ISO7741 High-speed, low-power, robust EMC quad-channel digital isolator | TI.com

ISO7741
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High-speed, low-power, robust EMC quad-channel digital isolator

 

Description

The ISO774x devices are high-performance, quad-channel digital isolators with 5000 VRMS (DW package) and 3000 VRMS (DBQ package) isolation ratings per UL 1577. This family of devices has reinforced insulation ratings according to VDE, CSA, TUV and CQC.

The ISO774x devices provide high electromagnetic immunity and low emissions at low power consumption, while isolating CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by a double capacitive silicon dioxide (SiO2) insulation barrier. This device comes with enable pins which can be used to put the respective outputs in high impedance for multi-master driving applications and to reduce power consumption. The ISO7740 device has all four channels in the same direction, the ISO7741 device has three forward and one reverse-direction channels, and the ISO7742 device has two forward and two reverse-direction channels. If the input power or signal is lost, default output is high for devices without suffix F and low for devices with suffix F. See the Device Functional Modes section for further details.

Used in conjunction with isolated power supplies, these devices help prevent noise currents on data buses, such as RS-485, RS-232, and CAN, or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. Through innovative chip design and layout techniques, electromagnetic compatibility of the ISO774x devices have been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO774x devices are available in 16-pin SOIC and QSOP packages.

Features

  • 100 Mbps data rate
  • Robust isolation barrier:
    • >100-year projected lifetime at 1500 VRMS working voltage
    • Up to 5000 VRMS isolation rating
    • Up to 12.8 kV surge capability
    • ±100 kV/µs typical CMTI
  • Wide supply range: 2.25 V to 5.5 V
  • 2.25-V to 5.5-V level translation
  • Default output high (ISO774x) and low (ISO774xF) options
  • Wide temperature range: –55°C to 125°C
  • Low power consumption, typical 1.5 mA per channel at 1 Mbps
  • Low propagation delay: 10.7 ns typical
    (5-V Supplies)
  • Robust electromagnetic compatibility (EMC)
    • System-level ESD, EFT, and surge immunity
    • ±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier
    • Low emissions
  • Wide-SOIC (DW-16) and QSOP (DBQ-16) Package Options
  • Automotive version available: ISO774x-Q1
  • Safety-related certifications:
    • DIN V VDE V 0884-11:2017-01
    • UL 1577 component recognition program
    • CSA component acceptance notice 5A, IEC 60950-1 and IEC 60601-1 end equipment standards
    • CQC approval per GB4943.1-2011
    • TUV certification according to EN 60950-1 and EN 61010-1
    • All certifications complete

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Parametrics

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Part number Order Integrated isolated power Number of channels (#) Forward/reverse channels Isolation rating (Vrms) Surge voltage capability (Vpk) Data rate (Max) (Mbps) Current consumption per channel (DC) (Typ) (mA) Current consumption per channel (1 Mbps) (Typ) (mA) Propagation delay (Typ) (ns) Default output VCC (Min) (V) VCC (Max) (V) Rating Operating temperature range (C)
ISO7741 Order now No     4     3/1     5000
3000    
12800
6400    
100     0.88     1.48     10.7     High
Low    
2.25     5.5     Catalog     -55 to 125    
ISO7740 Order now No     4     4/0     5000
3000    
12800
6400    
100     0.78     1.38     10.7     High
Low    
2.25     5.5     Catalog     -55 to 125    
ISO7742 Order now No     4     2/2     5000
3000    
12800
6400    
100     0.72     1.45     10.7     High
Low    
2.25     5.5     Catalog     -55 to 125