Answering question for Optocoupler - XVive, VTL5C1, Vactrol, for Channel Switching

Product:
Optocoupler - XVive, VTL5C1, Vactrol, for Channel Switching

Question:
the data sheet shows two devices with very different specs. The VTL5C1 and the VTL5C2. WHich one is this? It matters a lot.