參數資料
型號: 74HCT138
廠商: NXP Semiconductors N.V.
英文描述: 3-to-8 line decoder/demultiplexer; inverting
中文描述: 3至8線路解碼器/解復用器;反相
文件頁數: 6/7頁
文件大?。?/td> 50K
代理商: 74HCT138
September 1993
6
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74HC/HCT138
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: standard
I
CC
category: MSI
Note to HCT types
The value of additional quiescent supply current (
I
CC
) for a unit load of 1 is given in the family specifications. To
determine
I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
INPUT
UNIT LOAD COEFFICIENT
A
n
E
n
E
3
1.50
1.25
1.00
SYMBOL
PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+
25
40 to
+
85
40 to
+
125
min.
typ.
max.
min.
max.
min.
max.
t
PHL
/ t
PLH
propagation delay
A
n
to Y
n
propagation delay
E
3
to Y
n
propagation delay
E
n
to Y
n
output transition
time
20
35
44
53
ns
4.5
Fig.6
t
PHL
/ t
PLH
18
40
50
60
ns
4.5
Fig.6
t
PHL
/ t
PLH
19
40
50
60
ns
4.5
Fig.7
t
THL
/ t
TLH
7
15
19
22
ns
4.5
Figs 6 and 7
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相關代理商/技術參數
參數描述
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