2003 Fairchild Semiconductor Corporation
DS500230
www.fairchildsemi.com
November 1999
Revised August 2003
7
4
VC
XH162
44
Low V
o
l
t
a
ge
16
-Bit
B
u
ff
er/
L
ine Dri
ver wit
h
Bushol
d
74VCXH16244
Low Voltage 16-Bit Buffer/Line Driver with Bushold
General Description
The VCXH16244 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 VCXH16244 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 74VCXH16244 is designed for low voltage (1.2V to
3.6V) V
CC
applications with output capability up to 3.6V.
The 74VCXH16244 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 control inputs and outputs
s
Bushold on data inputs eliminating the need for external
pull-up/pull-down resistors
s
t
PD
2.5 ns max for 3.0V to 3.6V V
CC
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
Also packaged in plastic Fine-Pitch Ball Grid Array
(FBGA) (Preliminary)
Ordering Code:
Note 1: Ordering Code "G" indicates Tray.
Note 2: Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Logic Symbol
Order Number
Package Number
Package Description
74VCXH16244G
(Note 1)(Note 2)
BGA54A
(Preliminary)
54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
74VCXH16244MTD
(Note 2)
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
3
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7
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VC
XH162
44
Functional Description
The 74VCXH16244 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
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4
74VCXH16244
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 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 4: I
O
Absolute Maximum Rating must be observed.
Note 5: Floating or unused control inputs must be held HIGH or LOW.
DC Electrical Characteristics
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-STATED
-
0.5V to
+
4.6V
Outputs Active (Note 4)
-
0.5V 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 GND Current per
Supply Pin (I
CC
or GND)
100 mA
Storage Temperature Range (T
STG
)
-
65
C to
+
150
C
Power Supply
Operating
1.2V to 3.6V
Input Voltage
-
0.3V to
+
3.6V
Output Voltage (V
O
)
Output in Active States
0.0V 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
V
CC
=
1.4V to 1.6V
2 mA
V
CC
=
1.2V
100
A
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
2.7 - 3.6
2.0
V
2.3 - 2.7
1.6
1.65 - 2.3
0.65 x V
CC
1.4 - 1.6
0.65 x V
CC
1.2
0.65 x V
CC
V
IL
LOW Level Input Voltage
2.7 - 3.6
0.8
V
2.3 - 2.7
0.7
1.65 - 2.3
0.35 x V
CC
1.4 - 1.6
0.35 x V
CC
1.2
0.05 x V
CC
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
2.7 - 3.6
V
CC
- 0.2
V
I
OH
=
-
12 mA
2.7
2.2
I
OH
=
-
18 mA
3.0
2.4
I
OH
=
-
24 mA
3.0
2.2
I
OH
=
-
100
A
2.3 - 2.7
V
CC
- 0.2
I
OH
=
-
6 mA
2.3
2.0
I
OH
=
-
12 mA
2.3
1.8
I
OH
=
-
18 mA
2.3
1.7
I
OH
=
-
100
A
1.65 - 2.3
V
CC
- 0.2
I
OH
=
-
6 mA
1.65
1.25
I
OH
=
-
100
A
1.4 - 1.6
V
CC
- 0.2
I
OH
=
-
2 mA
1.4
1.05
I
OH
=
-
100
A
1.2
V
CC
- 0.2
5
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VC
XH162
44
DC Electrical Characteristics
(Continued)
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.
Note 8: Outputs disabled or 3-STATE only.
Symbol
Parameter
Conditions
V
CC
Min
Max
Units
(V)
V
OL
LOW Level Output Voltage
I
OL
=
100
A
2.7 - 3.6
0.2
V
I
OL
=
12 mA
2.7
0.4
I
OL
=
18 mA
3.0
0.4
I
OL
=
24 mA
3.0
0.55
I
OL
=
100
A
2.3 - 2.7
0.2
I
OL
=
12 mA
2.3
0.4
I
OL
=
18 mA
2.3
0.6
I
OL
=
100
A
1.65 - 2.3
0.2
I
OL
=
6 mA
1.65
0.3
I
OL
=
100
A
1.4 - 1.6
0.2
I
OL
=
2 mA
1.4
0.35
I
OL
=
100
A
1.2
0.05
I
I
Input Leakage Current
Control Pins
0
V
I
3.6V
1.2 - 3.6
5.0
A
Data Pins
V
I
=
V
CC
or GND
1.2 - 3.6
5.0
A
I
I(HOLD)
Bushold Input Minimum
V
IN
=
0.8V
3.0
75.0
A
Drive Hold Current
V
IN
=
2.0V
3.0
-
75.0
V
IN
=
0.7V
2.3
45.0
V
IN
=
1.6V
2.3
-
45.0
V
IN
=
0.57V
1.65
25.0
V
IN
=
1.07V
1.65
-
25.0
I
I(OD)
Bushold Input Over-Drive
(Note 6)
3.6
450
A
Current to Change State
(Note 7)
3.6
-
450
(Note 6)
2.7
300
(Note 7)
2.7
-
300
(Note 6)
1.95
200
(Note 7)
1.95
-
200
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
2.7 - 3.6
10.0
A
V
I
=
V
IH
or V
IL
I
OFF
Power-OFF Leakage Current
0
(V
O
)
3.6V
0
10.0
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
1.2 - 3.6
20.0
A
V
CC
(V
O
)
3.6V (Note 8)
1.2 - 3.6
20.0
A
I
CC
Increase in I
CC
per Input
V
IH
=
V
CC
-
0.6V
2.7 - 3.6
750
A
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