Active production — still a current BOM line
That means it's still a valid line-item for new builds and replacement orders, not a part you need to chase through surplus channels. One catch worth flagging: the UC2842P is RoHS non-compliant, so it carries the legacy tin/lead finish. If your assembly line is RoHS-exempt (military, aerospace, or medical with an exemption) this is fine; if you need full RoHS compliance, you'll want the lead-free variant.
What the switching controller does — and the topologies it handles
The UC2842P is a current-mode PWM controller that drives an external transistor switch — it's the brains, not the power stage. It supports Boost, Buck, Buck-Boost, Flyback, and Forward topologies, which covers a wide range of isolated and non-isolated DC-DC converters. Switching frequency goes up to 500 kHz. At that speed the magnetics shrink — a flyback transformer for a 100 kHz design is noticeably smaller than one running at 50 kHz. The 97% max duty cycle is generous enough for most flyback and forward designs where you need a long on-time to transfer energy. Supply voltage range is 12 V to 28 V, which suits offline flyback converters (rectified mains through a startup resistor) or industrial 24 V rails. The output configuration is Positive, Isolation Capable — meaning you can use it with an optocoupler or transformer feedback for galvanic isolation.
Through-hole 8-DIP — breadboard and bench friendly
The UC2842P comes in an 8-DIP (0.300", 7.62mm) through-hole package, supplier device package 8-PDIP. That 0.100-inch pin pitch fits standard perfboard and breadboards — you can prototype this on a solderless breadboard without an adapter. That's industrial grade — fine for a benchtop supply, an industrial control board, or an outdoor telecom enclosure. Not rated for under-hood automotive, but the -40°C low end covers cold-start scenarios.
The UC2842P is sourced through independent distribution channels. No stock-holding claim — we quote per RFQ.