How to tell if TDA7293 is fake?

Discussion created by ho.roger.001 on Feb 18, 2017
Latest reply on Nov 2, 2017 by STEPHEN MARTELL

As I know there are some TDA7293 fake chips remarked from TDA7294. 

I got the tip how to verify if the chip is fake:


multimeter test:
TDA7294 pin 11, pin 12 empty legs, open state is insulated
TDA7293 pin 11 (voltage amplification stage output), pin 12 (bootstrap) has a resistance:


Recently I bought two pieces of TDA7293. Can somebody tell me if the upper guide is true enough to tell if the chip is true TDA7293 or fake?