Yeah, I was using a 30 dBm, L-band part that they discontinued, and had to redesign a PA section. Didn't HP acquire Avantek back in the 90's? I used to use a bunch of ATF-xxx parts.
Discontinued parts also included passive parts originally made by the HP Components subsidiary from the 1980s, such as special Schottky diodes and PIN diodes for RF/microwave applications, up to 10 GHz, still perfectly working today. For example, HP's jelly-bean HSMS‑282x series 6 GHz Schottky diodes was the go-to choice in RF circuits (even at lower frequencies like VHF and UHF) for three decades and still in production as of 2016 - you can find their datasheets with an HP logo, another with an Agilent logo, another with an Avago logo, and the last one with a Broadcom logo - and they eventually came to an end when Broadcom killed them in 2017 after Avago's acquisition.
I was hit by this. On a recent weekend I was tinkering with a DIY software-defined amateur radio receiver design and needed some RF diodes, only to find all of them have been killed, and similar parts from NXP were not stocked by the local distributor, 10-day shipping... A friend told me that they have switched to Skyworks diodes since then. The legendary life and unfortunate death of HP diodes.
