My Inquiry
My Account
Texas Instruments ISOW7740DFMR
- Part No.:
- ISOW7740DFMR
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISOW7740DFMR.pdf
- Description:
- LOW-EMISSIONS, LOW-RIPPLE, QUAD-
- Quantity:
- Payment:
- Shipping:
Inventory:673
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISOW7740DFMR from Texas Instruments is a reinforced quad-channel digital isolator with integrated low-emission, low-noise DC-DC converter. It delivers 100 Mbps data rate, 5000 VRMS isolation rating, 100-kV/µs CMTI, and up to 0.55-W isolated output power (5 V → 5 V @ 110 mA). It operates across –40°C to +125°C and targets space-constrained industrial isolation interfaces such as motor control and grid infrastructure.
For engineers reviewing the ISOW7740DFMR datasheet, ISOW7740DFMR pinout, ISOW7740DFMR application, or ISOW7740DFMR equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options for high-reliability isolated power+signal designs.
Technical Context
The ISOW7740DFMR integrates four unidirectional forward channels (INA→OUTA, INB→OUTB, INC→OUTC, IND→OUTD) and an on-chip transformer-based DC-DC converter operating at 25 MHz. Its dual-supply architecture separates logic (VIO: 1.71–5.5 V) from converter input (VDD: 3–5.5 V), enabling flexible system-level voltage domain management.
Isolation uses double capacitive SiO₂ barriers for signal paths and thin-film polymer-insulated on-chip transformers for power transfer. Safety certifications include VDE DIN VDE V 0884-11:2017-01 (reinforced), UL 1577 (5000 VRMS), IEC 62368-1, and IEC 60601-1 - all validated for 5000 VRMS withstand and 1000 VRMS working voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100 Mbps - supports high-speed UART, SPI, and RS-485 isolation without external clocking. |
| Isolation Rating | 5000 VRMS - meets reinforced insulation requirements for industrial and medical safety standards. |
| CMTI | 100 kV/µs (typical) - ensures robust noise immunity in noisy motor drive and grid environments. |
| Isolated Power Output | 0.55 W max (5 V → 5 V @ 110 mA) - eliminates need for external isolated DC-DC, reducing BOM count and board area. |
| Output Ripple | 24 mVpk-pk - enables direct powering of sensitive analog or low-noise digital circuitry on isolated side. |
| EMI Performance | CISPR 32/EN 55032 Class B compliant with >5 dB margin on 2-layer PCB - simplifies EMC certification. |
| Operating Temp | –40°C to +125°C - supports deployment in under-hood automotive, factory automation, and outdoor grid equipment. |
| Safety Certifications | VDE reinforced, UL 1577, IEC 62368-1, IEC 60601-1, GB 4943.1 - qualified for medical, industrial, and test equipment applications. |
Pinout & Package
ISOW7740DFMR is housed in a 20-pin wide-body SOIC (DFM) package measuring 12.83 mm × 7.5 mm, with creepage/clearance >8 mm and reinforced insulation barrier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Input channels A–D (primary side) | CMOS/LVCMOS logic inputs referenced to VIO/GNDIO; support 1.71–5.5 V logic levels. |
| OUTA, OUTB, OUTC, OUTD | Output channels A–D (isolated side) | Unidirectional outputs referenced to VISOIN/GND2; default high on loss-of-input (non-F variant). |
| VIO, GNDIO | Primary-side logic supply | VIO powers input buffers and EN_IO1/EN_IO2 logic; GNDIO must be shorted to GND1 on PCB. |
| VDD, GND1 | DC-DC converter primary supply | VDD powers internal transformer driver; GND1 must be shorted to GNDIO for common reference. |
| VISOIN, GND2, GISOIN | Isolated-side supply interface | VISOIN supplies isolator outputs; GND2/GISOIN may be shorted or ferrite-bead filtered per layout guidelines. |
| VISOOUT, VSEL | Isolated DC-DC output & selection | VISOOUT delivers regulated 5 V (VSEL = VISOOUT) or 3.3 V (VSEL = GND2); accuracy ±5% over load/temp. |
| EN/FLT | Power converter enable/fault indicator | Configurable as active-high enable or open-drain fault alert (active-low); requires pull-up for FLT mode. |
| EN_IO1, EN_IO2 | Side-1 and side-2 output enables | Independent tri-state control of primary and isolated-side outputs; high or floating = enabled. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Low-Noise DC-DC | 25-MHz switching frequency minimizes conducted EMI; 24-mVpk-pk ripple enables direct powering of ADCs or op-amps. |
| Reinforced Isolation | 5000 VRMS withstand, 1000 VRMS working voltage, and 7071 VPK transient rating certified per VDE/UL/IEC standards. |
| High CMTI & EMC Robustness | 100-kV/µs common-mode rejection and ±8-kV IEC 61000-4-2 contact ESD protection across barrier ensure field reliability. |
| Flexible Power Configuration | VSEL pin selects 5 V or 3.3 V isolated output; independent VIO (1.71–5.5 V) and VDD (3–5.5 V) supplies decouple logic and power domains. |
| Protection Functions | Includes soft-start, UVLO/OVLO, thermal shutdown, short-circuit protection, and fault reporting via EN/FLT pin. |
| Extended Temperature Range | Full 100-Mbps operation from –40°C to +125°C ambient enables use in harsh industrial and automotive under-hood locations. |
Applications
| Motor Control Systems | Grid Infrastructure Monitoring |
|---|---|
|
Use Scenario: Isolating gate-driver control signals and feedback loops in servo drives and inverters. IC Role / Device Role / Timing Role: Quad-channel isolator providing timing-aligned PWM inputs (INA–IND) and status outputs (OUTA–OUTD) across reinforced barrier. Use Value: Eliminates external isolated DC-DC while maintaining 100-Mbps timing fidelity and 100-kV/µs noise immunity in high-dV/dt environments. |
Use Scenario: Signal and power isolation in smart meters, recloser controllers, and substation RTUs. IC Role / Device Role / Timing Role: Provides galvanic separation for RS-485/UART communication and isolated 3.3-V/5-V supply to microcontroller peripherals. Use Value: Meets CISPR 32 Class B emissions on 2-layer PCB and supports 125°C operation in sealed outdoor enclosures. |
| Industrial PLC I/O Modules | Medical Diagnostic Equipment |
|
Use Scenario: Digital input/output isolation in modular PLC backplanes with distributed power domains. IC Role / Device Role / Timing Role: Delivers isolated 5-V logic power (VISOOUT) and forwards sensor/status bits across four independent channels. Use Value: Reduces component count by integrating power + signal isolation, while supporting 1.8–5.5-V logic compatibility via VIO. |
Use Scenario: Isolating patient-connected analog front-ends (ECG, EEG) from digital processing units. IC Role / Device Role / Timing Role: Reinforced isolator meeting IEC 60601-1 2-MOPP requirements and delivering clean 3.3-V isolated supply to ADCs. Use Value: Certified to IEC 60601-1 and CSA 60601-1 with 250-VRMS working voltage, enabling safe patient-side signal acquisition. |
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 forward channels, 5000 VRMS isolation, 500 mW isolated power, but only 50 Mbps data rate and no CISPR 32 Class B margin. | Limited to lower-speed industrial comms; lacks medical-grade certifications (IEC 60601-1, 2-MOPP). | Choose ADUM6420ARWZ when cost sensitivity outweighs speed/emissions requirements and medical compliance is not needed. |
| SI88440ED-IS | 4 forward channels, 5000 VRMS, 600 mW power, 100 Mbps, but uses external LDO for regulation and has higher 45-mV ripple. | Requires additional filtering components for low-noise analog loads; no integrated VSEL configuration. | Choose SI88440ED-IS when board space allows discrete regulation and higher ripple is acceptable for digital-only isolated loads. |
Compared with ADUM6420ARWZ and SI88440ED-IS, ISOW7740DFMR uniquely combines 100 Mbps speed, <25-mV ripple, CISPR 32 Class B margin, and full medical safety certification - making it optimal for high-integrity, space-constrained, mixed-signal isolation.
Availability
ISOW7740DFMR is available at Aetrix Electronics and suitable for motor control systems, grid infrastructure monitoring, and medical diagnostic equipment requiring stable component supply and long-term lifecycle assurance.
Supply support for ISOW7740DFMR 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 isolation technologies with decades of industrial and medical qualification experience.
The ISOW77xx family was designed to eliminate external isolated DC-DC converters in compact, high-noise industrial and medical systems - delivering integrated signal + power isolation in a single SOIC package.
FAQ
What is the maximum data rate supported by the ISOW7740DFMR?
The ISOW7740DFMR supports a guaranteed data rate of 100 Mbps across all four forward channels. This performance is maintained over the full operating temperature range (–40°C to +125°C) and under worst-case supply conditions (VIO = 1.71 V, VISOIN = 3.3 V), as specified in TI's SLLSFK1C datasheet Section 7.3.
Does the ISOW7740DFMR require external components to meet CISPR 32 Class B emissions?
No - the ISOW7740DFMR achieves >5 dB margin to CISPR 32/EN 55032 Class B on a standard 2-layer PCB without ferrite beads or external filters. The integrated DC-DC converter's 25-MHz frequency and emission-optimized layout enable this; however, adding a ferrite bead between VISOIN and VISOOUT is optional for further attenuation in ultra-sensitive designs.
How does the VSEL pin configure the isolated output voltage on the ISOW7740DFMR?
The VSEL pin on the ISOW7740DFMR selects the VISOOUT voltage: shorting VSEL to VISOOUT configures 5 V output (±5%), while shorting VSEL to GND2 configures 3.3 V output (±5%). This selection is hardwired during PCB layout and determines maximum load current - 110 mA at 5 V or 140 mA at 3.3 V - as confirmed in Section 7.9 of the datasheet.
What safety certifications apply specifically to the ISOW7740DFMR (not just the ISOW774x family)?
The ISOW7740DFMR carries VDE reinforced insulation certification per DIN VDE V 0884-11:2017-01, UL 1577 recognition (5000 VRMS, 1 min), IEC 62368-1, IEC 60601-1 (2-MOPP), and GB 4943.1-2011. These are device-specific certifications - not family-level - and are documented in TI's official certificate #40040142 for reinforced insulation.
Can the ISOW7740DFMR operate with different supply voltages on VIO and VDD?
Yes - the ISOW7740DFMR supports independent supplies: VIO (1.71–5.5 V) powers the input logic and EN_IO pins, while VDD (3–5.5 V) powers the DC-DC converter. This allows, for example, 3.3-V MCU I/O interfacing (VIO = 3.3 V) while using 5-V input power (VDD = 5 V), as explicitly permitted in Section 5 of the datasheet.
ISOW7740DFMR 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:
- 4/0
- 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
ISOW7740DFMR FAQ
1.How can I place an order for ISOW7740DFMR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISOW7740DFMR 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 ISOW7740DFMR reliable?
The price and inventory of ISOW7740DFMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISOW7740DFMR is usually 5 days.
3.What payment methods are accepted for ISOW7740DFMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISOW7740DFMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISOW7740DFMR?
ISOW7740DFMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISOW7740DFMR 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 ISOW7740DFMR?
For technical support, including ISOW7740DFMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISOW7740DFMR requirements.
6.How does Aetrix verify that ISOW7740DFMR is sourced from the original manufacturer or authorized distributors?
All ISOW7740DFMR 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 ISOW7740DFMR meets industry standards.
7.What is the process for return or replacement of ISOW7740DFMR?
All ISOW7740DFMR units undergo pre-shipment inspection (PSI). If there is an issue with ISOW7740DFMR, 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 ISOW7740DFMR part is unused and in its original packaging.
Return procedure for ISOW7740DFMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISOW7740DFMR 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
