ISO1044BD - 5 Mbps Galvanically Isolated CAN FD | Texas Instruments
N.º de pieza: ISO1044BD ✓ ActivoISO1044BD Descripción general
An isolated CAN transceiver is an interface circuit that transfers CAN signals across a galvanic isolation barrier while protecting the connected controller from voltage differences, ground faults, and bus transients. The ISO1044BD is a half-bus CAN transceiver within the broader hierarchy of CAN interface ICs, interface ICs, and industrial communication semiconductors. Its isolation barrier helps prevent ground-loop current and improves fault containment in industrial equipment.
The device meets ISO11898-2 (2016) and supports CAN FD operation up to 5 Mbps. The ISO1044B family provides ±58 V DC bus-fault protection and tolerates ±12 V common-mode voltage. The manufacturer describes the isolation rating as 5000 Vrms reinforced, while the SOIC-8 package reduces board area compared with a discrete optocoupler-based isolation implementation.
The ISO1044BD integrates the CAN physical-layer transceiver and isolation barrier into one package. The digital CAN TX and RX interfaces remain electrically separated from the CAN bus side, allowing the transceiver to operate with the local logic supply and ground referenced to the controller. CAN FD increases payload capacity compared with classic CAN while retaining compatibility with established CAN network architecture.
Typical uses include industrial automation controllers, electric motor drives, robotics, building automation, CAN-based sensors, and isolated service interfaces. It is particularly suitable when ground potentials can vary between equipment cabinets or when a bus fault could otherwise transfer damaging energy into the control system.
Designers should use the manufacturer-specified CAN bus protection network, isolation capacitors, and PCB creepage and clearance rules. The SOIC-8 package still requires careful isolation-barrier routing; copper, solder mask, and component placement must not bridge the isolated and non-isolated domains.
This product page consolidates verified manufacturer capabilities, distributor availability, comparison parameters, and practical isolation-layout guidance, adding engineering context beyond the basic manufacturer product summary while clearly identifying specifications that still require confirmation from the full datasheet.
Alternativas directas para ISO1044BD — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
No hay alternativas directas disponibles para este producto.
Solicitar alternativasISO1044BD Especificaciones
| Product Type | Galvanically isolated CAN FD transceiver |
| CAN Bus Configuration | 1/1 isolated half-bus transceiver |
| Maximum Data Rate | 5 Mbps |
| CAN Standard | ISO11898-2 (2016) |
| DC Bus Fault Protection | -58 V to +58 V |
| Common-Mode Voltage Range | -12 V to +12 V |
| Isolation Voltage | 5000 Vrms reinforced |
| Encapsulado | 8-pin SOIC (D) |
| Recuento de pines | 8 pins |
| Tipo de montaje | Surface mount |
| Isolation Technology | Galvanic isolation |
| Estado RoHS | RoHS3 compliant |
Guía de configuración de pines de ISO1044BD 8-pin soic (d)
Configuración de pines para ISO1044BD (encapsulado 8-pin soic (d)). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para ISO1044BD.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ISO1044BD es adecuado para 6 aplicacións: Industrial Automation Controllers, Electric Motor Drives, Robotics and Machine Control, Building Automation and HVAC Networks, Distributed CAN-Based Sensors, CAN Gateway and Communication Equipment.
Industrial Automation Controllers
The ISO1044BD fits isolated industrial automation nodes that communicate over CAN FD up to 5 Mbps while separating controller ground from the field bus. Its ±58 V DC bus-fault protection and ±12 V common-mode range improve resilience when industrial equipment has long cables or differing ground potentials. The 5000 Vrms reinforced isolation barrier can reduce ground-loop current and confine bus faults away from sensitive control electronics. Designers place the transceiver at the bus interface, use the manufacturer-recommended protection network, and keep the logic-side and bus-side copper domains physically separate. The primary design trade-off is ensuring that the isolation capacitance, timing, and creepage requirements are satisfied without compromising the compact 8-pin SOIC-8 footprint.
Recomendado
Electric Motor Drives
The ISO1044BD is suitable for electric motor drives where a controller, power converter, and CAN network may operate at different ground potentials. Its galvanic isolation provides a reinforced 5000 Vrms barrier, while ±58 V DC fault protection and ±12 V common-mode tolerance help the interface withstand bus-side disturbances. The transceiver supports CAN FD data rates up to 5 Mbps, allowing control commands and diagnostic data to share the network with higher payload capability than classic CAN. In implementation, the isolated transceiver should sit near the bus connector, with surge and transient protection placed on the CAN side. Engineers must verify loop delay, bus termination, and timing margins against the complete motor-drive system.
Recomendado
Robotics and Machine Control
ISO1044BD supports CAN FD robot controllers and machine-control modules that need reliable communication across an isolation barrier. Its 5 Mbps maximum rate is useful for command, position, and diagnostic traffic, while the isolated architecture prevents bus-side faults and ground differences from propagating directly into the controller. The reinforced isolation and 5000 Vrms rating are particularly relevant in systems containing motor drives, contactors, and long wiring harnesses. The 8-pin SOIC-8 package helps preserve board area compared with a discrete optocoupler isolation approach. Layout remains critical: keep the bus and logic grounds separated, use the prescribed isolation capacitors, and route CAN traces away from sensitive analog or high-switching-current paths.
Recomendado
Building Automation and HVAC Networks
The ISO1044BD can serve as the isolated CAN FD boundary in building automation controllers, HVAC equipment, and distributed room modules. Building systems often connect equipment installed on different floors or electrical services, making ground-loop prevention important for reliable communications. The ISO1044BD provides ±58 V DC bus-fault protection and a ±12 V common-mode range, while CAN FD operation up to 5 Mbps supports richer sensor and diagnostic payloads. Its 5000 Vrms reinforced isolation reduces coupling between the building network and low-voltage control electronics. The implementation must preserve the isolation-barrier geometry, provide proper CAN termination, and use qualified surge protection where building wiring enters the enclosure.
Recomendado
Distributed CAN-Based Sensors
ISO1044BD is appropriate for distributed sensors that must communicate through a protected CAN interface without exposing the measurement electronics to bus transients. The isolated half-bus architecture supports data rates up to 5 Mbps, and the ±58 V DC fault protection provides an additional line with harsh industrial wiring. Its ±12 V common-mode capability helps maintain operation when the bus is shifted relative to local ground. Designers can place the ISO1044BD beside a connector and place protection components only on the bus side of the isolation boundary. Sensor-node implementations should also verify the supported supply range, propagation delay, and operating temperature from the full manufacturer datasheet because those values were not included in the verified search excerpts.
Recomendado
CAN Gateway and Communication Equipment
The ISO1044BD fits communication gateways that bridge an isolated CAN FD network to another embedded interface. By transferring CAN signals across a reinforced isolation barrier, it helps prevent ground currents and fault energy from reaching gateway electronics. The 5 Mbps CAN FD rate supports high-volume diagnostics and payload traffic, while the compact SOIC-8 package allows the isolation function to fit into a small gateway design. A practical implementation places the ISO1044BD on the protected bus side of the board and routes the logic-side ground only within its permitted region. Timing between the host processor and CAN controller must be checked because isolation and transceiver propagation contribute to the end-to-end loop delay. Manufacturer-specified isolation capacitance and bus protection are also required.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ISO1044BD — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto |
|---|---|
| Package | 8-pin SOIC (D) |
| Brand | Texas Instruments |
| Product Type | Galvanically isolated CAN FD transceiver |
| Maximum Data Rate | 5 Mbps |
| CAN Standard | ISO11898-2 (2016) |
| DC Bus Fault Protection | -58 V to +58 V |
| Common-Mode Voltage Range | -12 V to +12 V |
| Isolation Voltage | 5000 Vrms reinforced |
| CAN Bus Configuration | 1/1 isolated half-bus transceiver |
| RoHS Status | RoHS3 compliant |
Diferenciadores clave
- Integrated reinforced galvanic isolation (frente a TCAN332DR)
- Higher stated CAN FD data capability than a non-isolated site-list comparator (frente a TCAN337DR)
- Strong bus-fault and common-mode protection (frente a ISO1042BDWR)
Notas de diseño
Maintain a continuous isolation barrier between the bus-side and logic-side copper, including ground, fill copper, vias, silkscreen-dependent assembly features, and placed components. Do not route signals or return currents beneath the device in a way that bridges the barrier. Use the Texas Instruments ISO1044 datasheet for the required isolation-capacitor placement, creepage, clearance, and PCB finish guidance, and verify the final dimensions against the applicable working voltage and pollution-degree requirements.
Do not assume that ±58 V DC bus-fault protection eliminates the need for external surge and ESD protection. The CAN connector and wiring can present transients beyond the transceiver’s operating limits, so use a protection network appropriate for the installation while respecting the manufacturer’s topology and component-rating guidance. Also keep bus-side protection components on the CAN side of the isolation barrier and confirm termination placement to avoid incorrect stub behavior or loss of signal margin.
CAN FD operation up to 5 Mbps requires careful routing from the controller-side TX and RX connections through the transceiver to the CANH and CANL bus pins. Keep the bus pair short, matched by geometry where practical, and separated from switching-power and high-current return paths. Confirm the complete propagation delay against the CAN FD timing budget, use the recommended bus protection network, and avoid adding long unprotected stubs because they can create reflections and reduce communication margin.
The verified excerpts do not provide the ISO1044BD supply-voltage range, supply current, or decoupling requirements, so those values must not be inferred from generic CAN transceivers. Before schematic capture, check the official manufacturer datasheet for both isolated-side supply arrangements, bypass-capacitor values, startup behavior, and power-consumption limits. Verify that the selected regulator can support the transceiver without introducing noise or droop on the logic-side rail.
Información de cumplimiento
The verified DiGi Electronics listing identifies ISO1044BD as RoHS3 compliant. No verified information was provided for REACH, AEC-Q100 qualification, lead-free status, halogen-free status, or conflict-minerals compliance.