1 Features

• Maximum Signaling Rate: 50 Mbps (With 5-V Supplies)
• Robust Design With Integrated Noise Filter
• Default Output Low Option (Suffix F)
• Low Power Consumption, Typical I_CC per Channel (With 3.3-V Supplies):
  • ISO7131: 1.5 mA at 1 Mbps,
    2.6 mA at 25 Mbps
  • ISO7140: 1 mA at 1 Mbps,
    2.3 mA at 25 Mbps
  • ISO7141: 1.3 mA at 1 Mbps,
    2.6 mA at 25 Mbps
• Low Propagation Delay: 23-ns Typical
  (3.3-V Supplies)
• Wide Temperature Range: –40°C to 125°C
• 50-kV/µs Transient Immunity, Typical
• Long Life With SiO₂ Isolation Barrier
• Operates from 2.7-V, 3.3-V, and 5-V Supply and Logic Levels
• Small QSOP-16 Package
• Safety and Regulatory Approvals
  • 2500-V_RMS Isolation for 1 minute per UL 1577
  • 4242-V_PK Isolation per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12, 566 V_PK Working Voltage
  • CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 End Equipment Standards
  • CQC Certification per GB 4943.1-2011

2 Applications

• General-Purpose Isolation
  • Industrial Fieldbus
    • Profibus
    • Modbus™
    • DeviceNet Data Buses
  • RS-232, RS-485
  • Serial Peripheral Interface

3 Description

ISO7131, ISO7140, and ISO7141 devices provide galvanic isolation up to 2500 V_RMS for 1 minute per UL and 4242 V_PK per VDE. ISO7131 has three channels with two forward and one reverse-direction channels. ISO7140 and ISO7141 are quad-channel isolators; ISO7140 has four forward channels, ISO7141 has three forward and one reverse-direction channels. These devices are capable of 50-Mbps maximum data rate with 5-V supplies and 40-Mbps maximum data rate with 3.3-V or 2.7-V supplies, with integrated filters on the inputs for noise-prone applications. The suffix F indicates that default output state is low; otherwise, the default output state is high (see Table 3).

Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO₂) insulation barrier. Used with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. The devices have TTL input thresholds and can operate from 2.7-V, 3.3-V, and 5-V supplies. All inputs are 5-V tolerant when supplied from a 2.7-V or 3.3-V supply.

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

Simplified Schematic