ChipFind - документация

Электронный компонент: IN74LV244DW

Скачать:  PDF   ZIP
IN74LV244
1
O
CTAL
B
UFFER
/L
INE
D
RIVER
3-S
TATE
The IN74LV244 is a low-voltage Si-gate CMOS device and is pin and function compatible with
IN74HC/HCT244.
The IN74LV244 is an octal non-inverting buffer/line
driver with 3-state outputs. The 3-state outputs are controlled
by the output enable inputs OE
1
and OE
2
. A HIGH on nOE
causes the outputs to assume a high impedance OFF-state.
The IN74LV244 is identical to the IN74LV240 but has non-
inverting outputs.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 1.2 to 3.6 V
Low Input Current: 1.0 A, 0.1 at = 25
Output Current: 8 mA at V
CC
= 3.0 V
High Noise Immunity Characteristic of CMOS Devices
N SUFFIX
PLASTIC DIP
DW SUFFIX
SO
1
20
1
20
ORDERING INFORMATION
IN74LV244N Plastic DIP
IN74LV244DW
SOIC
IZ74LV244
chip
T
A
= -40
to 125 C for all
packages
FUNCTION TABLE
Input
OUTPUT
nOE nAn nYn
L L L
L H H
H X Z
H= high level
L = low level
X = don't care
Z = high impedance
LOGIC DIAGRAM
2
11
6
15
4
13
8
17
1
19
1A0
1Y0
2A0
2Y0
1A2
1Y2
2A0
2Y0
1A1
1Y1
2A1
2Y1
1A3
1Y3
2A1
2Y1
1OE
2OE
18
9
14
5
16
7
12
3
DATA
INPUTS
NONINVERTING
OUTPUTS
OUTPUT
ENABLES

PIN 20=V
CC
PIN 10 = GND
PIN ASSIGNMENT
1
2
3
5
4
6
7
8
9
10
V
CC
20
18
17
16
15
14
19
11
12
13
GND
2OE
1OE
1A
0
2Y
3
1A
1
2Y
2
1A
2
2Y
1
1A
3
2Y
0
1Y
0
2A
3
1Y
1
2A
2
1Y
2
2A
1
1Y
3
2A
0
IN74LV244
2
MAXIMUM RATINGS
*
Symbol Parameter
Value
Unit
V
CC
DC supply voltage
-0.5 to +5.0
V
I
IK
*
1
DC Input diode current
20
mA
I
OK
*
2
DC Output diode current
50
mA
I
O
*
3
DC Output source or sink current
35
mA
I
CC
DC
V
CC
current
70
mA
I
GND
DC GND current
70
mA
P
D
Power dissipation per package: *
4
Plastic DIP
SO
750
500
mW
Tstg
Storage Temperature
-65 to +150
C
T
L
Lead Temperature, 1.5
mm (Plastic DIP
Package), 0.3 mm (SO Package) from Case for
4 Seconds
260
C
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
*
1
V
I
< -0.5 V or V
I
> V
CC
+ 0.5 V.
*
2
V
O
< -0.5 V or V
O
> V
CC
+ 0.5 V.
*
3
-0.5 V < V
O
< V
CC
+ 0.5 V.
*
4
Derating - Plastic DIP: - 12 mW/
C from 70 to 125C
SO Package: : - 8 mW/
C from 70 to 125C

RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min
Max
Unit
V
CC
DC Supply Voltage
1.2
3.6
V
V
I
Input Voltage
0
V
CC
V
V
O
Output Voltage
0
V
CC
V
T
A
Operating Temperature, All Package Types
-40
+125
C
t
r
, t
f
Input Rise and Fall Time (Figure 1)
V
CC
=1.2 V
V
CC
=2.0 V
V
CC
=3.0 V
V
CC
=3.6 V
0
0
0
0
1000
700
500
400
ns
This device contains protection circuitry to guard against damage due to high static
voltages or electric fields. However, precautions must be taken to avoid applications of any voltage
higher than maximum rated voltages to this high-impedance circuit. For proper operation, V
IN
and
V
OUT
should be constrained to the range GND
(V
IN
or V
OUT
)
V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or
V
CC
). Unused outputs must be left open.
IN74LV244
3
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)
Test
V
CC
Guaranteed Limit
Symbo
l
Parameter conditions V 25
C -40C to
85
C
125
C
Unit
min max min
max
min
max
V
IH
HIGH level input
voltage
1.2
2.0
3.0
3.6
0.9
1.4
2.1
2.5
-
-
-
-
0.9
1.4
2.1
2.5
-
-
-
-
0.9
1.4
2.1
2.5
-
-
-
-
V
V
IL
LOW level input
voltage
1.2
2.0
3.0
3.6
-
-
-
-
0.3
0.6
0.9
1.1
-
-
-
-
0.3
0.6
0.9
1.1
-
-
-
-
0.3
0.6
0.9
1.1
V
V
OH
HIGH
level
output voltage
V
I
= V
IH
or V
IL
I
O
= -50
1.2
2.0
3.0
3.6
1.1
1.92
2.92
3.52
-
-
-
-
1.0
1.9
2.9
3.5
-
-
-
-
1.0
1.9
2.9
3.5
-
-
-
-
V
V
I
= V
IH
or V
IL
I
O
= -8 m
3.0 2.48
- 2.34
-
2.20
-
V
V
OL
LOW
level
output voltage
V
I
= V
IH
or V
IL
I
O
= 50
1.2
2.0
3.0
3.6
-
-
-
-
0.09
0.09
0.09
0.09
-
-
-
-
0.1
0.1
0.1
0.1
-
-
-
-
0.1
0.1
0.1
0.1
V
V
I
= V
IH
or V
IL
I
O
= 8 m
3.0 - 0.33
- 0.4 - 0.5 V
I
I
Input
current V
I
= V
CC
or 0 V
*
-
0.1
-
1.0
-
1.0
I
OZ
Three state
leakage current
3-state
outputs
V
I
(01,19) =
V
IH
V
O
=V
CC
or 0 V
1.2
*
-
0.5
-
5
-
10
I
CC
Supply
current V
I
=V
CC
or 0 V
I
O
= 0
* - 8.0 - 80 - 160
* V
CC
= 3.3
0.3 V

IN74LV244
4
AC ELECTRICAL CHARACTERISTICS (C
L
=50 pF, t
r
=t
f
=6.0 ns)
Test
V
CC
Guaranteed Limit
Symbol Parameter conditions
V
25
C -40C to
85
C
125
C
Unit
min ma
x
min max min max
t
PHL,
t
PLH
Propagation delay ,
1An to 1Yn, 2An to
2Yn
V
I
= 0 V or
V
CC
Figure 1
and 3
1.2
2.0
*
-
-
-
100
24
15
-
-
-
125
30
19
-
-
-
150
36
23
ns
t
PHZ
t
PLZ
Propagation delay,
OE
1
to 1Yn, OE
2
to
2Yn
V
I
= 0 V or
V
CC
Figure 2
and 4
1.2
2.0
*
-
-
-
140
30
20
-
-
-
175
35
24
-
-
-
210
41
28
ns
t
PZH
t
PZL
Propagation delay,
OE
1
to 1Yn, OE
2
to
2Yn
V
I
= 0 V or
V
CC
Figure 2
and 4
1.2
2.0
*
-
-
-
140
32
20
-
-
-
175
40
25
-
-
-
210
48
30
ns
t
THL,
t
TLH
Output
Transition
Time, Any Output
V
I
= 0 V or
V
CC
Figure 1
and 3
1.2
2.0
*
-
-
-
60
16
10
-
-
-
75
20
13
-
-
-
90
24
15
ns
C
I
Input
capacitance
3.0 -
7.0
- 7.0 - 7.0 pF
C
PD
Power dissipation
capacitance (per one
channel)
V
I
= 0 V or
V
CC
-
50 - - - - pF
* V
CC
= 3.3
0.3 V

Figure 1. Switching Waveforms
Figure 2. Switching Waveforms

* Includes all probe and jig capacitance
* Includes all probe and jig capacitance
Figure 3. Test Circuit
Figure 4. Test Circuit

DEVICE
UNDER
TEST
OUTPUT
C
L
*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
1 k
C
L
*
TEST POINT
Connect to V
CC
when
testing t
PLZ
and t
PZL
Connect to GND
when
testing t
PHZ
and t
PZH
t
t
t
t
PZH
PHZ
PZL
PLZ
V
V
CC
OH
GND
50%
50%
50%
1OE
2OE
or
1Y or 2Y
n
n
1Y or 2Y
n
n
GND
V
V
OL
CC
90%
90%
50%
50%
10%
10%
t
t
t
t
t
t
f
r
PLH
TLH
THL
PHL
V
CC
GND
1A or 2A
n
n
1Y or 2Y
n
n