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74LCX16245 Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
February 1994
Revised May 2005
74LCX16245
Low Voltage 16-Bit Bidirectional Transceiver
with 5V Tolerant Inputs and Outputs
General Description
The LCX16245 contains sixteen non-inverting bidirectional
buffers with 3-STATE outputs and is intended for bus ori-
ented applications. The device is designed for low voltage
(2.5V or 3.3V) V
CC
applications with capability of interfac-
ing to a 5V signal environment. The device is byte con-
trolled. 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.
The LCX16245 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–3.6V V
CC
specifications provided
s
4.5 ns t
PD
max (V
CC
3.3V), 20
P
A I
CC
max
s
Power down high impedance inputs and outputs
s
Supports live insertion/withdrawal (Note 1)
s
r
24 mA output drive (V
CC
3.0V)
s
Uses patented noise/EMI reduction circuitry
s
Latch-up performance exceeds 500 mA
s
ESD performance:
Human body model
!
2000V
Machine model
!
200V
s
Also packaged in plastic Fine-Pitch Ball Grid Array
(FBGA)
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.
Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays.
www.fairchildsemi.com
2
74LCX16245
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 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
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 I/O 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
8mA
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
3
www.fairchildsemi.com
74LCX16245
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
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
4.5
4.5
6.5
6.5
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
5.2
5.2
7.2
7.2
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
0.2V
30 pF
Max
5.4
5.4
8.5
8.5
7.7
7.7
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
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