My Inquiry
My Account
Texas Instruments ISOW7741QDFMRQ1
- Part No.:
- ISOW7741QDFMRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISOW7741QDFMRQ1.pdf
- Description:
- AUTOMOTIVE, LOW-EMISSIONS, QUAD-
- Quantity:
- Payment:
- Shipping:
Inventory:754
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISOW7741QDFMRQ1 from Texas Instruments is a quad-channel automotive-grade digital isolator with integrated low-noise, low-emission DC-DC converter. It delivers up to 110mA at 5V isolated output, supports 100Mbps data rate, features 100kV/µs CMTI, and operates across –40°C to +125°C ambient for battery management systems and traction inverters.
For engineers reviewing the ISOW7741QDFMRQ1 datasheet, ISOW7741QDFMRQ1 pinout, ISOW7741QDFMRQ1 application, or ISOW7741QDFMRQ1 equivalent, key selection criteria include integrated 550mW isolated power, reinforced VDE/UL/IEC safety certifications, SOIC-20 wide-body package, and independent logic (1.71–5.5V) and converter (3–5.5V) supply rails.
Technical Context
The ISOW7741QDFMRQ1 implements galvanic isolation using double capacitive SiO₂ barriers for signal channels and thin-film polymer-insulated on-chip transformers for power conversion. Its 25MHz low-frequency switching architecture minimizes conducted emissions and enables CISPR25 compliance without external filtering.
It integrates soft-start, over-voltage/under-voltage lockout, thermal shutdown, and fault reporting via EN/FLT pin. Default output state is high, distinguishing it from F-suffix variants, and channel enable pins (EN_IO1/EN_IO2) support side-specific output control without affecting isolation integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 100 Mbps - supports high-speed CAN FD, SPI, and UART isolation in EV powertrain control loops. |
| Isolated Power Output | Up to 0.55 W - eliminates need for external isolated DC-DC, reducing BOM count and board area in space-constrained BMS modules. |
| CMTI | 100 kV/µs (typical) - ensures robust noise immunity in high-dV/dt environments like traction inverter gate drivers. |
| Output Ripple | 24 mVpk-pk - enables direct powering of sensitive analog front-ends or MCU peripherals without additional LDOs. |
| Safety Certifications | VDE 0884-17 (reinforced), UL 1577, IEC 62368-1, IEC 61010-1, IEC 60601-1, GB 4943.1 - qualified for functional safety-critical automotive subsystems. |
| Ambient Temperature Range | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and battery-pack applications. |
| Package | 20-pin SOIC wide-body (DFM), 12.83 mm × 10.30 mm - provides ≥8 mm creepage/clearance for reinforced insulation per IEC 60664-1. |
Pinout & Package
ISOW7741QDFMRQ1 uses a 20-pin SOIC wide-body (DFM) package with 1.27 mm pitch, 12.83 mm × 10.30 mm footprint, and reinforced insulation barrier spanning pins 1–10 (side 1) and 11–20 (side 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Input channels A–D (side 1) | Digital inputs referenced to VIO/GNDIO; accept 1.71–5.5V logic levels independently of isolated side. |
| OUTA–OUTD | Output channels A–D (side 2) | CMOS/LVCMOS outputs referenced to VISOIN/GND2; default-high behavior on input loss. |
| VIO, GNDIO, GND1 | Side 1 logic supply | VIO powers input buffers and EN_IOx logic; GNDIO and GND1 must be shorted on PCB. |
| VDD, EN/FLT | Power converter primary | VDD supplies 3–5.5V to DC-DC; EN/FLT serves as enable input (high = on) or open-drain fault alert (low = active). |
| VISOIN, VISOOUT, GND2, GISOIN | Isolated secondary supply | VISOIN powers isolator outputs; VISOOUT delivers regulated 3.3V/5V; GND2/GISOIN may be shorted or ferrite-bead filtered. |
| VSEL | VISOOUT voltage select | Connect to GND2 for 3.3V output; connect to VISOOUT for 5V output - sets max load current (140mA/110mA). |
| EN_IO1, EN_IO2 | Channel output enable | Independent enables for side 1 and side 2 outputs; low = high-Z output, disables transmitter on respective side. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated low-noise DC-DC | 25 MHz switching frequency with <24 mVpk-pk ripple - avoids interference with ADCs, sensors, and RF receivers in vehicle networks. |
| CISPR25 emission compliance | Optimized layout and internal filtering meet Class 5 radiated emissions limits - reduces need for external ferrites or shielding. |
| Robust fault protection | Includes soft-start, UVLO, OVLO, thermal shutdown, and short-circuit detection - prevents latch-up and system-level damage during transients. |
| High CMTI & EMC immunity | 100 kV/µs common-mode rejection plus ±8 kV IEC 61000-4-2 contact ESD across barrier - sustains operation in noisy motor drive environments. |
| Flexible supply architecture | Independent VIO (1.71–5.5V) and VDD (3–5.5V) rails allow mixed-voltage interfacing - e.g., 1.8V MCU to 5V isolated sensor bus. |
Applications
| Battery Management System (BMS) | On-Board Charger (OBC) |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring and pack communication between high-voltage battery stack and low-voltage controller. IC Role / Device Role / Timing Role: Quad-channel isolator bridges SPI/UART signals while supplying isolated 5V/110mA power to ADCs and local microcontrollers. Use Value: Eliminates external isolated DC-DC, reduces component count by ≥3 parts, and maintains <±5% VISOOUT accuracy across temperature. |
Use Scenario: Signal and power isolation between AC/DC rectifier control and DC-link monitoring circuits in bidirectional OBC units. IC Role / Device Role / Timing Role: Provides timing-isolated gate driver enable signals and feedback telemetry with integrated 3.3V/140mA isolated rail. Use Value: Enables compact, EMI-compliant design meeting CISPR25 Class 5 without added filter components or layout iterations. |
| Traction Inverter Control | DC/DC Converter Monitoring |
|
Use Scenario: Isolating PWM commands and fault status between inverter MCU and high-side IGBT/SiC gate drivers. IC Role / Device Role / Timing Role: Delivers 100Mbps data rate and 100kV/µs CMTI to withstand >50kV/µs dV/dt in 800V EV architectures. Use Value: Prevents false triggering and latch-up during fast-switching events, improving system reliability and ASIL-B compliance. |
Use Scenario: Isolating voltage/current sensing and control loop signals in 48V–12V bidirectional DC/DC converters for 48V mild-hybrid systems. IC Role / Device Role / Timing Role: Supplies isolated 3.3V/60mA power to isolated op-amps and ADCs while transmitting analog feedback digitally. Use Value: Supports extended –40°C to +125°C operation with <1% load regulation, ensuring stable sensing accuracy across thermal cycles. |
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 |
|---|---|---|---|
| SI88440Q-IS | No integrated DC-DC; requires external isolated supply; 150Mbps data rate; 5kVRMS isolation rating. | Higher speed but no power integration - increases BOM cost and layout complexity in space-constrained BMS modules. | Choose when >100Mbps is required and isolated power is already available on board. |
| ADUM6420ARWZ-RL | Integrated 500mW DC-DC; 25Mbps data rate; 5kVRMS; only two isolated data channels (not quad). | Limited channel count forces use of multiple devices for full BMS or inverter interface - increasing footprint and supply coordination overhead. | Choose for lower-speed, dual-channel applications where ADI ecosystem compatibility is prioritized. |
Compared with SI88440Q-IS and ADUM6420ARWZ-RL, ISOW7741QDFMRQ1 uniquely combines quad-channel 100Mbps isolation, 550mW integrated power, and automotive safety certifications in a single SOIC-20 package - delivering lowest component count and highest integration for EV power electronics.
Availability
ISOW7741QDFMRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.
Supply support for ISOW7741QDFMRQ1 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 automotive ICs, with decades of expertise in isolation technology and functional safety certification.
The ISOW774x-Q1 product line was designed specifically for high-reliability automotive electrification systems - integrating signal isolation and isolated power to simplify architecture and accelerate time-to-certification for ASIL-B/C subsystems.
FAQ
What is the maximum isolated output current supported by ISOW7741QDFMRQ1 at 5V?
ISOW7741QDFMRQ1 delivers up to 110mA at 5V when VSEL is tied to VISOOUT. This is confirmed in the Electrical Characteristics table (Section 5.9) under "VDD = 5 V, VISOOUT = 5 V" conditions. The device maintains ±5% VISOOUT accuracy across this load range and ambient temperatures from –40°C to +125°C, making it suitable for powering isolated MCUs or ADCs in battery management systems.
Does ISOW7741QDFMRQ1 support 1.8V logic interfaces on the primary side?
Yes, ISOW7741QDFMRQ1 supports VIO from 1.71V to 5.5V, including 1.8V operation. Section 5.3 specifies VIH = 0.7 × VSI and VIL = 0.3 × VSI for 1.8V mode, and Section 5.17 confirms electrical characteristics at 1.8V. This allows direct interfacing with low-voltage microcontrollers without level shifters, preserving timing integrity and reducing board complexity.
How does the EN/FLT pin function in ISOW7741QDFMRQ1?
The EN/FLT pin on ISOW7741QDFMRQ1 is a dual-function terminal: configured as an input, it enables/disables the integrated DC-DC converter (high = enabled); configured as an output, it asserts low during faults like overtemperature or short-circuit. TI's datasheet (Section 4, Pin Description) states it must be used exclusively as one or the other - not both simultaneously - and requires a ≥5kΩ pull-up resistor when used as fault indicator.
What safety certifications apply to ISOW7741QDFMRQ1?
ISOW7741QDFMRQ1 holds VDE 0884-17 (DIN EN IEC 60747-17) reinforced insulation, UL 1577 component recognition, IEC 62368-1, IEC 61010-1, IEC 60601-1, and GB 4943.1 certifications. These are documented in Section 5.7 and the Device Information table. All certifications were obtained per AEC-Q100 Grade 1 qualification, confirming suitability for automotive safety-critical subsystems.
Can ISOW7741QDFMRQ1 replace ISOW7742QDFMRQ1 in a design?
No - ISOW7741QDFMRQ1 and ISOW7742QDFMRQ1 have different pinouts: INC is on pin 4 in ISOW7741QDFMRQ1 but on pin 17 in ISOW7742QDFMRQ1, and OUTC is on pin 17 vs. pin 4 respectively. The datasheet's Pin Configuration figures (4-1 and 4-2) confirm non-interchangeability. Swapping them would cause signal misrouting and functional failure without PCB revision.
ISOW7741QDFMRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- ISOW774x-Q1
- 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:
- 3/1
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
ISOW7741QDFMRQ1 FAQ
1.How can I place an order for ISOW7741QDFMRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISOW7741QDFMRQ1 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 ISOW7741QDFMRQ1 reliable?
The price and inventory of ISOW7741QDFMRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISOW7741QDFMRQ1 is usually 5 days.
3.What payment methods are accepted for ISOW7741QDFMRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISOW7741QDFMRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISOW7741QDFMRQ1?
ISOW7741QDFMRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISOW7741QDFMRQ1 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 ISOW7741QDFMRQ1?
For technical support, including ISOW7741QDFMRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISOW7741QDFMRQ1 requirements.
6.How does Aetrix verify that ISOW7741QDFMRQ1 is sourced from the original manufacturer or authorized distributors?
All ISOW7741QDFMRQ1 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 ISOW7741QDFMRQ1 meets industry standards.
7.What is the process for return or replacement of ISOW7741QDFMRQ1?
All ISOW7741QDFMRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISOW7741QDFMRQ1, 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 ISOW7741QDFMRQ1 part is unused and in its original packaging.
Return procedure for ISOW7741QDFMRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISOW7741QDFMRQ1 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…
