Other Parts Discussed in Thread: SN55453B
Tool/software:
Good afternoon. We have been using SN75453B for more than 10 years. The total number of installed chips is more than 50,000 pcs.
The total failure rate did not exceed 1%.
In one of the batches we had 3 pcs of SN75453B fail in a row. Our quality engineers conducted an investigation and made a conclusion that the cause of failure is the mismatch of SN75453B (0 ...+70*C) to the temperature mode of our product (-40....+85*C) according to the documents. The real temperature at which the chip worked is -20...+85*C.
We tried to find analogs of this chip with a wider temperature range. But the search was not successful, because analogs, for example, SN55453B, can not be bought. Other variants require redesigning the printed circuit boards of the blocks and software. We use the SN75453B as an opto-transmitter driver, 5V supply and 50mA operating current. The baud rate is 5 MHz.
This raises a question for us. Maybe you can suggest analogs with the right temperature range. Or do you have any information on SN75453B - when exceeding its declared range, it fails? Or just loses its technical parameters, such as output current level or timing characteristics. Thanks
