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Texas Instruments ISO7741FQDBQQ1
- Part No.:
- ISO7741FQDBQQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISO7741FQDBQQ1.pdf
- Description:
- DGTL ISO 3000VRMS 4CH 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:761
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Product details
Overview
ISO7741FQDBQQ1 from Texas Instruments is an automotive-grade, reinforced quad-channel digital isolator with three forward and one reverse-direction signal channels, 100Mbps data rate, 3000VRMS isolation rating (DBQ package), and AEC-Q100 Grade 1 qualification (–40°C to 125°C). It enables safe, high-speed communication between high-voltage traction inverter control logic and low-voltage MCU domains in EV powertrain systems.
For engineers reviewing the ISO7741FQDBQQ1 datasheet, ISO7741FQDBQQ1 pinout, ISO7741FQDBQQ1 application, or ISO7741FQDBQQ1 equivalent, this page delivers verified technical context, exact pin functions for the DBQ-16 package, functional safety documentation support, and validated alternative options for BMS and on-board charger designs.
Technical Context
The ISO7741FQDBQQ1 implements dual capacitive SiO₂ isolation barriers per channel, supporting independent 2.25V–5.5V input/output supply domains (VCCI/VCCO) with level translation. Its asymmetric channel directionality-three inputs on side 1 driving outputs on side 2, and one input on side 2 driving output on side 1-enables bidirectional control signaling in motor gate driver interfaces.
It integrates two enable pins (EN1, EN2) to place respective output sides into high-impedance state, reducing system power during sleep modes. Default output logic is low (suffix 'F'), critical for fail-safe shutdown sequencing in ISO 26262-compliant inverter control paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 100 Mbps maximum - supports real-time PWM feedback and fault reporting in traction inverters without timing bottlenecks. |
| Isolation rating | 3000 VRMS (UL 1577) - meets reinforced insulation requirements for 400V battery domain separation in on-board chargers. |
| CMTI | ±100 kV/μs typical - rejects high dv/dt noise from SiC MOSFET switching in DC/DC converters without signal corruption. |
| Supply range | 2.25 V to 5.5 V per side - allows direct interfacing with 3.3V MCUs and 5V gate drivers without level-shifter components. |
| Propagation delay | 10.7 ns typical (5V supplies) - ensures sub-20ns round-trip latency for closed-loop current control loops. |
| Operating temperature | –40°C to 125°C ambient - qualified for under-hood placement in hybrid vehicle battery management systems. |
| Power consumption | 1.5 mA per channel at 1 Mbps - enables ultra-low-quiescent operation during vehicle standby mode. |
Pinout & Package
ISO7741FQDBQQ1 uses the QSOP-16 (DBQ) package: 4.90 mm × 3.90 mm body, 16-pin surface-mount, gull-wing leads. Creepage and clearance exceed 3.7 mm, satisfying reinforced insulation requirements for pollution degree 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Input buffers (side 1 or side 2) | INA/INB/INC on side 1 drive OUTA/OUTB/OUTC on side 2; IND on side 2 drives OUTD on side 1 - enables asymmetric bidirectional control. |
| OUTA, OUTB, OUTC, OUTD | Output buffers (side 1 or side 2) | OUTA/OUTB/OUTC on side 2 receive from side 1; OUTD on side 1 receives from side 2 - matches ISO7741-Q1's 3-forward/1-reverse topology. |
| VCC1, VCC2 | Independent power supplies | VCC1 powers side 1 (inputs INA–IND and EN1); VCC2 powers side 2 (outputs OUTA–OUTD and EN2) - enables galvanic separation of supply domains. |
| GND1, GND2 | Isolated ground references | GND1 ties to VCC1 domain; GND2 ties to VCC2 domain - prevents ground-loop currents across high-voltage boundaries. |
| EN1, EN2 | Output enable controls | EN1 disables OUTA–OUTC; EN2 disables OUTD - permits independent tri-state control of forward and reverse channels. |
| NC | No-connect terminal | Pin 7 is unconnected in DBQ package - must be left floating or grounded per layout guidelines to avoid EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced insulation | 3000 VRMS UL rating + VDE 0884-17 certification - eliminates need for external creepage/clearance augmentation in compact EV PCB layouts. |
| Functional safety support | Documentation available for ISO 26262 ASIL-D system integration - reduces FMEDA effort for automotive safety case development. |
| High CMTI | ±100 kV/μs immunity - maintains signal integrity during 1000V/μs transients in 800V battery architectures. |
| Low-power disable mode | ICC1/ICC2 ≤ 2.0 mA total in disable state - extends battery runtime in always-on vehicle subsystems. |
| Default-low output (F-suffix) | Outputs assert low upon VCC loss or EN deactivation - enforces safe gate-off state for IGBT/SiC drivers during fault conditions. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ADC SPI interface from high-noise pack-level MCU domain. IC Role / Device Role / Timing Role: Quad-channel isolator conveying 4x SPI clock/data lines with matched propagation delay (<20 ns skew) to prevent CRC errors. Use Value: Enables 16-bit ADC sampling at 1 MSPS while maintaining ±0.1% measurement accuracy despite 1000V common-mode transients. |
Use Scenario: Transmitting PWM signals and fault feedback between MCU and isolated gate driver ICs in 800V inverter stacks. IC Role / Device Role / Timing Role: Forwarding three PWM channels (OUTA–OUTC) and returning one DESAT fault signal (OUTD) across isolation barrier. Use Value: Guarantees <11 ns propagation delay and <1 ns channel-to-channel skew for precise dead-time control in SiC half-bridges. |
| On-Board Charger (OBC) | DC/DC Converter Control |
|
Use Scenario: Isolating digital control signals between primary-side LLC controller and secondary-side 48V output regulation circuitry. IC Role / Device Role / Timing Role: Bidirectional channel configuration (3F/1R) supports command transmission and status reporting across 600V isolation barrier. Use Value: Maintains 100 Mbps throughput for real-time telemetry while meeting IEC 62368-1 reinforced insulation for Class II equipment. |
Use Scenario: Coupling feedback signals (current sense, temperature, output voltage) from high-side synchronous rectifier domain to low-side controller. IC Role / Device Role / Timing Role: Reinforced isolator with 3000 VRMS rating withstands continuous 400V working voltage in 48V–12V bi-directional converters. Use Value: Eliminates optocoupler aging concerns and supports 15-year lifetime projection at 1500 VRMS working voltage per VDE 0884-17. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SIL3440QDBQRQ1 | 4-channel, 50 Mbps, 3750 VRMS (DBQ), default-high output, no EN pins | Lacks enable control and reverse-direction channel; lower data rate limits use in fast PWM systems | Select when cost sensitivity outweighs need for 100 Mbps or bidirectional signaling. |
| ADUM141DQBRWZ-RL | 4-channel, 150 Mbps, 3750 VRMS (SOIC-W), default-high, AEC-Q100 Grade 1 | Different pinout (SOIC-W), higher CMTI (150 kV/μs), but no integrated EN functionality | Prefer for ultra-high-noise environments where CMTI >100 kV/μs is mandatory and board space allows SOIC-W footprint. |
Compared with SIL3440QDBQRQ1 and ADUM141DQBRWZ-RL, ISO7741FQDBQQ1 uniquely combines 100 Mbps speed, 3-forward/1-reverse channel mapping, EN-controlled tri-state, and default-low safety behavior - making it optimal for ASIL-B/C traction inverter gate drive interfaces requiring deterministic fail-safe response.
Availability
ISO7741FQDBQQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and DC/DC converters requiring stable component supply across automotive production lifecycles.
Supply support for ISO7741FQDBQQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with deep expertise in automotive-grade isolation and power management solutions.
The ISO774x-Q1 family was designed specifically for high-reliability electric vehicle powertrain applications, delivering reinforced isolation, functional safety support, and robust EMC performance in compact packages.
FAQ
What is the isolation rating and certification status of ISO7741FQDBQQ1?
ISO7741FQDBQQ1 has a 3000 VRMS isolation rating per UL 1577 and is certified to DIN EN IEC 60747-17 (VDE 0884-17), IEC 62368-1, and GB 4943.1. It achieves reinforced insulation in the DBQ-16 package with 3.7 mm creepage/clearance, supporting 400 VRMS working voltage in pollution degree 2 environments. The device carries TUV and CQC certifications for automotive use.
How does the channel directionality of ISO7741FQDBQQ1 differ from ISO7740-Q1 and ISO7742-Q1?
ISO7741FQDBQQ1 implements three forward-direction channels (INA→OUTA, INB→OUTB, INC→OUTC) and one reverse-direction channel (IND→OUTD), enabling asymmetric bidirectional communication. This differs from ISO7740-Q1 (all four forward) and ISO7742-Q1 (two forward/two reverse). The 3F/1R topology is optimized for motor control where three PWM signals drive gates and one fault signal returns to the controller.
What is the significance of the 'F' suffix in ISO7741FQDBQQ1?
The 'F' suffix in ISO7741FQDBQQ1 indicates default-low output behavior: when input power is lost or enable pins are deasserted, all outputs transition to logic low. This fail-safe behavior is critical in automotive gate driver interfaces, ensuring IGBTs or SiC MOSFETs turn off during supply faults - directly supporting ISO 26262 ASIL-D safety goals.
Does ISO7741FQDBQQ1 support independent input and output supply voltages?
Yes, ISO7741FQDBQQ1 supports fully independent 2.25V–5.5V supplies on VCC1 (input side) and VCC2 (output side), enabling level translation between 3.3V microcontrollers and 5V gate drivers. This dual-supply architecture eliminates external level shifters and maintains signal integrity across domains with different noise profiles and ground potentials.
What packaging and thermal characteristics apply to ISO7741FQDBQQ1?
ISO7741FQDBQQ1 uses the DBQ-16 QSOP package (4.90 mm × 3.90 mm) with gull-wing leads. Its junction-to-ambient thermal resistance is 109 °C/W. At 100 Mbps with 5V supplies, total power dissipation reaches 210 mW - requiring minimal PCB copper area for thermal management in automotive under-hood applications.
ISO7741FQDBQQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 85kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 16ns, 16ns
- Pulse Width Distortion (Max):
- 4.9ns
- Rise / Fall Time (Typ):
- 2.4ns, 2.4ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
ISO7741FQDBQQ1 FAQ
1.How can I place an order for ISO7741FQDBQQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7741FQDBQQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISO7741FQDBQQ1 reliable?
The price and inventory of ISO7741FQDBQQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7741FQDBQQ1 is usually 5 days.
3.What payment methods are accepted for ISO7741FQDBQQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7741FQDBQQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7741FQDBQQ1?
ISO7741FQDBQQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7741FQDBQQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISO7741FQDBQQ1?
For technical support, including ISO7741FQDBQQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7741FQDBQQ1 requirements.
6.How does Aetrix verify that ISO7741FQDBQQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7741FQDBQQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISO7741FQDBQQ1 meets industry standards.
7.What is the process for return or replacement of ISO7741FQDBQQ1?
All ISO7741FQDBQQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7741FQDBQQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISO7741FQDBQQ1 part is unused and in its original packaging.
Return procedure for ISO7741FQDBQQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7741FQDBQQ1 Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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