參數(shù)資料
型號(hào): 74HC237
廠商: NXP Semiconductors N.V.
英文描述: 3-to-8 line decoder/demultiplexer with address latches
中文描述: 3至8線(xiàn)路解碼器/解復(fù)用器的地址鎖存器
文件頁(yè)數(shù): 7/9頁(yè)
文件大?。?/td> 68K
代理商: 74HC237
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
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
1
E
2
LE
1.50
1.50
1.50
1.50
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
LE to Y
n
propagation delay
E
1
to Y
n
propagation delay
E
2
to Y
n
output transition time
22
38
48
57
ns
4.5
Fig.6
t
PHL
/ t
PLH
25
42
53
63
ns
4.5
Fig.7
t
PHL
/ t
PLH
20
35
44
53
ns
4.5
Fig.7
t
PHL
/ t
PLH
20
33
41
50
ns
4.5
Fig.6
t
THL
/ t
TLH
7
15
19
22
ns
4.5
Fig.6
t
W
LE pulse width
HIGH
set-up time
A
n
to LE
hold time
A
n
to LE
10
5
13
15
ns
4.5
Fig.8
t
su
10
2
13
15
ns
4.5
Fig.8
t
h
5
0
5
5
ns
4.5
Fig.8
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