ISO7421E - Low-Power Dual Channel Digital Isolators

ISO742x provide galvanic isolation up to 2500 V_RMS for 1 minute per UL and 4242 V_PK per VDE. These devices have two isolated channels. Each channel has a logic input and output buffer separated by a silicon dioxide (SiO₂) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging sensitive circuitry. ISO7420 has both channels in the same direction while ISO7421 has the two channels in opposite direction. In case of input power or signal loss, default output is 'low' for devices with suffix 'F' and 'high' for devices without suffix 'F'. ISO742x have no integrated noise filter and thus have fast propagation delays.

These devices have TTL input thresholds and operate from 3-V to 5.5-V supplies. All inputs are 5-V tolerant when supplied from a 3.3-V supply.

Products containing the "ISO7421E" keyword are: ISO7421ED , ISO7421ED , ISO7421EDR , ISO7421EDR , ISO7421EDRG4 , ISO7421EQDWRQ1 , ISO7421EQDWRQ1

• Signaling Rate > 50 Mbps
• Default Output 'High' and 'Low' Options
• Low Power Consumption: Typical I_CC per Channel (3.3-V Supplies):
  • ISO7420: 1.4 mA at 1 Mbps, 2.5 mA at 25 Mbps
  • ISO7421: 1.8 mA at 1 Mbps, 2.8 mA at 25 Mbps
• Low Propagation Delay: 7 ns Typical
• Low Pulse Skew: 200 ps Typical
• Wide T_A Range Specified: –40°C to 125°C
• 50-KV/μs Transient Immunity, Typical
• Isolation Barrier Life: > 25 Years
• Operates from 3-V to 5.5-V Supply Levels
• 3.3-V and 5-V Level Translation
• Narrow Body SOIC-8 Package
• Safety and Regulatory Approvals:
  • 4242 V_PK Isolation per DIN V VDE V 0884-10 and DIN EN 61010-1
  • 2500 V_RMS Isolation for 1 minute per UL 1577
  • CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 Standards
  • CQC Certification per GB4943.1-2011

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