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Texas Instruments ISO1044BDR
- Part No.:
- ISO1044BDR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO1044BDR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,229
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Product details
Overview
ISO1044BDR from Texas Instruments is a galvanically isolated CAN FD transceiver meeting ISO 11898-2:2016, supporting up to 5 Mbps data rate, ±58-V DC bus fault protection, and 85 kV/µs CMTI. It features dual-supply operation (VCC1: 1.71–5.5 V; VCC2: 4.5–5.5 V), operates from –40°C to +125°C, and is used in industrial PLCs, solar inverters, and AC drives requiring robust noise immunity and reinforced insulation.
For engineers reviewing the ISO1044BDR datasheet, ISO1044BDR pinout, ISO1044BDR application, or ISO1044BDR equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, safety-certified isolation specs, and validated alternative transceivers - all grounded in TI's production-grade SLLSFB0A datasheet and official package documentation.
Technical Context
The ISO1044BDR integrates a silicon dioxide (SiO₂) isolation barrier rated for 3000 VRMS withstand and 450 VRMS working voltage, enabling reinforced insulation per DIN VDE V 0884-11:2017-01 and UL 1577. Its dual-side architecture separates digital logic (Side 1) and bus transceiver (Side 2), with independent undervoltage lockout on both VCC1 and VCC2.
It implements driver dominant time-out (1.2–3.8 ms), thermal shutdown at 190°C, and supports classic CAN (≤1 Mbps) and CAN FD (≤5 Mbps) with bit timing symmetry <±65 ns. Common-mode range is ±12 V, and passive high-impedance bus terminals prevent loading when unpowered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 5 Mbps in CAN FD mode - enables 5× faster payload transfer vs. classic CAN 1 Mbps, critical for high-throughput industrial control loops. |
| Isolation Withstand Voltage | 3000 VRMS (1 s) - meets UL 1577 and supports reinforced insulation in safety-critical systems like elevators and battery management. |
| Bus Fault Protection | ±58 V DC on CANH/CANL - protects against sustained ground faults and supply coupling in motor drive and power supply applications. |
| CMTI | ≥85 kV/µs - ensures reliable communication in noisy environments with fast-switching IGBTs or SiC MOSFETs (e.g., solar inverters). |
| Supply Range | VCC1: 1.71–5.5 V (supports 1.8/2.5/3.3/5.0 V logic); VCC2: 4.5–5.5 V - enables flexible MCU interfacing and stable bus-side biasing. |
| Operating Temperature | –40°C to +125°C ambient - qualified for under-hood automotive-adjacent industrial use, including servo drives and PLC modules. |
| ESD Robustness | ±8 kV IEC 61000-4-2 (bus pins), ±10 kV HBM - reduces system-level ESD design overhead in factory automation equipment. |
Pinout & Package
ISO1044BDR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, optimized for space-constrained industrial PCBs and offering creepage/clearance >4 mm between isolation sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC1 | Digital-side supply | Provides power to logic interface (TXD/RXD); supports 1.71–5.5 V for direct connection to 1.8-V or 5-V MCUs without level shifters. |
| 2 - TXD | Transmit data input | CMOS-compatible input (VIH = 0.7×VCC1); asserts dominant state (LOW) to drive CAN bus - enables direct MCU GPIO connection. |
| 3 - RXD | Receive data output | CMOS output (VOH/VOL specified per VCC1); provides isolated CAN bus status to MCU - eliminates ground-loop noise coupling into controller side. |
| 4 - GND1 | Digital-side ground | Reference for VCC1 and TXD/RXD signals; must be separated from bus-side ground (GND2) to maintain galvanic isolation integrity. |
| 5 - CANL | Low-side bus terminal | Isolated differential bus line; paired with CANH to form ±12 V common-mode tolerant interface - connects directly to standard CAN bus wiring. |
| 6 - CANH | High-side bus terminal | Isolated differential bus line; forms 1.5–3.3 V dominant differential swing with CANL - compliant with ISO 11898-2 physical layer requirements. |
| 7 - GND2 | Bus-side ground | Reference for VCC2 and CANH/CANL; electrically isolated from GND1 - prevents noise currents from motor drives or inverters entering the controller domain. |
| 8 - VCC2 | Bus-side supply | Supplies transceiver core (4.5–5.5 V); powers driver/receiver circuitry independently - ensures stable bus signaling even if digital side experiences brownout. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Barrier | SiO₂-based insulation with 3000 VRMS withstand and 450 VRMS working voltage - certified to VDE 0884-11 and UL 1577 for functional safety compliance in industrial systems. |
| Dominant Time-Out (DTO) | Programmable 1.2–3.8 ms timeout prevents bus lock-up due to MCU hang or software fault - eliminates need for external watchdog supervision in PLC modules. |
| Glitch-Free Power-Up | Ensures CAN bus remains recessive during VCC1 or VCC2 ramp-up - prevents spurious frame transmission during system boot in solar inverter gate drivers. |
| Thermal Shutdown | Activates at 190°C with 8°C hysteresis - protects isolation barrier from thermal overstress during overload or poor heatsinking in enclosed AC drive enclosures. |
| Passive Bus Terminals | High-impedance CANH/CANL when unpowered - allows safe hot-plug of CAN nodes without disturbing live bus traffic in distributed DCS networks. |
Applications
| PLC Communication Module | Solar Inverter Control |
|---|---|
|
Use Scenario: Isolated CAN FD link between main controller and remote I/O expansion units in modular PLC racks exposed to 48-V DC field power and EMI from contactors. IC Role / Device Role / Timing Role: Galvanic isolator and physical layer transceiver; handles 2 Mbps FD frames with <±45 ns receiver timing symmetry for deterministic cycle times. Use Value: Eliminates ground loops across rack segments while maintaining 5 Mbps burst capability for firmware updates - reducing integration effort versus optocoupler-based solutions. |
Use Scenario: Bidirectional CAN FD communication between MPPT controller and string-level optimizers in rooftop solar arrays subject to lightning-induced surges and wide temperature swings. IC Role / Device Role / Timing Role: Isolated bus interface with ±58-V fault tolerance and 85 kV/µs CMTI - ensures uptime during grid switching transients and PV string arcing events. Use Value: Enables single-chip isolation without external TVS or filtering components - shrinking BOM cost and board area by >30% vs. discrete isolator + transceiver designs. |
| AC Servo Drive Interface | Battery Management System (BMS) |
|
Use Scenario: Real-time position feedback and command exchange between motion controller and servo amplifier in factory automation cells with high di/dt noise from PWM-driven motors. IC Role / Device Role / Timing Role: Noise-immune CAN FD transceiver with ±12 V common-mode range and glitch-free power-up - maintains synchronization during frequent drive enable/disable cycles. Use Value: Prevents communication dropouts during motor startup surges - improving positioning accuracy and eliminating costly re-homing procedures. |
Use Scenario: Inter-module CAN communication among cell monitoring units in high-voltage EV battery packs operating from –40°C to +85°C ambient with strict isolation requirements per ISO 6469. IC Role / Device Role / Timing Role: Reinforced-isolation transceiver with –40°C to +125°C rating and 3000 VRMS withstand - satisfies functional safety requirements for HV battery domain separation. Use Value: Reduces certification burden by integrating VDE/UL-certified isolation into the CAN PHY - accelerating ASIL-B compliance for battery pack electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated CAN transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM3053BRWZ | Integrated isolated DC-DC converter (5 V out); 1 Mbps max data rate; 2500 VRMS isolation; SOIC-20 package | Preferred where board space permits larger footprint and self-powered isolation is needed - e.g., legacy industrial sensors without auxiliary bus-side supply | Select ADM3053BRWZ only if isolated power generation is required; ISO1044BDR requires external isolated supply but offers 5 Mbps FD and smaller SOIC-8 footprint. |
| SI82520AD-IS | Capacitive isolation; 1 Mbps CAN; no integrated CAN PHY - requires external CAN driver (e.g., TJA1042); 5000 VRMS isolation; SOIC-8 | Suitable for custom PHY tuning or mixed-protocol designs (e.g., CAN + LIN on same isolator); lacks built-in DTO and bus fault protection | Choose SI82520AD-IS only when designing non-standard CAN variants or needing ultra-high isolation voltage; ISO1044BDR delivers full CAN FD compliance out-of-box. |
Compared with ADM3053BRWZ and SI82520AD-IS, ISO1044BDR uniquely combines 5 Mbps CAN FD support, ±58-V bus fault protection, and SOIC-8 packaging - making it optimal for space-constrained, high-speed industrial nodes where external isolated power is already available.
Availability
ISO1044BDR is available at Aetrix Electronics and suitable for AC servo drives, solar inverters, and PLC communication modules requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing for safety-critical deployments.
Supply support for ISO1044BDR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability ICs for industrial, automotive, and communications markets.
The ISO1044BDR belongs to TI's isolated interface product line, engineered specifically for noise-immune industrial networking - delivering integrated safety-certified isolation, CAN FD timing precision, and extended temperature operation in compact packages.
FAQ
What is the maximum CAN FD data rate supported by the ISO1044BDR?
The ISO1044BDR supports up to 5 Mbps in CAN FD mode, as confirmed in TI's SLLSFB0A datasheet Section 1 (Features) and Section 6.10 (Switching Characteristics). This enables significantly faster payload transfer than classic CAN (1 Mbps), with measured bit timing symmetry of ≤±65 ns at 5 Mbps - essential for high-throughput control in servo drives and energy storage systems using ISO1044BDR.
Does the ISO1044BDR include integrated isolated power?
No, the ISO1044BDR does not integrate an isolated DC-DC converter. It requires two separate supplies: VCC1 (1.71–5.5 V) for the digital side and VCC2 (4.5–5.5 V) for the bus side. External isolated power - such as a transformer-based module or capacitive isolator with LDO - must be provided. This architecture allows design flexibility and avoids efficiency trade-offs inherent in integrated solutions, as documented in the ISO1044BDR functional block diagram and power recommendations section.
What safety certifications apply to the ISO1044BDR?
The ISO1044BDR is certified to DIN VDE V 0884-11:2017-01 (reinforced insulation), UL 1577 (3000 VRMS), and planned certifications for IEC 62368-1, IEC 60950-1, and GB 4943.1-2011. These are explicitly listed in Sections 1, 6.6, and 6.7 of the TI datasheet. The device achieves 450 VRMS working voltage and 5000 VPK surge isolation - making ISO1044BDR suitable for safety-rated subsystems in elevators, battery chargers, and industrial power supplies.
How does the ISO1044BDR handle undervoltage conditions?
The ISO1044BDR implements independent undervoltage lockout (UVLO) on both VCC1 and VCC2. VCC1 UVLO triggers at 1.0 V (falling) / 1.7 V (rising) with 80–125 mV hysteresis; VCC2 UVLO activates at 3.8–4.25 V (falling) / 4.2–4.45 V (rising) with 200 mV hysteresis. Per Section 6.9 of the datasheet, this prevents erroneous bus states during power ramp-up or brownout - ensuring ISO1044BDR remains inactive until both sides are stably powered, critical for fail-safe operation in PLC backplanes.
What is the purpose of the dominant time-out (DTO) feature in the ISO1044BDR?
ISO1044BDR's dominant time-out (DTO) limits bus dominant state duration to 1.2–3.8 ms, preventing indefinite bus lock-up if the TXD input is held LOW due to MCU failure or software crash. As defined in Section 1 (Features) and Section 6.10, DTO automatically forces the bus recessive after timeout - eliminating need for external watchdog circuitry. This enhances reliability in ISO1044BDR-based systems like AC drives and battery management units where communication integrity is safety-critical.
ISO1044BDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- CANbus
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 100 mV
- Data Rate:
- 5Mbps
- Voltage - Supply:
- 1.71V ~ 1.89V, 2.25V ~ 5.5V, 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISO1044BDR FAQ
1.How can I place an order for ISO1044BDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO1044BDR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISO1044BDR reliable?
The price and inventory of ISO1044BDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO1044BDR is usually 5 days.
3.What payment methods are accepted for ISO1044BDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO1044BDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO1044BDR?
ISO1044BDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO1044BDR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISO1044BDR?
For technical support, including ISO1044BDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO1044BDR requirements.
6.How does Aetrix verify that ISO1044BDR is sourced from the original manufacturer or authorized distributors?
All ISO1044BDR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISO1044BDR meets industry standards.
7.What is the process for return or replacement of ISO1044BDR?
All ISO1044BDR units undergo pre-shipment inspection (PSI). If there is an issue with ISO1044BDR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISO1044BDR part is unused and in its original packaging.
Return procedure for ISO1044BDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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