Re: Equivalent NPN Transistor for 8560E
¿ªÔÆÌåÓýTook a little amount of sleuthing, but I f you search for pxt2222a115 it appears to be an ordinary 2222 variant. The tab, opposing middle pin and ¡°heatsink¡± are all one pin; the collector.?
Here¡¯s an Octopart link, and you can get them on eBay too:
https://datasheet.octopart.com/PXT2222A%2C115-Nexperia-datasheet-87582290.pdf
-d
? From: [email protected] on behalf of Dave Ireland <mirrors@...>
Sent: Monday, April 8, 2019 5:31 AM To: [email protected] Subject: [HP-Agilent-Keysight-equipment] Equivalent NPN Transistor for 8560E ?
Tracked down the fault in a 8560E to failure of the regulator transistor in the 100Mhz VCXO. Substituted the supply and the oscillator circuit is drawing little current so I am not sure why it would have failed except there is evidence someone changed the crystal so might have been their fault. The transistor is listed is a 1854-1094 or manufacturer part number PTX2222A. Google this results in a lot of Japanese and NPN thrown in the mix. The Equivalents List says it is a MTX2222A which is also a mystery. I am assuming it is a SMD style 2N2222A but the under body solder pad with the 4 legs has me a bit concerned it might be something special. Anyone know this device? ? ?
Dave |
Doug Bercich