ISOW6441 - 150Mbps Isolator w/ Integrated DC-DC | TI
MPN： ISOW6441 ✓ 啟用中ISOW6441 概覽
A digital isolator provides galvanic isolation between two circuits while allowing digital signals to cross the isolation barrier via capacitive coupling, without a direct electrical connection. Within the isolation component hierarchy, the ISOW6441 belongs to the power-integrated digital isolator family - combining signal isolation with isolated power delivery, a subset of interface and signal isolation ICs.
Key features include 150 Mbps data rate, 5000 Vrms isolation rating per UL 1577, 200 kV/us common-mode transient immunity (CMTI), and a selectable isolated output voltage of 3.3V or 5V with low 30 mV output ripple. The integrated DC-DC converter is emission-optimized to meet CISPR 32 Class-B on a 2-layer board, a best-in-class achievement per TI application note SBAA810.
Technically, the ISOW6441 uses TI proprietary capacitive isolation technology for high-speed, low-power data transfer, and a push-pull converter topology with an integrated transformer for efficient, low-EMI power delivery. Default output is high on input signal loss (non-F variant); the F-suffix ISOW6441F defaults low. Operating temperature spans -40C to +125C.
Typical applications include isolated SPI in industrial automation, isolated UART links, motor drive gate-driver supplies, and power-supply feedback isolation, where the integrated power eliminates a separate isolated DC-DC converter, reducing board space and BOM cost.
Design tip: achieve specified CISPR 32 compliance by following the recommended datasheet PCB layout, maintaining adequate clearance/creepage for the reinforced isolation rating, and placing decoupling capacitors close to supply pins.
直接替換替代品，適用於 ISOW6441 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
ISOW6441F
✅ 直接替換📋 參考替代品（不在目錄中）
ISOW6442
✅ 直接替換📋 參考替代品（不在目錄中）
ISOW7741
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ISOW7841
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ISO6441DW
⚡ 相同封裝📋 參考替代品（不在目錄中）
ADuM1401BRWZ
⚡ 相同封裝📋 參考替代品（不在目錄中）
ISOW6441 最大額定值與電氣特性
| 通道數 | 4 (3 forward / 1 reverse) |
| 資料速率 | 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) |
| 封裝 | SOIC-16 wide (DW), 7.50 mm width |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +125C |
| RoHS 狀態 | Compliant |
| Typical Application | Isolated SPI, UART |
ISOW6441 腳位配置
| 腳位 1 | VCC1 — Side-1 supply voltage |
| 腳位 2 | GND1 — Side-1 ground |
| 腳位 3 | A1 — Side-1 forward channel input 1 |
| 腳位 4 | A2 — Side-1 forward channel input 2 |
| 腳位 5 | A3 — Side-1 forward channel input 3 |
| 腳位 6 | B1 — Side-1 reverse channel output |
| 腳位 8 | SW1 — DC-DC converter transformer terminal 1 |
| 腳位 9 | SW2 — DC-DC converter transformer terminal 2 |
| 腳位 11 | VISOOUT — Isolated power output (3.3V/5V selectable) |
| 腳位 12 | VISOGND — Isolated power ground |
| 腳位 13 | B4 — Side-2 forward channel output 3 |
| 腳位 14 | B3 — Side-2 forward channel output 2 |
| 腳位 15 | B2 — Side-2 forward channel output 1 |
| 腳位 16 | A4 — Side-2 reverse channel input |
典型應用
ISOW6441 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ISOW6441 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
| 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 |
主要差異化特點
- Best-in-class low EMI emissions (對比ADuM1401BRWZ)
- Integrated isolated power supply (對比ISO6441DW)
- Fail-safe output polarity choice (對比ISOW6441F)
- Newer generation integrated-power isolator (對比ISOW7841)
設計說明
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.
合規資訊
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.
