The UC2842AD8: No last-time-buy window or obsolescence notice is in effect. ROHS3 compliant per the manufacturer's listing, which covers the full RoHS exemption set — no additional compliance paperwork needed for EU-market builds.
Current-mode control loop — what the ratings drive
As a current-mode PWM controller, the UC2842AD8 regulates the peak inductor current each cycle rather than just the output voltage — this gives inherent cycle-by-cycle current limiting and a simpler compensation network compared to voltage-mode controllers. The 96% maximum duty cycle is unusually high — useful for flyback converters with a wide input range or boost converters where the output is several times the input voltage, since the controller can keep the switch on for nearly the whole cycle without skipping pulses.
Industrial temperature and package — board-fit considerations
The 8-pin SOIC is a common footprint shared across many TI PWM controllers, so a layout designed for one often accepts the other with minor pinout checks. Output configuration is Positive, Isolation Capable — meaning the error amplifier reference is tied to ground, so the feedback loop can be referenced to the primary-side ground in an isolated flyback or forward converter without a separate bias winding for the controller.