The symbol of the transistor has an arrow on the emitter. The pnp transistor the pnp transistor is the exact opposite to the npn transistor device we looked at in the previous tutorial. You can always remember that the arrow points at the n material. The 2n3904 is a common npn bipolar junction transistor used for generalpurpose lowpower amplifying or switching applications. Onsemi general purpose transistors npn silicon,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Semiconductor components industries, llc, 2003 december, 2003. Recent listings manufacturer directory get instant insight into any. Blog entry using transistor as a switch december 23, 2008 by rwb, under electronics most of microcontrollers work within 5 volt environment and the io port can only handle current up to 20ma. Posted on december, 2018 september 10, 2019 by pinout. General description npnpnp generalpurpose double transistors in an sot457 sc74 plastic package. However, since the emitter, base, and collector in the pnp transistor are made of materials that are different from those used in the npn transistor, different current carriers flow in the pnp unit. The lowvoltage logic just has to feed sufficient current into the npn transistor to turn it fully on. If the transistor is a pnp, then the arrow points to the base of the transistor, otherwise it points to the output. Fairchild, alldatasheet, datasheet, datasheet search site for electronic.
The 2n3904 npn and 2n3906 pnp are complementary transistor pairs. The rest of this article will discuss pnp characteristics and applications. This transistor is lowcost, widely available and sufficiently robust to be of use by experimenters and electronics hobbyists. The product status of devices described in this document may have changed since this document was published and may differ in case of multiple devices. Ive been saving my used batteries in a box for recycle and now im taking it out and use the remaining voltage to light a 10mm led as my night light in my room,livingroom,kitchen,hallways and lights in the bathroom so my kids dont have to turn on the light at night when they do no. A properly biased pnp transistor the pnp transistor works essentially the same as the npn transistor. Umt3904 sst3904 mmst3904 2n3904transistorsnpn general purpose transistorumt3904 sst3904 mmst3904 2n3904. For more information on this transistor, see the 2n3904 datasheet. The 2n3904 is a common npn bipolar junction transistor used for general purpose lowpower.
General purpose transistor 2n3906g pnp rohs device to92 features. I use these for my joule thief project that i found on youtube while searching how to save energy. Nxp semiconductors product data sheet npn switching transistor pmst3904 data sheet status notes 1. Bc817dpn npnpnp general purpose transistor 27 november 2019 product data sheet 1. Bjt datasheet, bjt pdf, bjt data sheet, bjt manual, bjt pdf, bjt, datenblatt, electronics bjt, alldatasheet, free, datasheet, datasheets, data sheet, datas sheets. Figure 6 is an example night light circuit using a. Transistor and diode data book, 1236 pages, 1973, texas instruments. Transistor 2n3904 bipolar bjt npn general purpose pack. Check out the datasheet, see if you recognize any familiar characteristics. Features and benefits reduces component count reduces pick and place costs aecq101 qualified 3. There is a temptation to think that we could do the same trick with an pnp transistor as shown in figure 1b. This means that most of the charge carriers in a pnp are holes.
Npn switching transistor 2n3904 features low current max. Npn switching transistor mmbt3904 limiting values in accordance with the absolute maximum rating system iec 604. Features1 bvceo 40v ic 1ma2 complements the umt3906 sst3906 mmst3906 datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other. Semiconductor 2n3904 technical data feature npn silicon epitaxial planar transistor for switching and to92 amplifier applications as complementary type, the pnp transistor 2n3906 is recommended 1. Npn general purpose amplifier, 2n3904 datasheet, 2n3904 circuit, 2n3904 data sheet.
It is designed for low current and power, medium voltage, and can operate at moderately high speeds. The low side switch is very simple as shown in figure 1a. Here the base terminal has negative bias with respect to emitter and the emitter terminal has positive bias voltage with respect to. The circuit connection of pnp transistor with supply voltages is given below. Please consult the most recently issued document before initiating or completing a design. If you cant search it here, nowhere else in the world. Description pnp switching transistor in a sot23 plastic package. Highspeed, saturated switching applications for industrial service in thick and thinfilm circuits. Aah 200711 mmbt2222a smd general purpose transistor npn. The 2n3906 is a commonly used pnp bipolar junction transistor intended for general purpose.
Com datasheet search site for electronic components and semiconductors and other semiconductors. Discrete semiconductors data sheet book, halfpage m3d186 2n3906 pnp switching transistor 1999 apr 23 product specification supersedes data of 1997 jun 20 philips semiconductors product specification pnp switching transistor 2n3906 features pinning low current max. Data sheet book, halfpage m3d186 2n3904 npn switching transistor. Pnp highside transistor switching with microcontroller. When external voltage is applied to a pnp transistor, it is said to be a biased pnp transistor. Bipolar npn device in a hermetically sealed to18 metal package. Data sheet book, halfpage m3d186 2n3904 npn switching transistor 1999 apr. Pinning pin description 1 collector 2 base 3 emitter fig. Smallsignal transistor data book, 86 pages, 1984, motorola.
Nxp semiconductors product data sheet npn switching transistor mmbt3904 data sheet status notes 1. Amplifier applications as complementary type, the pnp transistor 2n3906 is recommended 1. Pnp transistor circuit characteristics, working, applications. The 2n3904 is a really common transistor that we use all the time and the 2n3906 is its pnp sibling. As shown above, a pnp transistors emitter and collector are formed via ptype doping. Depending on the polarity of the applied voltage, the pnp transistor can be operated in three modes. The problem is that the emitterbase junction is always forward biased.
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