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Электронный компонент: HD74HCT241

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HD74HCT241
Octal Buffers/Line Drivers/Line Receivers
(with noninverted 3-state outputs)
Description
The HD74HCT241 is a noninverting buffer and has one active low enable and one active high enable.
Each enable independently controls 4 buffers.
This device does not have schmitt trigger inputs.
Features
LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility
High Speed Operation: t
pd
(A to Y) = 10 ns typ (C
L
= 50 pF)
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: V
CC
= 4.5 to 5.5 V
Low Input Current: 1 A max
Low Quiescent Supply Current: I
CC
(static) = 4 A max (Ta = 25C)
Function Table
Inputs
Output
1
G
2G
A
Y
H
L
X
Z
L
H
H
H
L
H
L
L
H :
High level
L
:
Low level
X :
Irrelevant
Z
:
Off (high impedance) state of a 3-state output
HD74HCT241
2
Pin Arrangement
1
2
3
4
5
6
7
8
9
10
1
G
1A
1
2Y
4
1A
2
2Y
3
1A
3
2Y
2
1A
4
2Y
1
GND
V
CC
2G
1Y
1
2A
4
1Y
2
2A
3
1Y
3
2A
2
1Y
4
2A
1
20
19
18
17
16
15
14
13
12
11
(Top view)
HD74HCT241
3
Block Diagram
Input
1A
Two of 8
Buffers
To three other
2A Buffers
To three other
1A Buffers
V
CC
Y
A
Input
2A
V
CC
Y
B
2G
1
G
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Supply voltage range
V
CC
0.5 to +7.0
V
Input voltage
V
IN
0.5 to V
CC
+ 0.5
V
Output voltage
V
OUT
0.5 to V
CC
+ 0.5
V
DC current drain per pin
I
OUT
35
mA
DC current drain per V
CC
, GND
I
CC
, I
GND
75
mA
DC input diode current
I
IK
20
mA
DC output diode current
I
OK
20
mA
Power dissipation per package
P
T
500
mW
Storage temperature
Tstg
65 to +150
C
HD74HCT241
4
DC Characteristics
Ta = 25
C
Ta = 40 to
+85
C
Test Conditions
Item
Symbol
Min Typ Max Min
Max
Unit
V
CC
(V)
Input voltage
V
IH
2.0
--
--
2.0
--
V
4.5 to
5.5
V
IL
--
--
0.8
--
0.8
V
4.5 to
5.5
Output voltage
V
OH
4.4
--
--
4.4
--
V
4.5
Vin = V
IH
or V
IL
I
OH
= 20
A
4.18 --
--
4.13
--
4.5
I
OH
= 6 mA
V
OL
--
--
0.1
--
0.1
V
4.5
Vin = V
IH
or V
IL
I
OL
= 20
A
--
--
0.26 --
0.33
4.5
I
OL
= 6 mA
Off-state output
current
I
OZ
--
--
0.5 --
5.0
A
5.5
Vin = V
IH
or V
IL
,
Vout = V
CC
or GND
Input current
Iin
--
--
0.1 --
1.0
A
5.5
Vin = V
CC
or GND
Quiescent current
I
CC
--
--
4.0
--
40
A
5.5
Vin = V
CC
or GND, Iout = 0
A
AC Characteristics (C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25
C
Ta = 40 to
+85
C
Test Conditions
Item
Symbol
Min Typ Max Min
Max
Unit
V
CC
(V)
Propagation delay t
PHL
--
11
20
--
25
ns
4.5
time
t
PLH
--
9
20
--
25
4.5
Output enable
t
ZL
--
14
30
--
38
ns
4.5
time
t
ZH
--
12
30
--
38
4.5
Output disable
t
LZ
--
13
30
--
38
ns
4.5
time
t
HZ
--
17
30
--
38
4.5
Output rise/fall
time
t
TLH
t
THL
--
4
12
--
15
ns
4.5
Input capacitance
Cin
--
5
10
--
10
pF
--
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
DP-20N
--
Conforms
1.26 g
Unit: mm
0.51 Min
2.54 Min
5.08 Max
7.62
0.25
+ 0.11
0.05
2.54
0.25
0.48
0.10
24.50
25.40 Max
0.89
1.30
6.30
7.00 Max
1
10
11
20
0
15
1.27 Max