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54ACTQ16541
16-Bit Buffer/Line Driver with TRI-STATE Outputs
General Description
The ’ACTQ16541 contains sixteen non-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 separate TRI-STATEcontrolinputs which can be shorted together
for full 16-bit operation.
The ’ACTQ16541 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 ’ACTQ541
n Outputs source/sink 24 mA
Logic Symbol
Pin Description
Pin Names Description
OE
n
Output Enable Input (Active Low)
I
0–I15
Inputs
O
0–O15
Outputs
Connection Diagram
GTO™is a trademark of National Semiconductor Corporation.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT
™
and FACT Quiet Series™are trademarks of Fairchild Semiconductor Corporation.
DS010936-1
Pin Assignment for CERPAK
DS010936-2
September 1998
54ACTQ16541 16-Bit Buffer/Line Driver with TRI-STATE Outputs
© 1998 National Semiconductor Corporation DS010936 www.national.com
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Functional Description
The ’ACTQ16541 contains sixteen non-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 can 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 OEnis
LOW, the outputs are in 2-state mode. When OEnis HIGH,
the outputs are in the high impedance mode, but this does
not interfere with entering new data into the inputs.
Truth Tables
Inputs Outputs
OE
1
OE
2
I0–I
7
O0–O
7
LL H H
HX X Z
XH X Z
LL L L
Inputs Outputs
OE
3
OE
4
I8–I
15
O8–O
15
LL H H
HX X Z
XH X Z
LL L L
H = High Voltage Level
L = Low Voltage Level
X = Immaterial
Z = High Impedance
Logic Diagram
DS010936-3
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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=VCC
+ 0.5V +20 mA
DC Output Diode Current (I
OK
)
V
O
= −0.5V −20 mA
V
O=VCC
+ 0.5V +20 mA
DC Output Voltage (V
O
) −0.5V to VCC+ 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 +175˚C
Storage Temperature −65˚C to +150˚C
Recommended Operating
Conditions
Supply Voltage (VCC)
’ACTQ 4.5V to 5.5V
Input Voltage (V
I
) 0VtoV
CC
Output Voltage (VO) 0VtoV
CC
Operating Temperature (TA):
54ACTQ −55˚C to +125˚C
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 recommend operation of FACT
™
circuits outside databook specifications.
DC Electrical Characteristics for ’ACTQ Family Devices
Symbol Parameter V
CC
(V)
54ACTQ Units Conditions
T
A
= −55˚C
to +125˚C
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 µA
Output Voltage 5.5 5.4
(Note 2)
V
IN=VIL
or V
IH
4.5 3.70 V IOH= −24 mA
5.5 4.70 I
OH
= −24 mA
V
OL
Maximum Low 4.5 0.1 V I
OUT
=50µA
Output Voltage 5.5 0.1
(Note 2)
V
IN=VIL
or V
IH
4.5 0.50 V IOL=24mA
5.5 0.50 I
OL
=24mA
I
OZ
Maximum
TRI-STATE
5.5
±
10.0 µA
V
I=VIL,VIH
Leakage Current VO=VCC, GND
I
IN
Maximum Input 5.5
±
1.0 µA VI=VCC, GND
Leakage Current
I
CCT
Maximum ICC/Input 5.5 1.6 mA VI=VCC− 2.1V
I
CC
Max Quiescent 5.5 160.0 µA VIN=VCCor GND
Supply Current
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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DC Electrical Characteristics for ’ACTQ Family Devices (Continued)
Symbol Parameter V
CC
(V)
54ACTQ Units Conditions
T
A
= −55˚C
to +125˚C
Guaranteed Limits
V
OLP
Quiet Output 5.0 1.2 V
Maximum Dynamic
V
OL
(Note 4)
V
OLV
Quiet Output 5.0 -1.2 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
=
−55˚C to +125˚C
C
L
=50pF
Min Max
t
PLH
, Propagation Delay 5.0 3.0 10.3 ns
t
PHL
Data to Output 3.0 10.0
t
PZH
, Output Enable Time 5.0 3.0 10.5 ns
t
PZL
3.0 11.5
t
PHZ
, Output Disable Time 5.0 3.0 11.0 ns
t
PLZ
3.0 11.0
Note 5: Voltage Range 5.0 is 5.0V±0.5V.
Capacitance
Symbol Parameter Max Units Conditions
C
IN
Input Capacitance 5 pF VCC= 5.0V
C
PD
Power Dissipation
Capacitance
100 pF VCC= 5.0V
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Physical Dimensions inches (millimeters) unless otherwise noted
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48-Lead CERPAC
NS Package Number WA48A
54ACTQ16541 16-Bit Buffer/Line Driver with TRI-STATE 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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