ISO7842FDWW - Reinforced 4-Ch Digital Isolator | TI
MPN: ISO7842FDWW ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.47 | $1,235.00 |
| 1,000 | $2.19 | $2,190.00 |
Drop-in alternatives for ISO7842FDWW — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISO7842FDWR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7842FDW
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7742FDBQR
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →ISO7741FDBQR
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →ADUM1401ARWZ
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →ADUM1411ARWZ
✅ Drop-In✓ In Stock
$1.75 / Unit
View Datasheet →ISO7842FDWW Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 (2 forward, 2 reverse) |
| Isolation Voltage | 8000 VPK |
| Isolation Rating (Vrms) | 5700 Vrms |
| Data Rate | 100 Mbps |
| CMTI | 100 kV/µs |
| Propagation Delay | 11 ns (typical) |
| Supply Voltage Range | 2.25 V to 5.5 V |
| Level Translation | 2.25 V to 5.5 V |
| Operating Temperature Range | -55°C to +125°C |
| Power Consumption | 1.7 mA per channel at 1 Mbps (typical) |
| Package Type | SOIC-16 (DWW) extra-wide body |
| Creepage Distance | 14.5 mm |
| Certifications | VDE, CSA, CQC, TUV (reinforced) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ISO7842FDWW Pin Configuration
| Pin 1 | VCC1 — Supply voltage for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | INA — Input channel A (side 1) |
| Pin 4 | INB — Input channel B (side 1) |
| Pin 5 | OUTC — Output channel C (side 1) |
| Pin 6 | OUTD — Output channel D (side 1) |
| Pin 7 | GND1 — Ground for side 1 |
| Pin 8 | EN1 — Enable for side 1 outputs |
| Pin 9 | EN2 — Enable for side 2 outputs |
| Pin 10 | GND2 — Ground for side 2 |
| Pin 11 | IND — Input channel D (side 2) |
| Pin 12 | INC — Input channel C (side 2) |
| Pin 13 | OUTB — Output channel B (side 2) |
| Pin 14 | OUTA — Output channel A (side 2) |
| Pin 15 | GND2 — Ground for side 2 |
| Pin 16 | VCC2 — Supply voltage for side 2 |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ISO7842FDWW is suitable for 6 applications: Industrial Fieldbus Communication, Motor Drives and Inverters, Isolated SPI/UART Interfaces, Power Converters and SMPS, Medical Equipment, Test and Measurement Instruments.
Industrial Fieldbus Communication
The ISO7842FDWW provides galvanic isolation for industrial fieldbus interfaces such as PROFIBUS, CAN, and RS-485. Its 100 Mbps data rate and high CMTI of 100 kV/µs ensure reliable communication in electrically noisy environments. The 2/2 channel configuration allows bidirectional data transfer, and the wide supply range (2.25V to 5.5V) enables level translation between different logic domains. The reinforced isolation (8000 VPK) protects sensitive controllers from voltage transients and ground loops, enhancing system safety and reliability.
Recommended
Motor Drives and Inverters
In motor drives and inverters, the ISO7842FDWW isolates gate driver signals and feedback paths. Its high CMTI (100 kV/µs) prevents false triggering during fast switching transients, and the 100 Mbps data rate supports high-frequency PWM signals. The wide temperature range (-55°C to +125°C) suits harsh industrial environments. The reinforced isolation (8000 VPK) provides safety isolation between high-voltage power stages and low-voltage control circuits, meeting international safety standards.
Recommended
Isolated SPI/UART Interfaces
The ISO7842FDWW is ideal for isolating SPI or UART communication between microcontrollers and peripheral devices. Its 2/2 channel configuration can isolate clock, data, and control signals, while the 100 Mbps data rate supports high-speed SPI. The low propagation delay (11 ns) minimizes signal latency, and the wide supply range allows interfacing with different logic levels. The reinforced isolation ensures safe operation in medical and industrial equipment where galvanic isolation is required.
Recommended
Power Converters and SMPS
In power converters and switched-mode power supplies (SMPS), the ISO7842FDWW isolates feedback and control signals across the isolation barrier. Its high CMTI (100 kV/µs) ensures stable operation in the presence of high dv/dt transients, and the 100 Mbps data rate supports fast control loops. The wide supply range (2.25V to 5.5V) enables level translation between primary and secondary side controllers. The reinforced isolation (8000 VPK) provides safety isolation for high-voltage applications.
Recommended
Medical Equipment
The ISO7842FDWW is used in medical devices requiring galvanic isolation for patient safety. Its reinforced isolation (8000 VPK) meets stringent safety standards, and the low power consumption (1.7 mA per channel) is suitable for battery-powered devices. The wide temperature range and high reliability make it suitable for diagnostic equipment, patient monitors, and imaging systems. The 100 Mbps data rate supports high-speed data acquisition and communication.
Recommended
Test and Measurement Instruments
In test and measurement equipment, the ISO7842FDWW isolates measurement circuits from host controllers, preventing ground loops and noise interference. Its high CMTI (100 kV/µs) ensures accurate measurements in electrically noisy environments, and the 100 Mbps data rate supports high-speed data transfer. The wide supply range allows interfacing with various logic levels, and the reinforced isolation provides safety for high-voltage measurements. The device's low propagation delay (11 ns) is critical for precise timing.
Recommended
Recommended Products Summary
Engineering reference data for ISO7842FDWW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO7842FDWR | ISO7842FDW | ISO7742FDBQR | ADUM1401ARWZ |
|---|---|---|---|---|---|
| Package | SOIC-16 (DWW) | SOIC-16 (DW) | SOIC-16 (DW) | SOIC-16 (DW) | SOIC-16 (DW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Isolation Voltage (VPK) | 8000 | 8000 | 8000 | 5000 | 2500 |
| Data Rate (Mbps) | 100 | 100 | 100 | 100 | 90 |
| CMTI (kV/µs) | 100 | 100 | 100 | 85 | 25 |
| Propagation Delay (ns) | 11 | 11 | 11 | 10.7 | 50 |
| Supply Voltage Range (V) | 2.25 to 5.5 | 2.25 to 5.5 | 2.25 to 5.5 | 2.25 to 5.5 | 2.7 to 5.5 |
| Operating Temperature (°C) | -55 to 125 | -55 to 125 | -55 to 125 | -55 to 125 | -40 to 105 |
Key Differentiators
- Highest isolation rating in the ISO7842 family (vs ISO7742FDBQR)
- Higher CMTI than many competitors (vs ADUM1401ARWZ)
- Wider temperature range (vs ADUM1401ARWZ)
Design Notes
For the ISO7842FDWW, maintain at least 14.5 mm creepage distance between the high-voltage and low-voltage sides on the PCB to preserve the reinforced isolation rating. Use a slot or cutout under the device to increase creepage if needed. Place decoupling capacitors (0.1 µF and 10 µF) close to each VCC pin, and ensure a solid ground plane on each side.
To achieve the specified CMTI of 100 kV/µs, minimize parasitic capacitance between the input and output sides. Avoid routing high-speed signals parallel to the isolation barrier, and keep the barrier area clear of copper. Use proper grounding techniques, such as a star ground or separate ground planes, to reduce noise coupling.
Do not exceed the absolute maximum supply voltage of 6V on either side. Ensure that the enable pins (EN1, EN2) are properly driven to avoid unintended output states. When the input side is unpowered, the outputs default to a fail-safe state; verify this behavior in your system design. Also, note that the DWW package has a wider body than the DW package, so ensure your PCB footprint matches the correct package.
Compliance Information
RoHS compliant per TI product page. Reinforced isolation certifications per VDE, CSA, CQC, and TUV. Not AEC-Q100 qualified.
