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74HC20D Datasheet(PDF) 6 Page - NXP Semiconductors

Part No. 74HC20D
Description  Dual 4-input NAND gate
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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74HC20D Datasheet(HTML) 6 Page - NXP Semiconductors

   
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December 1990
6
Philips Semiconductors
Product specification
Dual 4-input NAND gate
74HC/HCT20
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: SSI
Note to HCT types
The value of additional quiescent supply current (
∆ICC) for a unit load of 1 is given in the family specifications.
To determine
∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr =tf = 6 ns; CL =50pF
AC WAVEFORMS
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”.
INPUT
UNIT LOAD COEFFICIENT
nA, nB, nC, nD
0.3
SYMBOL
PARAMETER
Tamb (°C)
TEST CONDITIONS
74HCT
UNIT
VCC
(V)
WAVEFORMS
+25
−40 to +85
−40 to +125
min.
typ.
max.
min.
max.
min.
max.
tPHL/ tPLH
propagation delay
nA, nB, nC, nD to nY
16
28
35
42
ns
4.5
Fig.7
tTHL/ tTLH
output transition time
7
15
19
22
ns
4.5
Fig.7
Fig.7
Waveforms showing the enable input (nA, nB, nC, nD) to output (nY) propagation delays and the output
transition times.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.


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