ISO7742FDBQR - Reinforced 4-Ch Digital Isolator | TI
MPN: ISO7742FDBQR β 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 ISO7742FDBQR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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ISO7742DBQR
β Drop-Inπ Reference alternative (not in catalog)
ISO7741FDBQR
β Drop-Inβ In Stock
$0.64 / Unit
View Datasheet βISO7742FDBQ
β Drop-Inπ Reference alternative (not in catalog)
ISO7742FDBQRQ1
β Drop-Inπ Reference alternative (not in catalog)
ISO7742FDBQR Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Forward/Reverse Channels | 2/2 |
| Data Rate | 100 Mbps |
| Isolation Rating | 5000 Vrms |
| Working Voltage | 1500 Vrms |
| Surge Capability | 12.8 kV |
| CMTI | Β±100 kV/Β΅s (typical) |
| Supply Voltage Range | 2.25 V to 5.5 V |
| Operating Temperature | -55Β°C to 125Β°C |
| Package | 16-SSOP (DBQ) |
| Mounting Type | Surface Mount |
| Isolation Type | Reinforced |
| Propagation Delay | [DATA_NEEDED: propagation delay] |
| Power Consumption | [DATA_NEEDED: power consumption] |
| RoHS Status | Compliant |
ISO7742FDBQR Pin Configuration
| Pin 1 | VCC1 β Supply voltage for side 1 |
| Pin 2 | GND1 β Ground for side 1 |
| Pin 3 | INA β Input channel A |
| Pin 4 | INB β Input channel B |
| Pin 5 | OUTC β Output channel C |
| Pin 6 | OUTD β Output channel D |
| Pin 7 | GND1 β Ground for side 1 |
| Pin 8 | VCC1 β Supply voltage for side 1 |
| Pin 9 | VCC2 β Supply voltage for side 2 |
| Pin 10 | GND2 β Ground for side 2 |
| Pin 11 | OUTA β Output channel A |
| Pin 12 | OUTB β Output channel B |
| Pin 13 | INC β Input channel C |
| Pin 14 | IND β Input channel D |
| Pin 15 | GND2 β Ground for side 2 |
| Pin 16 | VCC2 β 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
ISO7742FDBQR is suitable for 6 applications: Industrial Fieldbus Communication, Motor Drives and Power Inverters, Isolated SPI/UART Interfaces, Medical Equipment Isolation, Renewable Energy Systems, Automotive Electronics.
Industrial Fieldbus Communication
The ISO7742FDBQR provides galvanic isolation for industrial fieldbus interfaces such as PROFIBUS and Modbus. Its 100 Mbps data rate supports high-speed communication, while the reinforced isolation barrier (5000 Vrms) protects against ground loops and voltage transients common in factory automation. The high CMTI of Β±100 kV/Β΅s ensures reliable data transmission in electrically noisy environments, making it ideal for PLCs, sensors, and actuators. When used with a transceiver like ISO1050DUBR, it enables robust, isolated RS-485 communication over long distances, improving system reliability and safety.
Recommended
Motor Drives and Power Inverters
In motor drives and power inverters, the ISO7742FDBQR isolates control signals from high-voltage power stages. Its reinforced isolation rating of 5000 Vrms and surge capability of 12.8 kV protect low-voltage control circuitry from switching transients and high common-mode voltages. The 100 Mbps data rate allows fast PWM signal transmission, while the wide supply range (2.25V to 5.5V) interfaces with both 3.3V and 5V microcontrollers. The high CMTI ensures stable operation during fast switching events, reducing the risk of data corruption. This makes it suitable for variable frequency drives, servo drives, and solar inverters, where reliability and noise immunity are critical.
Recommended
Isolated SPI/UART Interfaces
The ISO7742FDBQR is ideal for isolating SPI or UART communication between microcontrollers and peripheral devices such as ADCs, DACs, or sensors. Its 100 Mbps data rate easily handles SPI clock speeds up to 50 MHz, and the 4-channel configuration (2/2) supports full-duplex communication. The reinforced isolation barrier protects sensitive digital logic from ground potential differences and electrical noise, ensuring data integrity. The device's low propagation delay and high CMTI make it suitable for real-time control systems. When paired with an isolated power supply like the TPS7A4700RGWR, it provides a complete isolated interface solution for industrial and medical applications.
Recommended
Medical Equipment Isolation
In medical devices, patient safety requires galvanic isolation between low-voltage control circuits and high-voltage sections. The ISO7742FDBQR provides reinforced isolation up to 5000 Vrms, meeting stringent safety standards. Its low power consumption and wide temperature range (-55Β°C to 125Β°C) make it suitable for portable and implantable devices. The high CMTI ensures reliable operation in the presence of electromagnetic interference from motors or pumps. The device's fail-safe outputs enhance system safety by ensuring a defined state during power loss. It is commonly used in patient monitors, infusion pumps, and diagnostic equipment, where isolation is critical for patient and operator safety.
Recommended
Renewable Energy Systems
The ISO7742FDBQR is used in solar inverters and wind turbine controllers to isolate communication between the control unit and power conversion stages. Its reinforced isolation barrier (5000 Vrms) and surge capability (12.8 kV) withstand high-voltage transients from the grid and switching operations. The 100 Mbps data rate supports fast communication for maximum power point tracking (MPPT) algorithms. The wide supply range allows direct interface with various microcontrollers, and the high CMTI ensures reliable operation in noisy power environments. This makes it a robust choice for harsh outdoor conditions, where temperature extremes and electrical noise are common.
Recommended
Automotive Electronics
In automotive systems, the ISO7742FDBQR isolates communication between different electronic control units (ECUs) and sensors. Its operating temperature range of -55Β°C to 125Β°C meets automotive requirements, and the reinforced isolation barrier protects against high-voltage transients from the battery and ignition system. The 100 Mbps data rate supports high-speed in-vehicle networks like CAN and FlexRay. The device's high CMTI ensures reliable operation in the presence of electromagnetic interference from motors and relays. For automotive-grade applications, the ISO7742FDBQRQ1 variant is AEC-Q100 qualified, providing enhanced reliability for safety-critical systems such as battery management and motor control.
Recommended
Recommended Products Summary
Engineering reference data for ISO7742FDBQR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO7742DBQR | ISO7741FDBQR | ISO7742DW |
|---|---|---|---|---|
| Package | 16-SSOP (DBQ) | 16-SSOP (DBQ) | 16-SSOP (DBQ) | 16-SOIC (DW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 4 | 4 | 3 | 4 |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
| Isolation Rating | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| CMTI | Β±100 kV/Β΅s | Β±100 kV/Β΅s | Β±100 kV/Β΅s | Β±100 kV/Β΅s |
| Supply Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V |
| Fail-Safe Output | Low | High | Low | Low |
Key Differentiators
- Reinforced isolation with 5000 Vrms rating (vs ISO7742DBQR)
- High CMTI of Β±100 kV/Β΅s (vs ADuM1402BRWZ)
- Wide supply range of 2.25V to 5.5V (vs ISO7742DW)
Design Notes
For optimal isolation performance, maintain proper creepage and clearance distances on the PCB. The ISO7742FDBQR in SSOP package requires at least 4mm creepage for reinforced isolation per IEC 60664. Ensure the isolation barrier is free of copper traces or components that could reduce the isolation distance. Place the device near the board edge to maximize isolation distance between the two sides.
Decouple each supply pin (VCC1 and VCC2) with a 0.1Β΅F ceramic capacitor placed as close as possible to the pin, and a 10Β΅F bulk capacitor nearby. The wide supply range (2.25V to 5.5V) allows operation from 3.3V or 5V rails, but ensure the supply voltage is stable and within the specified range to avoid erratic behavior. For high-speed operation, use low-inductance capacitors to minimize noise.
Do not exceed the absolute maximum ratings, including the isolation voltage. The fail-safe output state (low for 'F' version) should be considered in system design to ensure safe operation during power-up or fault conditions. Also, verify that the input signals do not exceed the supply voltage range, as this can cause latch-up or damage. For high CMTI environments, ensure the PCB layout minimizes parasitic capacitance across the isolation barrier.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; use ISO7742FDBQRQ1 for automotive.
