This module is a carrier board for TI’s ISO6542F general purpose functional isolator, which enables four channels of galvanically isolated digital communication between two devices at up to 50 Mbps per channel. It provides two forward channels and two reverse channels, and they default to low in the event of input power or signal loss.

These modules are carrier boards or breakout boards for the ISO654x general purpose functional isolators from Texas Instruments; we therefore recommend referring to the ISO654x datasheet for detailed specifications. The ISO654x features four 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 #5743

This is the version features the ISO6542F, which has two forward channels and two reverse channels and defaults to low in the event of input power or signal loss. It can be differentiated from the other versions by the “6542F” marking on the IC, and there is also a blank white rectangle on the bottom silkscreen for adding your own distinguishing marks.

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 ISO654x provides functional isolation with a manufacturer-rated working voltage of 400 VRMS. The IC package has a clearance and creepage of >3.7 mm, and our carrier PCB has a routed slot under the IC that increases the PCB creepage to 5.3 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.

Specfications

• Maximum data rate : 50 Mbps
• Minimum operating voltage : 1.71 V1
• Maximum operating voltage : 5.5 V1
• Channel directions : 3 forward, 1 reverse
• Default output : low
• Working isolation voltage : 400 VRMS
• IC part number : ISO6541F 

Pacakage Includes

• 1 x Pololu 5743 ISO6541F 4-Channel Digital Isolator Carrier, 3/1, Default Low, Functional Isolation