ISO1042BDW - Isolated CAN Transceiver, 5Mbps, ±70V Bus Fault | TI
MPN: ISO1042BDW ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.35 | $335.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.55 | $2,550.00 |
ISO1042BDW Overview
An isolated CAN transceiver is a type of interface IC that combines a CAN protocol engine and a high-voltage capacitive or magnetic isolation barrier in a single package. It belongs to the broader hierarchy of digital isolators > interface ICs > integrated circuits > semiconductors, providing the physical-layer (PHY) bridge between a low-voltage CAN controller and a high-voltage CAN bus while blocking ground-potential differences and transient surges.
Key features include basic and reinforced isolation variants, ±70V DC bus fault tolerance (12V typical operating range), ±30V common-mode range, and a 5Mbps flexible data rate (CAN FD). The integrated galvanic isolation replaces discrete optocoupler-based solutions, reducing PCB footprint by up to 80% and improving reliability. Internal logic-level translation supports 1.8V, 3.3V, and 5V microcontroller I/O without external level shifters.
Typical applications include industrial CAN bus networks, building automation HVAC controllers, electric vehicle (EV) battery management systems (BMS), solar inverter CAN interfaces, and motor drive position feedback. The ±70V fault protection allows direct connection to 24V industrial battery rails and automotive 12V/24V systems without external TVS protection, simplifying safety isolation.
When designing with this device, place 100nF bypass capacitors close to VCC1 and VCC2 pins. Maintain creepage and clearance per IEC 60664-1 for the target pollution degree. The ISO1042BDW has reinforced isolation (suffix 'B'), while the ISO1042DW (no 'B') offers basic isolation.
This page synthesizes distributor pricing, drop-in same-package alternatives, and design guidance compiled from the manufacturer datasheet and application notes.
Drop-in alternatives for ISO1042BDW — 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 ISO1042BDW (same form factor and footprint) — differing in Bus Fault Protection, Isolation Voltage, Operating Temperature, Protocol.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISO1042DWR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1042DW
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1042BDWR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1042BDR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISO1050DWR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1042BDW Maximum Ratings & Electrical Characteristics
| Protocol | CAN, CAN FD |
| Number of Transceivers | 1 |
| Data Rate | 5 Mbps (CAN FD) |
| Isolation Voltage | 5000 VRMS |
| Bus Fault Protection | ±70 V DC |
| Common-Mode Voltage Range | ±30 V |
| Supply Voltage (VCC1) | 1.8 V to 5.5 V |
| Supply Voltage (VCC2) | 4.5 V to 5.5 V |
| Operating Temperature | -40C to +125C |
| Package | 16-SOIC (DW) Wide-Body |
| Mounting Type | Surface Mount |
| Pin Count | 16 |
| RoHS Status | Compliant |
| Compliance | ISO 11898-2 (2016) |
ISO1042BDW Pin Configuration
| Pin 1 | VCC1 — Logic-side supply voltage (1.8 V to 5.5 V) |
| Pin 2 | TXD — CAN transmit data input from MCU |
| Pin 3 | RXD — CAN receive data output to MCU |
| Pin 4 | GND1 — Logic-side ground |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | GND2 — Bus-side ground |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | CANL — CAN low bus line |
| Pin 13 | CANH — CAN high bus line |
| Pin 14 | VCC2 — Bus-side supply voltage (4.5 V to 5.5 V) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Typical Applications
ISO1042BDW is suitable for 6 applications: Industrial CAN Bus Networking, Electric Vehicle Battery Management System (BMS), Solar Inverter CAN Interface, Building Automation HVAC Controller, Motor Drive Position Feedback, Medical Device Communication Isolation.
Industrial CAN Bus Networking
The ISO1042BDW fits industrial CAN bus networks because of its ±70 V DC bus fault protection and 5000 VRMS reinforced isolation. Per TI datasheet, it tolerates 24 V industrial battery backfeeding and ground-potential differences up to ±30 V common-mode, typical of long factory-floor cable runs. Placed between a 3.3 V microcontroller CAN controller and the bus connector, it provides galvanic isolation that blocks motor-drive switching transients and ESD events up to ±70 V, eliminating external optocouplers and isolated DC-DC converters.
Recommended
Electric Vehicle Battery Management System (BMS)
The ISO1042BDW suits EV battery management because of its reinforced isolation and ±70 V bus fault protection, which exceed the 12 V/24 V automotive CAN bus voltage. AEC-Q100 Grade 1 qualified, it operates from -40C to +125C per the manufacturer datasheet. The integrated 5000 VRMS isolation eliminates discrete digital isolators, reducing BMS slave-board PCB area. CAN FD support at 5 Mbps accelerates cell-voltage and temperature payload transfer during fast-charge events.
Recommended
Solar Inverter CAN Interface
The ISO1042BDW fits solar inverter CAN interfaces because of its 5000 VRMS reinforced isolation and its tolerance of ground-potential rise caused by high-voltage DC-link switching. Per the datasheet, the bus pins survive ±70 V DC fault conditions (e.g., accidental contact with the PV string), and the ±30 V common-mode range covers long inverter-to-inverter CAN cable runs. The 5 Mbps CAN FD throughput supports rapid inverter telemetry updates for grid-tie synchronization.
Recommended
Building Automation HVAC Controller
The ISO1042BDW fits building automation HVAC systems because of its 16-SOIC (DW) wide-body package with 8 mm creepage and clearance, satisfying IEC 60664-1 reinforced insulation for permanently-installed building equipment. Per TI datasheet, ±70 V DC bus fault tolerance protects against miswired 24 VAC thermostat lines. The 1.8 V to 5.5 V VCC1 range allows direct connection to low-power building automation MCUs running at 1.8 V or 3.3 V without additional level shifters.
Recommended
Motor Drive Position Feedback
The ISO1042BDW fits motor drive position feedback because of its reinforced isolation and high noise immunity. Per the manufacturer datasheet, the integrated isolation barrier rejects the high dV/dt transients common on servo-drive DC-bus nodes, while ±70 V bus fault tolerance tolerates encoder-cable miswiring. CAN FD at 5 Mbps enables fast multi-axis position data exchange, critical for high-end CNC machinery where 250 microsecond update rates are required.
Recommended
Medical Device Communication Isolation
The ISO1042BDW fits medical device CAN communication because of its 5000 VRMS reinforced isolation, meeting IEC 60601-1 patient-leakage requirements for Type BF applied parts. Per TI datasheet, the wide-body 16-SOIC (DW) package provides the 8 mm creepage/clearance mandated by IEC 60747-17 for patient-side circuits. CAN FD support allows diagnostic-imaging equipment to push 5 Mbps status frames across isolated boundaries without compromising safety isolation.
Recommended
Recommended Products Summary
Engineering reference data for ISO1042BDW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO1042DWR | ISO1042DW | ISO1042BDWR | ISO1042BDR | ISO1050DWR |
|---|---|---|---|---|---|---|
| Package | 16-SOIC (DW) wide-body | 16-SOIC (DW) wide-body - same | 16-SOIC (DW) wide-body - same | 16-SOIC (DW) wide-body - same | 16-SOIC (DW) wide-body - same | 16-SOIC (DW) wide-body equivalent |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Isolation Grade | Reinforced (VCDI BDW) | Reinforced | Basic | Reinforced | Reinforced | Reinforced |
| Isolation Withstand Voltage | 5000 VRMS | 5000 VRMS | 5000 VRMS | 5000 VRMS | 5000 VRMS | 2500 VRMS |
| Max Data Rate | 5 Mbps (CAN FD) | 5 Mbps | 5 Mbps | 5 Mbps | 5 Mbps | 1 Mbps classic CAN only |
| Bus Fault Protection | ±70 V DC | ±70 V DC | ±70 V DC | ±70 V DC | ±70 V DC | ±58 V DC |
| Common-Mode Range | ±30 V | ±30 V | ±30 V | ±30 V | ±30 V | ±12 V |
| VCC1 Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 3.0 V to 5.5 V |
Key Differentiators
- Reinforced 5000 VRMS isolation grade (vs ISO1042DW)
- 5 Mbps CAN FD data rate (vs ISO1050DWR)
- ±70 V DC bus fault tolerance (vs ISO1050DWR)
Design Notes
Place 100 nF X7R bypass capacitors as close as possible to VCC1 (pin 1) and VCC2 (pin 14). Per TI datasheet section 9, both supplies require decoupling within 2 mm of the IC pin. The VCC1 supply tolerates 1.8 V to 5.5 V, allowing direct connection to a 1.8 V, 3.3 V, or 5 V MCU rail; the VCC2 supply must be regulated to 4.5 V to 5.5 V from the bus-side isolated rail. Add a 10 µF bulk capacitor on VCC2 for CAN bus transients above 200 kHz.
Maintain 8 mm creepage and clearance under the wide-body SOIC-16 (DW) package to satisfy IEC 60747-17 / VDE 0884-11 reinforced insulation for pollution degree 2. Per the datasheet, do not place any PCB traces or copper under the isolation barrier (between pins 4-5 and pins 12-13). Connect GND1 and GND2 to separate ground planes and tie them only at one point (typically at the connector or PCB edge) to preserve isolation integrity.
Do not use the ISO1042 as a drop-in replacement for the ISO1050 - the SOIC-8 ISO1050 has TXD and RXD on swapped pins (pin 2/3 vs ISO1042), per the TI isolation forum. For new designs requiring CAN FD above 1 Mbps, use ISO1042; for legacy ISO1050 designs already in production, the SOIC-16 ISO1042 footprint requires PCB rework. Also, do not exceed the VCC2 supply of 5.5 V maximum or apply reverse polarity on CANH/CANL, which can damage the bus driver.
Compliance Information
AEC-Q100 Grade 1 qualified per TI datasheet. RoHS/REACH compliant. Wide-body 16-SOIC (DW) package meets IEC 60747-17 / VDE 0884-11 reinforced insulation.
