74HCT138U 查看數據表（PDF） - Philips Electronics
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74HCT138U Datasheet PDF : 7 Pages
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Philips Semiconductors
3-to-8 line decoder/demultiplexer; inverting
Product specification
74HC/HCT138
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
SYMBOL PARAMETER
74HC
+25
−40 to +85
min. typ. max. min. max.
tPHL/ tPLH
propagation delay
An to Yn
41 150
15 30
12 26
190
38
33
tPHL/ tPLH
propagation delay
E3 to Yn
47 150
17 30
14 26
190
38
33
tPHL/ tPLH
propagation delay
En to Yn
47 150
17 30
14 26
190
38
33
tTHL/ tTLH
output transition
time
19 75
7 15
6 13
95
19
16
−40 to +125
min. max.
225
45
38
225
45
38
225
45
38
110
22
19
UNIT
ns
ns
ns
ns
TEST CONDITIONS
VCC WAVEFORMS
(V)
2.0
4.5 Fig.6
6.0
2.0
4.5 Fig.6
6.0
2.0
4.5 Fig.7
6.0
2.0
4.5 Figs 6 and 7
6.0
September 1993
5
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