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74LCXR162245 Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs/Outputs and 26
:
Series
Resistors in the Outputs
August 1998
Revised June 2005
74LCXR162245
Low Voltage 16-Bit Bidirectional Transceiver
with 5V Tolerant Inputs/Outputs
and 26: Series Resistors in the Outputs
General Description
The LCXR162245 contains sixteen non-inverting bidirec-
tional buffers with 3-STATE outputs and is intended for bus
oriented applications. The device is designed for low volt-
age (2.5V or 3.3V) V
CC
applications with capability of inter-
facing to a 5V signal environment. The device is byte
controlled. Each byte has separate control inputs which
could be shorted together for full 16-bit operation. The T/R
inputs determine the direction of data flow through the
device. The OE inputs disable both the A and B ports by
placing them in a high impedance state.
In addition, all A and B outputs include equivalent 26
:
(nominal) series resistors to reduce overshoot and under-
shoot and are designed to sink/source up to 12 mA at
V
CC
3.0V.
The LCXR162245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
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 4:
I
O
Absolute Maximum Rating must be observed.
Note 5:
Unused pins (Inputs or I/O's) 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
I
OH
V
OL
LOW Level Output Voltage
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
I
I
OZ
Input Leakage Current
3-STATE I/O Leakage
Conditions
V
CC
(V)
2.3
2.7
2.7
3.6
2.3
2.7
2.7
3.6
T
A
Min
1.7
2.0
0.7
0.8
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
V
V
40
q
C to
85
q
C
Max
Units
V
V
100
P
A
4 mA
4 mA
6 mA
8 mA
12 mA
100
P
A
4 mA
4 mA
6 mA
8 mA
12 mA
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
0
d
V
I
d
5.5V
0
d
V
O
d
5.5V
V
I
V
IH
or V
IL
r
5.0
r
5.0
P
A
P
A
3
www.fairchildsemi.com
74LCXR162245
DC Electrical Characteristics
Symbol
I
OFF
I
CC
Parameter
Power-Off Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
(Continued)
V
CC
(V)
0
2.3
3.6
2.3
3.6
2.3
3.6
T
A
Min
Conditions
V
I
or V
O
V
I
V
IH
5.5V
40
q
C to
85
q
C
Max
10
20
Units
P
A
P
A
P
A
V
CC
or GND
V
CC
0.6V
3.6V
d
V
I
, V
O
d
5.5V (Note 6)
r
20
500
'
I
CC
Note 6:
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 7)
Output Disable Time
Propagation Delay
A
n
to B
n
or B
n
to A
n
Output Enable Time
1.5
1.5
1.5
1.5
1.5
1.5
3.3V
r
0.3V
50 pF
Max
5.3
5.3
7.3
7.3
6.4
6.4
1.0
1.0
40
q
C to
85
q
C, R
L
V
CC
C
L
Min
1.5
1.5
1.5
1.5
1.5
1.5
2.7V
50 pF
Max
6.0
6.0
8.0
8.0
6.9
6.9
500
:
V
CC
C
L
Min
1.5
1.5
1.5
1.5
1.5
1.5
2.5V
r
0.2
30 pF
Max
6.4
6.4
9.5
9.5
7.7
7.7
ns
ns
ns
ns
Units
Note 7:
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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