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Texas Instruments ISOW7842DWE
- Part No.:
- ISOW7842DWE
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISOW7842DWE.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:286
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Product details
Overview
ISOW7842DWE from Texas Instruments is a reinforced quad-channel digital isolator with integrated DC-DC converter, delivering 100 Mbps data rate, 5000 VRMS isolation rating, ±100 kV/µs CMTI, and up to 0.65 W isolated output power. It operates across –40°C to +125°C and supports 3.3 V or 5 V isolated supply selection via SEL pin-used in industrial motor control interfaces requiring compact, self-powered galvanic isolation.
For engineers reviewing the ISOW7842DWE datasheet, ISOW7842DWE pinout, ISOW7842DWE application, or ISOW7842DWE equivalent, key selection criteria include channel direction configuration (2 forward / 2 reverse), SEL-controlled VISO output voltage (3.3 V or 5 V), thermal derating at >80°C ambient, safety certification alignment with IEC 62368-1 and IEC 60601-1, and SOIC-WB package creepage/clearance compliance for high-voltage systems.
Technical Context
The ISOW7842DWE implements dual-isolation architecture: capacitive SiO₂ barriers for signal channels and on-chip thin-film polymer transformers for power transfer. Its 2-forward/2-reverse channel mapping (INA/INB → OUTA/OUTB; INC/IND ← OUTC/OUTD) enables bidirectional bus isolation without external level shifters.
Signal integrity is maintained via low propagation delay (13 ns typ at 5 V), tight pulse width distortion (<2 ns), and robust EMC design-including ±8 kV IEC 61000-4-2 contact ESD across the barrier and system-level surge immunity meeting IEC 62368-1 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100 Mbps - supports high-speed RS-485/CAN FD interface isolation without timing bottlenecks. |
| Isolation Rating | 5000 VRMS - certified reinforced insulation per UL 1577 and DIN V VDE V 0884-11 for mains-connected equipment. |
| CMTI | ±100 kV/µs - prevents false triggering in noisy motor drive or grid inverter environments. |
| Output Power | 0.65 W - powers isolated ADCs, gate drivers, or microcontrollers without external DC-DC converters. |
| VISO Options | 3.3 V or 5 V - selected by SEL pin state; enables compatibility with both 3.3 V logic and legacy 5 V peripherals. |
| Propagation Delay | 13 ns (typ, 5 V supply) - ensures deterministic timing in closed-loop control loops. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive subsystems and industrial PLC backplanes. |
Pinout & Package
ISOW7842DWE is housed in a 16-pin Wide SOIC (DWE) package measuring 10.30 mm × 7.50 mm, with 8.0 mm minimum creepage and clearance for reinforced insulation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Primary-side supply input | Accepts 3–5.5 V; powers internal logic and DC-DC primary winding. |
| GND1 (Pins 2, 8) | Primary-side ground reference | Return path for VCC and input-side signals (INA–IND); must be separated from GND2. |
| INA, INB (Pins 3, 4) | Forward-direction inputs | Drive OUTA and OUTB respectively; logic levels referenced to VSI = VCC. |
| INC, IND (Pins 12, 11) | Reverse-direction inputs | Drive OUTC and OUTD respectively; logic levels referenced to VSO = VISO. |
| OUTA, OUTB (Pins 14, 13) | Forward-direction outputs | Isolated outputs referenced to VSO = VISO; drive downstream 3.3 V or 5 V receivers. |
| OUTC, OUTD (Pins 5, 6) | Reverse-direction outputs | Isolated outputs referenced to VSI = VCC; enable feedback or status return across barrier. |
| SEL (Pin 10) | VISO output voltage selector | Connect to GND2 or float → VISO = 3.3 V; connect to VISO → VISO = 5 V. |
| VISO (Pin 16) | Isolated output supply | Regulated output (3.3 V or 5 V) powering secondary-side circuitry and outputs. |
| GND2 (Pins 9, 15) | Secondary-side ground reference | Return path for VISO and output-side signals; galvanically isolated from GND1. |
| NC (Pin 7) | No-connect terminal | Internally unused; must remain unconnected and unbonded on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC converter | Eliminates need for external isolated power supply-reduces BOM count and board area in space-constrained designs like servo drives. |
| Reinforced isolation barrier | 5000 VRMS rating with >100-year lifetime at 1 kVRMS working voltage-meets long-term reliability requirements for medical and grid infrastructure. |
| Configurable channel direction | 2 forward + 2 reverse mapping (ISOW7842-specific) enables bidirectional SPI or UART isolation without external signal routing. |
| Soft-start and protection | Prevents inrush current damage during power-up; includes overload, short-circuit, and thermal shutdown-ensures fault resilience in unattended systems. |
| System-level EMC robustness | Passes IEC 61000-4-2 (±8 kV contact), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) without external filtering-reduces system-level validation effort. |
Applications
| Industrial Motor Control | Grid-Tied Inverters |
|---|---|
Use Scenario: Isolating PWM signals and feedback from gate drivers in 3-phase inverters operating at 690 VAC mains. IC Role / Device Role / Timing Role: Quad-channel isolator providing independent forward/reverse paths for gate drive enable and current sense feedback with <13 ns propagation delay. Use Value: Enables compact, single-package isolation of control and sensing paths while maintaining timing synchronization critical for field-oriented control algorithms. | Use Scenario: Galvanically separating communication between MCU and isolated ADCs monitoring DC-link voltage and grid phase currents. IC Role / Device Role / Timing Role: Provides 3.3 V isolated power and four high-CMTI data channels for SPI-based ADC readout and status reporting. Use Value: Removes need for separate isolated DC-DC and digital isolators-reducing component count, layout complexity, and failure points in solar/wind inverters. |
| Medical Imaging Power Supplies | Programmable Logic Controllers |
Use Scenario: Isolating digital control signals and feedback in high-voltage X-ray generator power supplies compliant with IEC 60601-1. IC Role / Device Role / Timing Role: Reinforced isolator delivering 2 MOPP patient protection and 5000 VRMS isolation for control-to-high-voltage-stage interface. Use Value: Meets stringent creepage/clearance and transient immunity requirements without additional safety components-accelerating regulatory certification. | Use Scenario: Interfacing PLC CPU modules with isolated I/O cards handling 24 VDC field sensors and actuators in factory automation. IC Role / Device Role / Timing Role: Provides bidirectional data isolation (e.g., Modbus RTU) and local 3.3 V power for isolated transceivers and level shifters. Use Value: Supports hot-swap capable I/O modules with self-contained power and signal isolation-improving system uptime and serviceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel isolated power applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6420ARWZ | 4 forward channels only; no reverse direction; 500 mW max output; 25 Mbps data rate. | Suitable for unidirectional control-only isolation; insufficient for bidirectional protocols like SPI or CAN with echo-back. | Select when only forward isolation is needed and lower data rate suffices. |
| SI88642ED-IS | 4 forward channels; integrated DC-DC; 100 Mbps; but no SEL-configurable VISO-fixed 5 V output only. | Lacks flexibility for mixed-voltage systems requiring 3.3 V isolated peripherals; requires external LDO for 3.3 V loads. | Select when fixed 5 V isolated supply is acceptable and SEL pin control is unnecessary. |
Compared with ADUM6420ARWZ and SI88642ED-IS, the ISOW7842DWE uniquely combines bidirectional channel mapping, SEL-selectable VISO, and full 100 Mbps performance-making it optimal for space-constrained, mixed-voltage, bidirectional isolated interfaces in industrial and medical systems.
Availability
ISOW7842DWE is available at Aetrix Electronics and suitable for industrial motor control, grid-tied inverters, medical imaging power supplies, and programmable logic controllers requiring stable component supply and long-lifecycle support.
Supply support for ISOW7842DWE 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 ICs for industrial, automotive, and medical markets.
The ISOW784x family was designed to eliminate external isolated power supplies in compact, high-noise industrial interfaces-integrating robust digital isolation and efficient DC-DC conversion into a single SOIC-WB package.
FAQ
What is the channel configuration of the ISOW7842DWE?
The ISOW7842DWE features a 2-forward / 2-reverse channel configuration: INA and INB drive OUTA and OUTB (forward), while INC and IND are driven by OUTC and OUTD (reverse). This enables bidirectional protocols like SPI without external signal inversion or routing-distinct from ISOW7840 (4 forward) and ISOW7844 (4 reverse). The ISOW7842DWE pinout reflects this mapping in its DWE package layout.
How does the SEL pin configure VISO output voltage on the ISOW7842DWE?
The SEL pin on the ISOW7842DWE selects the regulated isolated supply voltage: connecting SEL to GND2 (or leaving it floating) sets VISO to 3.3 V; connecting SEL to VISO sets VISO to 5 V. This configuration is latched at power-up and remains stable during operation. The ISOW7842DWE's internal regulator maintains ±3% output accuracy across load and temperature-critical for powering isolated ADCs or microcontrollers.
Does the ISOW7842DWE support 3.3 V input supply operation?
Yes, the ISOW7842DWE supports 3-V to 5.5-V primary supply (VCC) and can generate either 3.3 V or 5 V isolated output (VISO) depending on SEL pin state. When VCC = 3.3 V and SEL = GND2, the ISOW7842DWE delivers ≥75 mA at 3.3 V on VISO; when VCC = 5 V and SEL = VISO, it delivers ≥130 mA at 5 V. This flexibility allows the ISOW7842DWE to serve both low-power and higher-current isolated domains.
What safety certifications apply specifically to the ISOW7842DWE?
The ISOW7842DWE carries reinforced isolation certifications including UL 1577 (5000 VRMS), DIN V VDE V 0884-11:2017-01 (7071 VPK transient), CSA IEC 62368-1 and IEC 60601-1 (2 MOPP), CQC GB4943.1-2011, and TUV EN 61010-1. These are verified for the DWE package and apply directly to the ISOW7842DWE part number-not inferred from family-level data-enabling immediate use in safety-critical end equipment.
Can the ISOW7842DWE replace discrete isolator + DC-DC combinations in existing designs?
Yes, the ISOW7842DWE replaces discrete digital isolators (e.g., ISO7741) and isolated DC-DC modules (e.g., DCP020505) in space-constrained applications. Its integrated transformer-based DC-DC delivers up to 0.65 W with <75% efficiency at full load and meets CISPR 32 Class B emissions-eliminating external magnetics, feedback circuits, and layout-sensitive filtering. Migration to ISOW7842DWE reduces bill-of-materials cost and PCB area by ~40% versus discrete solutions.
ISOW7842DWE 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:
- Yes
- 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:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 17.6ns, 17.6ns
- Pulse Width Distortion (Max):
- 4.7ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISOW7842DWE FAQ
1.How can I place an order for ISOW7842DWE through Aetrix?
Please submit a Request for Quotation (RFQ) for ISOW7842DWE 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 ISOW7842DWE reliable?
The price and inventory of ISOW7842DWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISOW7842DWE is usually 5 days.
3.What payment methods are accepted for ISOW7842DWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISOW7842DWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISOW7842DWE?
ISOW7842DWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISOW7842DWE 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 ISOW7842DWE?
For technical support, including ISOW7842DWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISOW7842DWE requirements.
6.How does Aetrix verify that ISOW7842DWE is sourced from the original manufacturer or authorized distributors?
All ISOW7842DWE 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 ISOW7842DWE meets industry standards.
7.What is the process for return or replacement of ISOW7842DWE?
All ISOW7842DWE units undergo pre-shipment inspection (PSI). If there is an issue with ISOW7842DWE, 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 ISOW7842DWE part is unused and in its original packaging.
Return procedure for ISOW7842DWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISOW7842DWE Tags
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