Upb8224 datasheet 2n3904


Features, Applications: NPN silicon planar switching transistors. Fast switching devices exhibiting short turn-off and low saturation voltage characteristics. Read the datasheet. Input and output voltage are only guaranteed to within 3V of the supplies and minimum supply voltage is spec'ed at 10V. It will likely operate at a lower supply voltage and, if you're lucky, you'll be able to find a unit that gives better than typical voltage swings. Rev. C/CZ MMBT3904 SMD General Purpose Transistor (NPN) www.taitroncomponents.com Page 3 of 9 Fig.1- Delay and Rise Time Fig.2- Storage and Fall Time 2N3904 SC-43A plastic single-ended leaded (through hole) package; 3 leads SOT54 SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VCBO collector-base voltage open emitter − 60 V VCEO collector-emitter voltage open base − 40 V VEBO emitter-base voltage open collector − 6V IC collector current (DC) − 200 mA ICM peak collector current − 300 mA At 20mA, that's about 120 Ohms. The current gain depends on the collector current, but figure on 50. With a base current of 20mA, that's a collector current of way more than the 2N3904 can handle, so 20mA will saturate it thoroughly. You can probably get by with a lower base current. Look at a 2N3904 datasheet for gain at different collector ...