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Texas Instruments ISO7741FQDBQRQ1
- Part No.:
- ISO7741FQDBQRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISO7741FQDBQRQ1.pdf
- Description:
- DGTL ISO 3000VRMS 4CH 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,132
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Product details
Overview
ISO7741FQDBQRQ1 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, 5.5 V supply range, and ±100 kV/μs typical CMTI. It provides galvanic isolation between high-voltage powertrain domains and low-voltage controller logic in EV battery management and traction inverter systems.
For engineers reviewing the ISO7741FQDBQRQ1 datasheet, ISO7741FQDBQRQ1 pinout, ISO7741FQDBQRQ1 application, or ISO7741FQDBQRQ1 equivalent, key selection criteria include channel directionality (3F/1R), QSOP-16 package footprint, 3000 VRMS UL isolation rating, AEC-Q100 Grade 1 qualification, and functional safety documentation support for ISO 26262 ASIL-B system integration.
Technical Context
The ISO7741FQDBQRQ1 implements dual capacitive SiO₂ isolation barriers per channel, enabling reinforced insulation certified to DIN EN IEC 60747-17 (VDE 0884-17) and UL 1577. Its architecture supports independent input/output supply rails (VCCI/VCCO) and two enable pins (EN1/EN2) for side-specific output tri-state control.
It operates across 2.25 V–5.5 V supplies with level translation capability, delivers 10.7 ns typical propagation delay at 5 V, and maintains robust EMC performance including ±8 kV IEC 61000-4-2 contact ESD protection across the barrier and low radiated emissions compliant with CISPR 32 Class B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100 Mbps maximum - supports high-speed CAN FD, SPI, and PWM feedback loops in motor control. |
| Isolation Rating | 3000 VRMS (UL 1577) - meets reinforced insulation requirements for QSOP-16 package in 400 VRMS working voltage applications. |
| CMTI | ±100 kV/μs typical - prevents false triggering during fast transients in high-dV/dt environments like traction inverters. |
| 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) - ensures timing-critical gate drive and current sensing signal integrity in real-time control loops. |
| Ambient Temp Range | –40°C to +125°C - qualified for under-hood and battery-pack mounting in electric vehicle power systems. |
| Channel Configuration | 3 forward + 1 reverse - enables bidirectional communication for isolated UART or fault reporting while maintaining primary control flow. |
Pinout & Package
ISO7741FQDBQRQ1 uses the DBQ (QSOP-16) package: 4.90 mm × 3.90 mm body, 16-pin surface-mount, gull-wing leads, 0.65 mm pitch. Pin functions are validated per TI SLLSEU0G Rev. October 2024.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Input channels A–D | CMOS/LVCMOS-compatible inputs; INC and IND assigned to reverse-direction channels per ISO7741-Q1 topology. |
| OUTA, OUTB, OUTC, OUTD | Output channels A–D | Push-pull outputs with 4 mA drive strength; OUTC and OUTD routed to reverse-side logic domain. |
| EN1, EN2 | Output enable controls | Active-high enables; EN1 controls side-1 outputs (OUTA/OUTB), EN2 controls side-2 outputs (OUTC/OUTD). |
| VCC1, VCC2 | Power supplies | VCC1 powers input-side circuitry (INA–IND, EN1); VCC2 powers output-side (OUTA–OUTD, EN2); supports split-rail operation. |
| GND1, GND2 | Ground references | Galvanically isolated grounds - GND1 referenced to VCC1, GND2 to VCC2; no shared ground plane required. |
| NC | No-connect | Pin 7 is unconnected in DBQ package - must be left floating or tied to GND1/GND2 per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | 3000 VRMS UL rating with >30-year lifetime at 400 VRMS working voltage - eliminates need for external creepage/clearance reinforcement in PCB layout. |
| Functional Safety Support | Documentation available for ISO 26262 ASIL-B system design - includes failure mode analysis, FIT rate data, and diagnostic coverage guidance. |
| Low-Power Operation | 1.5 mA per channel typical at 1 Mbps - reduces thermal load in densely packed BMS modules and extends battery runtime in always-on monitoring circuits. |
| High CMTI | ±100 kV/μs typical - suppresses noise-induced errors during 1200 V common-mode transients in 800 V EV architectures. |
| Level Translation | 2.25 V–5.5 V I/O compatibility - allows interfacing 1.8 V/3.3 V MCUs with 5 V gate drivers or ADCs without external translators. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ICs and pack contactor control signals in 400–800 V EV battery packs. IC Role / Device Role / Timing Role: Quad-channel isolator providing independent isolation for voltage sense, temperature, and fault-reporting lines with 3F/1R configuration matching BMS master-slave topology. Use Value: Enables safe, high-accuracy measurement and fast fault response (<100 ns propagation margin) while meeting IEC 62619 and UL 2580 creepage requirements. |
Use Scenario: Isolating PWM gate drive signals and current-sense feedback from MCU to SiC MOSFET half-bridges in 800 V traction inverters. IC Role / Device Role / Timing Role: Forward-direction channels carry gate enable/disable commands; reverse-direction channel returns desaturation fault signals to controller. Use Value: Guarantees <11 ns channel-to-channel skew and ±100 kV/μs CMTI to prevent shoot-through during high-dV/dt switching events. |
| On-Board Charger (OBC) | DC/DC Converter Control |
|
Use Scenario: Isolating digital control signals between primary-side PFC controller and secondary-side LLC resonant controller in bidirectional OBCs. IC Role / Device Role / Timing Role: Three forward channels transmit PWM and status from primary to secondary; reverse channel relays secondary-side overvoltage alerts. Use Value: Supports 100 Mbps operation for precise phase-shifted control loop synchronization and meets reinforced insulation requirements for 1000 V AC mains input. |
Use Scenario: Isolating feedback signals (output voltage, current, temperature) from high-side power stage to low-voltage PMIC in 48 V–12 V automotive DC/DC converters. IC Role / Device Role / Timing Role: Provides galvanic separation for analog sensor interfaces and digital status flags while maintaining sub-15 ns timing accuracy. Use Value: Eliminates ground-loop noise in multi-rail power systems and satisfies CISPR 25 Class 5 emission limits due to low EMI design. |
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 |
|---|---|---|---|
| Si8641BB-B-IS | 4 forward channels only; 5000 VRMS isolation (SOIC-16); 150 Mbps max data rate; no reverse-direction channel. | Requires external logic inversion for bidirectional use cases; better suited for pure unidirectional SPI or I²C isolation. | Select when full 4-channel forward isolation is needed and reverse signaling is handled externally or not required. |
| ADUM241D1BRIZ-RL7 | 3 forward + 1 reverse; 5000 VRMS (SOIC-16); 150 Mbps; higher 15 ns propagation delay; no AEC-Q100 qualification. | Lacks automotive qualification and functional safety documentation; limited to industrial or non-safety-critical designs. | Choose for cost-sensitive industrial applications where AEC-Q100 and ISO 26262 support are not mandatory. |
Compared with Si8641BB-B-IS and ADUM241D1BRIZ-RL7, ISO7741FQDBQRQ1 uniquely combines AEC-Q100 Grade 1 qualification, integrated 3F/1R channel mapping, QSOP-16 footprint for space-constrained automotive modules, and functional safety documentation - making it the only drop-in solution for ASIL-B-compliant EV powertrain subsystems requiring bidirectional isolation.
Availability
ISO7741FQDBQRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and DC/DC converters requiring stable component supply for automotive production programs.
Supply support for ISO7741FQDBQRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management solutions.
The ISO774x-Q1 family was designed specifically for high-reliability automotive powertrain and charging systems, delivering reinforced isolation, functional safety readiness, and AEC-Q100 compliance in compact packages.
FAQ
What does the 'F' suffix in ISO7741FQDBQRQ1 indicate?
The 'F' suffix denotes the default-low output configuration: when input power or signal is lost, all outputs of ISO7741FQDBQRQ1 assert low. This behavior contrasts with non-F variants (e.g., ISO7741QDBQRQ1), which default high. The F variant is selected for fail-safe logic in critical power control paths where deactivation is the safe state.
Which isolation certifications apply to ISO7741FQDBQRQ1 in the DBQ package?
ISO7741FQDBQRQ1 holds UL 1577 (3000 VRMS), DIN EN IEC 60747-17 (VDE 0884-17), IEC 62368-1, IEC 60601-1, and GB 4943.1 certifications. In the DBQ-16 package, its reinforced insulation is rated for 400 VRMS working voltage (pollution degree 2, material group I) per VDE and CSA standards.
How does the 3-forward/1-reverse channel configuration of ISO7741FQDBQRQ1 differ from ISO7740FQDBQRQ1?
ISO7741FQDBQRQ1 has three forward-direction channels (INA→OUTA, INB→OUTB, INC→OUTC) and one reverse-direction channel (IND←OUTD), whereas ISO7740FQDBQRQ1 has all four channels unidirectional (forward only). This makes ISO7741FQDBQRQ1 ideal for applications needing bidirectional communication - such as sending control commands forward and receiving fault reports backward - without adding discrete logic.
Can ISO7741FQDBQRQ1 operate with different supply voltages on input and output sides?
Yes. ISO7741FQDBQRQ1 supports independent VCCI (input-side) and VCCO (output-side) supplies ranging from 2.25 V to 5.5 V each. This enables level translation between 3.3 V microcontrollers and 5 V gate drivers or analog sensors, eliminating external level shifters and simplifying mixed-voltage system design.
What is the significance of the 'Q1' suffix in ISO7741FQDBQRQ1?
The 'Q1' suffix confirms that ISO7741FQDBQRQ1 is qualified per AEC-Q100 Grade 1 standards, with guaranteed operation from –40°C to +125°C ambient temperature and full automotive reliability testing (HTOL, TC, UHAST, etc.). It also indicates functional safety documentation availability for ISO 26262 ASIL-B system development.
ISO7741FQDBQRQ1 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:
- 2500Vrms
- 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
ISO7741FQDBQRQ1 FAQ
1.How can I place an order for ISO7741FQDBQRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7741FQDBQRQ1 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 ISO7741FQDBQRQ1 reliable?
The price and inventory of ISO7741FQDBQRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7741FQDBQRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7741FQDBQRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7741FQDBQRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7741FQDBQRQ1?
ISO7741FQDBQRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7741FQDBQRQ1 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 ISO7741FQDBQRQ1?
For technical support, including ISO7741FQDBQRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7741FQDBQRQ1 requirements.
6.How does Aetrix verify that ISO7741FQDBQRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7741FQDBQRQ1 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 ISO7741FQDBQRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7741FQDBQRQ1?
All ISO7741FQDBQRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7741FQDBQRQ1, 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 ISO7741FQDBQRQ1 part is unused and in its original packaging.
Return procedure for ISO7741FQDBQRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7741FQDBQRQ1 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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