ISO1042BQDWRQ1 - 5 Mbps Isolated CAN FD Transceiver | Texas Instruments
MPN: ISO1042BQDWRQ1 ✓ ActiveISO1042BQDWRQ1 Overview
A CAN transceiver is the physical-layer interface between a CAN controller and the differential CAN bus. It converts logic-level TXD and RXD signals into CAN bus levels and receives bus activity for the controller. Galvanic isolation places a robust communication barrier between the bus-side circuitry and the logic-side circuitry, helping prevent ground-potential differences and high-energy bus faults from propagating into sensitive electronic systems.
The ISO1042-Q1 family combines flexible data-rate operation with unusually strong bus fault tolerance. Its ±70 V DC bus fault protection exceeds the transient and fault voltages normally encountered in harsh vehicle environments, while the ±30 V common-mode range supports operation across nodes with significant ground offsets. CAN FD support allows higher payload throughput than classic CAN, helping reduce transfer time when larger data frames are needed.
The device is intended for automotive and industrial networks in which robust isolation, high fault tolerance, and deterministic communication are important. Suitable uses include electric-vehicle power electronics, vehicle body controllers, battery-management systems, industrial automation equipment, and isolated diagnostic interfaces. The wide fault range is especially useful in environments where wiring faults, load dump events, or ground shifts can stress connected nodes.
PCB layout is critical because the isolation barrier, bus traces, ground separation, and protection network must be implemented according to the manufacturer datasheet. Keep the isolated-side and logic-side copper regions separated, route the CANH and CANL pair as a balanced differential pair, and place bus-side protection components close to the connector. Maintain the specified creepage, clearance, capacitor, and termination arrangements to preserve isolation and communication reliability.
This page combines the manufacturer device description, ordering information, verified product links, application guidance, and practical design notes to help engineers evaluate the ISO1042BQDWRQ1 for isolated CAN FD nodes. It also identifies same-footprint family alternatives while clearly separating verified product facts from parameters requiring confirmation in the datasheet.
Drop-in alternatives for ISO1042BQDWRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ISO1042BQDWRQ1 (same form factor and footprint) — differing in Package, Product Type, Isolation Type, Automotive Qualification, Bus Fault Protection.
ISO1042BDWR
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →ISO1042DWVR
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →ISO1042BDWV
✅ Drop-In ⚠️ Specs Unverified✗ Out of Stock
$1.58 / Unit
View Datasheet →ISO1042BQDWRQ1 Specifications
| Product Type | Galvanically isolated CAN FD transceiver |
| CAN Standard | ISO11898-2 (2016) |
| Maximum CAN FD Data Rate | 5 Mbps |
| DC Bus Fault Protection | ±70 V |
| Common-Mode Voltage Range | ±30 V |
| Isolation Type | Galvanic isolation |
| Automotive Qualification | ISO1042-Q1 automotive family |
| Package | 16-pin SOIC |
| Mounting Type | Surface mount |
| Supported Protocol | CAN and CAN FD |
| Bus Interface | Differential CAN bus |
ISO1042BQDWRQ1 16-pin soic Pin Configuration Guide
Pin configuration for ISO1042BQDWRQ1 (16-pin soic package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ISO1042BQDWRQ1.
Refer to the datasheet for full pin configuration.
Typical Applications
ISO1042BQDWRQ1 is suitable for 6 applications: Electric Vehicle Power Electronics, Battery Management Systems, Vehicle Body and Chassis Controllers, Industrial Automation Networks, Isolated Diagnostics and Service Interfaces, Industrial and Automotive Sensor Networks.
Electric Vehicle Power Electronics
The ISO1042BQDWRQ1 fits isolated CAN FD links between an EV battery-management system, inverter controller, onboard charger, and vehicle domain controller. Its ±70 V DC bus fault protection and ±30 V common-mode range are valuable when wiring faults or ground-potential shifts occur in a high-power vehicle platform. The 5 Mbps CAN FD capability allows larger diagnostic, torque, and energy-flow payloads to transfer more quickly than classic CAN. Designers should place the transceiver’s bus-side protection and split network termination close to the connector, preserve the isolation barrier, and verify that every active node supports the selected CAN FD rate.
Recommended
Battery Management Systems
The ISO1042BQDWRQ1 supports isolated CAN FD communication between a battery-management controller and pack-monitoring or vehicle-control electronics. Its 5 Mbps maximum data rate is useful for frequent cell measurements, pack-state updates, and diagnostic information, while ±70 V DC bus fault protection improves robustness against faulted or miswired bus connections. The ±30 V common-mode range supports networks where separate ground domains may develop transient voltage offsets. Layout must keep the logic-side and bus-side copper areas apart, use a balanced CANH/CANL route, and follow the manufacturer’s isolation-capacitor and clearance guidance.
Recommended
Vehicle Body and Chassis Controllers
The ISO1042BQDWRQ1 can connect a body-control module, chassis controller, or gateway to a CAN FD network carrying door, lighting, braking, and diagnostic information. The 16-pin SOIC package supports compact controller-board designs, and the transceiver’s ±70 V DC bus fault protection provides margin for harsh wiring environments. CAN FD improves payload throughput for configuration exchange and diagnostic logs. Engineers should verify termination placement to avoid excessive bus loading, isolate test equipment from protected domains, and confirm that the selected microcontroller’s CAN FD controller timing matches the 5 Mbps maximum supported by this interface.
Recommended
Industrial Automation Networks
The ISO1042BQDWRQ1 is appropriate for isolated CAN FD links in industrial controllers, motor systems, and remote I/O where the bus may be exposed to ground offsets or wiring faults. Its 5 Mbps data rate supports high-volume machine commands and diagnostics, while the ±30 V common-mode range helps maintain reception across substantial ground differences. The ±70 V DC bus-fault rating adds protection for long cable runs and imperfect harnesses. A robust implementation still needs surge protection, common-mode chokes where appropriate, a defined grounding strategy, and validation of the system’s isolation and industrial transient requirements.
Recommended
Isolated Diagnostics and Service Interfaces
The ISO1042BQDWRQ1 can support a galvanically isolated CAN FD connection between diagnostic equipment and an embedded controller. Isolation limits fault-current paths between the service interface and the target electronics, while 5 Mbps CAN FD capability can shorten the time required to transfer logging, calibration, and status information. Its ±70 V DC bus fault protection is useful when the diagnostic harness is exposed to uncertain vehicle or industrial wiring conditions. Use only isolated test equipment when probing the logic side, and verify protocol addressing, baud-rate configuration, termination, and ground handling before performing live service communications.
Recommended
Industrial and Automotive Sensor Networks
The ISO1042BQDWRQ1 can bridge a CAN FD controller to distributed sensors and actuators that require communication across an isolation boundary. The 5 Mbps rate supports timely aggregation of measurements and commands, while ±70 V DC bus fault protection improves resilience against wiring errors. The ±30 V common-mode range helps operation across nodes with different local grounds. To preserve performance, maintain a continuous ground reference on each side of the isolation barrier, route CANH and CANL as a symmetrical differential pair, use suitable termination, and validate creepage and clearance against the working voltage and environmental requirements.
Recommended
Recommended Products Summary
Engineering reference data for ISO1042BQDWRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO1042BDWR | ISO1042DWVR | ISO1042BDWV |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOIC-16 (DW) | SOIC-16 (DW) | SOIC-16 (DW) | SOIC-16 (DW) |
| Product Type | Galvanically isolated CAN FD transceiver | Isolated CAN transceiver | Isolated CAN transceiver | Isolated CAN transceiver |
| Automotive Q1 Ordering Option | Yes | No Q1 suffix | No Q1 suffix | No Q1 suffix |
Key Differentiators
- Supports higher CAN FD payload throughput (vs ISO1042BDWR)
- Automotive ISO1042-Q1 ordering option (vs ISO1042DWVR)
- Strong DC bus fault and common-mode tolerance (vs ISO1042BDWV)
Design Notes
Preserve the isolation barrier by keeping logic-side and bus-side copper, components, and ground planes physically separated according to the TI ISO1042-Q1 datasheet. Route CANH and CANL as a short, balanced differential pair with a consistent ground reference, and place the optional split termination at the two ends of the bus rather than at every node. Review creepage, clearance, and isolation-capacitor placement before releasing the PCB.
Do not confuse the ISO1042BQDWRQ1 with ISO1042BQDRQ1. The latter is identified in the available cross-reference information as using a different package, so it cannot replace the 16-pin SOIC target without a board redesign. Likewise, verify the Q1 qualification suffix before substituting a non-Q1 ISO1042 variant in an automotive design, and compare the exact MPN electrical characteristics.
Provide clean, decoupled supplies for both sides of the isolation barrier and use the capacitor values and placement shown in the manufacturer datasheet. Do not connect the isolated-side and logic-side grounds together merely to simplify a test setup, because doing so removes the galvanic isolation. Verify startup behavior, bus recessive and dominant levels, and controller timing under the maximum intended CAN FD data rate.
Keep switching regulators, high-current drivers, oscillators, and other noisy sources away from the isolated bus interface. Maintain the recommended spacing around isolation components and use a symmetric CANH/CANL route to minimize radiated emissions and susceptibility. If conducted or radiated emissions exceed system limits, evaluate the manufacturer-recommended protection and filtering network rather than changing bus termination without checking the complete network topology.
Compliance Information
The ISO1042-Q1 family is identified as automotive, but the exact AEC-Q100 status and other compliance declarations must be confirmed from the manufacturer ordering and compliance information.