Features
1) Built-in bias resistors enable the configuration of
   an inverter circuit without connecting external
   input resistors.
2) The bias resistors consist of thin-film resistors
   with complete isolation to allow positive biasing
   of the input, and parasitic effects are almost
   completely eliminated.
3) Only the on / off conditions need to be set for
   operation, making device design easy.
4) Higher mounting densities can be achieved.