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74LCX32245 Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
November 2001
Revised June 2002
74LCX32245
Low Voltage 32-Bit Bidirectional Transceiver
with 5V Tolerant Inputs and Outputs
General Description
The LCX32245 contains thirty-two 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 32-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 LCX32245 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
µ
A I
CC
max
s
Power down high impedance inputs and outputs
s
Supports live insertion/withdrawal (Note 1)
s
±
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
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.
Ordering Code:
Order Number
74LCX32245G
(Note 2)(Note 3)
Package Number
BGA96A
Package Description
96-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
Note 2:
Ordering code “G” indicates Trays.
Note 3:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
© 2002 Fairchild Semiconductor Corporation
DS500428
www.fairchildsemi.com
74LCX32245
Connection Diagram
Pin Descriptions
Pin Names
OE
n
T/R
n
A
0
–A
31
B
0
–B
31
Description
Output Enable Input (Active LOW)
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
FBGA Pin Assignments
1
A
B
C
D
E
F
G
(Top Thru View)
H
J
K
L
M
N
P
R
T
B
1
B
3
B
5
B
7
B
9
B
11
B
13
B
14
B
17
B
19
B
21
B
23
B
25
B
27
B
29
B
30
2
B
0
B
2
B
4
B
6
B
8
B
10
B
12
B
15
B
16
B
18
B
20
B
22
B
24
B
26
B
28
B
31
3
T/R
1
GND
V
CC
GND
GND
V
CC
GND
T/R
2
T/R
3
GND
V
CC
GND
GND
V
CC
GND
T/R
4
4
OE
1
GND
V
CC
GND
GND
V
CC
GND
OE
2
OE
3
GND
V
CC
GND
GND
V
CC
GND
OE
4
5
A
0
A
2
A
4
A
6
A
8
A
10
A
12
A
15
A
16
A
18
A
20
A
22
A
24
A
26
A
28
A
31
6
A
1
A
3
A
5
A
7
A
9
A
11
A
13
A
14
A
17
A
19
A
21
A
23
A
25
A
27
A
29
A
30
Truth Tables
Inputs
OE
1
L
L
H
T/R
1
L
H
X
Outputs
Bus B
0
–B
7
Data to Bus A
0
–A
7
Bus A
0
–A
7
Data to Bus B
0
–B
7
HIGH Z State on A
0
–A
7
, B
0
–B
7
L
L
H
Inputs
OE
2
L
H
X
T/R
2
Outputs
Bus B
8
–B
15
Data to Bus A
8
–A
15
Bus A
8
–A
15
Data to Bus B
8
–B
15
HIGH Z State on A
8
–A
15
, B
8
–B
15
Inputs
OE
3
L
L
H
T/R
3
L
H
X
Outputs
Bus B
16
–B
23
Data to Bus A
16
–A
23
Bus A
16
–A
23
Data to Bus B
16
–B
23
HIGH Z State on A
16
–A
23
, B
16
–B
23
Inputs
OE
4
L
L
H
T/R
4
L
H
X
Outputs
Bus B
24
–B
31
Data to Bus A
24
–A
31
Bus A
24
–A
31
Data to Bus B
24
–B
31
HIGH Z State on A
24
–A
31
, B
24
–B
31
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial (HIGH or LOW, inputs and I/O’s may not float)
Z
=
High Impedance
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2
74LCX32245
Logic Diagrams
3
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74LCX32245
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
±
50
±
100
±
100
−
65 to
+
150
°
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
=
3.0V
−
3.6V
V
CC
=
2.7V
−
3.0V
V
CC
=
2.3V
−
2.7V
T
A
Free-Air Operating Temperature
Input Edge Rate, V
IN
=
0.8V–2.0V, V
CC
=
3.0V
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
±
24
±
12
±
8
−
40
0
85
10
mA
°
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
= −100 µA
I
OH
= −8
mA
I
OH
= −12
mA
I
OH
= −18
mA
I
OH
= −24
mA
V
OL
LOW Level Output Voltage
I
OL
=
100
µA
I
OL
=
8mA
I
OL
=
12 mA
I
OL
=
16 mA
I
OL
=
24 mA
I
I
I
OZ
I
OFF
Input Leakage Current
3-STATE I/O Leakage
Power-Off Leakage Current
0
≤
V
I
≤
5.5V
0
≤
V
O
≤
5.5V
V
I
=
V
IH
or V
IL
V
I
or V
O
=
5.5V
0
10
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
3.0
2.3
−
3.6
2.3
2.7
3.0
3.0
2.3
−
3.6
2.3
−
3.6
V
CC
−
0.2
1.8
2.2
2.4
2.2
0.2
0.6
0.4
0.4
0.55
±5.0
±5.0
µA
µA
µA
V
V
T
A
= −40°C
to
+85°C
Min
1.7
2.0
0.7
0.8
Max
Units
V
V
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