ISO7741FQDBQRQ1 - 100Mbps 3/1 Quad Digital Isolator | TI
MPN: ISO7741FQDBQRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.1 | $210.00 |
| 500 | $1.6 | $800.00 |
| 1,000 | $1.3 | $1,300.00 |
Drop-in alternatives for ISO7741FQDBQRQ1 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:
ISO7741FDBQR
β Drop-Inβ In Stock
$1.2 / Unit
View Datasheet βISO7741QDBQRQ1
β Drop-Inπ Reference alternative (not in catalog)
ISO7742FDBQR
β Drop-Inβ In Stock
$2.5 / Unit
View Datasheet βISO7741DBQR
β Drop-Inπ Reference alternative (not in catalog)
ISO7741FQDBQRQ1 Maximum Ratings & Electrical Characteristics
| Channels | 4 (3 forward / 1 reverse) |
| Isolation Rating | 3000 VRMS per UL 1577 |
| Maximum Data Rate | 100 Mbps |
| CMTI | 85 kV/us minimum |
| Supply Voltage Range | 2.25 V to 5.5 V (both sides) |
| Insulation Type | Reinforced (F grade, robust EMC) |
| Package | 16-SSOP (DBQ), 3.90 mm width |
| Operating Temperature | -40C to +125C |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| Default Output | Configurable default-high/default-low options in family |
| Isolation Technology | Capacitive (SiO2) |
| Logic Compatibility | 1.8 V, 2.5 V, 3.3 V, 5 V |
| Mounting Type | Surface Mount |
| Application | General Purpose digital isolation |
| RoHS Status | Compliant |
| Propagation Delay | [DATA_NEEDED: propagation delay] |
ISO7741FQDBQRQ1 Pin Configuration
| Pin 1 | VCC1 β Side-1 supply, 2.25 V to 5.5 V |
| Pin 2 | GND1 β Side-1 ground |
| Pin 3 | A (IN) β Channel A input, side 1 |
| Pin 4 | B (IN) β Channel B input, side 1 |
| Pin 5 | C (IN) β Channel C input, side 1 |
| Pin 6 | D (OUT) β Channel D output, side 1 (reverse channel) |
| Pin 7 | NC β No connect |
| Pin 8 | EN1 β Side-1 enable/default control |
| Pin 9 | EN2 β Side-2 enable/default control |
| Pin 10 | NC β No connect |
| Pin 11 | A (OUT) β Channel A output, side 2 |
| Pin 12 | B (OUT) β Channel B output, side 2 |
| Pin 13 | C (OUT) β Channel C output, side 2 |
| Pin 14 | D (IN) β Channel D input, side 2 |
| Pin 15 | GND2 β Side-2 ground |
| Pin 16 | VCC2 β Side-2 supply, 2.25 V to 5.5 V |
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
ISO7741FQDBQRQ1 is suitable for 6 applications: Isolated CAN Bus Interface, IGBT/SiC Gate Drive Signaling, Battery Management System (BMS) Communications, Isolated RS-485 / Modbus Industrial Nodes, Isolated SPI for ADC/DAC Signal Chains, Solar Inverter and Grid-Tie Isolation.
Isolated CAN Bus Interface
The ISO7741FQDBQRQ1 isolates the MCU-side logic from the CAN transceiver domain, with its 85 kV/us CMTI rejecting ground-shift transients from motor drives sharing the bus. Its three forward channels carry TX, control, and standby signals while the reverse channel returns RX and fault status. The 100 Mbps rate far exceeds 5 Mbps CAN FD needs, leaving timing margin, and 2.25 V-to-5.5 V supplies allow direct 3.3 V MCU interfacing. Place the isolator between the MCU and an isolated transceiver such as ISO1042BQDWVRQ1 for a complete reinforced isolated node in automotive networks.
Recommended
IGBT/SiC Gate Drive Signaling
In traction inverters and onboard chargers, the ISO7741FQDBQRQ1 carries PWM signals across the isolation barrier to gate drivers. The 85 kV/us CMTI withstands the steep dv/dt of SiC switching (often 50-100 V/ns) without data corruption, and the reinforced 3000 VRMS barrier supports functional-safety isolation coordination. Two forward channels carry complementary PWM while the reverse channel returns DESAT/fault feedback at high speed. Pair with UCC21710-Q1 or UCC21520Q-Q1 isolated gate drivers, keeping the isolator grounds tightly decoupled to preserve noise immunity during switching events.
Recommended
Battery Management System (BMS) Communications
BMS pack-to-pack and pack-to-vehicle links need reinforced isolation for hundreds of volts of cell-stack potential. The ISO7741FQDBQRQ1 isolates SPI or UART traffic between the battery monitoring AFE (such as BQ76952Q-Q1 or BQ79616B-Q1 domain) and the vehicle control MCU. Its low supply range supports 3.3 V logic on both sides, and default-output states put the link into a defined safe state during power-up. The 100 Mbps rate supports daisy-chained monitoring stacks, while AEC-Q100 qualification covers the -40C to +125C automotive environment.
Recommended
Isolated RS-485 / Modbus Industrial Nodes
Industrial RS-485 networks span long cables with large ground potential differences; the ISO7741FQDBQRQ1 breaks ground loops between the PLC logic domain and the RS-485 transceiver. Reinforced insulation supports installation-category isolation, 100 Mbps handles fast control signaling, and the robust-EMC F grade tolerates burst and surge environments per IEC 61800-style testing. Use forward channels for DE/RE and TX control, reverse channel for RX. Combine with THVD1500-class transceivers and isolated DC-DC supplies such as UCC25800-Q1 bias converters for a complete isolated node.
Recommended
Isolated SPI for ADC/DAC Signal Chains
Precision data converters in high-voltage domains (motor-phase sensing, solar strings) require isolated SPI with timing margin. The ISO7741FQDBQRQ1's 100 Mbps rate easily supports 20-50 MHz SPI clocks with multi-slot loop delay budget, and the 3/1 configuration carries CS, SCLK, and MOSI forward while returning MISO. Its 2.25 V side supplies match 1.8 V converters such as ADS7067. Low channel-to-channel skew keeps multi-byte transfers coherent; verify total loop delay against your SPI round-trip timing at the target clock rate.
Recommended
Solar Inverter and Grid-Tie Isolation
String inverters isolate the DC input and control logic from grid-referenced circuitry; the ISO7741FQDBQRQ1 provides reinforced signaling for PWM, relay control, and fault feedback across this barrier. The 3000 VRMS DBQ rating supports reinforced insulation coordination for typical 600-1100 V DC systems, and 85 kV/us CMTI rides through common-mode transients from the grid-side bridge. Its low quiescent operation aids standby-power budgets, and default-output states guarantee safe shutdown during auxiliary-supply dips, complementing isolated bias parts such as UCC14130-class converters.
Recommended
Recommended Products Summary
Engineering reference data for ISO7741FQDBQRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO7741FDBQR | ISO7741QDBQRQ1 | ISO7742FDBQR | NCIV9411R2 | Si8442BB-B-IS |
|---|---|---|---|---|---|---|
| Package | 16-SSOP (DBQ) | 16-SSOP (DBQ) - same | 16-SSOP (DBQ) - same | 16-SSOP (DBQ) - same | SOIC-16W - different | 16-SOIC - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | Silicon Labs |
| Channel Configuration | 3/1 | 3/1 | 3/1 | 4/0 | 3/1 | [DATA_NEEDED] |
| Isolation Rating | 3000 VRMS | 3000 VRMS | 3000 VRMS | 3000 VRMS | [DATA_NEEDED] | 2500 VRMS |
| Max Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | [DATA_NEEDED] | [DATA_NEEDED] |
| CMTI | 85 kV/us | 85 kV/us | 85 kV/us | 85 kV/us | [DATA_NEEDED] | [DATA_NEEDED] |
| Automotive AEC-Q100 | Yes (Q1) | No | Yes (Q1) | No | [DATA_NEEDED] | No |
| Insulation Grade | Reinforced (F, robust EMC) | Reinforced (F) | Basic | Reinforced (F) | [DATA_NEEDED] | Basic |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | [DATA_NEEDED] | -40C to +125C |
Key Differentiators
- Reinforced robust-EMC insulation in compact DBQ (vs ISO7741QDBQRQ1)
- Automotive AEC-Q100 qualification (vs ISO7741FDBQR)
- True drop-in family coverage (vs NCIV9411R2)
Design Notes
Decouple each VCC pin with a 0.1 uF ceramic capacitor placed within 2 mm of the pin, plus optional 1 uF bulk per side. Keep the DBQ package's limited creepage/clearance (narrow 3.90 mm body) free of high-voltage planes directly beneath the barrier; add a slot in internal layers crossing the isolation boundary to preserve creepage on multilayer boards.
At 100 Mbps, treat isolator traces as controlled-impedance lines; series-terminate (~22-33 ohm) fast drivers to limit reflections and radiated emissions. Keep the reverse-channel (D) trace separated from PWM forward channels to minimize crosstalk, and account for total loop delay (through-propagation plus isolator delay) when budgeting SPI or PWM dead-time timing.
Do not assume pin compatibility with non-F ISO7741 variants blindly - the F (robust-EMC) family has different default-state behavior and pin functions than some legacy ISO77xx parts; always verify the ISO774x-Q1 datasheet Rev. G pin table. Also note DBQ (3000 VRMS) cannot substitute for DW (5000 VRMS) or DWW (5700 VRMS) designs where higher isolation is specified.
Compliance Information
AEC-Q100 qualified per TI ISO7741-Q1 product page. RoHS/lead-free per standard TI automotive product offering; verify REACH status on TI product page.
