74HC238N 데이터 시트보기 (PDF) - Philips Electronics
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74HC238N Datasheet PDF : 7 Pages
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Philips Semiconductors
3-to-8 line decoder/demultiplexer
Product specification
74HC/HCT238
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
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.
INPUT
An
En
E3
UNIT LOAD COEFFICIENT
0.70
0.40
1.45
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
min.
+25
typ. max.
74HCT
−40 to +85
min. max.
−40 to +125
min. max.
UNIT VCC
(V)
WAVEFORMS
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tTHL/ tTLH
propagation delay
An to Yn
propagation delay
An to Yn
propagation delay
E3 to Yn
propagation delay
E3 to Yn
propagation delay
En to Yn
propagation delay
En to Yn
output transition time
21 35
44
53 ns 4.5 Fig.6
17 35
44
53 ns 4.5 Fig.6
22 37
46
56 ns 4.5 Fig.6
18 37
46
56 ns 4.5 Fig.6
21 35
44
53 ns 4.5 Fig.7
18 35
44
53 ns 4.5 Fig.7
7 15
19
22 ns 4.5 Figs 6 and 7
December 1990
6
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