The LCX16244 contains sixteen non-inverting buffers with
3-STATE standard outputs. The device is nibble (4 bits)
controlled with each nibble functioning identically, but inde-
pendent of the other. The control pins can be shorted
together to obtain full 16-bit operation. The 3-STATE out-
puts are controlled by an Output Enable (OE
n
) input for
each nibble. When OE
n
is LOW, the outputs are in 2-state
mode. When OE
n
is HIGH, the outputs are in the high
impedance mode, but this does not interfere with entering
new data into the inputs.
Logic Diagram
3
www.fairchildsemi.com
74LCX16244
Absolute Maximum Ratings
(Note 4)
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
Parameter
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Source/Sink Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Value
Conditions
Units
V
V
Output in 3-STATE
Output in HIGH or LOW State (Note 5)
V
I
GND
V
O
GND
V
O
!
V
CC
V
mA
mA
mA
mA
mA
0.5 to
7.0
0.5 to
7.0
0.5 to
7.0
0.5 to V
CC
0.5
50
50
50
r
50
r
100
r
100
65 to
150
q
C
Recommended Operating Conditions
(Note 6)
Symbol
V
CC
V
I
V
O
I
OH
/I
OL
Supply Voltage
Input Voltage
Output Voltage
Output Current
HIGH or LOW State
3-STATE
V
CC
V
CC
V
CC
T
A
Free-Air Operating Temperature
Input Edge Rate, V
IN
0.8V–2.0V, V
CC
3.0V
3.0V
3.6V
2.7V
3.0V
2.3V
2.7V
Parameter
Operating
Data Retention
Min
2.0
1.5
0
0
0
Max
3.6
3.6
5.5
V
CC
5.5
Units
V
V
V
r
24
r
12
r
8
40
0
85
10
mA
q
C
ns/V
'
t/
'
V
Note 4:
The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated
at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recom-
mended Operating Conditions” table will define the conditions for actual device operation.
Note 5:
I
O
Absolute Maximum Rating must be observed.
Note 6:
Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
OH
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
I
OH
I
OH
I
OH
I
OH
I
OH
V
OL
LOW Level Output Voltage
I
OL
I
OL
I
OL
I
OL
I
OL
I
I
I
OZ
I
OFF
Input Leakage Current
3-STATE Output Leakage
Power-Off Leakage Current
Conditions
V
CC
(V)
2.3
2.7
2.7
3.6
2.3
2.7
2.7
3.6
T
A
40
q
C to
85
q
C
Max
Min
1.7
2.0
Units
V
0.7
0.8
V
CC
0.2
1.8
2.2
2.4
2.2
0.2
0.6
0.4
0.4
0.55
V
100
P
A
8 mA
12 mA
18 mA
24 mA
100
P
A
8 mA
12 mA
16 mA
24 mA
2.3
3.6
2.3
2.7
3.0
3.0
2.3
3.6
2.3
2.7
3.0
3.0
2.3
3.6
2.3
3.6
0
V
V
0
d
V
I
d
5.5V
0
d
V
O
d
5.5V
V
I
V
IH
or V
IL
5.5V
V
I
or V
O
r
5.0
r
5.0
10
P
A
P
A
P
A
www.fairchildsemi.com
4
74LCX16244
DC Electrical Characteristics
Symbol
I
CC
Parameter
Quiescent Supply Current
Increase in I
CC
per Input
V
I
V
IH
(Continued)
V
CC
(V)
V
CC
or GND
V
CC
0.6V
2.3
3.6
2.3
3.6
2.3
3.6
T
A
Conditions
40
q
C to
85
q
C
Max
20
Units
Min
3.6V
d
V
I
, V
O
d
5.5V (Note 7)
r
20
500
P
A
P
A
'
I
CC
Note 7:
Outputs disabled or 3-STATE only.
AC Electrical Characteristics
T
A
Symbol
Parameter
V
CC
C
L
Min
t
PHL
t
PLH
t
PZL
t
PZH
t
PLZ
t
PHZ
t
OSHL
t
OSLH
Output to Output Skew (Note 8)
Output Disable Time
Propagation Delay
Data to Output
Output Enable Time
1.0
1.0
1.0
1.0
1.0
1.0
3.3V
r
0.3V
50 pF
Max
4.5
4.5
5.5
5.5
5.4
5.4
1.0
1.0
40
q
C to
85
q
C, R
L
500
:
V
CC
C
L
Min
1.0
1.0
1.0
1.0
1.0
1.0
2.7V
50 pF
Max
5.2
5.2
6.3
6.3
5.7
5.7
V
CC
C
L
Min
1.0
1.0
1.0
1.0
1.0
1.0
2.5
r
0.2V
30 pF
Max
5.4
5.4
7.2
7.2
6.5
6.5
ns
ns
ns
ns
Units
Note 8:
Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (t
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
