INTEGRATED CIRCUITS
74ALS20A Dual 4-Input NAND gate
Product specification IC05 Data Handbook 1996 Jul 01
Philips Semiconductors
Philips Semiconductors
Product specification
Dual 4-input NAND gate
74ALS20A
TYPE 74ALS20A
TYPICAL PROPAGATION DELAY 4.5ns
TYPICAL SUPPLY CURRENT (TOTAL) 0.65mA
PIN CONFIGURATION
1A 1B NC 1 2 3 4 5 6 7 14 VCC 13 2D 12 2C 11 NC 10 2B 9 8 2A 2Y
ORDERING INFORMATION
ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 74ALS20AN 74ALS20AD DRAWING NUMBER SOT27-1 SOT108-1
1C 1D 1Y GND
14-pin plastic DIP 14-pin plastic SO
SC00024
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS nA, nB, nC, nD nY Data inputs Data outputs DESCRIPTION 74ALS (U.L.) HIGH/LOW 1.0/1.0 20/80 LOAD VALUE HIGH/LOW 20µA/0.1mA 0.4mA/8mA
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
IEC/IEEE SYMBOL
1
&
6
1
2
4
5
9
10
12
13
2 4
1A 1B 1C 1D 2A 2B 2C 2D
5
9 1Y 2Y 10 8 12 6 VCC = Pin 14 GND = Pin 7 8 13
SC00025
SF00068
LOGIC DIAGRAM
1A 1B 1C 1D 2A 2B 2C VCC = Pin 14 GND = Pin 7 2D 1 2 4 5 9 10 12 13
FUNCTION TABLE
INPUTS nA
6 1Y
OUTPUT nC H X X L X nD H X X X L nY L H H H H
nB H X L X X
H L X
8
2Y
X X
SC00026
H = High voltage level L = Low voltage level X = Don’t care
1996 Jul 01
2
853–0859 01670
Philips Semiconductors
Product specification
Dual 4-input NAND gate
74ALS20A
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair t.