SLLSFC2D December 2020 – September 2021 ISO1640 , ISO1641 , ISO1642 , ISO1643 , ISO1644
PRODUCTION DATA
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Power Ratings
- 6.6 Insulation Specifications
- 6.7 Safety-Related Certifications
- 6.8 Safety Limiting Values
- 6.9 Electrical Characteristics
- 6.10 Supply Current Characteristics
- 6.11 Timing Requirements
- 6.12 I2C Switching Characteristics
- 6.13 GPIO Switching Characteristics
- 6.14 Insulation Characteristics Curves
- 6.15 Typical Characteristics
- 7 Parameter Measurement Information
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
8.4.3 GPIO Channels
The ISO1642, ISO1643 and ISO1644 intregrate unidirectional isolation channels, in addition to the bidirectional isolated I2C lines, to support system signals. The ISO1642 includes two channels in opposing directions (1/1 configuration) and the ISO1643 include two channels in the same direction (2/0 configuration). The ISO1644 includes three GPIO channels, two in one direction and one in the opposite direction (2/1 configuration) making it possible to use with a Serial Peripheral Interface (SPI). The conceptual block diagram of a unidirectional digital capacitive isolator channel is shown in Figure 8-3.
Figure 8-3 Conceptual Block Diagram of the GPIO Channels