Component Identification

1. 4 Band Resistor Potentiometer Symbol LED A (+) Flat on body flange Identifies the cathode. Cathode Anode Symbol K (-) Symbol Diode A (+) Anode or Cathode K (-) Symbol Capacitor (Polarity) Capacitor (Non Polarity) Electrolytic Tantalum Symbol Ceramic Symbol or + - Multiplier Tolerance of Capacitor To find the tolerance of the capacitor, look up this letter in the Tolerance columns Over 10pF Letter Over 10pF 10pF or Less For the Number Multiply By : 1st digit of capacitor: 1 2nd digit of capacitor: 5 1 5 1 K 1  0.1 pF 0 B Multiplier: Multiply the 1st & 2nd digits by the proper value from the multiplier Chart. 1  0.25 pF C 10  0.5 pF 2 100 D 3  1.0 pF 1,000 F 1 % 10,000 4  2.0 pF G 2 % 100,000 H 5 3% J 5 % K 0.01 8 10 % 0.1 9 M 20 % Introduction to Op-Amps Transistor Packages and Terminal Identification Example: SN74LS76AN (c) TO-18 or TO-206AA (b) SOT-23 or TO-236AB Package A 741 general-purpose op amp would be completely identified in the following way: PrefixDesignatorSuffix (a) TO-92 or TO-226AA Device number Manufacturer (e) Pin configuration(buttom view). Emitter is closed to tab. (d) TO-46 or TO-206AB 741C LM N (8-pin) Plastic Package General-purpose op amp, commercial temperature range National (g) TO-220AB (f) Dual metal can (h) Dual in-line (DIP) Component Identification - + - + Examples: 151k = 15 x 10 = 150 pF 759 = 75 x 0.1 = 7.5 pF NOTE: The letter “R” may be used at times to signify a decimal point: 2R2 = 2.2(pF or uF) Introduction to TTL Package: D – Glass/Metal Dual-In-Line F – Glass/Metal Flat Pack H – TO-5 (TO-99, TO-100, TO-46) K – TO-3 (Steel) KC – TO-3 (Aluminum) N – Plastic Dual –In-Line Manufacturers: SN – TI Special function MC – Motorola AD/OP – Analog Device MAX – Maxim TL – Taxas Instrument LM – Linear Technology uA – Fairchild Device number : 74 – Commercial 54 – Military LS – Low Power Schottky ALS – Advance Low Power Schottky Fast – Fast Schottky