1.10 Solid State Relay

The HT0440 technology allows multiple channel drives to be integrated into a monolithic IC. The 2 channel HT0440 has galvanic ±400V isolation between the outputs and logic inputs, and ±700V isolation between output channels. The HT0440 driver along with the MOSFET switches is analogous to a relay. The HT0440 will drive both depletion-mode and enhancement mode bidirectional MOSFETs, thereby giving either normally open or normally closed “contacts.” The low profile SO-8 surface mount HT0440 gives this solution an added advantage over the single channel high profile opto packages and is also lower in cost.