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Texas Instruments ISO6731QDWRQ1
- Part No.:
- ISO6731QDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO6731QDWRQ1.pdf
- Description:
- AUTOMOTIVE, GENERAL-PURPOSE, TRI
- Quantity:
- Payment:
- Shipping:
Inventory:3,954
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Product details
Overview
ISO6731QDWRQ1 from Texas Instruments is a triple-channel automotive digital isolator with 50 Mbps data rate, 5000 VRMS isolation rating, ±75 kV/μs CMTI, and AEC-Q100 Grade 1 qualification (–40°C to +125°C). It features two forward and one reverse channels, 1.71–5.5 V dual-supply operation, and default-high output logic for BMS and traction inverter signal isolation.
For engineers reviewing the ISO6731QDWRQ1 datasheet, ISO6731QDWRQ1 pinout, ISO6731QDWRQ1 application, or ISO6731QDWRQ1 equivalent, this page delivers verified functional safety documentation, VDE/UL/IEC-certified insulation specs, SOIC-WB package layout guidance, and automotive-grade EMC performance data per VDA320 and IEC 61000-4-2.
Technical Context
The ISO6731QDWRQ1 implements TI's double capacitive SiO₂ insulation barrier across three independent channels-two unidirectional (A, B) and one bidirectional-capable (C via enable control). Its architecture supports multi-master bus driving via dedicated EN1/EN2 pins that place outputs in high-impedance state.
It operates across dual isolated supplies (VCCI/VCCO), enabling 1.71–5.5 V level translation between domains. Functional safety support includes ISO 26262-ready documentation, while robust EMC is achieved through integrated ESD protection (±8 kV contact), low emissions design, and system-level surge immunity up to 10 kV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 50 Mbps - supports high-speed CAN FD, SPI, and PWM signal isolation in EV powertrain control |
| Isolation Rating | 5000 VRMS - meets reinforced insulation requirements for battery-side isolation in 800-V EV systems |
| CMTI | ±75 kV/μs typical - prevents false triggering during fast-switching transients in traction inverters |
| Supply Range | 1.71–1.89 V & 2.25–5.5 V - enables direct interface with 1.8-V microcontrollers and 3.3/5-V analog/power domains |
| Propagation Delay | 11 ns typical - ensures timing-critical feedback loop integrity in motor control and DC/DC converter regulation |
| Operating Temp | –40°C to +125°C ambient - qualified for under-hood and battery-pack mounting per AEC-Q100 Grade 1 |
| Surge Capability | 10 kV - withstands lightning-induced surges and load-dump transients in automotive wiring harnesses |
Pinout & Package
ISO6731QDWRQ1 uses a 16-pin Wide-SOIC (DW) package measuring 10.30 mm × 7.50 mm, optimized for creepage >8 mm and clearance >8 mm per IEC 60664-1. The double-capacitive SiO₂ barrier separates input (side 1) and output (side 2) domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1, VCC2 | Input/output domain power supplies | Independent 1.71–5.5 V rails enable level-shifting; UVLO thresholds ensure fail-safe startup |
| GND1, GND2 | Input/output domain ground references | Galvanically isolated grounds prevent ground-loop noise coupling between MCU and power stage |
| INA, INB, INC | Digital input signals (side 1) | Accept CMOS/LVCMOS logic; 0.7×VCCI threshold ensures compatibility with 1.8-V to 5-V drivers |
| OUTA, OUTB, OUTC | Digital output signals (side 2) | Drive loads up to ±4 mA at 5 V; default-high state maintains safe logic level during input power loss |
| EN1, EN2 | Output enable controls | Enable high-impedance mode on respective side for multi-master bus arbitration or power sequencing |
| NC (pins 6, 11) | No-connect terminals | Internally unused; must remain unconnected per TI layout guidelines to preserve CMTI performance |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety Documentation | ISO 26262 ASIL-B ready package including FIT rate, failure mode analysis, and diagnostic coverage reports |
| VDA320 Compliance | Fully validated for German automotive OEM isolation requirements including lifetime testing at 1500 VRMS working voltage |
| Dual-Supply Level Translation | 1.71–5.5 V operation on both sides enables seamless interfacing between 1.8-V sensors and 5-V actuator drivers |
| High-EMC Robustness | ±8 kV IEC 61000-4-2 contact discharge protection across barrier and <10 dBμV radiated emissions at 1 GHz |
| Thermal Derating Support | RθJA = 73°C/W with defined safety limiting power (1712 mW) for junction temperature management in sealed enclosures |
Applications
| Battery Management System (BMS) | On-Board Charger (OBC) |
|---|---|
Use Scenario: Isolating cell voltage monitoring ADCs and pack contactor control signals in high-voltage battery stacks. IC Role / Device Role / Timing Role: Triple-channel isolator provides galvanic separation for analog front-end sampling and digital fault signaling with sub-20 ns propagation delay. Use Value: Enables accurate 16-bit cell voltage measurement while preventing high-side switching noise from corrupting MCU inputs. | Use Scenario: Signal isolation between AC-DC PFC controller and DC-DC LLC secondary-side feedback in 11-kW OBCs. IC Role / Device Role / Timing Role: Forward-channel isolation of gate driver PWM and reverse-channel isolation of secondary-side current sense signals. Use Value: Maintains tight voltage regulation accuracy (<±1%) despite 100+ V/ns common-mode transients on transformer windings. |
| Traction Inverter Control | DC/DC Converter Monitoring |
Use Scenario: Isolating ePWM outputs from MCU to SiC gate drivers and capturing DESAT fault signals in 800-V inverter modules. IC Role / Device Role / Timing Role: Two forward channels carry high-speed PWM; third channel returns fast DESAT alerts with <100 ns total latency. Use Value: Prevents shoot-through failures by ensuring gate driver disable occurs within 200 ns of overcurrent detection. | Use Scenario: Isolating CAN bus communication and auxiliary supply monitoring in 48-V/12-V bi-directional DC/DC converters. IC Role / Device Role / Timing Role: Provides reinforced insulation for CAN transceiver I/O and isolated voltage sensing on primary side. Use Value: Meets CISPR 25 Class 5 emissions limits without external filtering, reducing bill-of-materials cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-channel automotive digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SIL3330DWR | 3-channel, 100 Mbps, 3750 VRMS, AEC-Q100 Grade 1, but lacks VDA320 certification and has lower CMTI (±50 kV/μs) | Not approved for German OEM BMS designs requiring VDA320; suitable for non-critical HVAC or lighting control | Select when higher speed is needed and VDA320 compliance is not mandated |
| ADUM3470ARWZ-RL | 4-channel, integrated isolated DC-DC converter, 25 Mbps, 2500 VRMS, no AEC-Q100 qualification | Requires additional external LDO for 1.8-V logic; unsuitable for safety-critical powertrain functions | Choose only for non-automotive industrial applications needing on-chip power transfer |
Compared with SIL3330DWR and ADUM3470ARWZ-RL, ISO6731QDWRQ1 uniquely combines VDA320 validation, 5000 VRMS reinforced insulation, and ±75 kV/μs CMTI-making it the only option qualified for high-voltage battery disconnect supervision and traction inverter gate drive in ASIL-C systems.
Availability
ISO6731QDWRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply across automotive production lifecycles.
Supply support for ISO6731QDWRQ1 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 high-reliability ICs for automotive, industrial, and communications markets.
The ISO6731-Q1 product line delivers AEC-Q100-qualified digital isolators engineered specifically for functional safety-critical EV/HEV powertrain subsystems-including BMS, OBC, and inverter control-with certified insulation and automotive EMC resilience.
FAQ
What is the default output state of ISO6731QDWRQ1 during power loss?
The ISO6731QDWRQ1 has a default-high output configuration. When input-side power (VCCI) drops below the UVLO threshold (1.1–1.41 V), the outputs transition to high within 0.1–0.3 μs. This fail-safe behavior ensures open-circuit conditions in gate driver interfaces and maintains safe states in battery contactor control circuits. The ISO6731QDWRQ1 datasheet specifies this behavior in Section 8.4 "Device Functional Modes" and Figure 7-3.
Does ISO6731QDWRQ1 support level translation between 1.8-V and 5-V logic domains?
Yes, ISO6731QDWRQ1 supports bidirectional level translation across its full supply range: VCCI can be 1.71–1.89 V while VCCO operates at 2.25–5.5 V, or vice versa. Input thresholds scale to 0.7×VCCI, enabling reliable recognition of 1.8-V signals by a 5-V output domain. This capability is validated in Sections 6.3 (Recommended Operating Conditions) and 6.9–6.15 (Electrical Characteristics) of the ISO6731QDWRQ1 datasheet.
What safety certifications does ISO6731QDWRQ1 hold for automotive use?
ISO6731QDWRQ1 holds DIN VDE V 0884-11:2017-01, UL 1577, IEC 62368-1, IEC 61010-1, IEC 60601-1, and pending GB 4943.1-2011 certifications. It is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and meets VDA320 isolation requirements. All certifications are documented in Section 6.7 of the ISO6731QDWRQ1 datasheet, with certificate numbers provided for VDE, UL, and TÜV.
How does ISO6731QDWRQ1 achieve ±75 kV/μs CMTI performance?
ISO6731QDWRQ1 achieves ±75 kV/μs typical common-mode transient immunity through TI's proprietary double capacitive SiO₂ insulation barrier, optimized layout techniques minimizing parasitic coupling, and internal noise-suppression circuitry. This performance is measured per IEC 61000-4-4 with 1200 V common-mode step and verified across all supply voltages (1.8 V to 5 V) in Section 6.9–6.15 of the ISO6731QDWRQ1 datasheet.
Can ISO6731QDWRQ1 be used in multi-master bus configurations?
Yes, ISO6731QDWRQ1 supports multi-master bus operation via dedicated EN1 and EN2 pins (pins 7 and 10), which place side-1 and side-2 outputs into high-impedance state when driven low. This allows multiple devices to share a common bus without contention. The enable functionality is detailed in Table 5-1 (Pin Functions) and Section 8.3 of the ISO6731QDWRQ1 datasheet, with timing parameters specified in Section 6.17.
ISO6731QDWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- CAN
- Isolated Power:
- No
- Number of Channels:
- 3
- Inputs - Side 1/Side 2:
- 2/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 50Mbps
- Propagation Delay tpLH / tpHL (Max):
- 18ns, 18ns
- Pulse Width Distortion (Max):
- 7ns
- Rise / Fall Time (Typ):
- 2.6ns, 2.6ns
- 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-SOIC
ISO6731QDWRQ1 FAQ
1.How can I place an order for ISO6731QDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO6731QDWRQ1 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 ISO6731QDWRQ1 reliable?
The price and inventory of ISO6731QDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO6731QDWRQ1 is usually 5 days.
3.What payment methods are accepted for ISO6731QDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO6731QDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO6731QDWRQ1?
ISO6731QDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO6731QDWRQ1 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 ISO6731QDWRQ1?
For technical support, including ISO6731QDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO6731QDWRQ1 requirements.
6.How does Aetrix verify that ISO6731QDWRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO6731QDWRQ1 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 ISO6731QDWRQ1 meets industry standards.
7.What is the process for return or replacement of ISO6731QDWRQ1?
All ISO6731QDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO6731QDWRQ1, 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 ISO6731QDWRQ1 part is unused and in its original packaging.
Return procedure for ISO6731QDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO6731QDWRQ1 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
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ISO7721DWVR
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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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