The threshold voltages are a bit different but otherwise, they are roughly
equivalent. Where things fall apart is when you try to kluge a digital part
for an analog function. There they have big differences.

"mark krawczuk" wrote in message
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hi, i`m trying to build a bdm32 interface to program my saab trionic ecu
, put the parts list is for hc ttl ic`s , i have ls ttl ic`s , are these
interchangable ?
thanks,
mark k