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Texas Instruments ISOW7744DFMR
- Part No.:
- ISOW7744DFMR
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISOW7744DFMR.pdf
- Description:
- LOW-EMISSIONS, LOW-RIPPLE, QUAD-
- Quantity:
- Payment:
- Shipping:
Inventory:148
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Product details
Overview
ISOW7744DFMR from Texas Instruments is a reinforced quad-channel digital isolator with integrated low-noise, low-emission DC-DC converter delivering up to 550 mW isolated power. It supports 100 Mbps data rate, operates across –40°C to +125°C, and provides 5000 VRMS reinforced isolation in a 20-pin SOIC-WB package. It enables compact isolated UART/SPI/RS-485 interfaces in motor control and grid infrastructure systems.
For engineers reviewing the ISOW7744DFMR datasheet, ISOW7744DFMR pinout, ISOW7744DFMR application, or ISOW7744DFMR equivalent, key selection criteria include its integrated 5 V/3.3 V selectable isolated power (110 mA @ 5 V), 100-kV/µs CMTI, CISPR 32 Class B compliance on 2-layer board, and dual independent supply domains (VIO: 1.71–5.5 V; VDD: 3–5.5 V).
Technical Context
The ISOW7744DFMR integrates four unidirectional signal channels (4 forward, 0 reverse) separated by SiO₂ capacitive barriers and an on-chip transformer-based DC-DC converter operating at 25 MHz. Its isolation barrier meets DIN VDE V 0884-11:2017-01 reinforced insulation with 7071 VPK transient voltage rating and 6250 VPK surge withstand.
It implements soft-start, over-voltage/under-voltage lockout, short-circuit protection, thermal shutdown, and fault reporting via EN/FLT pin. VSEL pin selects VISOOUT output between 5 V (shorted to VISOOUT) or 3.3 V (shorted to GND2), enabling flexible isolated rail generation without external regulators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100 Mbps - supports high-speed isolated SPI and UART links without external timing constraints. |
| Isolation Rating | 5000 VRMS reinforced - certified per UL 1577, VDE DIN VDE V 0884-11, IEC 62368-1, and IEC 60601-1 for safety-critical medical and industrial use. |
| CMTI | 100 kV/µs (typical) - ensures robust noise immunity against fast transients in motor drives and power converters. |
| VISOOUT Options | Selectable 5 V (110 mA max) or 3.3 V (140 mA max) - eliminates need for discrete isolated DC-DC or LDO in space-constrained designs. |
| Output Ripple | 24 mV pk-pk @ 5 V/110 mA - low enough to directly power sensitive ADCs, sensors, or MCU cores without additional filtering. |
| EMI Performance | CISPR 32/EN 55032 Class B compliant with >5 dB margin on 2-layer PCB - reduces layout complexity and eliminates ferrite bead dependency in many cases. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor grid equipment. |
Pinout & Package
Package: 20-pin wide-body SOIC (DFM), 12.83 mm × 7.5 mm, creepage/clearance >8 mm, reinforced insulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Primary-side digital inputs | Four forward-direction logic inputs referenced to VIO/GNDIO; accept 1.71–5.5 V logic levels. |
| OUTA, OUTB, OUTC, OUTD | Secondary-side digital outputs | Four forward-direction CMOS outputs referenced to VISOIN/GND2; drive up to ±4 mA at 5 V. |
| VIO, GNDIO | Primary logic supply domain | Independent 1.71–5.5 V supply for input buffers and EN_IO1/EN_IO2 logic; decoupled from power converter domain. |
| VDD, GND1 | Power converter primary supply | 3–5.5 V input for integrated DC-DC; must be shorted to GNDIO on PCB for common reference. |
| VISOIN, GND2, GISOIN | Secondary-side isolation channel supply | VISOIN powers output buffers; GND2 and GISOIN may be shorted or connected via ferrite bead to suppress common-mode noise. |
| VISOOUT, VSEL | Isolated DC-DC output & selection | VISOOUT delivers regulated 5 V or 3.3 V; VSEL tied to VISOOUT = 5 V, tied to GND2 = 3.3 V. |
| EN/FLT | Power converter enable/fault indicator | Configurable as active-high enable or open-drain active-low fault flag; reports over-temp, short-circuit, or UVLO events. |
| EN_IO1, EN_IO2 | Side-1 and side-2 output enables | Tri-state control for primary and secondary output banks independently; supports dynamic power gating. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 550-mW DC-DC converter | Eliminates external isolated power supply, reducing BOM count and PCB area in space-constrained isolated interfaces. |
| CISPR 32 Class B compliance on 2-layer board | Validated emissions performance removes need for complex EMI filtering or 4+ layer stackups in cost-sensitive industrial designs. |
| 100-kV/µs CMTI | Prevents data corruption during fast switching events in motor gate drivers and inverters with high dv/dt noise. |
| Dual independent supply domains | Allows VIO (1.71–5.5 V) and VDD (3–5.5 V) to operate at different voltages-enabling mixed-voltage system interfacing without level shifters. |
| VSEL-configurable VISOOUT | Single footprint supports both 5 V and 3.3 V isolated rails via simple PCB trace routing-reducing SKU proliferation. |
Applications
| Factory Automation | Motor Control |
|---|---|
Use Scenario: Isolated PLC I/O modules communicating with field sensors and actuators over RS-485. IC Role / Device Role / Timing Role: Quad-channel isolator providing signal integrity and galvanic separation between controller and noisy factory floor bus. Use Value: Enables reliable 100 Mbps data exchange while suppressing ground-loop noise and meeting IEC 61000-4-4/6 surge immunity requirements. | Use Scenario: Isolating gate driver signals and feedback in 3-phase inverter drives. IC Role / Device Role / Timing Role: Forward-only signal isolator delivering PWM and fault signals across high-voltage barriers with 100-kV/µs CMTI. Use Value: Prevents false triggering of IGBTs/MOSFETs during fast switching transients, improving system reliability and safety certification path. |
| Grid Infrastructure | Medical Equipment |
Use Scenario: Smart meter communication interfaces (e.g., isolated UART to NB-IoT modem). IC Role / Device Role / Timing Role: Provides reinforced isolation and integrated 3.3 V isolated power for low-power wireless modems. Use Value: Meets IEC 62368-1 and IEC 61000-4-x immunity standards while eliminating external isolated DC-DC, reducing bill-of-materials cost. | Use Scenario: Patient-monitoring devices requiring 2 MOPP isolation between sensor front-end and host MCU. IC Role / Device Role / Timing Role: Reinforced isolator certified to IEC 60601-1 and CSA 60601-1 for patient-connected circuits. Use Value: Delivers 5000 VRMS isolation and 7071 VPK transient withstand-fulfilling critical safety requirements without external isolation components. |
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 |
|---|---|---|---|
| ADUM6420ARIZ | 4-channel, 50 Mbps, 500 mW isolated power, 2500 VRMS basic isolation, no CISPR 32 Class B validation | Limited to non-safety-critical industrial use; lacks reinforced certification and high-speed capability | Choose when lower data rate and basic isolation suffice, and EMI validation is handled externally. |
| SI88442ED-IS | 4-channel, 150 Mbps, 500 mW isolated power, 5000 VRMS reinforced, but no integrated VSEL or 2-layer CISPR 32 Class B guarantee | Higher speed but requires external filtering for EMI compliance; no built-in VISOOUT voltage selection | Prefer when maximum data throughput is prioritized and board-level EMI mitigation is acceptable. |
Compared with ADUM6420ARIZ and SI88442ED-IS, the ISOW7744DFMR uniquely combines 100 Mbps speed, reinforced 5000 VRMS isolation, integrated VSEL-selectable 5 V/3.3 V output, and guaranteed CISPR 32 Class B compliance on 2-layer PCB-making it optimal for compact, safety-certifiable, high-noise industrial interfaces.
Availability
ISOW7744DFMR is available at Aetrix Electronics and suitable for factory automation, motor control, and grid infrastructure applications requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for ISOW7744DFMR 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 ISOW77xx family was designed to eliminate external isolated power supplies in space-constrained digital isolation applications-delivering integrated, low-noise, EMI-compliant power and signal isolation in a single SOIC package.
FAQ
What is the maximum load current supported by ISOW7744DFMR at 5 V isolated output?
The ISOW7744DFMR supports up to 110 mA at 5 V VISOOUT when VSEL is shorted to VISOOUT. This is verified under recommended operating conditions with VDD = 5 V and ambient temperature ≤ 85°C. The device maintains 4.5–5.25 V regulation across this load range, enabling direct powering of isolated microcontrollers or transceivers without external regulation.
Does ISOW7744DFMR support bidirectional data channels?
No, ISOW7744DFMR is configured with four forward-only channels (INA→OUTA, INB→OUTB, INC→OUTC, IND→OUTD). It belongs to the ISOW774x variant group where the final digit '4' indicates four forward and zero reverse channels. For bidirectional configurations, TI offers ISOW7741 (3 forward, 1 reverse) and ISOW7742 (2 forward, 2 reverse).
How does the EN/FLT pin function in ISOW7744DFMR?
The EN/FLT pin on ISOW7744DFMR serves a dual role: as an active-high enable input to start/stop the integrated DC-DC converter, or as an open-drain active-low fault output signaling over-temperature, short-circuit, or UVLO events. Configuration is determined by external circuitry-no internal mode selection. The ISOW7744DFMR datasheet specifies pull-up resistor requirements and timing behavior for both modes.
What safety certifications apply specifically to ISOW7744DFMR?
ISOW7744DFMR holds VDE reinforced insulation certification per DIN VDE V 0884-11:2017-01, UL 1577 recognition (5000 VRMS, 1 min), IEC 62368-1, IEC 61010-1, IEC 60601-1 (2 MOPP), and GB 4943.1-2011. These apply to the ISOW774x (reinforced) variant; ISOW774xB variants are rated for basic insulation only.
Can ISOW7744DFMR operate with different input and output logic voltages?
Yes, ISOW7744DFMR supports independent supply domains: VIO (1.71–5.5 V) powers primary-side logic, while VISOIN (1.71–5.5 V) powers secondary-side outputs. This allows interfacing between, for example, a 1.8-V FPGA and a 3.3-V isolated ADC-without external level shifters-as long as each domain's voltage remains within its specified range and sequencing requirements are met.
ISOW7744DFMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- ISOW774x
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 85kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 15.7ns, 15.7ns
- Pulse Width Distortion (Max):
- 5ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.4ns
- Voltage - Supply:
- 2.97V ~ 3.63V, 4.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
ISOW7744DFMR FAQ
1.How can I place an order for ISOW7744DFMR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISOW7744DFMR 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 ISOW7744DFMR reliable?
The price and inventory of ISOW7744DFMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISOW7744DFMR is usually 5 days.
3.What payment methods are accepted for ISOW7744DFMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISOW7744DFMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISOW7744DFMR?
ISOW7744DFMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISOW7744DFMR 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 ISOW7744DFMR?
For technical support, including ISOW7744DFMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISOW7744DFMR requirements.
6.How does Aetrix verify that ISOW7744DFMR is sourced from the original manufacturer or authorized distributors?
All ISOW7744DFMR 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 ISOW7744DFMR meets industry standards.
7.What is the process for return or replacement of ISOW7744DFMR?
All ISOW7744DFMR units undergo pre-shipment inspection (PSI). If there is an issue with ISOW7744DFMR, 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 ISOW7744DFMR part is unused and in its original packaging.
Return procedure for ISOW7744DFMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISOW7744DFMR Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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