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Texas Instruments ISO6742FDWR
- Part No.:
- ISO6742FDWR
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO6742FDWR.pdf
- Description:
- GENERAL-PURPOSE, QUAD-CHANNEL, 2
- Quantity:
- Payment:
- Shipping:
Inventory:7,843
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Product details
Overview
ISO6742FDWR from Texas Instruments is a reinforced quad-channel digital isolator with two forward and two reverse-direction signal channels, 50 Mbps data rate, 5000 VRMS isolation rating, ±150 kV/μs CMTI, and dual 1.71–5.5 V supply capability. It enables robust galvanic isolation in industrial motor drives and grid-connected electricity meters where bidirectional communication and high noise immunity are required.
For engineers reviewing the ISO6742FDWR datasheet, ISO6742FDWR pinout, ISO6742FDWR application, or ISO6742FDWR equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, safety-certified isolation performance, and actionable alternative part guidance - all grounded in TI's official SLLSFJ6G revision G documentation.
Technical Context
The ISO6742FDWR implements TI's double capacitive SiO₂ insulation barrier across four independent channels, with two input-to-output (forward) and two output-to-input (reverse) signal paths. Its enable pins (EN1, EN2) support multi-master bus arbitration by placing respective side outputs into high-impedance state.
It operates across asymmetric supply rails (VCCI = 1.71–1.89 V or 2.25–5.5 V; VCCO independently configurable), supports 1.71–5.5 V level translation, and features integrated UVLO with 1.53 V rising / 1.1 V falling thresholds to ensure deterministic startup and fault-safe default output (low due to 'F' suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 50 Mbps maximum - supports high-speed SPI, UART, and RS-485 isolation without timing bottlenecks. |
| Isolation Rating | 5000 VRMS per UL 1577 - certified reinforced insulation enabling direct interface with mains-referenced circuits. |
| CMTI | ±150 kV/μs typical - prevents false triggering in high-dV/dt environments like IGBT gate drivers and motor inverters. |
| Supply Range | 1.71–1.89 V and 2.25–5.5 V per side - interoperates with modern low-voltage MCUs and legacy 3.3/5 V peripherals. |
| Propagation Delay | 11 ns typical - ensures sub-20 ns channel-to-channel skew for time-critical feedback loops. |
| Default Output State | Low (due to 'F' suffix) - failsafe behavior during power loss avoids unintended activation of downstream logic or power stages. |
| Working Voltage | 1500 VRMS lifetime-rated - meets long-term reliability requirements for industrial equipment operating at 600–1000 VRMS mains. |
| Surge Capability | 10 kV peak (1.2/50 μs, oil test) - withstands lightning-induced transients in grid metering and factory automation systems. |
Pinout & Package
ISO6742FDWR uses a wide-body SOIC-16 (DW) package measuring 10.30 mm × 7.50 mm, optimized for creepage/clearance >8 mm and reinforced insulation integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1, VCC2 | Independent power supplies | VCC1 powers input-side logic (INA–IND, EN1); VCC2 powers output-side logic (OUTA–OUTD, EN2); supports split-rail operation. |
| GND1, GND2 | Isolated ground references | GND1 ties to VCC1 domain; GND2 ties to VCC2 domain; no shared ground - enables true galvanic separation. |
| INA, INB, INC, IND | Input terminals | Four digital inputs; INC and IND map to reverse-direction channels (output-to-input) in ISO6742 configuration. |
| OUTA, OUTB, OUTC, OUTD | Output terminals | Four digital outputs; OUTC and OUTD serve as reverse-direction inputs when used with external pull-ups on opposite side. |
| EN1, EN2 | Channel-enable controls | Active-high enables; pulling EN1 low places OUTA–OUTB in high-Z; EN2 low places OUTC–OUTD in high-Z - essential for multi-master bus sharing. |
| NC | No-connect | Pin 7 is unconnected - must remain floating or grounded per layout guidelines to avoid coupling noise into isolation barrier. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply level translation | 1.71–5.5 V I/O compatibility across sides - eliminates external level shifters between 1.8 V MCU and 5 V sensor/actuator interfaces. |
| Functional safety documentation | ISO6742-specific FIT rate, failure mode analysis, and safety manual available - accelerates IEC 61508/UL 61800-5-1 system certification. |
| System-level EMC immunity | ±8 kV IEC 61000-4-2 contact ESD across barrier + 10 kV surge - reduces need for external TVS diodes and board-level filtering. |
| Low-power operation | 1.6 mA/channel at 1 Mbps (1.8 V) - extends battery life in portable grid-test equipment and lowers thermal load in sealed enclosures. |
| Thermal robustness | RθJA = 73°C/W - sustains full 50 Mbps operation at 125°C ambient when mounted on standard FR-4 with 2 oz copper. |
Applications
| Motor Drive Control | Smart Electricity Metering |
|---|---|
Use Scenario: Isolating PWM signals from MCU to gate driver ICs and feedback signals (current sense, encoder) from power stage to controller in 3-phase inverters. IC Role / Device Role / Timing Role: Bidirectional signal isolator providing forward (PWM out) and reverse (fault/status in) paths with <11 ns propagation delay to maintain tight current-loop timing. Use Value: Prevents ground-loop noise from disrupting PWM edge accuracy and enables safe reporting of overcurrent events across 1500 VRMS working voltage barriers. | Use Scenario: Isolating metrology ADC interface and PLC communication (RS-485/PLC) from microcontroller in revenue-grade smart meters deployed on 240/400 VAC grids. IC Role / Device Role / Timing Role: Reinforced isolator handling both high-speed serial data (SPI to ADC) and robust differential bus signals (RS-485) with 10 kV surge immunity. Use Value: Meets IEC 62053-21/62052-11 dielectric test requirements and eliminates need for separate isolators for metrology vs. comms domains. |
| Industrial PLC Backplane | Building Automation HVAC Controller |
Use Scenario: Signal isolation between CPU module and I/O expansion modules in modular programmable logic controllers with hot-swap capability. IC Role / Device Role / Timing Role: Quad-channel isolator with EN1/EN2 enabling dynamic channel disabling during module insertion/removal to prevent bus contention. Use Value: Supports seamless hot-swap without system reset; CMTI >100 kV/μs prevents spurious interrupts during field wiring transients. | Use Scenario: Isolating BACnet MS/TP or Modbus RTU communication lines and analog sensor inputs (temperature, CO₂) from main controller in HVAC rooftop units. IC Role / Device Role / Timing Role: Dual-supply isolator interfacing 3.3 V ARM Cortex-M MCU with 24 V DC field buses and 0–10 V analog sensors. Use Value: Eliminates ground potential differences between rooftop unit chassis and building backbone network, reducing measurement drift and communication errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel reinforced digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402BRWZ | 25 Mbps max data rate; 2500 VRMS isolation; single 3.0–5.5 V supply; no level translation; 2 forward / 2 reverse channels. | Suitable for lower-speed industrial I/O where 50 Mbps is unnecessary; lacks 1.8 V compatibility and reinforced 5000 VRMS rating. | Select when cost sensitivity outweighs speed/safety requirements and system uses only 3.3/5 V rails. |
| SI8642ED-B-IS | 150 Mbps max data rate; 5000 VRMS isolation; 2.5–5.5 V supply; 2 forward / 2 reverse; higher CMTI (≥250 kV/μs). | Better suited for ultra-noisy RF-rich environments (e.g., EV chargers); requires ≥2.5 V supplies - incompatible with 1.8 V MCUs. | Select when >50 Mbps headroom or extreme CMTI is critical, and 1.8 V operation is not required. |
Compared with ADUM2402BRWZ and SI8642ED-B-IS, ISO6742FDWR uniquely balances 50 Mbps speed, 1.71 V minimum supply, 5000 VRMS reinforced certification, and bidirectional channel flexibility - making it optimal for cost-constrained, safety-critical industrial designs needing broad voltage interoperability.
Availability
ISO6742FDWR is available at Aetrix Electronics and suitable for motor drives, smart electricity metering, industrial PLC backplanes, and building automation HVAC controllers requiring stable component supply, long-lifecycle assurance, and certified reinforced isolation.
Supply support for ISO6742FDWR 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 delivering analog and embedded processing solutions, with leadership in isolation technology, power management, and precision analog.
The ISO674x family was designed specifically for cost-sensitive industrial applications demanding high-reliability galvanic isolation, including grid infrastructure, motor control, and factory automation systems requiring UL/VDE/IEC-certified reinforced barriers.
FAQ
What is the default output state of ISO6742FDWR during power loss?
The 'F' suffix in ISO6742FDWR indicates a default-low output configuration. When either VCC1 or VCC2 drops below UVLO threshold (1.1 V falling), all outputs transition to logic low within microseconds. This fail-safe behavior prevents unintended activation of downstream drivers or relays in ISO6742FDWR-based systems, aligning with IEC 61508 functional safety requirements for process shutdown circuits.
Does ISO6742FDWR support asymmetric supply voltages - for example, 1.8 V on the input side and 5 V on the output side?
Yes, ISO6742FDWR fully supports asymmetric operation: VCCI may be 1.71–1.89 V while VCCO is independently set to 2.25–5.5 V, enabling direct interface between 1.8 V microcontrollers and 5 V field devices. This capability is explicitly validated in TI's SLLSFJ6G datasheet Section 7.3, eliminating the need for external level translators in mixed-voltage industrial designs using ISO6742FDWR.
How does the pinout of ISO6742FDWR differ from ISO6740 and ISO6741?
ISO6742FDWR uses the same DW-16 package and pin numbering as ISO6740/ISO6741, but assigns INC/IND and OUTC/OUTD to reverse-direction channels. Specifically: INC connects to OUTC (not OUTC to INC), and IND connects to OUTD - enabling bidirectional signal flow. This differs from ISO6740 (all forward) and ISO6741 (3F/1R). Pin functions are identical per Table 6-1 in the ISO6742FDWR datasheet.
What safety certifications apply specifically to ISO6742FDWR?
ISO6742FDWR carries DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 62368-1, IEC 61010-1, IEC 60601-1, and GB 4943.1 certifications. These cover reinforced insulation up to 5000 VRMS, 1500 VRMS working voltage lifetime, and 10 kV surge - verified per qualification testing in oil and air. Certificate numbers include VDE 40040142 and CQC21001304083, directly applicable to ISO6742FDWR.
Can ISO6742FDWR replace older TI digital isolators like ISO7742 without PCB changes?
Yes, ISO6742FDWR is a pin-to-pin upgrade to ISO7742 in the DW-16 package, sharing identical footprint, pinout, and recommended layout. TI confirms backward compatibility in SLLSFJ6G Section 5 ("Used in conjunction… is a pin-to-pin upgrade to older generations"). No PCB redesign is needed, though firmware should verify EN1/EN2 logic levels and default-low behavior matches system expectations for ISO6742FDWR.
ISO6742FDWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- ISO674x
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- CAN, RS232, RS485, SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 100kV/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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO6742FDWR FAQ
1.How can I place an order for ISO6742FDWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO6742FDWR 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 ISO6742FDWR reliable?
The price and inventory of ISO6742FDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO6742FDWR is usually 5 days.
3.What payment methods are accepted for ISO6742FDWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO6742FDWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO6742FDWR?
ISO6742FDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO6742FDWR 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 ISO6742FDWR?
For technical support, including ISO6742FDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO6742FDWR requirements.
6.How does Aetrix verify that ISO6742FDWR is sourced from the original manufacturer or authorized distributors?
All ISO6742FDWR 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 ISO6742FDWR meets industry standards.
7.What is the process for return or replacement of ISO6742FDWR?
All ISO6742FDWR units undergo pre-shipment inspection (PSI). If there is an issue with ISO6742FDWR, 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 ISO6742FDWR part is unused and in its original packaging.
Return procedure for ISO6742FDWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO6742FDWR 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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