This module is a carrier board for TI’s ISO6521 general purpose functional isolator, which enables two channels of galvanically isolated digital communication between two devices at up to 50 Mbps per channel. It provides one forward channel and one reverse channel, and they default to high in the event of input power or signal loss.

These modules are carrier boards or breakout boards for the ISO652x general purpose functional isolators from Texas Instruments; we therefore recommend referring to the ISO652x datasheet for detailed specifications. The ISO652x features two digital channels that enable communication between two galvanically (electrically) isolated devices at up to 50 Mbps per channel. This isolation means that current cannot flow from one side to the other, and incorrect connections or bad voltages on one side cannot propagate through to damage the device on the other side. It also means the logic voltage can be at different levels on the two sides, allowing these carrier boards to function as level shifters.

Details for item #5748

This version features the ISO6521, which has one forward channel and one reverse channel and defaults to high in the event of input power or signal loss. It can be differentiated from the other versions by the “6521” marking on the IC.

Each side must be powered separately across its respective VCCx and GNDx pins, and the voltages on the two sides can be at different levels. The two sides are galvanically isolated (GND1 is NOT connected to GND2).

Isolation rating and board creepage considerations

The ISO652x provides functional isolation with a manufacturer-rated working voltage of 450 VRMS. The IC package has a clearance and creepage of >2.2 mm, and our carrier PCB has a routed slot under the IC to provide a PCB creepage distance of 2.8 mm. A rough rule of thumb is that uncontaminated FR4 PCBs should have roughly 1 mm of creepage per 100 VRMS of isolation. Please note that these carrier boards are not certified to any particular safety standard.

Dimensions

• Size : 0.4″ × 0.4″ × 0.11″
• Weight : 0.2 g

Specifications:

• Maximum data rate : 50 Mbps
• Minimum operating voltage : 1.71 V1
• Maximum operating voltage : 5.5 V1
• Channel directions : 1 forward, 1 reverse
• Default output : high
• Working isolation voltage : 450 VRMS2
• IC part number : ISO65213

Package Includes:

• 1 x Pololu 5748 ISO6521 2-Channel Digital Isolator Carrier, 1/1, Default High, Functional Isolation