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ISO7420FEDR

Digital Isolators Lo-Pwr Dual Channel Dig Iso

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Overview of ISO7420FEDR

ISO742x provide galvanic isolation up to 2500 VRMS for 1 minute per UL and 4242 VPK 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.

Key Features

  • Signaling Rate > 50 Mbps
  • Default Output 'High' and 'Low' Options
  • Low Power Consumption: Typical ICC 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 TA 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 VPK Isolation per DIN V VDE V 0884-10 and DIN EN 61010-1
    • 2500 VRMS 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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Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Rating Catalog Integrated isolated power No
Isolation rating Basic Number of channels 2
Forward/reverse channels 2 forward / 0 reverse Default output Low
Data rate (max) (MBps) 50 Surge isolation voltage (VIOSM) (VPK) 4000
Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 2500
CMTI (min) (V/µs) 25000 Operating temperature range (°C) -40 to 125
Supply voltage (max) (V) 5 Supply voltage (min) (V) 3.3
Propagation delay time (typ) (µs) 0.007 Current consumption per channel (DC) (typ) (mA) 1.4
Current consumption per channel (1 Mbps) (typ) (mA) 1.4 Creepage (min) (mm) 4
Clearance (min) (mm) 4

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