When a CAN FD upgrade puts a “5Mbps” transceiver on the purchase list, it is easy to assume that changing the chip completes the upgrade. ISO1042QDWVRQ1 deserves evaluation, but first establish which job it performs in the system and what else needs validation.

Understand the part’s role first

TI’s ISO1042-Q1 datasheet identifies ISO1042QDWVRQ1 as an automotive isolated CAN transceiver supporting classic CAN up to 1Mbps and CAN FD up to 5Mbps. VCC1 is 1.71–5.5V; VCC2 is 4.5–5.5V. This ordering code uses the 8-pin DWV SOIC package, with 1,000 units per reel listed in the manufacturer’s packaging table. Confirm whether the actual shipment is a full or partial reel.

A transceiver connects controller logic signals to the CANH/CANL physical bus. A CAN FD upgrade also involves the controller, firmware and network nodes; the transceiver’s data-rate specification does not establish complete system capability.

Why might the system still operate only in classic CAN?

Ask three questions: does the host have a CAN FD controller, is firmware configured for the required frame format and bit timing, and do the other nodes support the intended operating mode? If any answer is unconfirmed, arrange engineering review before making an installation promise.

Record the full host-controller part number, current communication mode and target mode alongside the BOM. Check suggested alternatives against those requirements. Two devices described as “CAN” do not necessarily share pinouts, supplies or functions.

Isolated-side power is an easily missed BOM item

ISO1042QDWVRQ1 does not include an isolated power supply for the bus side. If the design must maintain the isolation barrier, engineering should review the supply and grounding arrangement and include the necessary power components in the BOM. A 3.3V VCC1 connection does not establish that VCC2 can use the same voltage.

An RFQ can state: “In addition to the transceiver, please check whether the BOM includes the required bus-side supply components.” This is a completeness check; it does not authorize an unapproved power redesign.

Read isolation and protection ratings with their conditions

TI’s 5000Vrms isolation figure is a one-minute withstand test, not a continuous working-voltage claim. The ±70V DC bus-fault protection rating is also not a promise that the complete system survives every surge. Insulation, PCB layout and protection must be validated for the application.

What should procurement confirm before ordering?

  • Full ordering code: Keep ISO1042QDWVRQ1 on the purchase order rather than shortening it to ISO1042.

  • Package and footprint: Ask engineering to check the DWV mechanical drawing, pinout and board footprint. “SOIC” alone is insufficient for substitution approval.

  • Quantity and packaging: State full-reel or partial-reel needs, sample and production quantities, and label and lot-record requirements.

  • Automotive project requirements: Device qualification does not replace customer project approval. Agree on required shipment documentation before ordering.

  • Delivery terms: Obtain written confirmation of quotation validity, available quantity, expected shipment date and destination.

Evaluate more than one successfully transmitted frame

Have engineering define a sample-test matrix covering the target speed, intended cable and node arrangement, power transitions, and expected supply and temperature conditions. Record error counters, communication interruptions and recovery. Follow a short-cable bench test with validation under the actual network conditions.

This is sample-acceptance planning advice, not a claim that WOMAiELEC has performed those tests for the customer. Inspection scope, methods and acceptance criteria require prior agreement.

View the product and request a quote

Visit the ISO1042QDWVRQ1 product page and provide the full part number, quantity, packaging, lot and delivery requirements. Displayed pricing and quantities require supplier confirmation. Use the BOM page to organize associated components.

Manufacturer reference

TI ISO1042-Q1 datasheet. Reviewed November 14, 2026. Selection and substitutions require current manufacturer documentation and validation in the actual design.