ACPL-021L Datasheet, AVAGO

* CMOS output
* Wide supply voltage: 2.7 V
  – 5.5 V
* Low power supply current IDD: ≤ 1.1 mA max
* Low forward current IF: 1.6 mA min <.

* Low isolation of high speed logic systems
* Computer peripheral interface VDD V01 V02 GND ACPL-M21L NC Anod.

ACPL-M21L (single channel SO-5 package), ACPL-021L (single channel SO-8 package) and ACPL-024L (dual channel SO-8 package) are optically-coupled logic gates. The detector IC has CMOS output stage and optical receiver input stage with built-in Schmitt.