2000 Fairchild Semiconductor Corporation
DS500232
www.fairchildsemi.com
December 1999
Revised March 2000
7
4
VC
XH162
40 Low
V
o
l
t
age 16
-Bit
Inver
ti
ng Buf
f
e
r
/L
ine
Dri
ver
74VCXH16240
Low Voltage 16-Bit Inverting Buffer/Line Driver
with Bushold
General Description
The VCXH16240 contains sixteen 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 sep-
arate 3-STATE control inputs which can be shorted
together for full 16-bit operation.
The VCXH16240 data inputs include active bushold cir-
cuitry, eliminating the need for external pull-up resistors to
hold unused or floating inputs at a valid logic level.
The 74VCXH16240 is designed for low voltage (1.65V to
3.6V) V
CC
applications with output capability up to 3.6V.
The 74VCXH16240 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 control inputs and outputs
s
Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
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
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
Latch-up performance exceeds 300 mA
s
ESD performance:
Human body model
>
2000V
Machine model
>
200V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Logic Symbol
Pin Descriptions
Order Number
Package
Package Descriptions
Number
74VCXH16240MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Pin Names
Description
OE
n
Output Enable Input (Active LOW)
I
0
I
15
Bushold Inputs
O
0
O
15
Outputs
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2
74VCXH16240
Connection Diagram
Truth Tables
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial (HIGH or LOW, inputs may not float)
Z
=
High Impedance
Functional Description
The 74VCXH16240 contains sixteen inverting buffers with
3-STATE outputs. The device is nibble (4 bits) controlled
with each nibble functioning identically, but independent of
each other. The control pins may be shorted together to
obtain full 16-bit operation.The 3-STATE outputs are con-
trolled 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 impedance
mode but this does not interfere with entering new data into
the inputs.
Logic Diagram
Inputs
Outputs
OE
1
I
0
I
3
O
0
O
3
L
L
H
L
H
L
H
X
Z
Inputs
Outputs
OE
2
I
4
I
7
O
4
O
7
L
L
H
L
H
L
H
X
Z
Inputs
Outputs
OE
3
I
8
I
11
O
8
O
11
L
L
H
L
H
L
H
X
Z
Inputs
Outputs
OE
4
I
12
I
15
O
12
O
15
L
L
H
L
H
L
H
X
Z
3
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7
4
VC
XH162
40
Absolute Maximum Ratings
(Note 1)
Recommended Operating
Conditions
(Note 3)
Note 1: 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 2: I
O
Absolute Maximum Rating must be observed.
Note 3: Floating or unused control inputs must be held HIGH or LOW.
DC Electrical Characteristics (2.7V
<
V
CC
3.6V)
Note 4: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 5: An external driver must source at least the specified current to switch from HIGH-to-LOW.
Note 6: Outputs disabled or 3-STATE only.
Supply Voltage (V
CC
)
-
0.5V to
+
4.6V
DC Input Voltage (V
I
)
OE
n
-
0.5V to 4.6V
I
0
I
15
-
0.5V to V
CC
+
0.5V
Output Voltage (V
O
)
Outputs 3-STATED
-
0.5V to
+
4.6V
Outputs Active (Note 2)
-
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
1.65V to 3.6V
Data Retention Only
1.2V to 3.6V
Input Voltage
-
0.3V to V
CC
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
2.7
-
3.6
2.0
V
V
IL
LOW Level Input Voltage
2.7
-
3.6
0.8
V
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
V
I
OH
=
-
18 mA
3.0
2.4
V
I
OH
=
-
24 mA
3.0
2.2
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
V
I
OL
=
18 mA
3.0
0.4
V
I
OL
=
24 mA
3.0
0.55
V
I
I
Input Leakage Current
Control Pins
0
V
I
3.6V
2.7
-
3.6
5.0
A
Data Pins
V
I
=
V
CC
or GND
2.7
-
3.6
5.0
A
I
I(HOLD)
Bushold Input Minimum
V
IN
=
0.8V
3.0
75
A
Drive Hold Current
V
IN
=
2.0V
3.0
-
75
I
I(OD)
Bushold Input Over-Drive
(Note 4)
3.6
450
A
Current to Change State
(Note 5)
3.6
-
450
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
2.7
-
3.6
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power-OFF Leakage Current
0
(V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.7
-
3.6
20
A
V
CC
(V
O
)
3.6V (Note 6)
2.7
-
3.6
20
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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4
74VCXH16240
DC Electrical Characteristics (2.3V
V
CC
2.7V)
Note 7: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 8: An external driver must source at least the specified current to switch from HIGH-to-LOW.
Note 9: Outputs disabled or 3-STATE only.
DC Electrical Characteristics (1.65V
V
CC
<
2.3V)
Note 10: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 11: An external driver must source at least the specified current to switch from HIGH-to-LOW.
Note 12: Outputs disabled or 3-STATE only.
Symbol
Parameter
Conditions
V
CC
Min
Max
Units
(V)
V
IH
HIGH Level Input Voltage
2.3
-
2.7
1.6
V
V
IL
LOW Level Input Voltage
2.3
-
2.7
0.7
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
2.3
-
2.7
V
CC
-
0.2
V
I
OH
=
-
6 mA
2.3
2.0
V
I
OH
=
-
12 mA
2.3
1.8
V
I
OH
=
-
18 mA
2.3
1.7
V
V
OL
LOW Level Output Voltage
I
OL
=
100
A
2.3
-
2.7
0.2
V
I
OL
=
12 mA
2.3
0.4
V
I
OL
=
18 mA
2.3
0.6
V
I
I
Input Leakage Current
Control Pins
0
V
I
3.6V
2.3
-
2.7
5.0
A
Data Pins
V
I
=
V
CC
or GND
2.3
-
2.7
5.0
A
I
I(HOLD)
Bushold Input Minimum
V
IN
=
0.7V
2.3
45
A
Drive Hold Current
V
IN
=
1.6V
2.3
-
45
I
I(OD)
Bushold Input Over-Drive
(Note 7)
2.7
300
A
Current to Change State
(Note 8)
2.7
-
300
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
2.3
-
2.7
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power-OFF Leakage Current
0
(V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.3
-
2.7
20
A
V
CC
(V
O
)
3.6V (Note 9)
2.3
-
2.7
20
A
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
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
V
I
I
Input Leakage Current
Control Pins
0
V
I
3.6V
1.65 - 2.3
5.0
A
Data Pins
V
I
=
V
CC
or GND
1.65 - 2.3
5.0
A
I
I(HOLD)
Bushold Input Minimum
V
IN
=
0.57V
1.65
25
A
Drive Hold Current
V
IN
=
1.07V
1.65
-
25
I
I(OD)
Bushold Input Over-Drive
(Note 10)
1.95
200
A
Current to Change State
(Note 11)
1.95
-
200
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
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
1.65 - 2.3
20
A
V
CC
(V
O
)
3.6V (Note 12)
1.65
-
2.3
20
A
5
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7
4
VC
XH162
40
AC Electrical Characteristics
(Note 13)
Note 13: For C
L
=
50
P
F, add approximately 300 ps to the AC maximum specification.
Note 14: 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
).
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
=
2.5V
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
3.5
1.0
4.1
1.5
8.2
ns
t
PLZ
, t
PHZ
Output Disable Time
0.8
3.5
1.0
3.8
1.5
6.8
ns
t
OSHL
Output to Output Skew
0.5
0.5
0.75
ns
t
OSLH
(Note 14)
Symbol
Parameter
Conditions
V
CC
T
A
=
+
25
C
Units
(V)
Typical
V
OLP
Quiet Output Dynamic Peak V
OL
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
0.25
V
2.5
0.6
3.3
0.8
V
OLV
Quiet Output Dynamic Valley V
OL
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
-
0.25
V
2.5
-
0.6
3.3
-
0.8
V
OHV
Quiet Output Dynamic Valley V
OH
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
1.5
V
2.5
1.9
3.3
2.2
Symbol
Parameter
Conditions
T
A
=
+
25
C
Units
Typical
C
IN
Input Capacitance
V
CC
=
1.8, 2.5V or 3.3V, V
I
=
0V or V
CC
6
pF
C
OUT
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, V
CC
=
1.8V, 2.5V or 3.3V
20
pF
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