ISOW6441 - 150Mbps Isolator w/ Integrated DC-DC | TI
MPN: ISOW6441 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.16 | $416.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.35 | $3,350.00 |
Drop-in alternatives for ISOW6441 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ISOW6441F
β Drop-Inπ Reference alternative (not in catalog)
ISOW6442
β Drop-Inπ Reference alternative (not in catalog)
ISOW7741
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ISOW7841
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ISO6441DW
β‘ Same Packageπ Reference alternative (not in catalog)
ADuM1401BRWZ
β‘ Same Packageπ Reference alternative (not in catalog)
ISOW6441 Maximum Ratings & Electrical Characteristics
| Channels | 4 (3 forward / 1 reverse) |
| Data Rate | 150 Mbps |
| Isolation Rating | 5000 Vrms (UL 1577) |
| CMTI | 200 kV/us minimum |
| Integrated DC-DC Output Power | 550 mW |
| Isolated Output Voltage | Selectable 3.3 V or 5 V |
| Output Ripple | 30 mV |
| Emissions | CISPR 32 Class-B compliant on 2-layer board |
| Default Output on Input Loss | High (F-suffix variant defaults low) |
| Isolation Technology | Capacitive (TI proprietary) |
| Package | SOIC-16 wide (DW), 7.50 mm width |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C |
| RoHS Status | Compliant |
| Typical Application | Isolated SPI, UART |
ISOW6441 Pin Configuration
| Pin 1 | VCC1 β Side-1 supply voltage |
| Pin 2 | GND1 β Side-1 ground |
| Pin 3 | A1 β Side-1 forward channel input 1 |
| Pin 4 | A2 β Side-1 forward channel input 2 |
| Pin 5 | A3 β Side-1 forward channel input 3 |
| Pin 6 | B1 β Side-1 reverse channel output |
| Pin 8 | SW1 β DC-DC converter transformer terminal 1 |
| Pin 9 | SW2 β DC-DC converter transformer terminal 2 |
| Pin 11 | VISOOUT β Isolated power output (3.3V/5V selectable) |
| Pin 12 | VISOGND β Isolated power ground |
| Pin 13 | B4 β Side-2 forward channel output 3 |
| Pin 14 | B3 β Side-2 forward channel output 2 |
| Pin 15 | B2 β Side-2 forward channel output 1 |
| Pin 16 | A4 β Side-2 reverse channel input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ISOW6441 is suitable for 6 applications: Isolated SPI in Industrial Automation, Isolated UART / RS-232 Links, Motor Drive Gate-Driver Supply Isolation, Power-Supply Feedback Isolation, Battery Management System (BMS) Communication, Test and Measurement Equipment.
Isolated SPI in Industrial Automation
The ISOW6441 maps its 3 forward / 1 reverse channel configuration directly onto SPI (MOSI, SCLK, CS forward; MISO reverse) at up to 150 Mbps, far exceeding typical SPI clock rates. The integrated DC-DC converter supplies the isolated side with selectable 3.3V or 5V at up to 550 mW, powering an ADC or microcontroller across the barrier without a separate isolated supply. This cuts board area and BOM cost in PLC and factory automation modules, while 5000 Vrms reinforced isolation and 200 kV/us CMTI protect logic from industrial ground potential differences.
Recommended
Isolated UART / RS-232 Links
For two-wire UART isolation, the ISOW6441's 3/1 channel map accommodates TXD, RTS and control lines forward with RXD reverse, with generous speed margin at 150 Mbps. The integrated 550 mW power converter powers the isolated-side transceiver or sensor at 3.3V or 5V with only 30 mV ripple, ensuring clean signal levels. Its CISPR 32 Class-B compliance on 2-layer boards (per TI SBAA810) simplifies EMC certification of industrial communication nodes, and the default-high output state supports fail-safe UART idle-high conventions on the non-F variant.
Recommended
Motor Drive Gate-Driver Supply Isolation
In motor inverters, the ISOW6441 carries PWM and enable signals across the reinforced 5000 Vrms barrier to controller-side circuitry, while its integrated converter provides isolated logic power for gate-driver auxiliary circuits. The 200 kV/us minimum CMTI withstands the steep dv/dt transients generated by fast-switching IGBT and SiC stages. Selectable 3.3V/5V output with 30 mV ripple supports clean analog supervisory circuits on the isolated side, and CISPR 32-optimized emissions help motor drives meet conducted/radiated EMC standards without additional filtering.
Recommended
Power-Supply Feedback Isolation
The ISOW6441 provides isolated feedback paths in AC-DC and DC-DC power supplies, carrying PWM control and status signals across the barrier while the integrated converter eliminates the dedicated feedback-bias transformer winding or auxiliary flyback circuit. Low 30 mV output ripple preserves the accuracy of isolated-side sensing circuits, and reinforced 5000 Vrms isolation supports safety-critical off-line designs. Emissions optimized to CISPR 32 Class B on a 2-layer board (TI SBAA810) reduces the cost of EMC compliance in compact power supplies.
Recommended
Battery Management System (BMS) Communication
In battery packs, the ISOW6441 isolates the pack-side BMS controller (e.g., BQ76952 monitor) from the vehicle or system controller, carrying SPI or UART traffic at high speed while its integrated 550 mW converter powers pack-side logic at 3.3V or 5V. Reinforced 5000 Vrms isolation and 200 kV/us CMTI address the high common-mode voltages and transients inherent in series cell stacks. Eliminating a separate isolated DC-DC module shrinks BMS PCB area - critical in dense module architectures - while CISPR 32-optimized emissions ease automotive EMC testing.
Recommended
Test and Measurement Equipment
Bench instruments, data-acquisition front ends, and probe interfaces use the ISOW6441 to float measurement circuitry from ground-referenced controllers. The 150 Mbps rate supports high-throughput serial ADC readout, and the integrated isolated supply powers remote front-end components at selectable 3.3V/5V with low 30 mV noise-ripple. Default-high output behavior simplifies power-up logic, and TI's ISOW6441DWEEVM evaluation module accelerates prototyping. Reinforced 5000 Vrms isolation provides user safety isolation required in mains-connected measurement equipment.
Recommended
Recommended Products Summary
Engineering reference data for ISOW6441 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISOW6441F | ISOW6442 | ISOW7841 | ISO6441DW | ADuM1401BRWZ |
|---|---|---|---|---|---|---|
| Package | SOIC-16 wide (DW) | SOIC-16 wide (DW) - same | SOIC-16 wide (DW) - same | SOIC-16 wide (DW) - same | SOIC-16 wide (DW) - same | SOIC-16 wide (RW-16) - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Data Rate | 150 Mbps | 150 Mbps | 150 Mbps | [DATA_NEEDED] | 150 Mbps | [DATA_NEEDED] |
| Integrated DC-DC Power | 550 mW, 3.3V/5V selectable | 550 mW, 3.3V/5V selectable | 550 mW, 3.3V/5V selectable | Yes (integrated) | None | None |
| Channel Configuration | 3 forward / 1 reverse | 3 forward / 1 reverse | 2 forward / 2 reverse | 3 forward / 1 reverse | 3 forward / 1 reverse | 3 forward / 1 reverse |
| Isolation Rating | 5000 Vrms (UL 1577) | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms [DATA_NEEDED] |
| CMTI | 200 kV/us minimum | 200 kV/us | 200 kV/us | [DATA_NEEDED] | 200 kV/us | [DATA_NEEDED] |
| Default Output on Input Loss | High | Low | High | High | High | [DATA_NEEDED] |
Key Differentiators
- Best-in-class low EMI emissions (vs ADuM1401BRWZ)
- Integrated isolated power supply (vs ISO6441DW)
- Fail-safe output polarity choice (vs ISOW6441F)
- Newer generation integrated-power isolator (vs ISOW7841)
Design Notes
Follow the datasheet recommended layout exactly to achieve the specified CISPR 32 Class-B radiated emissions on a 2-layer board (validated on the ISOW6441DWEEVM per TI SBAA810). Keep SW1/SW2 transformer loop area minimal, place VCC1 and VISOGND/VISOOUT decoupling capacitors close to pins, and maintain the reinforced-isolation clearance and creepage distances under the DW package barrier on both PCB layers.
The integrated DC-DC delivers up to 550 mW with selectable 3.3V or 5V output. Budget the isolated-side load within this limit, including transients. The output ripple is only 30 mV, suitable for sensitive analog circuits, but add local bulk and 0.1uF ceramic decoupling at the VISOGND/VISOOUT pins for pulsed loads such as radio or MCU wakeups.
Do not confuse the ISOW6441 (default output high on input loss) with the ISOW6441F (default low) when ordering - the fail-safe polarity must match your controller's idle state. Also verify channel direction (3/1 vs the ISOW6442's 2/2) against your SPI/UART mapping before layout; both share the same DW footprint but differ in pin function.
Compliance Information
RoHS compliant per TI product page. Emissions compliance: CISPR 32 Class-B on 2-layer board per TI SBAA810. Isolation certified to UL 1577 (5000 Vrms) per TI datasheet.
