DESCRIPTION VCC = 5V ±10%, PKG DWG # Q0 6 9 D1a Tamb = 0°C to +70°C GND 7 8 Q1 14-pin plastic DIP N74F20N SOT27-1 SF00065 14-pin plastic SO N74F20D SOT108-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW Dna, Dnb, Dnc, Dnd Data inputs 1.0/1.0 20µA/0.6mA Q0, Q1 Data outputs 50/33 1.0mA/20mA NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state. LOGIC DIAGRAM FUNCTION TABLE 1 INPUTS OUTPUT D0a 2 Dna Dnb Dnc Dnd Qn D0b 6 4 Q0 L X X X H D0c 5 X L X X H D0d X X L X H 9 X X X L H D1a 10 H H H H L D1b 8 NOTES: 12 Q1 D1c H = High voltage level 13 L = Low voltage level VCC = Pin 14 D1d GND = Pin 7 X = Don't care SF00066 LOGIC SYMBOL IEC/IEEE SYMBOL 1 2 4 5 9 10 12 13 1 & 2 D0a D0b D0c D0d D1a D1b D1c D1d