74HC237 查看數據表（PDF） - Philips Electronics
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74HC237 Datasheet PDF : 9 Pages
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Philips Semiconductors
3-to-8 line decoder/demultiplexer with
address latches
Product specification
74HC/HCT237
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)
TEST CONDITIONS
SYMBOL PARAMETER
+25
min. typ. max.
74HC
−40 to +85
min. max.
−40 to +125
min. max.
UNIT VCC WAVEFORMS
(V)
tPHL/ tPLH propagation delay
An to Yn
tPHL/ tPLH propagation delay
LE to Yn
52 160
200
240 ns 2.0 Fig.6
19 32
40
48
4.5
15 27
34
41
6.0
61 190
240
285 ns 2.0 Fig.7
22 38
48
57
4.5
18 32
41
48
6.0
tPHL/ tPLH propagation delay
E1 to Yn
47 145
180
220 ns 2.0 Fig.7
17 29
36
44
4.5
14 25
31
38
6.0
tPHL/ tPLH propagation delay
E2 to Yn
tTHL/ tTLH output transition time
47 145
180
220 ns 2.0 Fig.6
17 29
36
44
4.5
14 25
31
38
6.0
19 75
95
110 ns 2.0 Fig.6
7 15
19
22
4.5
6 13
16
19
6.0
tW
LE pulse width
LOW
50 11
10 4
93
65
75
13
15
11
13
ns 2.0 Fig.8
4.5
6.0
tsu
set-up time
An to LE
th
hold time
An to LE
50 6
10 2
92
30 3
61
51
65
75
13
15
11
13
40
45
8
9
7
8
ns 2.0 Fig.8
4.5
6.0
ns 2.0 Fig.8
4.5
6.0
December 1990
6
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