Dual channel standard digital isolators
Dual channel standard digital isolators

Product Details

General Description

The CA-IS374x-Q1 devices are high-performance fourchannel, unidirectional digital isolators with up to 5kVRMS wide-body package isolation rating and DC to 150Mbpsultra-fast data rate. The CA-IS374x-Q1 devices offer high electromagnetic immunity and low emissions at low power consumption while isolating different ground domains and block high-voltage/high-current transients from sensitive or human interface circuitry. Each isolation channel has a logic input and output buffer separated by capacitive silicon dioxide (SiO2) insulation barrier, the integrated Schmitt trigger on each input provide excellent noise immunity in automotive applications.
The CA-IS374x-Q1 family offers all possible unidirectional channel configurations to accommodate any 4-channel design, including SPI, RS-485, and digital I/O applications. The CA-IS3740-Q1 features 4 channels transferring digital signals in one direction and output enable for the B side is active-high. The CA-IS3741-Q1 device has three forward and one reverse-direction channels, making it ideal for applications such as isolated SPI, RS-485 communication.
The CA-IS3742-Q1 provides further design flexibility with two channels in each direction for isolated RS-232 or other applications. Both CA-IS3741-Q1 and CA-IS3742-Q1 come with individual enable control pins for each side of the isolator which can be used to put the outputs in high impedance for multi-master driving applications to reduce power consumption.
The CA-IS374x-Q1 family features default outputs. When the input is either not powered or is open-circuit, the default output is low for devices with suffix L and high for devices with suffix H, see the Ordering Information for suffixes associated with each option.
The CA-IS374x-Q1 family devices are specified over the – 40°C to +125°C operating temperature range and are available in 16-pin SOIC wide body package.

Data rate: DC to 150Mbps
Robust isolation barrierHigh lifetime: >40 years
Robust isolation barrierUp to 5000 VRMS isolation rating
Robust isolation barrier±150 kV/μs typical CMTI
Schmitt Trigger Inputs
Enable Control Input with Internal Pull-up
Default output High (CA-IS372xL-Q1) and Low (CAIS372xH-Q1) Options
No start-up initialization required
No Start-Up Initialization Required
Low power consumption1.5mA per channel at 1Mbps with VDD = 5.0V
Low power consumption6.6mA per channel at 100Mbps with VDD = 5.0V
Best in class propagation delay and skew12ns typical propagation delay
Best in class propagation delay and skew2ns propagation delay skew (chip -to-chip)
Best in class propagation delay and skew1ns pulse width distortion
Best in class propagation delay and skew5ns minimum pulse width
Package optionsNarrow-body SOIC16-NB(N) package
Package optionsNarrow-body SSOP16-NB(B)
Package options Wide-body SOIC16(W) package
Safety regulatory approvals VDE 0884-11 isolation certification
Safety regulatory approvals UL according to UL1577
Safety regulatory approvals IEC 62368-1, IEC 61010-1, GB 4943.1-2011 and GB 8898-2011 certifications
AEC-Q100 qualified for automotive applicationGrade 1 operating temperature range: -40°C to 125°C
AEC-Q100 Qualified for Automotive Application Grad 1 operating temperature range: -40°C to 125°C
  • Industrial Automation
  • Automotive
  • Medical Systems
  • Isolated Power Supplies
  • Isolated RS485, CAN, RS232 etc.
Device information
Part Number PackagePackage Size (NOM)
SOIC16-WB(W)10.30 mm × 7.50 mm
Simplified Channel Structure

Technical Documentation



Last Updated

Certification Standards



Certification Number


Core Values:

Our Goals:


WeChat MP
WeChat Video