54ACTQ16540
16-Bit Inverting Buffer/Line Driver
with TRI-STATE
Outputs
General Description
The 'ACTQ16540 contains sixteen inverting buffers with
TRI-STATE outputs designed to be employed as a memory
and address driver, clock driver, or bus-oriented transmitter/
receiver. The device is byte controlled. Each byte has sepa-
rate TRI-STATE control inputs which can be shorted together
for full 16-bit operation.
The 'ACTQ16540 utilizes NSC Quiet Series technology to
guarantee quiet output switching and improved dynamic
threshold performance. FACT Quiet Series
features GTO
output control for superior performance.
Features
n
Utilizes NSC FACT Quiet Series technology
n
Guaranteed simultaneous switching noise level and
dynamic threshold performance
n
Separate control logic for each byte
n
16-bit version of the 'ACTQ540
n
Outputs source/sink 24 mA
n
Additional specs for multiple output switching
Logic Symbol
Pin Description
Pin
Description
Names
OE
n
Output Enable Input (Active Low)
I
0
I
15
Inputs
O
0
O
15
Outputs
Connection Diagram
GTO
TM
is a trademark of National Semiconductor Corporation.
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
FACT
TM
and FACT Quiet Series
TM
are trademarks of Fairchild Semiconductor Corporation.
DS010927-1
Pin Assignment
for CERPAK
DS010927-2
September 1998
54ACTQ16540
16-Bit
Inverting
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
1998 National Semiconductor Corporation
DS010927
www.national.com
Functional Description
The 'ACTQ16540 contains sixteen inverting buffers with
TRI-STATE standard outputs. The device is byte controlled
with each byte functioning identically, but independent of the
other. The control pins may be shorted together to obtain full
16-bit operation. The TRI-STATE outputs are controlled by
an Output Enable (OE
n
) input for each byte. When OE
n
is
LOW, the outputs are in 2-state mode. When OE
n
is HIGH,
the outputs are in the high impedance mode, but this does
not interfere with entering new data into the inputs.
Logic Diagram
Truth Table
Inputs
Outputs
OE
1
OE
2
I
0
I
7
O
0
O
7
L
L
H
L
H
X
X
Z
X
H
X
Z
L
L
L
H
Inputs
Outputs
OE
3
OE
4
I
8
I
15
O
8
O
15
L
L
H
L
H
X
X
Z
X
H
X
Z
L
L
L
H
H = High Voltage Level
L = Low Voltage Level
X = Immaterial
Z = High Impedance
DS010927-3
www.national.com
2
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)
-0.5V to +7.0V
DC Input Diode Current (I
IK
)
V
I
= -0.5V
-20 mA
V
I
= V
CC
+ 0.5V
+20 mA
DC Output Diode Current (I
OK
)
V
O
= -0.5V
-20 mA
V
O
= V
CC
+ 0.5V
+20 mA
DC Output Voltage (V
O
)
-0.5V to V
CC
+ 0.5V
DC Output Source/Sink Current (I
O
)
50 mA
DC V
CC
or Ground Current
per Output Pin
50 mA
Junction Temperature
CDIP
+175C
Storage Temperature
-65C to +150C
Recommended Operating
Conditions
Supply Voltage (V
CC
)
'ACTQ
4.5V to 5.5V
Input Voltage (V
I
)
0V to V
CC
Output Voltage (V
O
)
0V to V
CC
Operating Temperature (T
A
):
54ACTQ
-55C to +125C
Minimum Input Edge Rate (dV/dt)
'ACTQ Devices
125 mV/ns
V
IN
from 0.8V to 2.0V
V
CC
@
4.5V, 5.5V
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recom-
mend operation of FACT
TM
circuits outside databook specifications.
DC Electrical Characteristics for 'ACTQ Family Devices
Symbol
Parameter
V
CC
(V)
54ACTQ
Units
Conditions
T
A
= -55C
to +125C
Guaranteed Limits
V
IH
Minimum High
4.5
2.0
V
V
OUT
= 0.1V
Input Voltage
5.5
2.0
or V
CC
- 0.1V
V
IL
Maximum Low
4.5
0.8
V
V
OUT
= 0.1V
Input Voltage
5.5
0.8
or V
CC
- 0.1V
V
OH
Minimum High
4.5
4.4
V
I
OUT
= -50 A
Output Voltage
5.5
5.4
(Note 2)
V
IN
= V
IL
or V
IH
4.5
3.70
V
I
OH
= -24 mA
5.5
4.70
I
OH
= -24 mA
V
OL
Maximum Low
4.5
0.1
V
I
OUT
= 50 A
Output Voltage
5.5
0.1
(Note 2)
V
IN
= V
IL
or V
IH
4.5
0.50
V
I
OL
= 24 mA
5.5
0.50
I
OL
= 24 mA
I
OZ
Maximum
5.5
10.0
A
V
I
= V
IL
, V
IH
TRI-STATE
Leakage Current
V
O
= V
CC
, GND
I
IN
Maximum Input
5.5
1.0
A
V
I
= V
CC
, GND
Leakage Current
I
CCT
Maximum I
CC
/Input
5.5
1.6
mA
V
I
= V
CC
- 2.1V
I
CC
Max Quiescent
V
IN
= V
CC
Supply Current
5.5
160.0
A
or GND
I
OLD
Minimum Dynamic
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
Output Current
(Note 3)
-50
mA
V
OHD
= 3.85V Min
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3
DC Electrical Characteristics for 'ACTQ Family Devices
(Continued)
Symbol
Parameter
V
CC
(V)
54ACTQ
Units
Conditions
T
A
= -55C
to +125C
Guaranteed Limits
V
OLP
Quiet Output
5.0
0.8
V
Maximum Dynamic
V
OL
(Note 4)
V
OLV
Quiet Output
5.0
-0.8
V
Minimum Dynamic
V
OL
(Note 4)
Note 2: All outputs loaded; thresholds associated with output under test.
Note 3: Maximum test duration 2.0 ms; one output loaded at a time.
Note 4: Maximum number of outputs that can switch simultaneously is n. (n - 1) outputs are switched HIGH and one output held HIGH.
AC Electrical Characteristics
Symbol
Parameter
V
CC
(V)
(Note 5)
54ACTQ
Units
T
A
= -55C to +125C
C
L
= 50 pF
Min
Max
t
PLH
,
Propagation Delay
5.0
3.0
9.0
ns
t
PHL
Data to Output
3.0
9.5
t
PZH
,
Output Enable
5.0
3.0
10.0
ns
t
PZL
Time
3.0
11.0
t
PHZ
,
Output Disable
5.0
2.5
10.5
ns
t
PLZ
Time
2.5
10.5
Note 5: Voltage Range 5.0 is 5.0V
0.5V.
Capacitance
Symbol
Parameter
Typ
Units
Conditions
C
IN
Input Pin Capacitance
4.5
pF
V
CC
= 5.0V
C
PD
Power Dissipation
30
pF
V
CC
= 5.0V
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4
Physical Dimensions
inches (millimeters) unless otherwise noted
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with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
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48-Lead CERPAK (F)
NS Package Number WA48A
54ACTQ16540
16-Bit
Inverting
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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