ISO7741QDWWQ1

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1. Describe

The ISO7741QDWWQ1 automotive device is a high-performance, quad-channel digital isolator with 5700 VRMS (DWW package), 5000 VRMS (DW package), and 3000 VRMS (DBQ package) isolation ratings per UL 1577. This family of devices features reinforced insulation ratings that meet UL 1577 to VDE, CSA, TUV and CQC. The ISO7741QDWWQ1 device provides high electromagnetic immunity and low emissions at low power consumption while isolating CMOS or LVCMOS digital I/O. Each isolated channel has a logic input and output buffer separated by a dual-capacitor silicon dioxide (SiO2) insulating barrier. These devices feature enable pins that can be used to place their respective outputs in high impedance for multi-master drive applications and reduce power consumption. The ISO7740-Q1 device has all four channels in the same direction, the ISO7741-Q1 device has three forward channels and one reverse channel, and the ISO7742-Q1 device has two forward and two reverse channels. If input power or signal is lost, the default output is high for devices without the suffix F, and low for devices with the suffix F. See the Device Functional Modes section for details.

2. Feature

    1. Compliant with automotive application requirements

    2. AEC-Q100 qualified with the following results:

        – Device Temperature Grade 1: –40°C to 125°C ambient operating temperature

    3. Functional safety capabilities

        – Documents available to aid functional safety system design: ISO7740-Q1, ISO7741-Q1, ISO7742-Q1

    4. 100 Mbps data rate

    5. Robust Isolation Barrier:

        – Expected service life >100 years at 1500 VRMS operating voltage

        – Isolation rating up to 5700 VRMS

        – Surge capability up to 12.8 kV

        – ±100 kV/μs typical CMTI

    6. Wide supply range: 2.25 V to 5.5 V

    7. 2.25V to 5.5V level translation

    8. Default output high (ISO774x) and low (ISO774xF) options

    9. Low power consumption, typically 1.5 mA per channel at 1 Mbps

  10. Low propagation delay: 10.7 ns typical (5V supply)

  11. Strong Electromagnetic Compatibility (EMC)

        – System level ESD, EFT and surge immunity

        – ±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier

        – low emissions

  12. Ultra-Wide SOIC (DWW-16), Wide SOIC (DW-16) and QSOP (DBQ-16) package options

  13. Safety related certifications:

        – DIN VDE V 0884-11:2017-01

        – UL 1577 Component Identification Program 

        – CSA, CQC and TUV certification

3. Application

    1. Hybrid, Electric and Powertrain (EV/HEV)

        – Battery Management System (BMS)

        – car charger

        – Traction inverter 

        – DC/DC converter

        – Inverter and motor control

4. Pin configuration

5. Pin Description

6. Application Information

The ISO7741QDWWQ1 device is a high-performance, quad-channel digital isolator. These devices have an enable pin on each side that can be used to place the respective output at high impedance for multi-master drive applications and reduce power consumption. The ISO7741QDWWQ1 device uses single-ended CMOS logic switching technology. The voltage range of the two power supplies, VCC1 and VCC2, is 2.25 V to 5.5 V. When designing digital isolators, keep in mind that due to the single-ended design construction, digital isolators do not meet Any specific interface standard for isolation of single-ended CMOS or TTL digital signals only Wire. Isolators are usually placed between the data controller (i.e. μC or UART) and the data converter or Line transceivers, regardless of interface type or standard.