74VCX16244 Low Voltage 16-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs
October 1996
Revised June 2005
74VCX16244
Low Voltage 16-Bit Buffer/Line Driver with
3.6V Tolerant Inputs and Outputs
General Description
The VCX16244 contains sixteen 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 full 16-bit operation.
The 74VCX16244 is designed for low voltage (1.2V to
3.6V) V
CC
applications with I/O capability up to 3.6V.
The 74VCX16244 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
)
r
24 mA @ 3.0V V
CC
s
Uses proprietary noise/EMI reduction circuitry
s
Latch-up performance exceeds 300 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 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
74VCX16244G
(Note 2)(Note 3)
74VCX16244MTD
(Note 3)
Package Number
BGA54A
MTD48
Package Description
54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Note 2:
Ordering Code “G” indicates Tray.
Note 3:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
© 2005 Fairchild Semiconductor Corporation
DS012168
www.fairchildsemi.com
74VCX16244
Logic Symbol
Pin Descriptions
Pin Names
OE
n
I
0
–I
15
O
0
–O
15
NC
Description
Output Enable Input (Active LOW)
Inputs
Outputs
No Connect
Connection Diagrams
Pin Assignment for TSSOP
FBGA Pin Assignments
1
A
B
C
D
E
F
G
H
J
O
0
O
2
O
4
O
6
O
8
O
10
O
12
O
14
O
15
2
NC
O
1
O
3
O
5
O
7
O
9
O
11
O
13
NC
3
OE
1
NC
V
CC
GND
GND
GND
V
CC
NC
OE
4
4
OE
2
NC
V
CC
GND
GND
GND
V
CC
NC
OE
3
5
NC
I
1
I
3
I
5
I
7
I
9
I
11
I
13
NC
6
I
0
I
2
I
4
I
6
I
8
I
10
I
12
I
14
I
15
Truth Tables
Inputs
OE
1
L
L
H
Inputs
OE
3
L
L
Pin Assignment for FBGA
H
Inputs
OE
2
L
L
H
Inputs
OE
4
L
(Top Thru View)
L
H
I
12
-I
15
L
H
X
I
4
-I
7
L
H
X
I
8
-I
11
L
H
X
I
0
–I
3
L
H
X
Outputs
O
0
–O
3
L
H
Z
Outputs
O
8
–O
11
L
H
Z
Outputs
O
4
-O
7
L
H
Z
Outputs
O
12
-O
15
L
H
Z
H HIGH Voltage Level
L LOW Voltage Level
X Immaterial (HIGH or LOW, inputs may not float)
Z High Impedance
www.fairchildsemi.com
2
74VCX16244
Functional Description
The 74VCX16244 contains sixteen 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 16-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 Diagram
3
www.fairchildsemi.com
74VCX16244
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
r
50 mA
r
100 mA
65
q
C to
150
q
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
V
CC
V
CC
V
CC
V
CC
3.0V to 3.6V
2.3V to 2.7V
1.65V to 2.3V
1.4V to 1.6V
1.2V
0.0V to V
CC
0.0V to 3.6V
1.2V to 3.6V
0.3V to
3.6V
Free Air Operating Temperature (T
A
)
Minimum Input Edge Rate (
'
t/
'
V)
V
IN
0.8V to 2.0V, V
CC
3.0V
r
24 mA
r
18 mA
r
6 mA
r
2 mA
r
100
P
A
40
q
C to
85
q
C
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.
DC Electrical Characteristics
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
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
2.0
1.6
0.65
u
V
CC
0.65
u
V
CC
0.65 x V
CC
0.8
0.7
0.35
u
V
CC
0.35
u
V
CC
0.05 x V
CC
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
V
V
Min
Max
Units
100
P
A
12 mA
18 mA
24 mA
100
P
A
6 mA
12 mA
18 mA
100
P
A
6 mA
100
P
A
2 mA
100
P
A
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
www.fairchildsemi.com
4
74VCX16244
DC Electrical Characteristics
Symbol
V
OL
Parameter
LOW Level Output Voltage
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
I
I
OZ
I
OFF
I
I
CC
Input Leakage Current
3-STATE Output Leakage
Power-OFF Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
(Continued)
V
CC
(V)
100
P
A
12 mA
18 mA
24 mA
100
P
A
12 mA
18 mA
100
P
A
6 mA
100
P
A
2 mA
100
P
A
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
0.2
0.4
0.4
0.55
0.2
0.4
0.6
0.2
0.3
0.2
0.35
0.05
V
Conditions
Min
Max
Units
0
d
V
I
d
3.6V
0
d
V
O
d
3.6V
V
I
V
I
V
IH
V
IH
or V
IL
V
CC
or GND
V
CC
0.6V
0
d
(V
I
, V
O
)
d
3.6V
V
CC
d
(V
I
, V
O
)
d
3.6V (Note 7)
r
5.0
r
10.0
10.0
20.0
P
A
P
A
P
A
P
A
P
A
r
20.0
750
'
I
CC
Note 7:
Outputs disabled or 3-STATE only.
AC Electrical Characteristics
Symbol
t
PHL
t
PLH
C
L
t
PZL
t
PZH
C
L
t
PLZ
t
PHZ
C
L
t
OSHL
t
OSLH
Output to Output Skew
(Note 9)
C
L
Note 8:
For C
L
(Note 8)
Conditions
V
CC
(V)
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
T
A
Parameter
Propagation Delay
C
L
40
q
C to
85
q
C
Max
2.5
3.0
6.0
12.0
30.0
3.5
4.1
8.2
16.4
41.0
3.5
3.8
6.8
13.6
34.0
0.5
0.5
0.75
1.5
1.5
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
Min
Units
Figure
Number
Figures
1, 2
30 pF, R
L
500
:
ns
Figures
5, 6
Figures
1, 3, 4
ns
Figures
5, 7, 8
Figures
1, 3, 4
ns
Figures
5, 7, 8
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
1.2
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
Output Enable Time
C
L
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
1.2
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
Output Disable Time
C
L
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
1.2
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
C
L
ns
15 pF, R
L
2k
:
1.5
r
0.1
1.2
50
P
F, add approximately 300 ps to the AC maximum specification.
Note 9:
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
OSHL
) or LOW-to-HIGH (t
OSLH
).
5
www.fairchildsemi.com
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
