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Texas Instruments ISO7842FDW
- Part No.:
- ISO7842FDW
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7842FDW.pdf
- Description:
- DGTL ISO 5700VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:375
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Product details
Overview
ISO7842FDW from Texas Instruments is a reinforced quad-channel digital isolator with 8000VPK isolation voltage, 100Mbps signaling rate, ±100kV/μs CMTI, and dual 2.25V–5.5V supply domains (VCCI/VCCO). It features two forward and two reverse channels, fail-safe low-default outputs, and enable pins for high-impedance control-used in motor control gate drivers and isolated power supply feedback loops.
For engineers reviewing the ISO7842FDW datasheet, ISO7842FDW pinout, ISO7842FDW application, or ISO7842FDW equivalent, key selection criteria include reinforced isolation certification (DIN EN IEC 60747-17), channel directionality (2F/2R), enable-controlled tri-state capability, and thermal derating behavior across –55°C to 125°C operation.
Technical Context
The ISO7842FDW implements capacitive SiO₂-based isolation with differential data encoding per channel, supporting independent input/output supply domains (VCCI/GNDI and VCCO/GNDO) to enable level translation between 2.25V and 5.5V logic. Its fail-safe output default is low-distinguishing it from the ISO7842DW's high-default behavior-enabling safe shutdown in power-loss scenarios.
Enable pins (EN1, EN2) independently control side-1 and side-2 output buffers, allowing multi-controller bus arbitration and dynamic power reduction. Propagation delay (11ns typ. at 5V) and channel-to-channel skew (2.2ns typ. at 3.3V) are specified across all supply voltages and temperatures, with CMTI maintained at ≥100kV/μs under 1500V common-mode transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 8000VPK reinforced per DIN EN IEC 60747-17 - enables use in 1500VRMS industrial mains-connected systems with single-barrier safety compliance. |
| Signaling Rate | 100Mbps - supports high-speed serial interfaces like isolated SPI, RS-485 transceiver control, and real-time PWM feedback in servo drives. |
| CMTI | ±100kV/μs minimum - ensures robust operation in noisy motor drive inverters where fast dV/dt noise couples across isolation barriers. |
| Supply Range | 2.25V–5.5V on both sides - allows direct interfacing with 3.3V microcontrollers and 5V analog front-ends without external level shifters. |
| Propagation Delay | 11ns typical at 5V - enables sub-10ns timing-critical isolation in digital power control loops and gate driver enable paths. |
| Default Output State | Low on input power loss - provides fail-safe deactivation of downstream power stages (e.g., IGBT gates) during controller brownout. |
| Operating Temperature | –55°C to 125°C - qualified for under-hood automotive, solar inverter, and industrial motor control environments. |
Pinout & Package
ISO7842FDW uses a wide-body 16-pin SOIC (DW) package measuring 10.30mm × 10.30mm (including pins), with 8mm minimum creepage/clearance and >21μm internal insulation thickness for reinforced isolation integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1, VCC2 | Input-side and output-side power supplies | Independent 2.25–5.5V domains allow level translation; VCC1 powers inputs/EN1, VCC2 powers outputs/EN2. |
| GND1, GND2 | Input-side and output-side ground references | Galvanically separated grounds prevent ground-loop currents; each tied only to its respective supply domain. |
| INA–IND | Four digital input terminals | CMOS/LVCMOS-compatible inputs; INA/INB are forward-direction, INC/IND are reverse-direction channels. |
| OUTA–OUTD | Four digital output terminals | Outputs mirror enabled inputs; OUTA/OUTB follow INA/INB (forward), OUTC/OUTD follow INC/IND (reverse). |
| EN1, EN2 | Side-1 and side-2 output enable controls | Active-high enables; pulling low places corresponding outputs in high-impedance-critical for shared-bus arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Certification | DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 62368-1, IEC 60601-1 - eliminates need for system-level creepage/clearance redesign in medical and industrial safety-critical applications. |
| Fail-Safe Low-Default Output | Guaranteed low output state upon VCCI loss - ensures safe turn-off of power semiconductors in motor control and UPS systems during controller failure. |
| Bi-Directional Channel Configuration | Two forward + two reverse channels - enables bidirectional communication (e.g., isolated UART or I²C) without external direction-control logic. |
| Low-Power Operation | 1.7mA/channel at 1Mbps (5V) - reduces thermal load in densely packed inverters and extends battery life in portable medical devices. |
| High ESD/EFT/Surge Immunity | ±6kV HBM, system-level surge immunity up to 12.8kV - meets IEC 61000-4-2/4-4/4-5 requirements without external protection components. |
Applications
| Industrial Motor Control | Solar Inverter Feedback |
|---|---|
Use Scenario: Isolating gate driver signals and current-sense feedback in 3-phase IGBT/SiC inverter stacks. IC Role / Device Role / Timing Role: Quad-channel isolator providing PWM input isolation (forward) and fault/status reporting (reverse) with <11ns propagation delay. Use Value: Enables precise timing alignment between control MCU and power stage while blocking 5kV transient coupling from switching nodes. | Use Scenario: Transmitting DC-link voltage and current measurements from high-side sensing circuitry to isolated ADC/MCU in string inverters. IC Role / Device Role / Timing Role: Reverse-channel isolator delivering analog sensor data via isolated sigma-delta streams with ±100kV/μs noise rejection. Use Value: Maintains measurement accuracy under 10kV/μs dv/dt conditions common in transformerless PV topologies. |
| Medical Imaging Power Supplies | Hybrid Electric Vehicle Battery Management |
Use Scenario: Isolating digital control signals between low-voltage patient-interface logic and high-voltage X-ray generator power supplies. IC Role / Device Role / Timing Role: Reinforced isolator enabling 5.7kVRMS withstand per UL 1577 and 8000VPK peak for IEC 60601-1 Class BF safety compliance. Use Value: Eliminates need for dual-isolation or optocoupler cascades, reducing BOM count and board area in compact CT/MRI power modules. | Use Scenario: Communicating cell voltage monitoring data and pack contactor control commands across isolation barrier in 400–800V EV battery packs. IC Role / Device Role / Timing Role: Fail-safe ISO7842FDW ensures contactor de-energization (low output) during MCU reset or supply dropout. Use Value: Prevents hazardous high-voltage arcing during brownout by guaranteeing safe open-circuit state of main battery relays. |
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 | 5000VRMS isolation (not reinforced), 25Mbps max rate, no enable pins, 100ns propagation delay | Suitable for non-safety-critical industrial comms; insufficient for IEC 62368-1 reinforced requirements | Select only if 8000VPK and 100Mbps are not required; verify system-level creepage for 5000VRMS rating. |
| SI8642ED-B-IS | 5000VRMS isolation, 150Mbps rate, 10ns delay, but lacks fail-safe low-default and VDE-reinforced certification | Used in high-speed data acquisition; not certified for medical or EV battery isolation per IEC 60601-1 or GB 4943.1 | Choose when speed > safety; confirm alternative safety architecture if used in regulated equipment. |
Compared with ADUM2402BRWZ and SI8642ED-B-IS, ISO7842FDW uniquely delivers VDE-reinforced 8000VPK isolation, fail-safe low-default outputs, and dual-supply enable control-making it the only option qualified for medical imaging power supplies and EV battery contactor control without additional safety components.
Availability
ISO7842FDW is available at Aetrix Electronics and suitable for industrial motor control, solar inverter feedback, and hybrid electric vehicle battery management requiring stable component supply and long-term lifecycle support.
Supply support for ISO7842FDW 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 interface solutions for industrial, automotive, and medical markets.
The ISO7842x family is designed for high-noise, safety-critical isolation applications-including motor drives, renewable energy inverters, and medical power systems-where reinforced certification and fail-safe behavior are mandatory.
FAQ
What is the default output state of ISO7842FDW during input power loss?
The ISO7842FDW has a fail-safe low-default output: when VCCI drops below 1.7V, all outputs transition low within 0.2–9μs. This behavior distinguishes ISO7842FDW from ISO7842DW (high-default) and ensures safe deactivation of downstream power stages. The ISO7842FDW specification guarantees this response time across –55°C to 125°C ambient conditions.
Does ISO7842FDW support level translation between different supply voltages?
Yes, ISO7842FDW supports bidirectional level translation between 2.25V and 5.5V logic families via independent VCCI and VCCO supplies. Inputs accept 2.25–5.5V CMOS levels, and outputs drive compatible loads at their respective VCCO voltage-enabling direct interfacing between 3.3V microcontrollers and 5V analog circuits without external translators. This capability is confirmed in Section 5.3 of the ISO7842FDW datasheet.
What safety certifications does ISO7842FDW hold?
ISO7842FDW holds DIN EN IEC 60747-17 (VDE 0884-17) reinforced isolation, UL 1577 (5.7kVRMS for 1 minute), IEC 61010-1, IEC 62368-1, IEC 60601-1, and GB 4943.1 certifications. These are verified through third-party testing (TUV, CSA, CQC) and documented in Section 5.7 of the official TI datasheet. The device is rated for 8000VPK transient isolation voltage and 2000VRMS working voltage.
How does the enable functionality work on ISO7842FDW?
ISO7842FDW features two independent enable pins: EN1 controls side-1 outputs (OUTA, OUTB), and EN2 controls side-2 outputs (OUTC, OUTD). When pulled low, the corresponding outputs enter high-impedance state-allowing multiple controllers to share a bus without contention. EN1/EN2 are active-high, with internal pull-up enabling default operation when left unconnected. This is detailed in Pin Functions Table 4-1 of the ISO7842FDW datasheet.
What is the maximum signaling rate supported by ISO7842FDW?
ISO7842FDW supports up to 100Mbps signaling rate across all supply voltages (2.5V, 3.3V, 5V) and temperature ranges (–55°C to 125°C). This is validated per JEDEC JESD65B test methods and specified in Section 5.3 (Recommended Operating Conditions) and Section 5.15–5.17 (Switching Characteristics) of the ISO7842FDW datasheet. At 100Mbps, typical supply current is 16.6mA at 5V.
ISO7842FDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5700Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 16ns, 16ns
- Pulse Width Distortion (Max):
- 4.1ns
- Rise / Fall Time (Typ):
- 1.7ns, 1.9ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO7842FDW FAQ
1.How can I place an order for ISO7842FDW through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7842FDW 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 ISO7842FDW reliable?
The price and inventory of ISO7842FDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7842FDW is usually 5 days.
3.What payment methods are accepted for ISO7842FDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7842FDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7842FDW?
ISO7842FDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7842FDW 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 ISO7842FDW?
For technical support, including ISO7842FDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7842FDW requirements.
6.How does Aetrix verify that ISO7842FDW is sourced from the original manufacturer or authorized distributors?
All ISO7842FDW 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 ISO7842FDW meets industry standards.
7.What is the process for return or replacement of ISO7842FDW?
All ISO7842FDW units undergo pre-shipment inspection (PSI). If there is an issue with ISO7842FDW, 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 ISO7842FDW part is unused and in its original packaging.
Return procedure for ISO7842FDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7842FDW Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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