EmbeddedRelated.com
    Parts    ISO7742DBQR
ISO7742DBQR

TIISO7742DBQR

Texas Instruments
General Purpose Digital Isolator 3000Vrms 4 Channel 100Mbps 85kV/µs CMTI 16-SSOP (0.154", 3.90mm Width)
Active8,580 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The ISO7742DBQR is a high-performance, quad-channel digital isolator providing 3000Vrms isolation. It features a 2/2 channel configuration and supports data rates up to 100Mbps while maintaining high common-mode transient immunity of 85kV/us. This device is designed to provide reliable signal isolation in harsh industrial environments with supply voltages ranging from 2.25V to 5.5V.

Why Choose This Part

This isolator offers a robust 85kV/us typical CMTI and low propagation delay of 10.7ns at 5V, ensuring high signal integrity. The 2.25V to 5.5V supply range allows for seamless level translation between different logic families. It is also highly efficient, consuming only 1.5mA per channel at 1Mbps.

Applications

Industrial Fieldbus Isolation
Protects sensitive controllers in RS-485, CAN, or Profibus networks from high-voltage transients and ground loops.
Isolated SPI/UART Communication
Enables high-speed 100Mbps data transfer between a microcontroller and peripherals operating on different voltage domains.
Motor Control Feedback
Safely transmits PWM signals and encoder feedback between high-power inverter stages and low-voltage control logic.
Battery Management Systems
Provides the necessary isolation barrier for monitoring high-voltage battery stacks in energy storage systems.

Key Specifications

Type General Purpose
Data Rate 100Mbps
Technology Capacitive Coupling
Channel Type Unidirectional
Mounting Type Surface Mount
Isolated Power No
Package / Case 16-SSOP (0.154", 3.90mm Width)
Voltage - Supply 2.25V ~ 5.5V
Number of Channels 4
Voltage - Isolation 3000Vrms
Operating Temperature -55degC ~ 125degC
Inputs - Side 1/Side 2 2/2
Rise / Fall Time (Typ) 2.4ns, 2.4ns
Supplier Device Package 16-SSOP
Pulse Width Distortion (Max) 5.9ns
Propagation Delay tpLH / tpHL (Max) 17ns, 17ns
Common Mode Transient Immunity (Min) 85kV/us

Getting Started

When designing with the ISO7742, place 0.1uF ceramic bypass capacitors as close as possible to the VCC1 and VCC2 pins. Ensure that the PCB layout maintains the required creepage and clearance distances under the 16-SSOP package to meet safety certifications. The ISO7741EVM evaluation board can be used to quickly benchmark signal integrity and timing characteristics.

ISO7742 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Voltage - Isolation Temp Range Stock
ISO7742DBQR (this part) SSOP-16 3000V -55degC ~ 125degC 8,580
ISO7742DWR SOIC-16 5000V -55degC ~ 125degC 9,386
ISO7742QDWRQ1 SOIC-16 5000V -40degC ~ 125degC 5,460