General Description

The CS817x20/CS817x22 family of ultra-low-power digital isolators used Chipanalog’s “Pulse-Coding” capacitive isolation technology, offering as low as 90μA per channel low quiescent current. These isolated CMOS-compatible digital I/Os feature up to 3kVRMS isolation rating and ±150  kV/μs typical CMTI, providing high electromagnetic immunity and low EMI. All device versions have Schmitt trigger inputs for high noise immunity and each isolation channel has a logic input and output buffer separated by capacitive silicon dioxide (SiO2) insulation barrier, only requiring two VDD_ bypass capacitors to build a digital signal isolation solution. 

The CS817x20/CS817x22 family of devices offers all possible unidirectional channel configurations to accommodate 2-channel design digital I/O applications. The CS817x20HS and CS817x20LS feature 2 channels transferring digital signals in one direction; The  CS817x22HS and CS817x22LS devices have one forward and one reverse-direction channel. All devices of this family feature default outputs. When the input is either not powered or is open-circuit, the default output is low for devices with the suffix LS and high for devices with the suffix  HS, see the Ordering Information for suffixes associated with each option.