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ISO7742 ACTIVE Robust EMC, quad-channel, 2/2, reinforced digital isolator Pin-to-pin upgrade with higher isolation, stronger CMTI, wider supply range and better immunity

Product details

Integrated isolated power No Number of channels (#) 4 Forward/reverse channels 2/2 Isolation rating (Vrms) 2500 Data rate (Max) (Mbps) 25 Rating Catalog Surge voltage capability (Vpk) 4000 Current consumption per channel (DC) (Typ) (mA) 3 Operating temperature range (C) -40 to 125 Default output High Supply voltage (Max) (V) 5 Supply voltage (Min) (V) 3.3 Propagation delay (Typ) (ns) 35
Integrated isolated power No Number of channels (#) 4 Forward/reverse channels 2/2 Isolation rating (Vrms) 2500 Data rate (Max) (Mbps) 25 Rating Catalog Surge voltage capability (Vpk) 4000 Current consumption per channel (DC) (Typ) (mA) 3 Operating temperature range (C) -40 to 125 Default output High Supply voltage (Max) (V) 5 Supply voltage (Min) (V) 3.3 Propagation delay (Typ) (ns) 35
SOIC (DW) 16 77 mm² 7.52 x 10.28
  • 25 and 150-Mbps Signaling Rate Options
    • Low Channel-to-Channel Output Skew;
      1 ns Maximum
    • Low Pulse-Width Distortion (PWD);
      2 ns Maximum
    • Low Jitter Content; 1 ns Typ at 150 Mbps
  • Selectable Default Output (ISO7240CF)
  • > 25-Year Life at Rated Working Voltage
    (see High-Voltage Lifetime of the ISO72x Family of Digital Isolators and Isolation Capacitor Lifetime Projection)
  • 4-kV ESD Protection
  • Operates With 3.3-V or 5-V Supplies
  • High Electromagnetic Immunity
    (see ISO72x Digital Isolator Magnetic-Field Immunity)
  • –40°C to +125°C Operating Temperature Range
  • Safety-Related Certifications:
    • VDE 4000 VPK Basic Insulation per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
    • 2.5 kVRMS Insulation for 1 minute per UL 1577
    • CSA Component Acceptance Notice #5A and IEC 60950-1 End Equipment Standard
  • 25 and 150-Mbps Signaling Rate Options
    • Low Channel-to-Channel Output Skew;
      1 ns Maximum
    • Low Pulse-Width Distortion (PWD);
      2 ns Maximum
    • Low Jitter Content; 1 ns Typ at 150 Mbps
  • Selectable Default Output (ISO7240CF)
  • > 25-Year Life at Rated Working Voltage
    (see High-Voltage Lifetime of the ISO72x Family of Digital Isolators and Isolation Capacitor Lifetime Projection)
  • 4-kV ESD Protection
  • Operates With 3.3-V or 5-V Supplies
  • High Electromagnetic Immunity
    (see ISO72x Digital Isolator Magnetic-Field Immunity)
  • –40°C to +125°C Operating Temperature Range
  • Safety-Related Certifications:
    • VDE 4000 VPK Basic Insulation per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
    • 2.5 kVRMS Insulation for 1 minute per UL 1577
    • CSA Component Acceptance Notice #5A and IEC 60950-1 End Equipment Standard

The ISO7240x, ISO7241x, and ISO7242x devices are quad-channel digital isolators with multiple channel configurations and output-enable functions. These devices have logic-input and logic-output buffers separated by Texas Instrument’s silicon-dioxide (SiO2) isolation barrier. Used in conjunction with isolated power supplies, these devices help block high voltage, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry.

The ISO7240x family of devices has all four channels in the same direction. The ISO7241x family of devices has three channels in the same direction and one channel in the opposition direction. The ISO7242x family of devices has two channels in each direction.

The devices with the C suffix (C option) have TTL input thresholds and a noise-filter at the input that prevents transient pulses from being passed to the output of the device. The devices with the M suffix (M option) have CMOS VCC/2 input thresholds and do not have the input noise filter or the additional propagation delay.

The ISO7240CF device has an input disable function on pin 7, and a selectable high or low failsafe-output function with the CTRL pin (pin 10). The failsafe output is a logic high when a logic high is placed on the CTRL pin or it is left unconnected. If a logic low signal is applied to the CTRL pin, the failsafe output becomes a logic-low output state. The input disable function of the ISO7240CF device prevents data from being passed across the isolation barrier to the output. When the inputs are disabled or VCC1 is powered down, the outputs are set by the CTRL pin.

These devices can be powered from 3.3-V or 5-V supplies on either side, in any combination. The signal input pins are 5-V tolerant regardless of the voltage supply level that is used.

These devices are characterized for operation over the ambient temperature range of –40°C to +125°C.

The ISO7240x, ISO7241x, and ISO7242x devices are quad-channel digital isolators with multiple channel configurations and output-enable functions. These devices have logic-input and logic-output buffers separated by Texas Instrument’s silicon-dioxide (SiO2) isolation barrier. Used in conjunction with isolated power supplies, these devices help block high voltage, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry.

The ISO7240x family of devices has all four channels in the same direction. The ISO7241x family of devices has three channels in the same direction and one channel in the opposition direction. The ISO7242x family of devices has two channels in each direction.

The devices with the C suffix (C option) have TTL input thresholds and a noise-filter at the input that prevents transient pulses from being passed to the output of the device. The devices with the M suffix (M option) have CMOS VCC/2 input thresholds and do not have the input noise filter or the additional propagation delay.

The ISO7240CF device has an input disable function on pin 7, and a selectable high or low failsafe-output function with the CTRL pin (pin 10). The failsafe output is a logic high when a logic high is placed on the CTRL pin or it is left unconnected. If a logic low signal is applied to the CTRL pin, the failsafe output becomes a logic-low output state. The input disable function of the ISO7240CF device prevents data from being passed across the isolation barrier to the output. When the inputs are disabled or VCC1 is powered down, the outputs are set by the CTRL pin.

These devices can be powered from 3.3-V or 5-V supplies on either side, in any combination. The signal input pins are 5-V tolerant regardless of the voltage supply level that is used.

These devices are characterized for operation over the ambient temperature range of –40°C to +125°C.

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Technical documentation

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Type Title Date
* Data sheet ISO724x High-Speed, Quad-Channel Digital Isolators datasheet (Rev. T) 19 Apr 2017
White paper Why are Digital Isolators Certified to Meet Electrical Equipment Standards? 16 Nov 2021
Application note Digital Isolator Design Guide (Rev. D) 15 Nov 2021
Certificate VDE Certificate for Basic Isolation for DIN VDE V 0884-11:2017-01 (Rev. S) 03 Aug 2021
Certificate CSA Certification (Rev. Q) 14 Jun 2021
White paper Distance Through Insulation: How Digital Isolators Meet Certification Requiremen 11 Jun 2021
User guide Universal Digital Isolator Evaluation Module 04 Mar 2021
Certificate UL Certification (Rev. O) 03 Feb 2021
White paper Improve Your System Performance by Replacing Optocouplers with Digital Isolators (Rev. A) 07 Dec 2020
Technical article How to select the right digital isolator for your design 21 Oct 2020
Technical article Why signal isolation matters in 48-V HEV/EV systems 20 Nov 2019
Technical article Staying on budget: How digital isolators are transforming field transmitters 24 May 2019
Technical article What are isolated digital inputs? 08 Mar 2019
Analog design journal 4Q 2011 Issue Analog Applications Journal 09 Nov 2011
Analog design journal Extending the SPI bus for long-distance communication 09 Nov 2011
User guide Triple- and Quad-Channel Digital Isolator EVM (Rev. A) 27 Sep 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

DIGI-ISO-EVM — Universal digital isolator evaluation module

DIGI-ISO-EVM is an evaluation module (EVM) used to evaluate any of the TI single-channel, dual-channel, triple-channel, quad-channel or six-channel digital isolator devices in five different packages - 8-pin narrow-body SOIC (D), 8-pin wide-body SOIC (DWV), 16-pin wide-body SOIC (DW), 16-pin ultra- (...)

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Evaluation board

ISO723X724XEVM — ISO723X724XEVM Evaluation Module

The ISO723X724X evaluation module (EVM) supports the rapid, parametric evaluation of the Triple and Quad Digital Isolators. The EVM will be delivered with an ISO7241C soldered on the board. If another device is desired, please order samples from www.ti.com. If you do not have the capability to (...)

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Development kit

TIEVM-HV-1PH-DCAC — Single phase inverter development kit with voltage source and grid connected modes

This reference design implements single phase inverter (DC-AC) control using the C2000™ F2837xD and F28004x microcontrollers. Design supports two modes of operation for the inverter. First is voltage source mode using an output LC filter, this control mode is typically used in Uninterrupted (...)
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Simulation model

ISO7242 IBIS Model (Rev. D)

SLLC347D.ZIP (13 KB) - IBIS Model
Reference designs

TIDM-HV-1PH-DCAC — Single-Phase Inverter Reference Design With Voltage Source and Grid Connected Modes

This reference design implements single-phase inverter (DC-AC) control using the C2000™ F2837xD and F28004x microcontrollers. Design supports two modes of operation for the inverter. First is the voltage source mode using an output LC filter. This control mode is typically used in (...)
Reference designs

TIDM-02000 — Peak current-mode controlled phase-shifted full-bridge reference design using C2000™ real-time MCU

This design implements a digitally peak current mode controlled (PCMC) phase shifted full bridge (PSFB) DC-DC converter which converts a 400-V DC input to a regulated 12-V DC output. Novel PCMC waveform generation based on type-4 PWM and internal slope compensation, and simple PCMC implementation (...)
Reference designs

TIDM-BIDIR-400-12 — Bidirectional 400-V/12-V DC/DC Converter Reference Design

The Bidirectional 400V-12V DC/DC Converter Reference Design is a microcontroller-based implementation of an isolated bi-directional DC-DC converter.  A phase shifted full-bridge (PSFB) with synchronous rectification controls power flow from a 400V bus/battery to the 12V battery in step-down (...)
Reference designs

TIDM-RGB-LED — Multi-String RGB LED Lighting Driver based on C2000™ MCU

Ideal for automotive, entertainment, retail, and decorative lighting applications, the Multi-String RGB LED Lighting design implements independent multi-string LED control with dimming and color mixing. The LED driver consists of 8 independent and digitally controlled DC/DC power converters driving (...)
Reference designs

TIDM-DCDC-LED — Multi-String LED Lighting Driver based on C2000™ MCU Reference Design

Ideal for automotive, outdoor, entertainment, retail, and decorative lighting applications, the Multi-String LED Lighting design implements independent multi-string LED lighting with high resolution dimming. The LED driver consists of a microcontroller-controlled DC/DC Sepic Power stage and eight (...)
Reference designs

TIDM-AC-LED-COM — AC-mains LED Lighting with DALI DMX512 & Power Line Communications Reference Design

Ideal for outdoor, entertainment, and industrial lighting applications, this LED Lighting design provides high power and high efficiency illumination with built-in communications networking. The lighting unit consists of a 250W universal AC-input LED driver power supply and a demonstrational (...)
Reference designs

TIDM-SOLAR-DCDC — C2000™ Solar DC/DC Converter with Maximum Power Point Tracking (MPPT)

This design is a digitally-controlled, solar DC/DC converter with maximum power point tracking (MPPT), for use in central or string solar inverters. It is a companion to TIDM-SOLAR-ONEPHINV, a grid-tied, single phase, DC/AC inverter. Together, TIDM-SOLAR-DCDC and TIDM-SOLAR-ONEPHINV comprise (...)
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