74291 datasheet 2n3904

2N3904 Datasheet (PDF) 1.1. 2n3904g.pdf Size:398K _upd SEMICONDUCTOR 2N3904 TECHNICAL DATA FEATURE NPN silicon epitaxial planar transistor for switching and TO-92 Amplifier applications As complementary type, the PNP transistor 2N3906 is Recommended 1. EMITTER 2. BASE 3.
Since the 2N3904 is an NPN transistor, that means the base needs positive biasing (appropriate voltage levels and resistance) to turn on the collector emitter junction for proper current flow. Use of a load resistor (R1 above) is also important so there is not too much current being driven through the LED and transistor. 2N3904 Datasheet, 2N3904 PDF, 2N3904 Data sheet, 2N3904 manual, 2N3904 pdf, 2N3904, datenblatt, Electronics 2N3904, alldatasheet, free, datasheet, Datasheets, data ...

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2N3904, 2N3904 NPN General Purpose Transistor, buy 2N3904 Transistor ... 2N3904 Datasheet Pricing Information 1+ $0.06 25+ $0.05 100+ $0.04 ... – Information on datasheets The Transistor (NPN) • A current amplifier … – Makes small currents BIGGER • The 2N3904 Transistor β = 30-400 C= Collector B = Base E = Emitter Important 2N3904 Specifications from the datasheet Note high maximum ratings BUT 200mA maximum current 2N3904 Datasheet • Posted on the ME456 website
DATA SHEET Product specification Supersedes data of 1999 Apr 23 2004 Oct 28 DISCRETE SEMICONDUCTORS 2N5550; 2N5551 NPN high-voltage transistors book, halfpage 1996. 1. 28 1/3 semiconductor technical data kn3904 epitaxial planar npn transistor revision no : 0 general purpose application. switching application.

2N3904 Datasheet (PDF) 1.1. 2n3904g.pdf Size:398K _upd SEMICONDUCTOR 2N3904 TECHNICAL DATA FEATURE NPN silicon epitaxial planar transistor for switching and TO-92 Amplifier applications As complementary type, the PNP transistor 2N3906 is Recommended 1. EMITTER 2. BASE 3. The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. [1] [2] [3] It is designed for low current and power , medium voltage , and can operate at moderately high speeds.
Nov 30, 2015 · The main difference is in Ft; typically 1100MHz for the SS9018 and 300MHz for the 2N3904. There are different rules-of-thumb for amplifiers; one says that Ft should be five times the required upper frequency. On that basis the 2N3904 is suitable for up to about 60MHz whilst the SS9018 will serve at over 200MHz. 2N3904 results. BJT: 2N3904 2N3904-T18 2N3904A 2N3904C 2N3904CSM 2N3904DCSM 2N3904E 2N3904G 2N3904N 2N3904S (Marking ZC ) 2N3904SC (Marking ZCC ) 2N3904U (Marking ZC ) 2N3904V H2N3904 MOSFET: IGBT: SCR:

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NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. Absolute Maximum Ratings* T A = 25°C unless otherwise noted *
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 ...