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Texas Instruments ISOW7844FDWE
- Part No.:
- ISOW7844FDWE
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISOW7844FDWE.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:131
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Product details
Overview
ISOW7844FDWE 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 supports 3.3 V to 5 V input/output configurations and operates across –40°C to +125°C for industrial motor control and medical equipment interfaces.
For engineers reviewing the ISOW7844FDWE datasheet, ISOW7844FDWE pinout, ISOW7844FDWE application, or ISOW7844FDWE equivalent, key selection criteria include channel directionality (all outputs on isolated side), SEL-configurable VISO (3.3 V or 5 V), thermal derating at >80°C ambient, and compliance with IEC 60601-1 for patient-connected systems.
Technical Context
The ISOW7844FDWE implements four unidirectional output channels (OUTA–OUTD) driven by input-side signals (INA–IND), with all data paths crossing the reinforced SiO₂ capacitive barrier. Its integrated transformer-based DC-DC converter delivers regulated isolated power without external magnetics.
Signal isolation uses double capacitive SiO₂ barriers; power isolation employs thin-film polymer-insulated on-chip transformers. The SEL pin selects VISO output voltage (3.3 V when grounded/floating, 5 V when tied to VISO), defining the isolated supply rail for all output buffers and internal circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 100 Mbps - supports high-speed serial interfaces like isolated SPI and RS-485 transceivers without timing bottlenecks. |
| Isolation rating | 5000 VRMS - meets UL 1577 and DIN V VDE V 0884-11 reinforced insulation requirements for safety-critical systems. |
| CMTI | ±100 kV/µs - ensures reliable operation in noisy motor drive and grid infrastructure environments with fast transient coupling. |
| VISO output | Configurable 3.3 V or 5 V - selectable via SEL pin; enables direct interfacing with 3.3 V microcontrollers or 5 V logic without external LDOs. |
| Output power | Up to 0.65 W - sufficient to power isolated ADCs, gate drivers, or small MCUs, eliminating need for discrete isolated DC-DC modules. |
| Propagation delay | 13 ns (typ, 5-V supply) - enables tight timing budgets in real-time control loops and synchronized sampling applications. |
| Operating temperature | –40°C to +125°C - supports under-hood automotive subsystems and industrial PLC backplanes without derating. |
Pinout & Package
ISOW7844FDWE is housed in a 16-pin wide-body SOIC (DWE) package measuring 10.30 mm × 7.50 mm, with creepage and clearance >8 mm and reinforced insulation per IEC 60601-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Primary-side supply input | 3–5.5 V input referenced to GND1; powers input logic and DC-DC primary winding. |
| GND1 (Pins 2, 8) | Primary-side ground | Reference for VCC and input-side signals (INA–IND); must be separated from GND2 by PCB isolation gap. |
| OUTA–OUTD (Pins 3–6) | Isolated output channels | All four outputs reside on isolated side; driven by internal buffers powered by VISO; default state is low (F-suffix device). |
| NC (Pin 7) | No-connect terminal | Internally unused; must remain unconnected and unbonded on PCB layout. |
| VISO (Pin 16) | Isolated supply output | Regulated 3.3 V or 5 V output referenced to GND2; load current capability depends on input/output configuration (≥40 mA for 3.3 V → 5 V). |
| GND2 (Pins 9, 15) | Isolated-side ground | Reference for VISO and output-side logic; forms secondary ground domain separated by reinforced barrier. |
| INA–IND (Pins 14, 13, 12, 11) | Input signal terminals | Accept CMOS/LVCMOS inputs referenced to VSI (VCC or VISO depending on channel direction); all inputs on primary side for ISOW7844FDWE. |
| SEL (Pin 10) | VISO voltage select control | Determines VISO output: shorted to GND2 or floating → 3.3 V; shorted to VISO → 5 V; no pull-up/down required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC converter | Eliminates external isolated power supply; reduces BOM count and board area in space-constrained designs such as modular I/O cards. |
| Reinforced isolation barrier | 5000 VRMS rating and >100-year lifetime at 1 kVRMS working voltage enable use in Class I medical devices and industrial safety systems. |
| High CMTI (±100 kV/µs) | Prevents data corruption during fast-switching events in motor drives and inverters, ensuring deterministic communication over long cables. |
| SEL-configurable VISO | Single pin selects isolated rail voltage, simplifying design reuse across 3.3 V and 5 V target systems without component change. |
| System-level EMC immunity | ±8 kV IEC 61000-4-2 contact ESD protection across barrier and low emissions meet EN 55032 Class B without added filtering. |
Applications
| Industrial Motor Control | Medical Patient Monitoring |
|---|---|
Use Scenario: Isolating PWM gate driver signals and feedback from current/voltage sensors in servo drives. IC Role / Device Role / Timing Role: Quad-channel isolator providing timing-aligned, noise-immune signal transfer between MCU and power stage, with integrated 5 V VISO powering isolated gate drivers. Use Value: Enables compact, single-chip isolated power + signal solution replacing discrete isolators + DC-DC, reducing layout complexity and improving system reliability. | Use Scenario: Galvanically isolating ECG/EEG analog front-end ADCs from host processor in bedside monitors. IC Role / Device Role / Timing Role: Reinforced isolator delivering 3.3 V VISO to power isolated ADC and SPI interface, meeting 2 MOPP requirements per IEC 60601-1. Use Value: Achieves certified patient isolation while supporting high-resolution, low-noise data acquisition without external isolated supplies. |
| Smart Grid Protection Relays | Test & Measurement Equipment |
Use Scenario: Isolating digital I/O and communication lines between high-voltage protection logic and low-voltage control units in substation relays. IC Role / Device Role / Timing Role: High-CMTI isolator handling fast trip commands and status reporting across 5000 VRMS barrier, with SEL set to 5 V for compatibility with legacy 5 V logic. Use Value: Ensures immunity to 10 kVPK surges and fast transients on distribution lines, maintaining functional safety during fault conditions. | Use Scenario: Isolating USB-to-SPI bridge ICs and precision DACs in automated test equipment racks. IC Role / Device Role / Timing Role: Signal isolator providing 100 Mbps throughput for high-speed calibration data streaming, with integrated 3.3 V VISO powering isolated USB PHY. Use Value: Reduces ground loop errors and common-mode noise in multi-channel measurement systems, improving measurement accuracy and repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel isolated power + signal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6420ARWZ | 4-channel isolator + 500 mW isolated DC-DC; 50 Mbps max data rate; 2.5 kVRMS isolation; no SEL pin - fixed 5 V VISO. | Suitable for lower-speed industrial I/O where 50 Mbps suffices and 5 V only is acceptable; lacks medical certification. | Select when cost sensitivity outweighs speed and safety certification needs; verify thermal margin at full load. |
| SI88642ED-IS | Quad-channel isolator + 500 mW DC-DC; 100 Mbps; 5 kVRMS; 3.75 kV RMS reinforced rating; no integrated SEL - requires external resistor network for VISO selection. | Compatible with high-noise environments but lacks IEC 60601-1 approval; different pinout requires PCB redesign. | Choose for non-medical applications needing identical speed and isolation, accepting additional external components for voltage configuration. |
Compared with ADUM6420ARWZ and SI88642ED-IS, the ISOW7844FDWE provides higher data rate, certified 2 MOPP medical isolation, and simpler VISO configuration via SEL-making it optimal for next-generation motor drives and certified patient-connected devices where integration and compliance are critical.
Availability
ISOW7844FDWE is available at Aetrix Electronics and suitable for industrial motor control, medical patient monitoring, smart grid protection relays, and test & measurement equipment requiring stable component supply and long-term lifecycle support.
Supply support for ISOW7844FDWE 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 isolation, power management, and signal chain solutions.
The ISOW784x product line was designed to integrate isolated signal and power in a single package for space-constrained, high-reliability applications including industrial automation, energy infrastructure, and medical electronics.
FAQ
What is the default output state of ISOW7844FDWE?
The ISOW7844FDWE has a low-default output state due to its "F" suffix designation. When input signals are lost or undefined, all four output channels (OUTA–OUTD) drive low. This behavior is confirmed in the device family datasheet Section 5 and applies specifically to ISOW7844FDWE across its full operating temperature and supply range.
How does the SEL pin configure VISO voltage in ISOW7844FDWE?
The SEL pin on ISOW7844FDWE sets the isolated output voltage: connecting SEL to GND2 or leaving it floating configures VISO to 3.3 V; connecting SEL to VISO configures VISO to 5 V. This selection is implemented internally and requires no external resistors or configuration registers - a hardware-only, pin-strapped interface unique to the ISOW784x family.
Does ISOW7844FDWE support bidirectional data channels?
No, ISOW7844FDWE provides four unidirectional output channels only (OUTA–OUTD). Input signals (INA–IND) are all located on the primary side (VCC/GND1 domain), and outputs reside exclusively on the isolated side (VISO/GND2 domain). This directional architecture is fixed per the ISOW7844 variant and differs from ISOW7840–ISOW7843 which offer mixed forward/reverse channel configurations.
What safety certifications apply to ISOW7844FDWE?
ISOW7844FDWE holds TUV EN 61010-1 and EN 60950-1 certification, UL 1577 recognition (5000 VRMS), VDE DIN V VDE V 0884-11:2017-01 reinforced insulation (7071 VPK), CSA IEC 62368-1 and IEC 60601-1 (2 MOPP), and CQC GB 4943.1-2011 approval - making it qualified for Class I medical devices and industrial safety systems.
Can ISOW7844FDWE power an external isolated load?
Yes, ISOW7844FDWE can deliver up to 0.65 W of isolated power: ≥40 mA at 5 V when configured for 3.3 V input → 5 V output, ≥75 mA at 3.3 V for 3.3 V → 3.3 V, and ≥130 mA at 5 V for 5 V → 5 V. Load regulation remains within ±5% across full temperature and line ranges, enabling direct powering of isolated ADCs, gate drivers, or microcontrollers without external regulators.
ISOW7844FDWE 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:
- 0/4
- 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
ISOW7844FDWE FAQ
1.How can I place an order for ISOW7844FDWE through Aetrix?
Please submit a Request for Quotation (RFQ) for ISOW7844FDWE 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 ISOW7844FDWE reliable?
The price and inventory of ISOW7844FDWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISOW7844FDWE is usually 5 days.
3.What payment methods are accepted for ISOW7844FDWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISOW7844FDWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISOW7844FDWE?
ISOW7844FDWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISOW7844FDWE 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 ISOW7844FDWE?
For technical support, including ISOW7844FDWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISOW7844FDWE requirements.
6.How does Aetrix verify that ISOW7844FDWE is sourced from the original manufacturer or authorized distributors?
All ISOW7844FDWE 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 ISOW7844FDWE meets industry standards.
7.What is the process for return or replacement of ISOW7844FDWE?
All ISOW7844FDWE units undergo pre-shipment inspection (PSI). If there is an issue with ISOW7844FDWE, 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 ISOW7844FDWE part is unused and in its original packaging.
Return procedure for ISOW7844FDWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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