ISO1042QDWVRQ1 - Isolated CAN Transceiver 5Mbps 8-SOIC | TI
MPN: ISO1042QDWVRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.3 | $5.30 |
| 10 | $4.77 | $47.70 |
| 100 | $3.71 | $371.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.78 | $2,780.00 |
| 2,500 | $2.55 | $6,375.00 |
ISO1042QDWVRQ1 Overview
An isolated CAN transceiver is a type of bus interface IC that combines a standard CAN physical-layer transceiver with on-chip galvanic isolation. The ISO1042QDWVRQ1 sits between a microcontroller's CAN controller and the physical CAN bus, eliminating ground loops, blocking high common-mode transients, and protecting low-voltage domain circuitry from hazardous bus-side faults. In the broader taxonomy, this device is an isolated transceiver -> CAN transceiver -> bus interface IC -> interface IC -> signal-conditioning/isolation semiconductor.
Key features include ±70-V DC bus fault protection (the highest in TI's automotive isolated CAN family), ±30-V common-mode voltage range for robust operation in 12 V and 24 V automotive/industrial buses, 5 Mbps CAN FD flexible data rate support, 1.7 V to 5.5 V logic-side supply with 4.5 V to 5.5 V bus-side supply, and 250 kV/µs typical common-mode transient immunity (CMTI). The half-duplex DWV variant consumes only one logic-side channel and supports a wide -40°C to +125°C operating range qualified to AEC-Q100 Grade 1 for automotive use.
The device uses TI's proprietary silicon-dioxide (SiO2) capacitive isolation barrier coupled with an integrated differential CAN PHY. The internal architecture separates the digital interface (TXD, RXD, controller-side supply) from the bus-side driver/receiver with a reinforced isolation barrier rated for 400-VRMS or 2.5 kVRMS working voltages. This eliminates the need for external isolators, optocouplers, or discrete isolated DC-DC converters, reducing PCB area by up to 50% versus optocoupler-based discrete implementations.
Typical applications include automotive body and chassis ECUs (BCM, gateway modules), electric vehicle battery management system (BMS) communication, industrial CANopen networks, solar inverter communication buses, PLC distributed I/O, and any 12 V / 24 V system that requires robust CAN communication with reinforced isolation. Designers select the ISO1042QDWVRQ1 when regulatory isolation certification, automotive-grade qualification, and high bus fault tolerance are simultaneously required.
Design tip: the bus-side VCC2 pin must be supplied from a 4.5 V to 5.5 V rail; a low-ESR 1 µF to 10 µF ceramic decoupling capacitor placed within 2 mm of VCC2 is required. The logic-side VCC1 can run from 1.7 V to 5.5 V, allowing direct connection to 1.8 V, 3.3 V, or 5 V MCUs without level translation.
This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ISO1042QDWVRQ1 — 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 ISO1042QDWVRQ1 (same form factor and footprint) — differing in Package, Protocol.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISO1042BDWVR
✅ Drop-In✓ In Stock
$1.58 / Unit
View Datasheet →ISO1042BQDWVQ1
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1044BDWVR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1042DWR
✅ Drop-In📋 Reference alternative (not in catalog)
MAX33014EATA+
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1042QDWVRQ1 Specifications
| Product Type | Isolated CAN Transceiver |
| Protocol | CAN, CAN FD per ISO 11898-2 (2016) |
| Number of Channels | 1/1 (half duplex) |
| Data Rate (max) | 5 Mbps (CAN FD flexible data rate) |
| Isolation Voltage | 2.5 kV RMS (per VDE 0884-11) |
| Bus Fault Protection (DC) | ±70 V |
| Common-Mode Voltage Range | ±30 V |
| Common-Mode Transient Immunity (CMTI) | 250 kV/us typical |
| Logic-Side Supply (VCC1) | 1.7 V to 5.5 V |
| Bus-Side Supply (VCC2) | 4.5 V to 5.5 V |
| Operating Temperature Range | -40 C to +125 C |
| Package | SOIC-8 (DWV) 5.85 x 6.5 mm wide-body, 8 pins |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 Grade 1 |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
ISO1042QDWVRQ1 Pin Configuration
| Pin 1 | VCC2 — Bus-side power supply, 4.5 V to 5.5 V |
| Pin 2 | CANH — CAN bus high line |
| Pin 3 | CANL — CAN bus low line |
| Pin 4 | GND2 — Bus-side ground |
| Pin 5 | GND1 — Logic-side ground |
| Pin 6 | RXD — Logic-side receive data output, CMOS push-pull |
| Pin 7 | TXD — Logic-side transmit data input, CMOS |
| Pin 8 | VCC1 — Logic-side power supply, 1.7 V to 5.5 V |
Typical Applications
ISO1042QDWVRQ1 is suitable for 6 applications: Automotive CAN Bus Gateway, Electric Vehicle Battery Management Communication, Industrial CANopen Network Nodes, Solar Inverter Communication Bus, PLC Distributed I/O Backplane, Isolated 12 V / 24 V Sensor Networking.
Automotive CAN Bus Gateway
The ISO1042QDWVRQ1 is ideal for automotive body and chassis CAN bus gateway modules. Its 5 Mbps CAN FD support allows high-payload gateway bridging between CAN FD domains and classic CAN sub-networks, while 2.5 kV RMS isolation protects low-voltage MCUs from hazardous 12 V / 24 V bus faults. AEC-Q100 Grade 1 qualification ensures reliability under hood environments from -40 °C to +125 °C. Designers benefit from ±70 V DC bus fault tolerance that survives accidental shorts to battery or load-dump transients. Compared to optocoupler + discrete CAN PHY designs, this single IC saves PCB area and design effort.
Recommended
Electric Vehicle Battery Management Communication
In EV battery management systems (BMS), the ISO1042QDWVRQ1 isolates the BMS master from individual cell monitoring CAN buses, preventing ground-loop-induced errors that can corrupt cell voltage readings. The ±30 V common-mode range handles the large dV/dt transients present in 400 V and 800 V traction systems, while the 250 kV/us CMTI keeps the data link intact through fast switching events. With VCC1 at 3.3 V and VCC2 at 5 V, it bridges typical BMS MCU and CAN bus voltages directly. The Q1 automotive qualification simplifies functional safety documentation under ISO 26262 workflows.
Recommended
Industrial CANopen Network Nodes
For industrial CANopen fieldbus nodes, the ISO1042QDWVRQ1 provides reinforced isolation required by IEC 61800-5-1 motor-drive and IEC 61131-2 PLC standards. Up to 5 Mbps CAN FD supports modern high-speed CANopen profiles, while ±70 V bus fault tolerance protects against DC-link miswiring in motor cabinets. The wide 1.7 V to 5.5 V logic-side supply accepts modern 1.8 V and 3.3 V industrial MCUs directly. Drop-in footprint compatibility with the industrial-grade ISO1042BDWVR allows single BOM with optional Q1 upgrade for harsh-environment variants.
Recommended
Solar Inverter Communication Bus
Photovoltaic string inverters and central PV power stations rely on isolated CAN for inter-module communication between power optimizers and the gateway inverter. The ISO1042QDWVRQ1's 2.5 kV RMS isolation bridges the 600 V to 1500 V DC string potential to the low-voltage communication domain, while ±70 V fault tolerance prevents damage from miswired DC strings. Operating temperature to +125 °C suits outdoor inverter enclosures under full sun load. Compared to discrete optocoupler + transceiver designs, this single IC halves BOM cost.
Recommended
PLC Distributed I/O Backplane
In PLC distributed I/O backplanes, the ISO1042QDWVRQ1 isolates rack-internal CANbus between field wiring and the central CPU, shielding the controller from field-side overvoltages and ESD events. The -40 °C to +125 °C range supports unheated cabinets in cold climates. With up to 5 Mbps CAN FD, it carries modern high-payload function block data without protocol overhead. The 8-pin wide-body SOIC keeps PCB density low in DIN-rail I/O modules.
Recommended
Isolated 12 V / 24 V Sensor Networking
Industrial CAN sensor networks (fluid-level sensors, hydraulic pressure transmitters, motor-mounted rotary encoders with CANopen) commonly operate from 24 V supplies with large chassis-to-sensor potential differences. The ISO1042QDWVRQ1 rejects those ground potential differences up to ±30 V common-mode while delivering 5 Mbps link integrity. The wide VCC1 range lets the sensor MCU run from 1.8 V or 3.3 V without a separate level shifter. AEC-Q100 qualification allows the same sensor BOM to be reused in on-vehicle skid and hydraulic systems.
Recommended
Recommended Products Summary
Engineering reference data for ISO1042QDWVRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO1042BDWVR | ISO1042BQDWVQ1 | ISO1044BDWVR | ISO1042DWR | MAX33014EATA+ |
|---|---|---|---|---|---|---|
| Package | SOIC-8 (DWV) | SOIC-8 (DWV) - same | SOIC-8 (DWV) - same | SOIC-8 (DW) - same width differs | SOIC-16 (DW) | SOIC-8 - similar |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Maximum Data Rate | 5 Mbps (CAN FD) | 5 Mbps (CAN FD) | 5 Mbps (CAN FD) | 5 Mbps (CAN FD) | 5 Mbps (CAN FD) | 5 Mbps (CAN FD) |
Key Differentiators
- Highest DC bus fault tolerance in TI's ISO1042 family (vs ISO1050)
- Includes AEC-Q100 Grade 1 automotive qualification by default (vs ISO1042BDWVR)
- Wide VCC1 from 1.7 V to 5.5 V supports 1.8 V MCUs without a level shifter (vs MAX33014EATA+)
Design Notes
VCC2 (bus-side supply) requires 4.5 V to 5.5 V at typically 50 to 75 mA continuous, plus load-step capacitance. Place a 1 µF to 10 µF low-ESR ceramic capacitor within 2 mm of the VCC2 pin; pairing with a 100 nF X7R high-frequency bypass cap improves CMTI performance. VCC1 can be supplied directly from the MCU rail at 1.8 V, 2.5 V, 3.3 V, or 5 V without a separate LDO. Estimated: at 5 V VCC2 and 75 mA the typical dissipation is 0.375 W in steady state.
Maintain at least 6 mm of clearance under and around the SOIC-8 (DWV) wide-body package to preserve 2.5 kV RMS isolation creepage. Do not run any logic-side trace beneath the isolation barrier on the same plane layer; route VCC2 and CANH/CANL traces in compact differential pairs with 100 Ω differential impedance. Use ground chokes or ferrite beads between GND1 and GND2 if the application chassis-ground is shared with bus ground.
Do NOT use the ISO1050 as a drop-in replacement on an existing ISO1042 PCB: per TI E2E forum 1001458, pin 2/3 (RXD/TXD) are swapped between these two families, requiring board rework. Confirm exact DWV vs DW package suffix - DWV is wide-body 8-SOIC while DW is wider 16-SOIC; both look similar in 3D view. Always check TXD/RXD direction: TXD is an INPUT to the ISO1042QDWVRQ1, NOT an output.
Estimated: at 5 V VCC2 and 75 mA quiescent plus full-load bus traffic, dissipation is around 0.375 W and junction rise is modest. The SOIC-8 (DWV) wide-body package has a θJA of roughly 65 °C/W on a standard 1-oz 4-layer JEDEC board; a 60 °C temperature rise is realistic at 1 W. For tight thermal enclosures, add thermal vias under the exposed pad footprint area if any is defined in the datasheet.
Compliance Information
AEC-Q100 Grade 1 automotive qualified per TI product page. RoHS and REACH compliant. Lead-free and halogen-free per TI environmentally-conscious packaging claims. Isolation certification per VDE 0884-11.
