SLLT217B July 2022 – November 2025 ISO6421 , ISO6441 , ISO6521 , ISO6742
Design Considerations
Example UART Isolation Block Diagram- Prevents DC and unwanted AC currents between controller devices and peripheral ICs
- Allows signal and power transfer between controller devices and peripheral ICs
- Protects low voltage parts in a system from high voltage circuits
- Diminishes the effect of ground potential difference
- [FAQ] What is the difference between basic and reinforced digital isolators?
- [FAQ] Can I power the two sides of a digital isolator with different voltages?
- Digital Isolator Design Guide
- Understanding Functional Isolation
- Top Design Questions About Digital Isolators
- Need additional assistance? Ask our engineers a question on the TI E2E™ Isolation Support Forum
Recommended Parts
| Part Number | AEC-Q100 | Supported UART Topology | Voltage Range | Data Rate | Features |
|---|---|---|---|---|---|
| ISO6521 | 2-wire | 1.71 - 5.5V | 50Mbps | High CMTI Functional Isolation with small footprint for compact design |
|
| ISO6421 | 2-wire | 2.25 - 5.5V | 150Mbps | High CMTI Reinforced and basic isolation Cost Optimised |
|
| ISO6421-Q1 | ✓ | ||||
| ISO6442 | 4-wire | ||||
| ISO6442-Q1 | ✓ | ||||
| ISO6721 | 2-wire | 1.71- 5.5V | 50Mbps | High CMTI Reinforced and basic isolation General Purpose |
|
| ISO6721-Q1 | ✓ | ||||
| ISO6742 | 4-wire | ||||
| ISO6742-Q1 | ✓ | ||||
| ISO7021 | 2-wire | 1.71 - 5.5V | 4Mbps | Ultra-low power | |
| ISO7821 | 2.25 - 5.5V | 100Mbps | Extra-wide creepage and clearance package |
For more devices, browse through the online parametric tool where you can sort by desired voltage, channel numbers, and other features.