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74LCX2244 Low Voltage Buffer/Line Driver with 5V Tolerant Inputs and Outputs with 26Ω Series Resistors in the
Outputs
October 1995
Revised May 2003
74LCX2244
Low Voltage Buffer/Line Driver with 5V Tolerant Inputs
and Outputs with 26
Ω
Series Resistors in the Outputs
General Description
The LCX2244 contains eight non-inverting buffers with
3-STATE outputs. The device may be employed as a mem-
ory address driver, clock driver and bus-oriented transmit-
ter/receiver. The LCX2244 is designed for low voltage
(2.5V or 3.3V) V
CC
applications with capability of interfac-
ing to a 5V signal environment. The 26
Ω
series resistors
help reduce output overshoot and undershoot.
The LCX2244 is fabricated with an advanced CMOS tech-
nology to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
s
5V tolerant inputs and outputs
s
2.3V to 3.6V V
CC
specifications provided
s
7.5 ns t
PD
max (V
CC
=
3.3V) 10
µ
A I
CC
max
s
Power down high impedance inputs and outputs
s
26
Ω
-series resistors in the outputs
s
Supports live insertion/withdrawal (Note 1)
s
±
12 mA output drive (V
CC
=
3.0V)
s
Implements patented noise/EMI reduction circuitry
s
Latch-up performance exceeds 500 mA
s
ESD performance:
Human body model
>
2000V
Machine model
>
200V
s
Leadless DQFN package
Note 1:
To ensure the high-impedance state during power up or down, OE
should be tied to V
CC
through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number
74LCX2244WM
74LCX2244SJ
74LCX2244BQ
(Preliminary)
74LCX2244MSA
74LCX2244MTC
Package
Number
M20B
M20D
MLP020B
(Preliminary)
MSA20
MTC20
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
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 3:
I
O
Absolute Maximum Rating must be observed.
Note 4:
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
= −100 µA
I
OH
= −4
mA
I
OH
= −4
mA
I
OH
= −6
mA
I
OH
= −
8mA
I
OH
= −12
mA
V
OL
LOW Level Output Voltage
I
OL
=
100
µA
I
OL
=
4 mA
I
OL
=
4 mA
I
OL
=
6 mA
I
OL
=
8 mA
I
OL
=
12 mA
I
I
I
OZ
Input Leakage Current
3-STATE Output Leakage
0
≤
V
I
≤
5.5V
0
≤
V
O
≤
5.5V
V
I
=
V
IH
or V
IL
Conditions
V
CC
(V)
2.3
−
2.7
2.7
−
3.6
2.3
−
2.7
2.7
−
3.6
2.3
−
3.6
2.3
2.7
3.0
2.7
3.0
2.3
−
3.6
2.3
2.7
3.0
2.7
3.0
2.3
−
3.6
2.3
−
3.6
V
CC
−
0.2
1.8
2.2
2.4
2.0
2.0
0.2
0.6
0.4
0.55
0.6
0.8
±5.0
±5.0
µA
µA
V
V
T
A
= −40°C
to
+85°C
Min
1.7
2.0
0.7
0.8
Max
Units
V
V
3
www.fairchildsemi.com
74LCX2244
DC Electrical Characteristics
Symbol
I
OFF
I
CC
∆I
CC
Parameter
Power-Off Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
(Continued)
V
CC
(V)
0.0
2.3
−
3.6
2.3
−
3.6
2.3
−
3.6
T
A
= −40°C
to
+85°C
Min
Max
10.0
10.0
±10.0
500
µA
µA
µA
Conditions
V
I
or V
O
=
5.5V
V
I
=
V
CC
or GND
3.6V
≤
V
I
, V
O
≤
5.5V (Note 5)
V
IH
=
V
CC
−
0.6V
Units
Note 5:
Outputs disabled or 3-STATE only.
AC Electrical Characteristics
T
A
= −40°C
to
+85°C,
R
L
=
500Ω
Symbol
Parameter
V
CC
=
3.3V
±
0.3V
C
L
=
50pF
Min
t
PHL
t
PLH
t
PZL
t
PZH
t
PLZ
t
PHZ
t
OSHL
t
OSLH
Output to Output Skew (Note 6)
Output Disable Time
Propagation Delay
Data to Output
Output Enable Time
1.5
1.5
1.5
1.5
1.5
1.5
Max
7.5
7.5
9.0
9.0
7.0
7.0
1.0
1.0
V
CC
=
2.7V
C
L
=
50pF
Min
1.5
1.5
1.5
1.5
1.5
1.5
Max
8.5
8.5
10.0
10.0
8.0
8.0
V
CC
=
2.5
±
0.2V
C
L
=
30pF
Min
1.5
1.5
1.5
1.5
1.5
1.5
Max
9.0
9.0
10.5
10.5
8.4
8.4
ns
ns
ns
ns
Units
Note 6:
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
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