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Texas Instruments ISO7741QDBQRQ1
- Part No.:
- ISO7741QDBQRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISO7741QDBQRQ1.pdf
- Description:
- DGTL ISO 3000VRMS 4CH 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,189
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Product details
Overview
ISO7741QDBQRQ1 from Texas Instruments is an automotive-grade, reinforced quad-channel digital isolator with three forward and one reverse-direction signal paths, 100 Mbps data rate, 3000 VRMS isolation rating (DBQ package), and ±100 kV/μs CMTI. It operates across 2.25–5.5 V supplies and supports level translation between input and output sides, targeting high-reliability EV powertrain interfaces.
For engineers reviewing the ISO7741QDBQRQ1 datasheet, ISO7741QDBQRQ1 pinout, ISO7741QDBQRQ1 application, or ISO7741QDBQRQ1 equivalent, key selection criteria include channel directionality (3F/1R), QSOP-16 package footprint, AEC-Q100 Grade 1 qualification (–40°C to 125°C), functional safety documentation support, and reinforced insulation per VDE 0884-17 and UL 1577.
Technical Context
The ISO7741QDBQRQ1 implements dual capacitive SiO₂ isolation barriers per channel, enabling reinforced insulation with >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-output logic (high for non-F suffix variants).
It delivers robust EMC performance: ±8 kV IEC 61000-4-2 contact ESD across the barrier, system-level surge immunity up to 12.8 kV, and low emissions compliant with CISPR 22 Class B. Propagation delay is 10.7 ns typical at 5 V, with supply current as low as 1.5 mA per channel at 1 Mbps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 100 Mbps maximum - supports high-speed CAN FD, SPI, and PWM signal isolation in traction inverters. |
| Isolation rating | 3000 VRMS (UL 1577) - meets reinforced insulation requirements for battery management systems 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 - enables direct interface with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Propagation delay | 10.7 ns typical (5 V) - preserves timing integrity in real-time motor control loops with sub-100 ns dead-time constraints. |
| Ambient temperature | –40°C to 125°C (Grade 1) - qualified for under-hood and power module locations in EV/HEV applications. |
| Package | QSOP-16 (DBQ) - 4.9 mm × 3.9 mm footprint with 0.65 mm pitch, optimized for space-constrained BMS PCB layouts. |
Pinout & Package
ISO7741QDBQRQ1 uses the DBQ (QSOP-16) package: 4.90 mm × 3.90 mm body, 0.65 mm lead pitch, gull-wing leads. Pin functions are validated per TI SLLSEU0G Rev. October 2024.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1, VCC2 | Input-side and output-side power supplies | Independent 2.25–5.5 V rails enable bidirectional level translation and fault-domain separation. |
| GND1, GND2 | Input-side and output-side ground references | Galvanically isolated grounds prevent ground-loop currents and noise coupling between domains. |
| INA, INB, INC, IND | Input channels A–D | CMOS/LVCMOS-compatible inputs; INC and IND assigned to reverse-direction channels in ISO7741-Q1 configuration. |
| OUTA, OUTB, OUTC, OUTD | Output channels A–D | Outputs reflect input states with 3F/1R directionality; OUTC and OUTD swapped vs. ISO7740-Q1 to implement reverse path. |
| EN1, EN2 | Side-1 and side-2 output enable controls | Active-high enables; pulling low places respective outputs in high-impedance state for multi-controller bus sharing. |
| NC | No-connect pin | Pin 7 is unconnected in DBQ package - must be left floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced insulation | Qualified to VDE 0884-17 and UL 1577 with 3000 VRMS rating - eliminates need for external creepage/clearance reinforcement in BMS designs. |
| Functional safety support | Documentation available for ISO7741-Q1 per ISO 26262 ASIL-B decomposition - reduces FMEDA effort for automotive safety-critical subsystems. |
| High CMTI | ±100 kV/μs typical - maintains signal integrity during 12.8 kV surge events in inverter gate-drive feedback paths. |
| Low-power operation | 1.5 mA per channel at 1 Mbps - extends runtime in always-on battery monitoring circuits without thermal derating. |
| Configurable directionality | 3 forward + 1 reverse channel mapping - enables single-device isolation of SPI clock/MOSI/MISO plus dedicated fault-reporting line in OBC controllers. |
Applications
| Battery Management System (BMS) | On-Board Charger (OBC) |
|---|---|
Use Scenario: Isolating cell voltage monitor ADC serial interface and pack-level fault signals between high-voltage battery stack and low-voltage MCU domain. IC Role / Device Role / Timing Role: Quad-channel isolator providing 3F/1R signal paths for SPI data, clock, and reverse-direction overvoltage alert. Use Value: Enables safe, high-speed communication across 500+ V potential difference while meeting ASIL-D diagnostic coverage requirements via integrated enable control. |
Use Scenario: Isolating digital control signals between PFC controller and DC-link voltage sensing circuitry in 11 kW OBC modules. IC Role / Device Role / Timing Role: Reinforced isolator handling PWM feedback, current sense enable, and reverse-direction thermal shutdown signal. Use Value: Maintains 100 Mbps timing margin for 100 kHz PFC switching cycles and withstands 12.8 kV surges induced by AC line transients. |
| Traction Inverter Control | DC/DC Converter Monitoring |
Use Scenario: Isolating gate driver status feedback and phase current sensor outputs in 800 V electric vehicle inverters. IC Role / Device Role / Timing Role: High-CMTI isolator transmitting IGBT desaturation fault (reverse path) alongside three forward PWM command channels. Use Value: Prevents false trips during 10 kV/μs common-mode transients from SiC switching, ensuring functional safety compliance. |
Use Scenario: Isolating telemetry data (input voltage, output current, temperature) from 400 V–12 V DC/DC converter to vehicle network controller. IC Role / Device Role / Timing Role: Level-translating isolator interfacing 5 V sensor outputs to 3.3 V CAN transceiver domain with AEC-Q100 reliability. Use Value: Eliminates external level shifters and reduces BOM count while maintaining 125°C ambient operation in engine bay mounting. |
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 |
|---|---|---|---|
| ISO7741FDWQRQ1 | DW package (SOIC-WB, 10.3 × 7.5 mm); 5000 VRMS isolation; higher RθJA (83.4°C/W) | Better suited for board-level creepage requirements ≥8 mm; requires larger PCB area than DBQ | Select when higher isolation rating and thermal margin outweigh space constraints in OBC mainboard layouts. |
| SI8641ED-B-IS | Silicon Labs device; 5000 VRMS (SOIC-16); 150 Mbps; different pinout (no EN1/EN2); no AEC-Q100 Grade 1 certification | Lacks automotive qualification and configurable enable pins; not suitable for ASIL-B systems | Consider only for non-automotive industrial inverters where AEC-Q100 and functional safety are not required. |
Compared with ISO7741FDWQRQ1, ISO7741QDBQRQ1 offers 37% smaller footprint and lower profile but trades 2000 VRMS isolation margin; versus SI8641ED-B-IS, it provides certified automotive operation and side-specific enable control essential for BMS fault containment.
Availability
ISO7741QDBQRQ1 is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, traction inverters, and DC/DC converters requiring stable component supply across automotive production lifecycles.
Supply support for ISO7741QDBQRQ1 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, embedded processing, and automotive ICs, with decades of expertise in isolation technology and functional safety design.
The ISO774x-Q1 family targets high-reliability automotive power electronics, delivering reinforced isolation for EV/HEV systems including BMS, OBC, and traction inverters under AEC-Q100 Grade 1 conditions.
FAQ
What is the isolation rating and certification basis for ISO7741QDBQRQ1?
ISO7741QDBQRQ1 has a 3000 VRMS isolation rating per UL 1577 and is certified to DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation. It carries CSA, UL, CQC, and TUV certifications covering IEC 62368-1, IEC 60601-1, and GB 4943.1 standards, with 12.8 kV surge capability and 400 VRMS working voltage in DBQ package.
How does the 3-forward/1-reverse channel configuration of ISO7741QDBQRQ1 differ from ISO7740QDBQRQ1?
ISO7741QDBQRQ1 routes three channels (INA→OUTA, INB→OUTB, INC→OUTC) in forward direction and one channel (IND→OUTD) in reverse direction, whereas ISO7740QDBQRQ1 has all four channels unidirectional. This allows ISO7741QDBQRQ1 to isolate bidirectional signals like SPI MISO and fault alerts without external logic inversion.
What are the supply voltage and level translation capabilities of ISO7741QDBQRQ1?
ISO7741QDBQRQ1 supports independent 2.25 V to 5.5 V supplies on VCC1 and VCC2, enabling true level translation between domains - e.g., 3.3 V MCU I/O to 5 V gate driver logic. Input thresholds scale with VCCI (0.3×/0.7×), and outputs drive full rail-to-rail swing compatible with LVCMOS and CMOS loads.
Does ISO7741QDBQRQ1 support functional safety development for ISO 26262 systems?
Yes - ISO7741QDBQRQ1 is functional safety-capable with documentation available to aid ISO 26262 system design. It supports ASIL-B decomposition in BMS and inverter subsystems, and its failure modes, FIT rate, and diagnostic coverage data are provided in TI's safety manual for the ISO774x-Q1 family.
What is the thermal performance of ISO7741QDBQRQ1 in the DBQ package?
ISO7741QDBQRQ1 in QSOP-16 (DBQ) has a junction-to-ambient thermal resistance (RθJA) of 109°C/W. At 100 Mbps with 5 V supplies, total supply current reaches ~27 mA, resulting in ~150 mW dissipation - well within the 1147 mW safety power limit at 25°C ambient per Section 5.8 of the datasheet.
ISO7741QDBQRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 3000Vrms
- 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
ISO7741QDBQRQ1 FAQ
1.How can I place an order for ISO7741QDBQRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7741QDBQRQ1 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 ISO7741QDBQRQ1 reliable?
The price and inventory of ISO7741QDBQRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7741QDBQRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7741QDBQRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7741QDBQRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7741QDBQRQ1?
ISO7741QDBQRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7741QDBQRQ1 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 ISO7741QDBQRQ1?
For technical support, including ISO7741QDBQRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7741QDBQRQ1 requirements.
6.How does Aetrix verify that ISO7741QDBQRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7741QDBQRQ1 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 ISO7741QDBQRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7741QDBQRQ1?
All ISO7741QDBQRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7741QDBQRQ1, 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 ISO7741QDBQRQ1 part is unused and in its original packaging.
Return procedure for ISO7741QDBQRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7741QDBQRQ1 Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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