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Best Alternatives to CA-IS3721LS

Package: SOIC-8ChipanalogDigital IsolatorsNumber of Channels: 2Data Rate: 150 MbpsIsolation Voltage: 3.75 kVrmsSupply Voltage: 2.5 V to 5.5 VPropagation Delay: 8 ns

CA-IS3721LS is a high-speed 2-channel digital isolator. Alternatives require pinout, channel direction, and fail-safe review.

AI replacement insight

Electrical riskmedium

Fail-safe and direction matter.

Package risklow

Kept parts are SOIC-8.

Firmware risklow

No protocol firmware implied.

Sourcing riskmedium

Stock not provided.

Can it be replaced directly?

No pin-compatible replacement is verified from the provided evidence.

Best replacement path

Start with CA-IS3722LS for same-family review, then verify pin table.

Main risk

Pinout and channel direction can block a board-level swap.

Recommended alternatives

2
CA-IS3722LS package
CA-IS3722LS

Chipanalog

Needs validationmedium risk

CA-IS3722LS is a same-family functional option with pinout caveats.

View details

Alternative comparison matrix

Feature / factorCA-IS3721LSCA-IS3722LSNSI8120N0Alt 3Compatibility / risk
PackageSOIC-8SOIC-8SOIC-8SOIC-8 — same package name; NSI8120N0: same package name
PinoutCA-IS3721LSCA-IS3722LSunknownCA-IS3722LS / unknown — web says pin placement differs; NSI8120N0: no pin table evidence
Voltage3.75kVrms, 2.5-5.5V3.75kVrms, 2.5-5.5V3.75kVrms, 2.5-5.5V3.75kVrms, 2.5-5.5V — ratings match; NSI8120N0: ES ratings match
Interface2ch 150Mbps 1F/1R low2ch 150Mbps 1F/1R low2ch 150Mbps low2ch 150Mbps 1F/1R low / 2ch 150Mbps low — ES match; NSI8120N0: direction missing
Temperaturemissing-40 to 125C-40 to 125C-40 to 125C — target temp absent; NSI8120N0: target temp absent

Application & sourcing insights

Questions & answers

CA-IS3722LS is the closest provided option, but it needs pinout review.