SLLSF40B November   2017  – September 2019 ISOW7821

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Schematic
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Power Ratings
    6. 7.6  Insulation Specifications
    7. 7.7  Safety-Related Certifications
    8. 7.8  Safety Limiting Values
    9. 7.9  Electrical Characteristics—5-V Input, 5-V Output
    10. 7.10 Supply Current Characteristics—5-V Input, 5-V Output
    11. 7.11 Electrical Characteristics—5-V Input, 3.3-V Output
    12. 7.12 Supply Current Characteristics—5-V Input, 3.3-V Output
    13. 7.13 Electrical Characteristics—3.3-V Input, 3.3-V Output
    14. 7.14 Supply Current Characteristics—3.3-V Input, 3.3-V Output
    15. 7.15 Switching Characteristics—5-V Input, 5-V Output
    16. 7.16 Switching Characteristics—5-V Input, 3.3-V Output
    17. 7.17 Switching Characteristics—3.3-V Input, 3.3-V Output
    18. 7.18 Insulation Characteristics Curves
    19. 7.19 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Electromagnetic Compatibility (EMC) Considerations
      2. 9.3.2 Power-Up and Power-Down Behavior
      3. 9.3.3 Current Limit, Thermal Overload Protection
    4. 9.4 Device Functional Modes
      1. 9.4.1 Device I/O Schematics
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curve
        1. 10.2.3.1 Insulation Lifetime
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 PCB Material
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Development Support
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.4 Device Functional Modes

Table 2 lists the supply configurations for these devices.

Table 2. Supply Configurations

SEL INPUT VCC VISO
Shorted to VISO 5 V 5 V
Shorted to GND2 or floating 5 V 3.3 V
Shorted to GND2 or floating 3.3 V(1) 3.3 V(2)
(1) VCC = 3.3 V, SEL shorted to VISO (essentially VISO = 5 V) is not recommended mode of configuration.
(2) The SEL pin has a weak pulldown internally. Therefore for VISO = 3.3 V, the SEL pin should be strongly connected to the GND2 pin in noisy system scenarios.

Table 3 lists the functional modes for ISOW7821 device.

Table 3. Function Table(1)

INPUT SUPPLY
(VCC)		 INPUT
(INx)		 OUTPUT
(OUTx)		 COMMENTS
PU H H Output channel assumes the logic state of its input
L L
Open Default Default mode(2): When INx is open, the corresponding output channel assumes logic based on default output mode of selected version
PD x Undetermined(3)
(1) PU = Powered up (VCC ≥ 2.7 V); PD = Powered down (VCC < 2.1 V); X = Irrelevant; H = High level; L = Low level, VCC = Input-side supply
(2) In the default condition, the output is high for ISOW7821 and low for ISOW7821 with the F suffix.
(3) The outputs are in an undetermined state when VCC < 2.1 V.