PCB layout constraints. Evaluate the 42 ns propagation delay against your timing budget to ensure signal synchronization meets system specifications.

Part Context

This part belongs to the ISO722x family of dual-channel digital isolators from Texas Instruments. The series offers various speed options including 1, 5, 25, and 150 Mbps variants. The ISO7221CDR specifically addresses general-purpose isolation needs with a focus on cost-effective performance and standard packaging formats for widespread integration.

Replacement Considerations

The ISO7221CDRG4 is listed as an alternative version within the same product line. Verify pinout and electrical parameter equivalence before substitution. No other direct substitute part numbers are confirmed in the provided documentation.