AST3TQ53-T-20.000MHz-2-C AST3TQ53-T-20.000MHz-2-C-T2 AST3TQ53-T-20.000MHZ-2-C-T5 AST3TQ53-T-20.000MHZ-2-SW AST3TQ53-T-20.000MHz-2-SW-T2 AST3TQ53-T-20.000MHz-2-SW-T5 AST3TQ53-T-20.000MHz-5-C AST3TQ53-T-20.000MHz-5-C-T2 AST3TQ53-T-20.000MHZ-5-C-T5 AST3TQ53-T-20.000MHZ-5-SW