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Texas Instruments ISO7740FQDWRQ1
- Part No.:
- ISO7740FQDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7740FQDWRQ1.pdf
- Description:
- DGTL ISO 5000VRMS 4CH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,128
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Product details
Overview
ISO7740FQDWRQ1 from Texas Instruments is an automotive-grade, reinforced quad-channel digital isolator with unidirectional channel configuration (all four channels forward), 100 Mbps data rate, 5700 VRMS isolation rating (DWW package), and operation from –40°C to 125°C ambient. It provides galvanic signal isolation in high-noise EV powertrain subsystems such as battery management systems and traction inverters.
For engineers reviewing the ISO7740FQDWRQ1 datasheet, ISO7740FQDWRQ1 pinout, ISO7740FQDWRQ1 application, or ISO7740FQDWRQ1 equivalent, key selection criteria include reinforced insulation certification (VDE 0884-17, UL 1577), ±100 kV/μs CMTI, 2.25–5.5 V dual-supply level translation, and default-low output logic behavior due to the "F" suffix.
Technical Context
The ISO7740FQDWRQ1 implements a double capacitive SiO₂ insulation barrier per channel, enabling reinforced isolation compliance across IEC, UL, and VDE safety standards. Its architecture supports independent input/output supplies (VCCI/VCCO) and includes two enable pins (EN1, EN2) for side-specific high-impedance control-critical for multi-controller bus arbitration in automotive domain controllers.
Unlike bidirectional variants (ISO7741-Q1, ISO7742-Q1), the ISO7740FQDWRQ1 features all-forward channel directionality and default-low output state on power loss or signal fault-ensuring fail-safe behavior in safety-critical motor control interfaces where low-level assertion disables gate drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100 Mbps maximum - supports high-speed CAN FD, SPI, and PWM feedback loops in real-time EV control systems |
| Isolation Rating | 5700 VRMS (UL 1577) - enables safe interface between 800-V battery domains and 12-V MCU domains |
| CMTI | ±100 kV/μs typical - rejects fast transients from IGBT switching noise in traction inverters |
| Supply Range | 2.25 V to 5.5 V per side - allows direct interfacing with 3.3 V MCUs and 5 V analog front-ends without level shifters |
| Propagation Delay | 10.7 ns typical (5 V) - ensures sub-20 ns round-trip latency for closed-loop motor current sampling |
| Default Output State | Low (due to "F" suffix) - guarantees safe shutdown of downstream power stages during brownout or reset |
| Operating Temperature | –40°C to 125°C ambient - qualified for under-hood placement in HEV power electronics modules |
Pinout & Package
ISO7740FQDWRQ1 uses the DWW-16 (SOIC-16, extra-wide body) package: 10.30 mm × 14.0 mm, 1.27 mm pitch, creepage/clearance >14.5 mm, reinforced insulation per VDE 0884-17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Input signals (side 1) | Accept CMOS/LVCMOS logic from MCU or sensor interface; tolerate 0.3×VCCI to 0.7×VCCI hysteresis |
| OUTA, OUTB, OUTC, OUTD | Output signals (side 2) | Drive isolated gate drivers or ADCs; default-low on fault; support 4 mA sink/source at 5 V |
| VCC1, VCC2 | Independent power supplies | VCC1 powers inputs and EN1; VCC2 powers outputs and EN2 - enables 3.3 V/5 V domain bridging |
| GND1, GND2 | Isolated ground references | Physically separate ground planes required; no shared return path across isolation barrier |
| EN1, EN2 | Output enable controls | Active-high enables outputs on respective side; low forces high-impedance - essential for bus sharing in multi-MCU architectures |
| NC | No-connect pin | Pin 7 in DWW package - must remain unconnected; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Certification | DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 62368-1 - meets ASIL-D functional safety requirements for EV powertrain |
| Surge Immunity | 12.8 kV peak surge (oil test) - withstands lightning-induced transients in onboard chargers and DC/DC converters |
| EMC Robustness | ±8 kV IEC 61000-4-2 contact ESD across barrier - eliminates external TVS diodes in compact BMS designs |
| Low-Power Operation | 1.5 mA per channel at 1 Mbps (5 V) - reduces thermal load in sealed power module enclosures |
| Level Translation | 2.25–5.5 V bidirectional supply range - enables interoperability between legacy 5 V sensors and modern 3.3 V SoCs |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
Use Scenario: Isolating cell voltage monitoring ICs (e.g., BQ796xx) from MCU in 400–800 V battery packs. IC Role / Device Role / Timing Role: Signal isolator for analog front-end SPI communication and fault reporting lines. Use Value: Prevents ground loop currents from corrupting 1-mV precision cell measurements while meeting ASIL-B diagnostic coverage. |
Use Scenario: Transmitting PWM gate drive signals from inverter MCU to isolated gate drivers (e.g., UCC5870-Q1). IC Role / Device Role / Timing Role: High-speed digital isolator for critical timing paths with <20 ns total propagation delay budget. Use Value: Enables 20 kHz+ switching frequencies in SiC inverters by maintaining signal integrity amid 50 kV/μs dv/dt noise. |
| On-Board Charger (OBC) | DC/DC Converter Control |
Use Scenario: Isolating digital control signals between primary-side controller (SiC half-bridge) and secondary-side LLC controller. IC Role / Device Role / Timing Role: Bidirectional data isolator for feedback loop synchronization and fault signaling across 1.5 kVRMS working voltage. Use Value: Supports galvanic separation required for Class II medical-grade OBCs while maintaining <100 ns jitter in phase-shift modulation. |
Use Scenario: Isolating voltage/current sense feedback and enable signals between 48 V/12 V DC/DC converter stages. IC Role / Device Role / Timing Role: Unidirectional isolator for analog-to-digital converter interface and soft-start sequencing. Use Value: Eliminates measurement offset drift caused by common-mode currents in high-current (>200 A) buck converters. |
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 |
|---|---|---|---|
| ISO7740QDWRQ1 | Same pinout and specs, but default output high (no "F" suffix) | Used where fail-safe requires active-high enable (e.g., precharge contactor control) | Select ISO7740QDWRQ1 when system logic asserts high to activate safety functions |
| ADUM2400ARWZ-RL | 4-channel, 25 Mbps, 2500 VRMS, non-automotive grade, no AEC-Q100 qualification | Limited to industrial or infotainment subsystems-not suitable for powertrain safety islands | Consider ADUM2400ARWZ-RL only for non-safety-critical 12 V domain interfaces with lower bandwidth needs |
Compared with ISO7740QDWRQ1, the ISO7740FQDWRQ1 provides guaranteed low-state fail-safety, while ADUM2400ARWZ-RL lacks automotive qualification and half the isolation rating-making it unsuitable for ASIL-C/D powertrain zones despite identical pin count.
Availability
ISO7740FQDWRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply across extended automotive production lifecycles.
Supply support for ISO7740FQDWRQ1 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 electronics, with decades of safety-certified isolation technology development.
The ISO774x-Q1 family was designed specifically for ASIL-B/C automotive powertrain and charging systems, delivering reinforced isolation, high CMTI, and AEC-Q100 Grade 1 operation in harsh under-hood environments.
FAQ
What does the "F" suffix in ISO7740FQDWRQ1 indicate?
The "F" suffix denotes default-low output behavior: when input power or signal is lost, all four outputs (OUTA–OUTD) drive low. This fail-safe state prevents unintended activation of downstream power devices in ISO7740FQDWRQ1-based motor control or battery disconnect circuits, aligning with ISO 26262 functional safety requirements for ASIL-D systems.
Which package does ISO7740FQDWRQ1 use, and why does it matter?
ISO7740FQDWRQ1 uses the DWW-16 (extra-wide SOIC) package with 10.30 mm × 14.0 mm footprint and >14.5 mm creepage/clearance. This package delivers the highest 5700 VRMS isolation rating in the ISO774x-Q1 family-essential for 800 V EV architectures where reinforced insulation must withstand sustained 1500 VRMS working voltage per DIN EN IEC 60747-17.
Can ISO7740FQDWRQ1 replace ISO7740QDWRQ1 in an existing design?
ISO7740FQDWRQ1 is pin-compatible with ISO7740QDWRQ1 but differs in default output state (low vs. high). Replacement requires verifying that downstream logic interprets low as safe-e.g., gate driver enable lines or fault latches. No PCB changes are needed, but firmware or safety validation must confirm fail-safe behavior remains intact for ISO7740FQDWRQ1.
How does ISO7740FQDWRQ1 support functional safety certification?
ISO7740FQDWRQ1 is functional safety-capable with documentation (FIT rate, failure mode analysis, safety manual) supporting ISO 26262 ASIL-D system design. Its VDE 0884-17 certification, 12.8 kV surge immunity, and 100 kV/μs CMTI directly address random hardware fault mitigation requirements for powertrain safety mechanisms in ISO7740FQDWRQ1 implementations.
What is the role of EN1 and EN2 pins on ISO7740FQDWRQ1?
EN1 controls outputs on side 1 (OUTA–OUTD), and EN2 controls outputs on side 2 (not applicable for ISO7740FQDWRQ1's unidirectional configuration). When pulled low, EN1 places all outputs in high-impedance state-enabling bus sharing among multiple controllers in domain ECUs. This feature is used in ISO7740FQDWRQ1-based multi-MCU architectures to prevent signal contention during diagnostics or redundancy handover.
ISO7740FQDWRQ1 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:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 40kV/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-SOIC
ISO7740FQDWRQ1 FAQ
1.How can I place an order for ISO7740FQDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7740FQDWRQ1 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 ISO7740FQDWRQ1 reliable?
The price and inventory of ISO7740FQDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7740FQDWRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7740FQDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7740FQDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7740FQDWRQ1?
ISO7740FQDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7740FQDWRQ1 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 ISO7740FQDWRQ1?
For technical support, including ISO7740FQDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7740FQDWRQ1 requirements.
6.How does Aetrix verify that ISO7740FQDWRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7740FQDWRQ1 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 ISO7740FQDWRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7740FQDWRQ1?
All ISO7740FQDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7740FQDWRQ1, 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 ISO7740FQDWRQ1 part is unused and in its original packaging.
Return procedure for ISO7740FQDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7740FQDWRQ1 Tags
-
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.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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