Preliminary
2001 Fairchild Semiconductor Corporation
DS500415
www.fairchildsemi.com
August 2001
Revised August 2001
7
4
VC
X32
245
Lo
w
V
o
lt
age
3
2
-Bi
t
Bidi
rect
iona
l T
r
ansce
iver
wi
th 3.6V T
o
ler
a
nt I
nputs and O
u
t
put
s
(
P
rel
i
min
a
ry)
74VCX32245
Low Voltage 32-Bit Bidirectional Transceiver
with 3.6V Tolerant Inputs and Outputs (Preliminary)
General Description
The VCX32245 contains thirty-two non-inverting bidirec-
tional buffers with 3-STATE outputs and is intended for bus
oriented applications. The device is byte controlled. Each
byte has separate 3-STATE control inputs which can 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 74VCX32245 is designed for low voltage (1.65V to
3.6V) V
CC
applications with I/O compatibility up to 3.6V.
The 74VCX32245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Features
s
1.65V3.6V V
CC
supply operation
s
3.6V tolerant inputs and outputs
s
t
PD
2.5 ns max for 3.0V to 3.6V V
CC
3.0 ns max for 2.3V to 2.7V V
CC
6.0 ns max for 1.65V to 1.95V V
CC
s
Power-down high impedance inputs and outputs
s
Supports live insertion/withdrawal (Note 1)
s
Static Drive (I
OH
/I
OL
)
24 mA @ 3.0V V
CC
18 mA @ 2.3V V
CC
6 mA @ 1.65V V
CC
s
Uses patented noise/EMI reduction circuitry
s
Latchup performance exceeds 300 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 power
down, OE should be tied to V
CC
through a pull-up resistor; the minimum
value of the resistor is determined by the current-sourcing capability of the
driver.
Ordering Code:
Note 2: BGA package available in Tape and Reel only.
Logic Symbol
Order Number
Package Number
Package Description
74VCX32245GX
(Note 2)
BGA96A
96-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
[Tape and Reel]
Preliminary
www.fairchildsemi.com
2
74VCX32245
Connection Diagram
(Top Thru View)
Truth Tables
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial (HIGH or LOW, inputs and I/O's may not float)
Z
=
High Impedance
Pin Descriptions
FBGA Pin Assignments
Logic Diagram
Inputs
Outputs
OE
1
T/R
1
L
L
Bus B
0
B
7
Data to Bus A
0
A
7
L
H
Bus A
0
A
7
Data to Bus B
0
B
7
H
X
HIGH Z State on A
0
A
7
, B
0
B
7
Inputs
Outputs
OE
2
T/R
2
L
L
Bus B
8
B
15
Data to Bus A
8
A
15
L
H
Bus A
8
A
15
Data to Bus B
8
B
15
H
X
HIGH Z State on A
8
A
15
, B
8
B
15
Inputs
Outputs
OE
3
T/R
3
L
L
Bus B
16
B
23
Data to Bus A
16
A
23
L
H
Bus A
16
A
23
Data to Bus B
16
B
23
H
X
HIGH Z State on A
16
A
23
, B
16
B
23
Inputs
Outputs
OE
4
T/R
4
L
L
Bus B
24
B
31
Data to Bus A
24
A
31
L
H
Bus A
24
A
31
Data to Bus B
24
B
31
H
X
HIGH Z State on A
24
A
31
, B
24
B
31
Pin Names
Description
OE
n
Output Enable Input (Active LOW)
T/R
n
Transmit/Receive Input
A
0
A
31
Side A Inputs or 3-STATE Outputs
B
0
B
31
Side B Inputs or 3-STATE Outputs
1
2
3
4
5
6
A
B
1
B
0
T/R
1
OE
1
A
0
A
1
B
B
3
B
2
GND
GND
A
2
A
3
C
B
5
B
4
V
CC
V
CC
A
4
A
5
D
B
7
B
6
GND
GND
A
6
A
7
E
B
9
B
8
GND
GND
A
8
A
9
F
B
11
B
10
V
CC
V
CC
A
10
A
11
G
B
13
B
12
GND
GND
A
12
A
13
H
B
14
B
15
T/R
2
OE
2
A
15
A
14
J
B
17
B
16
T/R
3
OE
3
A
16
A
17
K
B
19
B
18
GND
GND
A
18
A
19
L
B
21
B
20
V
CC
V
CC
A
20
A
21
M
B
23
B
22
GND
GND
A
22
A
23
N
B
25
B
24
GND
GND
A
24
A
25
P
B
27
B
26
V
CC
V
CC
A
26
A
27
R
B
29
B
28
GND
GND
A
28
A
29
T
B
30
B
31
T/R
4
OE
4
A
31
A
30
Preliminary
3
www.fairchildsemi.com
7
4
VC
X32
245
Absolute Maximum Ratings
(Note 3)
Recommended Operating
Conditions
(Note 5)
Note 3: 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" table are not guaranteed at the Absolute Maximum Rat-
ings. The Recommended Operating Conditions tables will define the condi-
tions for actual device operation.
Note 4: I
O
Absolute Maximum Rating must be observed.
Note 5: Floating or unused pin (inputs or I/O's) must be held HIGH or LOW.
DC Electrical Characteristics
(2.7V
<
V
CC
3.6V)
Note 6: Outputs disabled or 3-STATE only.
Supply Voltage (V
CC
)
-
0.5V to
+
4.6V
DC Input Voltage (V
I
)
-
0.5V to
+
4.6V
Output Voltage (V
O
)
Outputs 3-STATE
-
0.5V to
+
4.6V
Outputs Active (Note 4)
-
0.5 to V
CC
+
0.5V
DC Input Diode Current (I
IK
) V
I
<
0V
-
50 mA
DC Output Diode Current (I
OK
)
V
O
<
0V
-
50 mA
V
O
>
V
CC
+
50 mA
DC Output Source/Sink Current
(I
OH
/I
OL
)
50 mA
DC V
CC
or Ground Current per
Supply Pin (I
CC
or Ground)
100 mA
Storage Temperature Range (T
STG
)
-
65
C to
+
150
C
Power Supply
Operating
1.65V to 3.6V
Data Retention Only
1.2V to 3.6V
Input Voltage
-
0.3V to 3.6V
Output Voltage (V
O
)
Output in Active States
0V to V
CC
Output in 3-STATE
0.0V to 3.6V
Output Current in I
OH
/I
OL
V
CC
=
3.0V to 3.6V
24 mA
V
CC
=
2.3V to 2.7V
18 mA
V
CC
=
1.65V to 2.3V
6 mA
Free Air Operating Temperature (T
A
)
-
40
C to
+
85
C
Minimum Input Edge Rate (
t/
V)
V
IN
=
0.8V to 2.0V, V
CC
=
3.0V
10 ns/V
Symbol
Parameter
Conditions
V
CC
Min
Max
Units
(V)
V
IH
HIGH Level Input Voltage
2.73.6
2.0
V
V
IL
LOW Level Input Voltage
2.73.6
0.8
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
2.73.6
V
CC
-
0.2
I
OH
=
-
12 mA
2.7
2.2
V
I
OH
=
-
18 mA
3.0
2.4
I
OH
=
-
24 mA
3.0
2.2
V
OL
LOW Level Output Voltage
I
OL
=
100
A
2.73.6
0.2
I
OL
=
12 mA
2.7
0.4
V
I
OL
=
18 mA
3.0
0.4
I
OL
=
24 mA
3.0
0.55
I
I
Input Leakage Current
0V
V
I
3.6V
2.73.6
5.0
A
I
OZ
3-STATE Output Leakage
0V
V
O
3.6V
2.73.6
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power Off Leakage Current
0V
(V
I
, V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.73.6
40
A
V
CC
(V
I
, V
O
)
3.6V (Note 6)
2.73.6
40
I
CC
Increase in I
CC
per Input
V
IH
=
V
CC
-
0.6V
2.73.6
750
A
Preliminary
www.fairchildsemi.com
4
74VCX32245
DC Electrical Characteristics
(2.3V
V
CC
2.7V)
Note 7: Outputs disabled or 3-STATE only.
DC Electrical Characteristics
(1.65V
V
CC
<
2.3V)
Note 8: Outputs disabled or 3-STATE only.
Symbol
Parameter
Conditions
V
CC
Min
Max
Units
(V)
V
IH
HIGH Level Input Voltage
2.32.7
1.6
V
V
IL
LOW Level Input Voltage
2.32.7
0.7
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
2.32.7
V
CC
-
0.2
V
I
OH
=
-
6 mA
2.3
2.0
I
OH
=
-
12 mA
2.3
1.8
I
OH
=
-
18 mA
2.3
1.7
V
OL
LOW Level Output Voltage
I
OL
=
100
A
2.32.7
0.2
I
OL
=
12 mA
2.3
0.4
V
I
OL
=
18 mA
2.3
0.6
I
I
Input Leakage Current
0
V
I
3.6V
2.32.7
5.0
A
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
2.32.7
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power Off Leakage Current
0
(V
I
, V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.32.7
40
A
V
CC
(V
I
, V
O
)
3.6V (Note 7)
2.32.7
40
Symbol
Parameter
Conditions
V
CC
Min
Max
Units
(V)
V
IH
HIGH Level Input Voltage
1.65-2.3
0.65
V
CC
V
V
IL
LOW Level Input Voltage
1.65-2.3
0.35
V
CC
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
1.65-2.3
V
CC
-
0.2
V
I
OH
=
-
6 mA
1.65
1.25
V
OL
LOW Level Output Voltage
I
OL
=
100
A
1.65-2.3
0.2
V
I
OL
=
6 mA
1.65
0.3
I
I
Input Leakage Current
0
V
I
3.6V
1.65-2.3
5.0
A
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
1.65-2.3
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power Off Leakage Current
0
(V
I
, V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
1.65-2.3
40
A
V
CC
(V
I
, V
O
)
3.6V (Note 8)
1.65-2.3
40
Preliminary
5
www.fairchildsemi.com
7
4
VC
X32
245
AC Electrical Characteristics
(Note 9)
Note 9: For C
L
=
50pF, add approximately 300ps to the AC maximum specification.
Dynamic Switching Characteristics
Capacitance
Symbol
Parameter
T
A
=
-
40
C to
+
85
C, C
L
=
30 pF, R
L
=
500
Units
V
CC
=
3.3V
0.3V
V
CC
=
2.5
0.2V
V
CC
=
1.8V
0.15V
Min
Max
Min
Max
Min
Max
t
PHL
, t
PLH
Prop Delay
0.8
2.5
1.0
3.0
1.5
6.0
ns
t
PZL
, t
PZH
Output Enable Time
0.8
3.8
1.0
4.9
1.5
9.3
ns
t
PLZ
, t
PHZ
Output Disable Time
0.8
3.7
1.0
4.2
1.5
7.6
ns
Symbol
Parameter
Conditions
V
CC
T
A
=
+
25
C
Units
(V)
Typical
V
OLP
Quiet Output Dynamic
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
0.25
Peak V
OL
2.5
0.6
V
3.3
0.8
V
OLV
Quiet Output Dynamic
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
-
0.25
Valley V
OL
2.5
-
0.6
V
3.3
-
0.8
V
OHV
Quiet Output Dynamic
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
1.5
Valley V
OH
2.5
1.9
V
3.3
2.2
Symbol
Parameter
Conditions
T
A
=
+
25
C
Units
C
IN
Input Capacitance
V
CC
=
1.8V, 2.5V, or 3.3V, V
I
=
0V or V
CC
6
pF
C
I/O
Output Capacitance
V
I
=
0V, or V
CC
, V
CC
=
1.8V, 2.5V or 3.3V
7
pF
C
PD
Power Dissipation Capacitance
V
I
=
0V or V
CC
, F
=
10 MHz
20
pF
V
CC
=
1.8V, 2.5V or 3.3V
PDF 
ZIP