74F40
74F40 is Dual 4-input NAND buffer manufactured by Philips Semiconductors.
DESCRIPTION
14-pin plastic DIP 14-pin plastic SO MERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F40N N74F40D
D0c D0d Q0 GND
SF00065
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS Dna, Dnb, Dnc, Dnd Q0, Q1 Data inputs Data outputs DESCRIPTION
74F (U.L.) HIGH/LOW 1.0/2.0 750/106.7 LOAD VALUE HIGH/LOW 20µA/1.2m A 15m A/64m A
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6m A in the Low state.
LOGIC DIAGRAM
D0a D0b D0c D0d 1 2 6 4 5 Q0
FUNCTION TABLE
INPUTS Dna L X X X Dnb X L X X Dnc X X L X H Dnd X X X X H OUTPUT Qn H H H H L
D1a D1b D1c D1d VCC = Pin 14 GND = Pin 7 NC = Pin 3, 11
9 10 8 12 13 Q1
H H NOTES: 1. H = High voltage level 2. L = Low voltage level 3. X = Don’t care
SF00081
LOGIC SYMBOL
IEC/IEEE SYMBOL
&
13 2 4
D0a D0b D0c D0d D1a D1b D1c D1d
Q0 Q1
9 10 8 12
6 VCC = Pin 14 GND = Pin 7 NC = Pin 3, 11
SF00082
SF00083
April 11,...
