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74HC237 データシート(PDF) 7 Page - NXP Semiconductors

部品番号 74HC237
部品情報  3-to-8 line decoder/demultiplexer with address latches
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC237 データシート(HTML) 7 Page - NXP Semiconductors

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December 1990
7
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer with
address latches
74HC/HCT237
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.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr =tf = 6 ns; CL = 50 pF
INPUT
UNIT LOAD COEFFICIENT
An
1.50
E1
1.50
E2
1.50
LE
1.50
SYMBOL PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT
VCC
(V)
WAVEFORMS
+25
−40 to +85
−40 to +125
min.
typ.
max.
min. max.
min.
max.
tPHL/ tPLH
propagation delay
An to Yn
22
38
48
57
ns
4.5
Fig.6
tPHL/ tPLH
propagation delay
LE to Yn
25
42
53
63
ns
4.5
Fig.7
tPHL/ tPLH
propagation delay
E1 to Yn
20
35
44
53
ns
4.5
Fig.7
tPHL/ tPLH
propagation delay
E2 to Yn
20
33
41
50
ns
4.5
Fig.6
tTHL/ tTLH
output transition time
7
15
19
22
ns
4.5
Fig.6
tW
LE pulse width
HIGH
10
5
13
15
ns
4.5
Fig.8
tsu
set-up time
An to LE
10
2
13
15
ns
4.5
Fig.8
th
hold time
An to LE
5
0
5
5
ns
4.5
Fig.8


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