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Texas Instruments ISO7742FQDBQQ1
- Part No.:
- ISO7742FQDBQQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISO7742FQDBQQ1.pdf
- Description:
- DGTL ISO 3000VRMS 4CH 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:996
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Product details
Overview
ISO7742FQDBQQ1 from Texas Instruments is an automotive-grade, reinforced quad-channel digital isolator with two forward and two reverse-direction signal paths, 100 Mbps data rate, ±100 kV/μs CMTI, and 3000 VRMS isolation rating in the DBQ-16 QSOP package. It operates across 2.25 V to 5.5 V supplies and supports level translation between domains, targeting high-reliability EV powertrain subsystems.
For engineers reviewing the ISO7742FQDBQQ1 datasheet, ISO7742FQDBQQ1 pinout, ISO7742FQDBQQ1 application, or ISO7742FQDBQQ1 equivalent, this page delivers verified functional safety documentation support, AEC-Q100 Grade 1 qualification (-40°C to 125°C), UL/VDE/IEC safety certifications, and precise channel directionality for BMS and inverter control interface design.
Technical Context
The ISO7742FQDBQQ1 implements dual capacitive SiO₂ isolation barriers per channel, enabling reinforced insulation with 12.8 kV surge capability and >30-year lifetime at 1500 VRMS working voltage. Its architecture includes independent enable pins (EN1, EN2) for side-specific output tri-state control and default-low output behavior due to the "F" suffix.
It supports asymmetric supply operation (VCCI ≠ VCCO), delivers 10.7 ns typical propagation delay at 5 V, and maintains robust EMC performance with ±8 kV IEC 61000-4-2 contact ESD protection across the barrier and low emissions compliant with automotive CISPR 25 Class 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100 Mbps maximum - enables high-speed SPI, CAN FD, and PWM feedback links in traction inverters. |
| Isolation Rating | 3000 VRMS (UL 1577) - certified for reinforced insulation in DBQ-16 package, supporting 400 VRMS working voltage per IEC 62368-1. |
| CMTI | ±100 kV/μs typical - ensures reliable operation in high-dV/dt motor drive environments without false triggering. |
| Supply Range | 2.25 V to 5.5 V - allows direct interfacing with 3.3 V microcontrollers and 5 V gate drivers without level shifters. |
| Propagation Delay | 10.7 ns typical (5 V) - supports tight-timing control loops in real-time motor control applications. |
| Power Consumption | 13.4 mA typical at 100 Mbps (3.3 V) - reduces thermal load in densely packed BMS modules. |
| Ambient Temp Range | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and battery-pack mounting. |
Pinout & Package
ISO7742FQDBQQ1 uses the DBQ-16 QSOP package (4.90 mm × 3.90 mm), optimized for space-constrained automotive PCB layouts while maintaining reinforced insulation clearance and creepage (>3.7 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Input channels A–D | Logic inputs on side-1 (VCCI/GND1); INC and IND are reverse-direction inputs per ISO7742 functional definition. |
| OUTA, OUTB, OUTC, OUTD | Output channels A–D | Logic outputs on side-2 (VCC2/GNDO); OUTC and OUTD are reverse-direction outputs, enabling bidirectional data flow across isolation barrier. |
| EN1, EN2 | Output enable controls | Active-high enables for side-1 and side-2 outputs respectively; drives outputs to high-impedance when low - critical for multi-controller bus arbitration. |
| VCC1, VCC2 | Isolated power supplies | Independent 2.25–5.5 V supplies for input and output sides - supports level translation and fault containment. |
| GND1, GND2 | Isolated grounds | Galvanically separated reference planes preventing ground-loop noise coupling between MCU and power stage domains. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | 3000 VRMS (UL), 400 VRMS working voltage (IEC 62368-1), certified to DIN EN IEC 60747-17 (VDE 0884-17) - meets ASIL-D system-level safety requirements. |
| Functional Safety Support | Documentation available for ISO7742-Q1 per ISO 26262 - enables systematic capability analysis for automotive safety mechanisms. |
| Default-Low Output | "F" suffix indicates all outputs default to logic low during power loss or input failure - prevents unintended gate driver activation in motor control. |
| High CMTI | ±100 kV/μs typical - suppresses noise-induced errors in high-power switching nodes (e.g., SiC/GaN inverter half-bridges). |
| Low Power at Speed | 13.4 mA total supply current at 100 Mbps (3.3 V) - enables high-bandwidth monitoring without excessive thermal dissipation in sealed enclosures. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
Use Scenario: Isolating cell voltage monitoring ADC interfaces and pack contactor control signals in high-voltage battery stacks up to 1000 VDC. IC Role / Device Role / Timing Role: Quad-channel isolator providing galvanic separation for analog front-end SPI buses and digital I/Os between MCU and isolated sensing domain. Use Value: Enables safe, accurate measurement of individual cell voltages while preventing ground-loop interference and meeting ASIL-B diagnostic coverage targets. |
Use Scenario: Transmitting PWM gate signals and fault feedback between MCU and isolated gate drivers in 800-V electric vehicle inverters. IC Role / Device Role / Timing Role: Two forward channels carry PWM commands; two reverse channels return DESAT and UVLO status - synchronized via shared timing budget. Use Value: 10.7 ns propagation delay and 100 kV/μs CMTI ensure precise edge alignment and immunity to 10-kV/μs switching transients in SiC-based power stages. |
| On-Board Charger (OBC) | DC/DC Converter Control |
Use Scenario: Isolating communication between primary-side controller and secondary-side LLC resonant controller in bidirectional OBC topologies. IC Role / Device Role / Timing Role: Bidirectional data path using two forward/reverse channels for command transmission and telemetry reporting across isolation barrier. Use Value: Level translation (2.5 V ↔ 5 V) and 100 Mbps throughput support fast closed-loop regulation of variable-frequency resonant converters. |
Use Scenario: Interfacing isolated microcontroller with synchronous rectifier drivers and voltage-mode controllers in high-efficiency 48 V–12 V DC/DC modules. IC Role / Device Role / Timing Role: Forward channels deliver duty-cycle commands; reverse channels report output overvoltage and thermal warnings. Use Value: Low quiescent current (0.9 mA typical in disable mode) extends standby efficiency, critical for always-on vehicle networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel reinforced digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8642BB-B-IS | 3750 VRMS isolation (UL), 150 Mbps, 2.5–5.5 V supply, no integrated enable pins | Lacks EN1/EN2 for side-specific tri-state; lower CMTI (75 kV/μs) | Preferred where higher speed justifies reduced noise immunity and simplified enable logic. |
| ADUM2402BRWZ-RL | 2500 VRMS (UL), 25 Mbps, 3.0–5.5 V, default-high output, SOIC-16W | Lower speed and isolation rating; not AEC-Q100 qualified | Suitable for non-automotive industrial systems requiring cost-optimized isolation without functional safety certification. |
Compared with Si8642BB-B-IS and ADUM2402BRWZ-RL, ISO7742FQDBQQ1 uniquely combines AEC-Q100 Grade 1 qualification, 3000 VRMS reinforced isolation, default-low fail-safe behavior, and dual enable pins - making it the only option qualified for ASIL-C/D powertrain control loops requiring deterministic fault response.
Availability
ISO7742FQDBQQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and DC/DC converters requiring stable component supply in automotive production programs.
Supply support for ISO7742FQDBQQ1 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 focused on analog and embedded processing technologies, serving automotive, industrial, and communications markets with high-reliability components.
The ISO774x-Q1 family was designed specifically for automotive powertrain and energy storage systems, delivering reinforced isolation with functional safety documentation and AEC-Q100 qualification to meet ASIL-D system requirements.
FAQ
What does the "F" suffix in ISO7742FQDBQQ1 indicate?
The "F" suffix in ISO7742FQDBQQ1 specifies default-low output behavior: when input power is lost or signals are invalid, all four outputs (OUTA–OUTD) assert logic low. This fail-safe state prevents unintended activation of downstream gate drivers or relays in safety-critical automotive subsystems like traction inverters and BMS contactors.
Which package does ISO7742FQDBQQ1 use, and what are its key mechanical features?
ISO7742FQDBQQ1 uses the DBQ-16 QSOP package (4.90 mm × 3.90 mm), featuring reinforced insulation with ≥3.7 mm creepage and clearance, 17 μm minimum distance through insulation (DTI), and material group I per IEC 60664-1. Its compact footprint supports high-density placement in space-constrained automotive modules such as OBC control boards.
How does ISO7742FQDBQQ1 support functional safety compliance in automotive designs?
ISO7742FQDBQQ1 is documented as functional safety-capable per ISO 26262, with safety manuals and FIT data available from Texas Instruments. Its AEC-Q100 Grade 1 qualification, 12.8 kV surge immunity, and reinforced insulation (3000 VRMS UL, 400 VRMS working voltage) enable systematic and random hardware analysis for ASIL-B/C systems in EV powertrain applications.
Can ISO7742FQDBQQ1 operate with different supply voltages on input and output sides?
Yes, ISO7742FQDBQQ1 supports independent 2.25 V to 5.5 V supplies on VCC1 (input side) and VCC2 (output side), enabling seamless level translation between 3.3 V microcontrollers and 5 V gate drivers. This eliminates external level shifters and simplifies power domain partitioning in isolated motor control architectures.
What is the channel configuration of ISO7742FQDBQQ1, and how does it differ from ISO7740-Q1 and ISO7741-Q1?
ISO7742FQDBQQ1 has two forward-direction channels (INA→OUTA, INB→OUTB) and two reverse-direction channels (INC←OUTC, IND←OUTD), enabling bidirectional data exchange across the isolation barrier. In contrast, ISO7740-Q1 has all four channels unidirectional forward, and ISO7741-Q1 has three forward and one reverse - making ISO7742FQDBQQ1 optimal for full-duplex control interfaces like isolated SPI or UART links.
ISO7742FQDBQQ1 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:
- 2/2
- 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
ISO7742FQDBQQ1 FAQ
1.How can I place an order for ISO7742FQDBQQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7742FQDBQQ1 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 ISO7742FQDBQQ1 reliable?
The price and inventory of ISO7742FQDBQQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7742FQDBQQ1 is usually 5 days.
3.What payment methods are accepted for ISO7742FQDBQQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7742FQDBQQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7742FQDBQQ1?
ISO7742FQDBQQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7742FQDBQQ1 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 ISO7742FQDBQQ1?
For technical support, including ISO7742FQDBQQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7742FQDBQQ1 requirements.
6.How does Aetrix verify that ISO7742FQDBQQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7742FQDBQQ1 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 ISO7742FQDBQQ1 meets industry standards.
7.What is the process for return or replacement of ISO7742FQDBQQ1?
All ISO7742FQDBQQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7742FQDBQQ1, 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 ISO7742FQDBQQ1 part is unused and in its original packaging.
Return procedure for ISO7742FQDBQQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7742FQDBQQ1 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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