UC2843: Is the die exactly the same between UC2843 vs UC1843?

Haiming

Both die are exactly the same. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C. This means that the UC184x devices are able to meet all the parameters specified in the data sheet over a wider temperature range compared to UC284x devices.

Regards,

Steve M