ISO7742QFDBQRQ1 - 100Mbps Reinforced Digital Isolator | TI
MPN: ISO7742QFDBQRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.21 | $22.10 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.48 | $1,480.00 |
Drop-in alternatives for ISO7742QFDBQRQ1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ISO7742QDBQRQ1
β Drop-Inπ Reference alternative (not in catalog)
ISO7742QDBQQ1
β Drop-Inπ Reference alternative (not in catalog)
ISO7741FQDBQRQ1
β Drop-Inβ In Stock
$1.3 / Unit
View Datasheet βISO7742DBQR
β Drop-Inπ Reference alternative (not in catalog)
ISO7742QFDBQRQ1 Maximum Ratings & Electrical Characteristics
| Isolation Type | Reinforced, capacitive SiO2 barrier |
| Number of Channels | 4 (2 forward / 2 reverse, 2/2) |
| Isolation Rating | 3000 Vrms (DBQ package) per UL 1577 |
| Maximum Data Rate | 100 Mbps |
| CMTI | 85 kV/us |
| Signal Type | CMOS / LVCMOS digital I/O |
| Enable Pins | Yes (high-impedance outputs for multi-master) |
| Automotive Qualification | AEC-Q100 (Q1) |
| Package | 16-SSOP (DBQ), 3.90 mm width |
| Mounting Type | Surface Mount |
| EMC Performance | High electromagnetic immunity, low emissions, low power |
| Power Consumption | Low power [DATA_NEEDED: per-channel supply current] |
| Supply Voltage | [DATA_NEEDED: VCC1/VCC2 range] |
| Operating Temperature | [DATA_NEEDED: temperature range] |
| RoHS Status | [DATA_NEEDED: RoHS status] |
| Default Output State | [DATA_NEEDED: high/low default option] |
ISO7742QFDBQRQ1 16-ssop (dbq), 3.90 mm width Pin Configuration Guide
Complete pinout information for ISO7742QFDBQRQ1 (16-ssop (dbq), 3.90 mm width package) with Yes (high-impedance outputs for multi-master) 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 ISO7742QFDBQRQ1.
Refer to the datasheet for full pin configuration.
Estimated pin count: Yes (high-impedance outputs for multi-master) 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
ISO7742QFDBQRQ1 is suitable for 6 applications: Automotive Battery Management Systems (BMS), Isolated Gate Drive Signaling in Traction Inverters, Isolated CAN / RS-485 Industrial Communication, PLC Digital I/O Isolation, On-Board Charger (OBC) Control Isolation, Isolated ADC Signal Chain Interfaces.
Automotive Battery Management Systems (BMS)
The ISO7742QFDBQRQ1's AEC-Q100 qualification, reinforced 3000 Vrms isolation, and 2/2 channel layout make it ideal for isolating BMS communication between high-voltage battery packs and low-voltage control domains. Placed in the SPI or GPIO path between the cell-monitoring MCU and the pack controller, its SiO2 capacitive barrier sustains the pack-to-chassis isolation requirement, while 100 Mbps bandwidth keeps cell-balancing data latency low. The enable pins allow safe tri-stating during fault conditions.
Recommended
Isolated Gate Drive Signaling in Traction Inverters
With 85 kV/us CMTI and 100 Mbps signaling, the ISO7742QFDBQRQ1 reliably passes PWM signals to isolated gate drivers in SiC/IGBT traction inverters where switching nodes see extreme dV/dt. The reinforced barrier supports the creepage/clearance demands of 400-800 V systems, and low emissions keep adjacent automotive communication links clean. Pairing with a UCC-series isolated gate driver creates a complete two-chip isolation chain from MCU to power module.
Recommended
Isolated CAN / RS-485 Industrial Communication
In industrial nodes, the ISO7742QFDBQRQ1 isolates the UART or GPIO lines feeding CAN or RS-485 transceivers, protecting the controller from ground potential differences and surge events on long cable runs. Its robust EMC immunity suppresses coupled noise from motor drives and switching supplies, while the high-impedance enable outputs support multi-master arbitration. The 100 Mbps rate comfortably exceeds 5 Mbps RS-485 needs with timing margin.
Recommended
PLC Digital I/O Isolation
Programmable logic controller I/O cards use the ISO7742QFDBQRQ1 to separate field-wiring voltages from backplane logic. The 2/2 channel split matches typical read/write signal pairs, and the reinforced isolation rating supports single-device solutions without stacked basic isolators. Its low power consumption and low emissions simplify dense multi-channel card designs, and the 16-SSOP footprint enables high channel density per board area.
Recommended
On-Board Charger (OBC) Control Isolation
In automotive on-board chargers, the ISO7742QFDBQRQ1 carries PWM and status feedback across the isolation barrier between the low-voltage vehicle controller and the high-voltage power stage. The 85 kV/us CMTI withstands fast switching transients from the resonant converter, while 100 Mbps supports high-frequency PWM and rapid fault signaling. AEC-Q100 qualification ensures it meets automotive temperature and reliability requirements.
Recommended
Isolated ADC Signal Chain Interfaces
Precision isolated measurement front ends use the ISO7742QFDBQRQ1 to pass SPI control/data signals to isolated delta-sigma or SAR ADCs monitoring shunt and bus voltages. Its 100 Mbps bandwidth supports fast ADC conversion clocking without timing bottlenecks, and the reinforced barrier allows a single device to meet system isolation targets. Low emissions prevent coupling into sensitive analog rails on the isolated side.
Recommended
Recommended Products Summary
Engineering reference data for ISO7742QFDBQRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO7742QDBQRQ1 | ISO7742QDBQQ1 | ISO7741FQDBQRQ1 | Si8442BB-B-IS1 |
|---|---|---|---|---|---|
| Package | 16-SSOP (DBQ), 3.90 mm | 16-SSOP (DBQ) - same | 16-SSOP (DBQ) - same | 16-SSOP (DBQ) - same | SOIC-16 - similar but not identical footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Skyworks Solutions |
| Isolation Rating | 3000 Vrms (DBQ) | 3000 Vrms | 3000 Vrms | 3000 Vrms | 2500 Vrms |
| Channel Configuration | 2/2 (4 channels) | 2/2 | 2/2 | 3/1 | 2/2 |
| Max Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
| CMTI | 85 kV/us | 85 kV/us | 85 kV/us | 85 kV/us | [DATA_NEEDED] |
| AEC-Q100 Automotive Grade | Yes (Q1) | Yes | Yes | Yes | No (standard grade) |
| Enable Pins | Yes | Yes | Yes | Yes | [DATA_NEEDED] |
Key Differentiators
- Automotive AEC-Q100 qualification (vs ISO7742DBQR (industrial grade))
- 85 kV/us CMTI at reinforced isolation (vs Si8442BB-B-IS1)
- 2/2 bidirectional channel split in one package (vs ISO7741FQDBQRQ1)
Design Notes
Maintain creepage and clearance across the isolation barrier per reinforced isolation requirements for the DBQ package: keep the primary-side and secondary-side grounds fully separated with a physical slot under the barrier where possible. Do not route high-speed signals under the isolator spanning both sides. Refer to the TI ISO774x-Q1 datasheet layout section for recommended barrier spacing.
Decouple both VCC1 and VCC2 with 0.1 uF ceramic capacitors placed within 2 mm of the supply pins. If the isolated-side supply is generated by an isolated DC-DC module (e.g., UCC25800-Q1 transformer driver), add local bulk capacitance to handle 100 Mbps switching transient currents.
Use the enable pins for tri-stating outputs during startup and multi-master operation, but do not leave them floating - tie to a defined logic level through a pull-up/pull-down resistor. Series resistors of 22-33 ohms on outputs reduce ringing on long board traces while preserving timing margin at high data rates.
Verify the channel direction (2/2) before layout: ISO7740 (4/0), ISO7741 (3/1), and ISO7742 (2/2) share package pinout but route signals differently. Substituting the wrong direction variant will cross-connect signals. Also confirm the exact MPN suffix - the 'F' in ISO7742QFDBQRQ1 should be validated against TI ordering nomenclature before production BOM release.
Compliance Information
AEC-Q100 automotive qualification indicated by Q1 suffix per TI product page. RoHS/REACH status to be confirmed on TI product page or datasheet.
