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74LCXH16245 Low Voltage 16-Bit Bidirectional Transceiver with Bushold
May 2002
Revised June 2005
74LCXH16245
Low Voltage 16-Bit Bidirectional Transceiver
with Bushold
General Description
The LCXH16245 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.
The LCXH16245 data inputs include active bushold cir-
cuitry, eliminating the need for external pull-up resistors to
hold unused or floating data inputs at a valid logic level.
The LCXH16245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Features
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 outputs
s
Bushold on inputs eliminates the need for external
pull-up/pull-down resistors
s
r
24 mA output drive (V
CC
3.0V)
s
Implements patented noise/EMI reduction circuitry
s
Latch-up performance conforms to the requirements of
JESD78
s
ESD performance:
Human body model
!
2000V
Machine model
!
200V
s
Also packaged in plastic Fine-Pitch Ball Grid Array
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:
Floating or unused control inputs must be HIGH or LOW.
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
Input Leakage Current
Data
V
I
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
V
CC
or GND
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
V
V
r
5.0
r
5.0
Control O
d
V
I
d
5.5
P
A
3
www.fairchildsemi.com
74LCXH16245
DC Electrical Characteristics
Symbol
I
I(HOLD)
Parameter
Bushold Input Minimum
Drive Hold Current
V
IN
V
IN
V
IN
V
IN
I
I(OD)
Bushold Input Over-Drive
Current to Change State
(Continued)
V
CC
(V)
0.7V
1.7V
0.8V
2.0V
2.3
3.0
2.7
3.6
2.3
3.6
0
2.3–3.6
2.3–3.6
T
A
Conditions
40
q
C to
85
q
C
Max
45
Units
Min
45
75
P
A
75
300
(Note 6)
(Note 7)
(Note 6)
(Note 7)
300
450
P
A
450
r
5.0
10
20
500
I
OZ
I
OFF
I
CC
3-STATE I/O Leakage
Power-Off Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
V
O
V
I
V
IH
V
CC
or GND
5.5V
V
CC
or GND
V
CC
0.6V
P
A
P
A
P
A
P
A
V
I
or V
O
'
I
CC
Note 6:
An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 7:
An external driver must sink at least the specified current to switch from HIGH-to-LOW.
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
1.0
1.0
1.0
1.0
1.0
1.0
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
1.0
1.0
1.0
1.0
1.0
1.0
2.7V
50 pF
Max
5.2
5.2
7.2
7.2
6.9
6.9
500
:
V
CC
C
L
Min
1.0
1.0
1.0
1.0
1.0
1.0
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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