Silicon Lab's family of digital isolators are CMOS devices that employ an RF coupler to transmit digital information across an isolation barrier. The patent-pending Si844x uses chip-scale transformers fabricated in standard, 100 percent CMOS to deliver a highly integrated, four channel isolator that is one-third the size of competing opto-coupler solutions.

The Si844x offers 50 percent faster data rates than existing digital isolators and consumes less than 12 mA per channel at 100 Mbps, making it ideal for applications such as switch mode power supplies, Ethernet/CAN networks and isolated analog data acquisition. The product family includes the four-channel Si8440, Si8441 and the Si8442, all of which are offered in a 16-pin wide-body small outline IC package (SOIC).

The Si8440 offers four forward channels while the Si8441 offers three forward channels and one reverse channel, and the Si8442 offers two forward channels and two reverse channels. Three speed grade options (1, 10, 100 Mbps) are available over the full temperature range and achieve typical propagation delay of less than 10 ns.