1 Features

• 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 V_PK Basic Insulation per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
  • 2.5 kV_RMS Insulation for 1 minute per UL 1577
  • CSA Component Acceptance Notice #5A and IEC 60950-1 End Equipment Standard

2 Applications

• Industrial Fieldbus
• Computer Peripheral Interface
• Servo Control Interface
• Data Acquisition

3 Description

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.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

V_CCI and GNDI are supply and ground connections respectively for the input channels.

V_CCO and GNDO are supply and ground connections respectively for the output channels.