ISO7741FDBQR - 4-Ch 100Mbps Digital Isolator | TI
MPN: ISO7741FDBQR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.9813 | $0.98 |
| 10 | $0.88 | $8.80 |
| 100 | $0.79 | $79.00 |
| 500 | $0.71 | $355.00 |
| 1,000 | $0.64 | $640.00 |
Drop-in alternatives for ISO7741FDBQR — 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:
ISO7741DBQR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7741BDBQR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7740FDBQR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7742FDBQR
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →ISO7743FDBQR
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7741FDBQR Maximum Ratings & Electrical Characteristics
| Type | Digital Isolator |
| Number of Channels | 4 |
| Channel Configuration | 3 forward / 1 reverse |
| Isolation Voltage | 3000 Vrms (DBQ package) |
| Data Rate | 100 Mbps |
| CMTI | 85 kV/µs |
| Package | 16-SSOP (DBQ) 0.154" body width |
| Pin Count | 16 |
| Operating Temperature | -55°C to +125°C |
| Output Default State | Low (F suffix) |
| Isolation Rating | Reinforced (UL 1577) |
| Safety Certifications | VDE, CSA, TUV, CQC |
| Supply Voltage Range | [DATA_NEEDED: Supply Voltage Range] |
| Propagation Delay | [DATA_NEEDED: Propagation Delay] |
| Packaging | Tape & Reel |
| Mounting Type | Surface Mount |
ISO7741FDBQR 16-ssop (dbq) 0.154" body width Pin Configuration Guide
Complete pinout information for ISO7741FDBQR (16-ssop (dbq) 0.154" body width package) with 16 pins. This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ISO7741FDBQR.
Refer to the datasheet for full pin configuration.
Estimated pin count: 16 pins (digital package)
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 PLC, Motor Drives, Medical Equipment, Solar Inverters, Automotive Battery Management, Isolated SPI/UART Communication.
Industrial Automation PLC
In PLC systems, the ISO7741FDBQR isolates digital inputs, output modules, and fieldbus communication. Its 100 Mbps data rate supports high-speed sensor interfaces and 85 kV/µs CMTI ensures reliable operation in electrically noisy industrial environments. With 3000 Vrms reinforced isolation, it protects the controller from transients on factory-floor wiring. Place the isolator between the backplane MCU and field-side connectors. Recommended companion parts: TPS26600RHFR (eFuse power protection), ISO1042BDWVR (isolated CAN transceiver for fieldbus), and TLV2452AIDGKR (op-amp for signal conditioning).
Recommended
Motor Drives
Motor drive inverters require isolated feedback channels to transmit PWM and fault signals across high-voltage domains. The ISO7741FDBQR's high CMTI (85 kV/µs) prevents false triggering during IGBT/GaN switching transients. Its 3/1 channel configuration can carry three PWM signals from the MCU to the gate driver and one reverse fault/status signal. The 3000 Vrms isolation protects low-voltage control logic. Recommended companions: ADUM3223ARWZ isolated gate driver, TPS26600RHFR input protection, and INA219AIDCNR for current sensing.
Recommended
Medical Equipment
Medical devices such as patient monitors and infusion pumps require galvanic isolation to ensure patient safety and reduce leakage currents. The ISO7741FDBQR provides 3000 Vrms reinforced isolation per UL 1577, suitable for diagnostic interfaces. Its 100 Mbps speed handles high-throughput data from sensors and ADC front-ends. The default-low output state provides defined start-up behavior. Recommended companions: TPS7A4700RGWR low-noise LDO, INA219AIDCNR current sensor, ADS1115IDGSR ADC for analog sensor acquisition.
Recommended
Solar Inverters
Solar inverters benefit from isolation between the DSP/MCU and power stage communication. The ISO7741FDBQR transfers PWM and status signals with 100 Mbps speed and 85 kV/µs CMTI, ensuring integrity amid high dV/dt. Its SSOP-16 package minimizes board area in dense inverters. Reinforced insulation covers the high DC bus voltage. Recommended companions: ISO1042BDWVR for isolated CAN to monitoring systems, BQ25601RTWR battery charger controller in hybrid systems, and DAC80508ZYZFR for trimming or control outputs.
Recommended
Automotive Battery Management
In BMS and automotive sub-systems, the ISO7741FDBQR provides isolation for communication between battery monitoring front-end and the main controller. Its wide operating temperature range (-55°C to +125°C) is ideal for automotive underhood environments. The 85 kV/µs CMTI handles transients from motors and solenoids. The F (default-low) variant ensures outputs are low during power-up to avoid unintended actuator activation. Recommended companions: ISO1042BDWVR isolated CAN, TPS65381A-Q1 multi-rail PMIC, BQ24610RGER charge controller.
Recommended
Isolated SPI/UART Communication
When isolating SPI or UART between processors, the ISO7741FDBQR's 3/1 channel configuration is ideal: three forward channels carry SCLK, MOSI, CS, and one reverse channel carries MISO. Running at up to 100 Mbps, it easily supports multi-megabit SPI buses. The SSOP-16 package and 3000 Vrms rating suit board-level isolation in servers, PLCs, and measurement devices. Recommended companions: DAC80508ZYZFR DAC, ADS1115IDGSR ADC, and LMP7721MA/NOPB precision amplifier for front-end conditioning.
Recommended
Recommended Products Summary
Engineering reference data for ISO7741FDBQR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO7741DBQR | ISO7741BDBQR | ISO7740FDBQR | ISO7742FDBQR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SSOP-16 (DBQ) | SSOP-16 (DBQ) | SSOP-16 (DBQ) | SSOP-16 (DBQ) | SSOP-16 (DBQ) |
| Isolation Voltage | 3000 Vrms | 3000 Vrms | 3000 Vrms | 3000 Vrms | 3000 Vrms |
| Number of Channels | 4 | 4 | 4 | 4 | 4 |
| Channel Configuration | 3/1 | 3/1 | 3/1 | 4/0 | 2/2 |
| Default Output State | Low | High | Low | Low | Low |
| Isolation Rating | Reinforced | Reinforced | Basic | Reinforced | Reinforced |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
Key Differentiators
- Default-low output state (F suffix) (vs ISO7741DBQR)
- 3/1 channel configuration (vs ISO7740FDBQR)
- Reinforced isolation in SSOP-16 package (vs ISO7741BDBQR)
Design Notes
Provide stable supplies to both VCC1 and VCC2 pins with 0.1 µF and 1 µF bypass capacitors placed as close to the pins as possible. The ISO7741FDBQR can operate over a wide supply range, but verify exact voltage limits in the datasheet. Avoid long supply traces to prevent glitches that could affect high-speed transmission.
Maintain creepage and clearance distances between the high-voltage and low-voltage areas. For reinforced isolation per UL 1577, follow the recommended minimum distances in the TI datasheet. Keep the PCB surface clean and consider a ground pour on both sides to reduce coupling.
Although the ISO7741FDBQR has low power dissipation, operation at 100 Mbps in high-temperature environments can elevate junction temperature. Use a PCB copper plane connected to the GND pins to assist heat spreading. Derate for ambient temperature if necessary.
Do not leave unused input pins floating. Tie them to GND or supply as appropriate. The default-low F variant ensures outputs are low when the input supply is off, but if your system expects a high default state, select the non-F (ISO7741DBQR) instead. Verify the output logic level compatibility with the downstream device.
Compliance Information
The provided web data mentions safety certifications (UL 1577, VDE, CSA, TUV, CQC) but does not explicitly list RoHS/REACH status. Verify compliance on TI product page.
