ISO7741FDBQR - 4-Ch 100Mbps Digital Isolator | TI
MPN: ISO7741FDBQR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.05 | $205.00 |
| 500 | $1.68 | $840.00 |
| 1,000 | $1.42 | $1,420.00 |
Drop-in alternatives for ISO7741FDBQR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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ISO7741DBQR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7741FDBQR Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Channel Configuration | 3 forward / 1 reverse |
| Isolation Rating | 3000 Vrms (DBQ package) |
| Data Rate | 100 Mbps |
| Common-Mode Transient Immunity (CMTI) | 85 kV/µs |
| Propagation Delay (tpLH / tpHL) | 16 ns / 16 ns (max) |
| Pulse Width Distortion (PWD) | 4.9 ns (max) |
| Rise / Fall Time | 2.4 ns / 2.4 ns (typ) |
| Default Output State | Low (F suffix) |
| Supply Voltage (VCC1/VCC2) | 2.25 V to 5.5 V |
| Operating Temperature Range | -55°C to +125°C |
| Package Type | SSOP-16 (DBQ) |
| Mounting Type | Surface Mount |
| Isolation Standard | UL 1577, VDE, CSA, TUV, CQC |
| RoHS Status | Compliant |
ISO7741FDBQR Pin Configuration
| Pin 1 | VCC1 — Supply voltage for side 1 (2.25V to 5.5V) |
| 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 | INC — Input channel C (side 1) |
| Pin 6 | OUTD — Output channel D (side 1) |
| Pin 7 | GND1 — Ground for side 1 |
| Pin 8 | VCC1 — Supply voltage for side 1 |
| Pin 9 | VCC2 — Supply voltage for side 2 (2.25V to 5.5V) |
| Pin 10 | GND2 — Ground for side 2 |
| Pin 11 | OUTA — Output channel A (side 2) |
| Pin 12 | OUTB — Output channel B (side 2) |
| Pin 13 | OUTC — Output channel C (side 2) |
| Pin 14 | IND — Input channel D (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
ISO7741FDBQR is suitable for 6 applications: Industrial Automation PLCs, Motor Drives, Solar Inverters, Medical Equipment, Automotive Battery Management Systems, Isolated SPI/UART Communication.
Industrial Automation PLCs
The ISO7741FDBQR provides robust isolation for PLC I/O modules, protecting control logic from high-voltage transients and ground loops. With 3000 Vrms isolation and 85 kV/µs CMTI, it ensures reliable communication between field sensors and the PLC CPU in noisy industrial environments. Its 100 Mbps data rate supports high-speed fieldbus interfaces like PROFIBUS and EtherCAT, while the default-low output state ensures safe power-up behavior. The compact SSOP-16 package saves board space in dense I/O cards, and the wide -55°C to +125°C range suits harsh factory floors.
Recommended
Motor Drives
In motor drives, the ISO7741FDBQR isolates gate driver signals and feedback from the high-voltage power stage. Its 85 kV/µs CMTI prevents false triggering from fast switching transients, and the 100 Mbps data rate handles high-speed PWM signals. The reinforced 3000 Vrms isolation meets safety standards for motor control, while the default-low output ensures the motor stays off during power-up. The device's robust-EMC design reduces radiated emissions, simplifying EMC compliance in CE-marked drives. Operating from 2.25V to 5.5V, it interfaces directly with MCUs and gate drivers.
Recommended
Solar Inverters
The ISO7741FDBQR isolates communication between the MPPT controller and the inverter power stage, ensuring safe operation in high-voltage solar systems. Its 3000 Vrms reinforced isolation protects low-voltage control electronics from DC bus voltages up to 1000V. The 100 Mbps data rate supports fast communication for real-time monitoring and control, while the 85 kV/µs CMTI ensures reliable operation during switching transients. The default-low output state prevents unintended inverter activation during power-up, enhancing system safety. The wide temperature range suits outdoor installations.
Recommended
Medical Equipment
The ISO7741FDBQR provides reinforced isolation for patient monitoring and diagnostic equipment, meeting stringent safety standards like UL 1577 and IEC 60601. Its 3000 Vrms isolation protects patients and operators from leakage currents, while the 100 Mbps data rate supports high-speed data acquisition from sensors. The default-low output ensures safe power-up in critical medical systems. The compact SSOP-16 package is ideal for portable devices, and the -55°C to +125°C range covers sterilization and operating environments. The robust-EMC design minimizes interference with sensitive medical electronics.
Recommended
Automotive Battery Management Systems
The ISO7741FDBQR isolates communication between battery cells and the BMS controller, ensuring safe operation in high-voltage EV battery packs. Its 3000 Vrms reinforced isolation protects low-voltage electronics from up to 800V pack voltages, and the 85 kV/µs CMTI ensures reliable data transfer during switching transients. The 100 Mbps data rate supports high-speed daisy-chain communication, while the default-low output prevents unintended cell balancing during power-up. The -55°C to +125°C range meets automotive temperature requirements, and the compact SSOP-16 package fits space-constrained BMS modules.
Recommended
Isolated SPI/UART Communication
The ISO7741FDBQR provides isolated SPI and UART interfaces for sensors, ADCs, and microcontrollers in noisy environments. Its 100 Mbps data rate supports high-speed SPI clocks up to 50 MHz, while the 3/1 channel configuration accommodates MOSI, MISO, SCLK, and CS signals. The 3000 Vrms isolation protects logic from ground potential differences, and the 85 kV/µs CMTI ensures error-free data transfer in industrial settings. The default-low output state prevents bus contention during power-up. The device's low propagation delay (16 ns) and pulse width distortion (4.9 ns) maintain signal integrity for reliable communication.
Recommended
Recommended Products Summary
Engineering reference data for ISO7741FDBQR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO7741DBQR | ISO7741DWR | ADuM1401BRWZ |
|---|---|---|---|---|
| Package | SSOP-16 (DBQ) | SSOP-16 (DBQ) | SOIC-16 (DW) | SOIC-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Isolation Rating | 3000 Vrms | 3000 Vrms | 5000 Vrms | 2500 Vrms |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
| CMTI | 85 kV/µs | 85 kV/µs | 85 kV/µs | 25 kV/µs |
| Default Output State | Low | High | High | High |
| Propagation Delay (max) | 16 ns | 16 ns | 16 ns | 50 ns |
| Operating Temperature | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -40°C to +105°C |
Key Differentiators
- Higher CMTI than many competitors (vs ADuM1401BRWZ)
- Lower propagation delay (vs ADuM1401BRWZ)
- Reinforced isolation rating (vs ADuM1401BRWZ)
Design Notes
Place 0.1 µF decoupling capacitors close to each VCC pin (VCC1 and VCC2) to ensure stable operation. Use a 10 µF bulk capacitor on each supply rail if the power source is far. Keep the isolation barrier clear of copper traces to maintain creepage and clearance distances required for 3000 Vrms isolation.
Maintain a minimum creepage distance of 4 mm between the high-voltage and low-voltage sides on the PCB for 3000 Vrms reinforced isolation. Use a slot or cutout under the device to increase the creepage path if needed. Route high-speed signals with controlled impedance to minimize reflections and EMI.
Do not exceed the absolute maximum supply voltage of 6V on VCC1 or VCC2. Ensure both supplies are powered for proper operation; if one side is unpowered, the default-low output state (F suffix) ensures a known state. Avoid floating input pins - tie unused inputs to GND or VCC to prevent oscillation.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified, but suitable for automotive applications per TI's product description.
