74VCX32244 Low Voltage 32-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs
September 2000
Revised November 2002
74VCX32244
Low Voltage 32-Bit Buffer/Line Driver
with 3.6V Tolerant Inputs and Outputs
General Description
The VCX32244 contains thirty-two non-inverting buffers
with 3-STATE outputs to be employed as a memory and
address driver, clock driver, or bus oriented transmitter/
receiver. The device is nibble (4-bit) controlled. Each nibble
has separate 3-STATE control inputs which can be shorted
together for 8-bit, 16-bit or full 32-bit operation.
The 74VCX32244 is designed for low voltage (1.2V to
3.6V) V
CC
applications with I/O capability up to 3.6V.
The 74VCX32244 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Features
s
1.2V to 3.6V 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
s
Power-off high impedance inputs and outputs
s
Supports live insertion and withdrawal (Note 1)
s
Static Drive (I
OH
/I
OL
)
±
24 mA @ 3.0V V
CC
s
Uses patented noise/EMI reduction circuitry
s
Latch-up performance exceeds 300 mA
s
ESD performance:
Human body model
>
2000V
Machine model
>
200V
s
Packages 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:
Order Number
74VCX32244G
(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
DS500416
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74VCX32244
Connection Diagram
Truth Tables
Inputs
OE
1
L
L
H
Inputs
OE
2
L
L
H
Inputs
OE
3
L
L
H
I
8
-I
11
L
H
X
Inputs
OE
4
L
I
12
-I
15
L
H
X
Inputs
OE
5
L
L
5
I
0
I
2
I
4
I
6
I
8
I
10
I
12
I
15
I
16
I
18
I
20
I
22
I
24
I
26
I
28
I
31
6
I
1
I
3
I
5
I
7
I
9
I
11
I
13
I
14
I
17
I
19
I
21
I
23
I
25
I
27
I
29
I
30
OE
8
L
L
H
OE
7
L
L
H
Inputs
I
28
-I
31
L
H
X
OE
6
L
L
H
Inputs
I
24
-I
27
L
H
X
H
Inputs
I
20
-I
23
L
H
X
I
16
-I
19
L
H
X
I
4
-I
7
L
H
X
I
0
-I
3
L
H
X
Outputs
O
0
-O
3
L
H
Z
Outputs
O
4
-O
7
L
H
Z
Outputs
O
8
–O
11
L
H
Z
Outputs
O
12
-O
15
L
H
Z
Outputs
O
16
-O
19
L
H
Z
Outputs
O
20
-O
23
L
H
Z
Outputs
O
24
-O
27
L
H
Z
Outputs
O
28
-O
31
L
H
Z
(Top Thru View)
Pin Descriptions
Pin Names
OE
n
I
0
–I
31
O
0
–O
31
Description
Output Enable Input (Active LOW)
Inputs
Outputs
L
H
FBGA Pin Assignments
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
O
1
O
3
O
5
O
7
O
9
O
11
O
13
O
14
O
17
O
19
O
21
O
23
O
25
O
27
O
29
O
30
2
O
0
O
2
O
4
O
6
O
8
O
10
O
12
O
15
O
16
0
18
O
20
O
22
O
24
O
26
O
28
O
31
3
OE
1
GND
V
CC
GND
GND
V
CC
GND
OE
4
OE
5
GND
V
CC
GND
GND
V
CC
GND
OE
8
4
OE
2
GND
V
CC
GND
GND
V
CC
GND
OE
3
OE
6
GND
V
CC
GND
GND
V
CC
GND
OE
7
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial (HIGH or LOW, inputs may not float)
Z
=
High Impedance
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2
74VCX32244
Functional Description
The 74VCX32244 contains thirty-two non-inverting buffers
with 3-STATE outputs. The device is nibble (4 bits) con-
trolled with each nibble functioning identically, but indepen-
dent of each other. The control pins may be shorted
together to obtain full 32-bit operation.The 3-STATE out-
puts are controlled by an Output Enable (OE
n
) input. When
OE
n
is LOW, the outputs are in the 2-state mode. When
OE
n
is HIGH, the standard outputs are in the high imped-
ance mode but this does not interfere with entering new
data into the inputs.
Logic Diagrams
Byte 1
Byte 2
Byte 3
Byte 4
Note:
Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays.
3
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74VCX32244
Absolute Maximum Ratings
(Note 4)
Supply Voltage (V
CC
)
DC Input Voltage (V
I
)
Output Voltage (V
O
)
Outputs 3-STATED
Outputs Active (Note 5)
DC Input Diode Current (I
IK
) V
I
<
0V
DC Output Diode Current (I
OK
)
V
O
<
0V
V
O
>
V
CC
DC Output Source/Sink Current
(I
OH
/I
OL
)
DC V
CC
or GND Current per
Supply Pin (I
CC
or GND)
Storage Temperature Range (T
STG
)
−
0.5V to
+
4.6V
−
0.5V to
+
4.6V
−
0.5V to
+
4.6V
−
0.5V to V
CC
+
0.5V
−
50 mA
−
50 mA
+
50 mA
±
50 mA
±
100 mA
−
65
°
C to
+
150
°
C
Recommended Operating
Conditions
(Note 6)
Power Supply
Operating
Input Voltage
Output Voltage (V
O
)
Output in Active States
Output in 3-STATE
Output Current in I
OH
/I
OL
V
CC
=
3.0V to 3.6V
V
CC
=
2.3V to 2.7V
V
CC
=
1.65V to 2.3V
V
CC
=
1.2V
Free Air Operating Temperature (T
A
)
Minimum Input Edge Rate (
∆
t/
∆
V)
V
IN
=
0.8V to 2.0V, V
CC
=
3.0V
10 ns/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 Rat-
ings. The “Recommended Operating Conditions” table will define the condi-
tions for actual device operation.
Note 5:
I
O
Absolute Maximum Rating must be observed.
Note 6:
Floating or unused inputs must be held HIGH or LOW.
1.2V to 3.6V
−
0.3V to
+
3.6V
0V to V
CC
0.0V to 3.6V
±
24 mA
±
18 mA
±
6 mA
±
100
µ
A
−
40
°
C to
+
85
°
C
DC Electrical Characteristics
(2.7V
<
V
CC
≤
3.6V)
Symbol
V
IH
Parameter
HIGH Level Input Voltage
Conditions
V
CC
(V)
2.7 - 3.6
2.3 - 2.7
1.65 - 2.3
1.4 - 1.6
1.2
V
IL
LOW Level Input Voltage
2.7 - 3.6
2.3 - 2.7
1.65 - 2.3
1.4 - 1.6
1.2
V
OH
HIGH Level Output Voltage
I
OH
= −100 µA
I
OH
= −12
mA
I
OH
= −18
mA
I
OH
= −24
mA
I
OH
= −100 µA
I
OH
= −6
mA
I
OH
= −12
mA
I
OH
= −18
mA
I
OH
= −100 µA
I
OH
= −6
mA
I
OH
= −100 µA
I
OH
= −2
mA
I
OH
= −100 µA
2.7 - 3.6
2.7
3.0
3.0
2.3 - 2.7
2.3
2.3
2.3
1.65 - 2.3
1.65
1.4 - 1.6
1.4
1.2
V
CC
- 0.2
2.2
2.4
2.2
V
CC
- 0.2
2.0
1.8
1.7
V
CC
- 0.2
1.25
V
CC
- 0.2
1.05
V
CC
- 0.2
V
Min
2.0
1.6
0.65 x V
CC
0.65 x V
CC
0.65 x V
CC
0.8
0.7
0.35 x V
CC
0.35 x V
CC
0.05 x V
CC
V
V
Max
Units
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4
74VCX32244
DC Electrical Characteristics
Symbol
V
OL
Parameter
LOW Level Output Voltage
(Continued)
V
CC
(V)
2.7 - 3.6
2.7
3.0
3.0
2.3 - 2.7
2.3
2.3
1.65 - 2.3
1.65
1.4 - 1.6
1.4
1.2
1.2 - 3.6
1.2 - 3.6
0
1.2 - 3.6
1.2 - 3.6
2.7 - 3.6
Conditions
I
OL
=
100
µA
I
OL
=
12 mA
I
OL
=
18 mA
I
OL
=
24 mA
I
OL
=
100
µA
I
OL
=
12 mA
I
OL
=
18 mA
I
OL
=
100
µA
I
OL
=
6 mA
I
OL
=
100
µA
I
OL
=
2 mA
I
OL
=
100
µA
Min
Max
0.2
0.4
0.4
0.55
0.2
0.4
0.6
0.2
0.3
0.2
0.35
0.05
±5.0
±10
10
40
±40
750
Units
V
I
I
I
OZ
I
OFF
I
CC
∆I
CC
Input Leakage Current
3-STATE Output Leakage
Power-OFF Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
0
≤
V
I
≤
3.6V
0
≤
V
O
≤
3.6V
V
I
=
V
IH
or V
IL
0
≤
(V
I
, V
O
)
≤
3.6V
V
I
=
V
CC
or GND
V
CC
≤
(V
I
, V
O
)
≤
3.6V (Note 7)
V
IH
=
V
CC
−0.6V
µA
µA
µA
µA
µA
Note 7:
Outputs disabled or 3-STATE only.
AC Electrical Characteristics
Symbol
t
PHL
,
t
PLH
Parameter
Propagation Delay
(Note 8)
Conditions
V
CC
(V)
3.3
±
0.3
2.5
±
0.2
1.8
±
0.15
T
A
= −40°C
to
+85°C
Min
0.8
1.0
1.5
1.0
1.5
0.8
1.0
1.5
1.0
1.5
0.8
1.0
1.5
1.0
1.5
Max
2.5
3.0
6.0
12.0
30
3.5
4.1
8.2
16.4
41
3.5
3.8
6.8
13.6
34
Figures
5, 7, 8
Figures
1, 3, 4
ns
Figures
5, 6, 7
Figures
1, 3, 4
ns
Figures
5, 6
Figures
1, 2
Units
Figure
Number
C
L
=
30 pF, R
L
=
500Ω
C
L
=
15 pF, R
L
=
2kΩ
t
PZL
,
t
PZH
C
L
=
15 pF, R
L
=
2kΩ
t
PLZ
,
t
PHZ
C
L
=
15 pF, R
L
=
2kΩ
Note 8:
For C
L
=
50
P
F, add approximately 300 ps to the AC maximum specification.
1.5
±
0.1
1.2
3.3
±
0.3
2.5
±
0.2
1.8
±
0.15
1.5
±
0.1
1.2
3.3
±
0.3
2.5
±
0.2
1.8
±
0.15
1.5
±
0.1
1.2
Output Enable Time
C
L
=
30 pF, R
L
=
500Ω
Output Disable Time
C
L
=
30 pF, R
L
=
500Ω
5
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