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Texas Instruments ISO7741TBDWRQ1
- Part No.:
- ISO7741TBDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7741TBDWRQ1.pdf
- Description:
- AUTOMOTIVE, QUAD-CHANNEL, REINFO
- Quantity:
- Payment:
- Shipping:
Inventory:2,035
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Product details
Overview
ISO7741TBDWRQ1 from Texas Instruments is a Grade 1 automotive-qualified, reinforced quad-channel digital isolator with integrated transformer driver, delivering 100Mbps data rate, 5000VRMS isolation rating, and ±150kV/μs CMTI. It features default-high output logic, 2.25V–5.5V dual-supply operation, and drives center-tapped transformers for isolated power in EV traction inverters.
For engineers reviewing the ISO7741TBDWRQ1 datasheet, ISO7741TBDWRQ1 pinout, ISO7741TBDWRQ1 application, or ISO7741TBDWRQ1 equivalent, this page provides verified functional safety context (ISO 26262 support), transformer driver specifications (1.75A current limit, 160kHz oscillator), and automotive-grade thermal performance (–40°C to 125°C).
Technical Context
The ISO7741TBDWRQ1 integrates four independent SiO₂-based digital isolation channels with double-capacitive barriers and a dedicated low-noise push-pull transformer driver stage. Its architecture separates signal isolation (INA–IND to OUTA–OUTD) from power conversion (D1/D2 outputs driving external center-tapped transformers), enabling simultaneous high-speed data transfer and isolated DC/DC generation.
It implements spread spectrum clocking and slew-rate control to suppress EMI, includes break-before-make logic and soft-start for transformer inrush mitigation, and embeds thermal shutdown (154°C trip), under-voltage lockout (2.25V rising threshold), and 1.75A current limiting on D1/D2 outputs - all validated for AEC-Q100 Grade 1 operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100Mbps maximum - supports high-speed CAN FD, SPI, and PWM feedback in motor control loops without timing bottlenecks. |
| Isolation Rating | 5000VRMS per UL 1577 - enables reinforced insulation in 400V–800V battery systems without additional barrier components. |
| CMTI | ±150kV/μs typical - ensures robust noise immunity during fast-switching IGBT/SiC gate drive transients in traction inverters. |
| Transformer Driver Output | 0.7A max per D1/D2 at 5V - directly drives small-form-factor center-tapped transformers for <5W isolated bias rails. |
| Oscillator Frequency | 160kHz (TA variant) - optimized for low EMI in space-constrained BMS and OBC applications where spectral emissions must meet CISPR 25 Class 5. |
| Supply Range | 2.25V–5.5V on both sides - allows interoperability with 3.3V microcontrollers and 5V analog sensing circuits across isolation boundary. |
| Ambient Temp Range | –40°C to +125°C - qualified for under-hood and powertrain locations per AEC-Q100 Grade 1 requirements. |
Pinout & Package
DW package (SOIC-16, 10.30mm × 10.30mm footprint, 10.30mm × 7.50mm body), surface-mount, RoHS-compliant, with creepage/clearance >8mm and internal DTI >17μm per VDE 0884-17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Digital input signals (side 1) | CMOS/LVCMOS-compatible inputs accepting 0.3×VCCI to 0.7×VCCI thresholds; default-high behavior when input lost. |
| OUTA, OUTB, OUTC, OUTD | Digital output signals (side 2) | Push-pull outputs with VOH ≥4.8V @5V (IOH = –4mA), VOL ≤0.4V @5V (IOL = 4mA); rail-to-rail compatible with MCU GPIOs. |
| D1, D2 | Transformer driver outputs | Open-drain N-MOSFET outputs capable of 0.7A continuous, 2.4A peak; require short PCB traces to minimize ringing and EMI. |
| VCC1, VCC2 | Isolated power supplies | Independent 2.25V–5.5V supplies for primary (logic/control) and secondary (isolated side) domains; UVLO active at 2.25V rising. |
| GND1, GND2 | Reference grounds | Separate ground planes required; no internal connection - defines isolation barrier integrity and noise rejection capability. |
| NC | No connect | Pin 14 is unconnected internally; must be left floating or tied to GND2 per layout guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated transformer driver | Eliminates need for external gate drivers and discrete MOSFETs, reducing BOM count and PCB area in isolated DC/DC designs. |
| Spread spectrum clocking | Reduces peak EMI by >10dB in 150kHz–1MHz band, easing compliance with CISPR 25 Class 5 in automotive modules. |
| Soft-start circuitry | Prevents inrush current into large output capacitors during power-up, avoiding transformer saturation and supply droop. |
| Break-before-make logic | Guarantees dead-time between D1/D2 switching transitions, preventing shoot-through and transformer core saturation. |
| Functional safety documentation | Includes FIT rate, failure mode analysis, and diagnostic coverage data aligned with ISO 26262 ASIL B system integration. |
Applications
| EV Traction Inverter | Battery Management System (BMS) |
|---|---|
Use Scenario: Isolating gate drive signals and current/voltage feedback from 800V DC-link to MCU in dual-motor EV architectures. IC Role / Device Role / Timing Role: Quad-channel isolator provides independent PWM channel isolation (A/B) and ADC/data acquisition isolation (C/D), while D1/D2 drive auxiliary isolated bias supply. Use Value: Enables single-chip isolation + bias generation, reducing component count by 3+ devices versus discrete isolator + controller + MOSFET solution. |
Use Scenario: Monitoring cell voltages and temperatures across 96-cell series stack with isolated communication to master controller. IC Role / Device Role / Timing Role: Digital isolator channels transmit SPI commands and status data; transformer driver powers isolated ADC and multiplexer supply rails. Use Value: 160kHz oscillator minimizes conducted emissions near sensitive analog measurement bands, improving voltage measurement accuracy. |
| On-Board Charger (OBC) | Automotive HVAC Control Module |
Use Scenario: Isolating digital control signals between AC/DC PFC stage and DC/DC LLC stage in bidirectional OBCs. IC Role / Device Role / Timing Role: Provides reinforced isolation for gate drivers (channels A/B), communication (C), and auxiliary supply enable (D), with D1/D2 powering isolated gate driver ICs. Use Value: 5000VRMS rating meets reinforced insulation requirements for 1000V AC mains interfaces without external creepage enhancement. |
Use Scenario: Isolating LIN bus interface and PWM fan control signals from high-current heater relay drivers in cabin climate systems. IC Role / Device Role / Timing Role: Channels A/B isolate LIN transceiver I/O; C/D isolate PWM outputs; D1/D2 generate isolated 5V rail for relay driver ICs. Use Value: –40°C to 125°C operation ensures reliable startup and continuous function in extreme under-dash thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel digital isolator with integrated transformer driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7742TBDWRQ1 | Two independent 2-channel isolation banks (vs. 4-channel unified bank in ISO7741TBDWRQ1); identical transformer driver specs. | Better suited for split-domain systems requiring separate isolation groups (e.g., separate MCU and sensor clusters). | Select ISO7742TBDWRQ1 when channel grouping flexibility or differential signaling across banks is required. |
| ISO7741FBDWRQ1 | Default-low output logic (suffix 'F') vs. default-high in ISO7741TBDWRQ1; otherwise identical pinout, specs, and driver capability. | Required where fail-safe state mandates low output on loss of input (e.g., disable-on-fault motor control). | Choose ISO7741FBDWRQ1 only if system-level safety architecture requires active-low default behavior. |
Compared with ISO7742TBDWRQ1 and ISO7741FBDWRQ1, the ISO7741TBDWRQ1 offers unified quad-channel timing alignment and default-high fail-safe behavior - critical for synchronized PWM gate drive in traction inverters where consistent channel startup state prevents shoot-through.
Availability
ISO7741TBDWRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply with automotive-grade qualification and long-term production continuity.
Supply support for ISO7741TBDWRQ1 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 expertise in isolation technology and functional safety certification.
The ISO774xT-Q1 family is designed specifically for high-reliability automotive powertrain and charging systems, integrating signal isolation and isolated power generation to simplify architecture and reduce system-level EMI in EV/HEV applications.
FAQ
What is the oscillator frequency of the ISO7741TBDWRQ1?
The ISO7741TBDWRQ1 uses a 160kHz internal oscillator for its integrated transformer driver. This frequency is fixed for the 'TA' variant (denoted by 'A' in the suffix), optimized to minimize electromagnetic interference in automotive applications such as battery management systems and on-board chargers where spectral emissions must comply with CISPR 25 Class 5 limits. The ISO7741TBDWRQ1 does not support external frequency adjustment.
Does the ISO7741TBDWRQ1 support 3.3V logic on both sides?
Yes, the ISO7741TBDWRQ1 supports 3.3V operation on both VCC1 and VCC2 supplies. At 3.3V, it delivers VOH ≥3.2V (IOH = –2mA) and VOL ≤0.3V (IOL = 2mA), with input thresholds scaling to 0.3×VCCI and 0.7×VCCI. Its 2.25V–5.5V wide supply range enables direct interfacing with 3.3V microcontrollers and sensors without level-shifting circuitry on either side of the isolation barrier.
How does the ISO7741TBDWRQ1 handle fault conditions on the transformer driver outputs?
The ISO7741TBDWRQ1 incorporates multiple hardware-based protections for D1/D2 outputs: current limiting (1.75A typical), thermal shutdown (154°C trip), under-voltage lockout (2.25V rising threshold), and break-before-make logic. These features operate autonomously without firmware intervention, ensuring safe shutdown during overcurrent, overtemperature, or supply brownout events - critical for automotive functional safety compliance in ISO7741TBDWRQ1 deployments.
What is the creepage and clearance distance of the ISO7741TBDWRQ1 DW package?
The ISO7741TBDWRQ1 in the DW (SOIC-16) package provides >8mm external creepage and clearance distances between terminals, meeting reinforced insulation requirements per IEC 60664-1 and VDE 0884-17. These values are validated for pollution degree 2 and climatic category 55/125/21, supporting use in harsh automotive environments where contamination and humidity are present.
Is the ISO7741TBDWRQ1 pin-compatible with other ISO774xT-Q1 variants?
Yes, the ISO7741TBDWRQ1 shares identical pinout and package (DW, SOIC-16) with all ISO7741x and ISO7742x variants including ISO7741FBDWRQ1, ISO7742TBDWRQ1, and ISO7741TB variants. Differences are limited to internal oscillator frequency (TA vs. TB), default output state (T vs. F), and channel grouping (ISO7741 vs. ISO7742), allowing drop-in replacement where those parameters align with system requirements.
ISO7741TBDWRQ1 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:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 17ns, 17ns
- Pulse Width Distortion (Max):
- 6.2ns
- 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
ISO7741TBDWRQ1 FAQ
1.How can I place an order for ISO7741TBDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7741TBDWRQ1 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 ISO7741TBDWRQ1 reliable?
The price and inventory of ISO7741TBDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7741TBDWRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7741TBDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7741TBDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7741TBDWRQ1?
ISO7741TBDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7741TBDWRQ1 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 ISO7741TBDWRQ1?
For technical support, including ISO7741TBDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7741TBDWRQ1 requirements.
6.How does Aetrix verify that ISO7741TBDWRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7741TBDWRQ1 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 ISO7741TBDWRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7741TBDWRQ1?
All ISO7741TBDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7741TBDWRQ1, 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 ISO7741TBDWRQ1 part is unused and in its original packaging.
Return procedure for ISO7741TBDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7741TBDWRQ1 Tags
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