SN74HCS244: Required Spice model

Hi Vanitha, 

You can get the model from the automotive device here: https://www.ti.com/product/SN74HCS244-Q1?keyMatch=hcs244&tisearch=universal_search&usecase=partmatches 

For LV138, we do not have a model for this. 

For AM26C32, please go ask the correct product line. This is not a logic device.