54ABT541
Octal Buffer/Line Driver with TRI-STATE®Outputs
General Description
The ’ABT541 is an octal buffer and line driver with
TRI-STATE outputs designed to be employed as a memory
and address driver, clock driver, or bus-oriented transmitter/
receiver. The ’ABT541 is similar to the ’ABT244 with broad-
side pinout.
Features
nNon-inverting buffers
nOutput sink capability of 48 mA, source capability of
24 mA
nGuaranteed latchup protection
nHigh impedance glitch free bus loading during entire
power up and power down cycle
nNondestructive hot insertion capability
nFlow-through pinout for ease of PC board layout
nDisable time less than enable time to avoid bus
contention
nStandard Microcircuit Drawing (SMD) 5962-9471801
Ordering Code
Military Package Package Description
Number
54ABT541J-QML J20A 20-Lead Ceramic Dual-In-Line
54ABT541W-QML W20A 20-Lead Cerpack
54ABT541E-QML E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Connection Diagram Pin Names Description
OE
1
,OE
2
Output Enable Input (Active Low)
I
0
–I
7
Inputs
O
0
–O
7
Outputs
Truth Table
Inputs Outputs
OE
1
OE
2
I ABT541
LLH H
HXX Z
XHX Z
LLL L
H
=
HIGH Voltage Level
L=LOW Voltage Level
X=Immaterial
Z=High Impedance
TRI-STATE®is a registered trademark of National Semiconductor Corporation.
Pin Assignment
DIP and Cerpack
DS100217-1
Pin Assignment
LCC
DS100217-30
August 1998
54ABT541 Octal Buffer/Line Driver with TRI-STATE Outputs
© 1998 National Semiconductor Corporation DS100217 www.national.com
Absolute Maximum Ratings (Note 1)
Storage Temperature −65˚C to +150˚C
Ambient Temperature under Bias −55˚C to +125˚C
Junction Temperature under Bias
Ceramic −55˚C to +175˚C
V
CC
Pin Potential to
Ground Pin −0.5V to +7.0V
Input Voltage (Note 2) −0.5V to +7.0V
Input Current (Note 2) −30 mA to +5.0 mA
Voltage Applied to Any Output
in the Disabled or
Power-Off State −0.5V to 5.5V
in the HIGH State −0.5V to V
CC
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
DC Latchup Source Current −500 mA
Over Voltage Latchup (I/O) 10V
Recommended Operating
Conditions
Free Air Ambient Temperature
Military −55˚C to +125˚C
Supply Voltage
Military +4.5V to +5.5V
Minimum Input Edge Rate (∆V/∆t)
Data Input 50 mV/ns
Enable Input 20 mV/ns
DC Electrical Characteristics
Symbol Parameter ABT541 Units V
CC
Conditions
Min Typ Max
V
IH
Input HIGH Voltage 2.0 V Recognized HIGH Signal
V
IL
Input LOW Voltage 0.8 V Recognized LOW Signal
V
CD
Input Clamp Diode Voltage −1.2 V Min I
IN
=−18 mA
V
OH
Output HIGH Voltage 54ABT 2.5 V Min I
OH
=−3 mA
54ABT 2.0 V Min I
OH
=−24 mA
V
OL
Output LOW Voltage 54ABT 0.55 V Min I
OL
=48 mA
I
IH
Input HIGH Current 5 µA Max V
IN
=2.7V (Note 4)
5V
IN
=V
CC
I
BVI
Input HIGH Current 7 µA Max V
IN
=7.0V
Breakdown Test
I
IL
Input LOW Current −5 µA Max V
IN
=0.5V (Note 4)
−5 V
IN
=0.0V
V
ID
Input Leakage Test 4.75 V 0.0 I
ID
=1.9 µA
All Other Pins Grounded
I
OZH
Output Leakage Current 50 µA 0 − 5.5V V
OUT
=2.7V; OE
n
=2.0V
I
OZL
Output Leakage Current −50 µA 0 − 5.5V V
OUT
=0.5V; OE
n
=2.0V
I
OS
Output Short-Circuit Current −100 −275 mA Max V
OUT
=0.0V
I
CEX
Output High Leakage Current 50 µA Max V
OUT
=V
CC
I
ZZ
Bus Drainage Test 100 µA 0.0 V
OUT
=5.5V; All Others GND
I
CCH
Power Supply Current 50 µA Max All Outputs HIGH
I
CCL
Power Supply Current 30 mA Max All Outputs LOW
I
CCZ
Power Supply Current 50 µA Max OE
n
=V
CC
;
All Others at V
CC
or Ground
I
CCT
Additional I
CC
/Input Outputs Enabled 2.5 mA V
I
=V
CC
− 2.1V
Outputs TRI-STATE 2.5 mA Max Enable Input V
I
=V
CC
− 2.1V
Outputs TRI-STATE 50 µA Data Input V
I
=V
CC
− 2.1V;
All Others at V
CC
or Ground
I
CCD
Dynamic I
CC
No Load mA/ Max Outputs Open, OE
n
=GND,
(Note 4) 0.1 MHz One Bit Toggling (Note 3),
50%Duty Cycle
Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions
is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
Note 3: For 8 bits toggling, ICCD <0.8 mA/MHz.
Note 4: Guaranteed, but not tested.
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DC Electrical Characteristics
Symbol Parameter Min Max Units V
CC
Conditions
C
L
=50 pF, R
L
=500Ω
V
OLP
Quiet Output Maximum Dynamic V
OL
1.0 V 5.0 T
A
=25˚C (Note 5)
V
OLV
Quiet Output Minimum Dynamic V
OL
-1.45 V 5.0 T
A
=25˚C (Note 5)
Note 5: Max number of outputs defined as (n).n−1data inputs are driven 0V to 3V. One output at LOW. Guaranteed, but not tested.
AC Electrical Characteristics
54ABT
T
A
=−55˚C to +125˚C
Symbol Parameter V
CC
=4.5V–5.5V Units
C
L
=50 pF
Min Max
t
PLH
Propagation Delay 1.0 5.0 ns
t
PHL
Data to Outputs 1.0 5.3
t
PZH
Output Enable Time 1.1 7.2 ns
t
PZL
1.5 7.9
t
PHZ
Output Disable Time 1.5 7.5 ns
t
PLZ
1.5 7.9
Capacitance
Symbol Parameter Typ Units Conditions
T
A
=25˚C
C
IN
Input Capacitance 5.0 pF V
CC
=0.0V
C
OUT
(Note 6) Output Capacitance 9.0 pF V
CC
=5.0V
Note 6: COUT is measured at frequency of f =1 MHz, per MIL-STD-883B, Method 3012.
3 www.national.com
Capacitance (Continued)
t
PLH
vs Temperature (T
A
)
C
L
=50 pF, 1 Output Switching
DS100217-11
t
PHL
vs Temperature (T
A
)
C
L
=50 pF, 1 Output Switching
DS100217-12
t
PLH
vs Load Capacitance
1 Output Switching, T
A
=25˚C
DS100217-13
t
PHL
vs Load Capacitance
1 Output Switching, T
A
=25˚C
DS100217-14
t
PLH
vs Load Capacitance
8 Outputs Switching, T
A
=25˚C
DS100217-15
t
PHL
vs Load Capacitance
8 Outputs Switching, T
A
=25˚C
DS100217-16
Dashed lines represent design characteristics; for specified guarantees refer to AC Characteristics Table.
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Capacitance (Continued)
t
PZL
vs Temperature (T
A
)
C
L
=50 pF, 1 Output Switching
DS100217-17
t
PLZ
vs Temperature (T
A
)
C
L
=50 pF, 1 Output Switching
DS100217-18
t
PZL
vs Temperature (T
A
)
C
L
=50 pF, 8 Outputs Switching
DS100217-19
t
PLZ
vs Temperature (T
A
)
C
L
=50 pF, 8 Outputs Switching
DS100217-20
t
PZH
vs Temperature (T
A
)
C
L
=50 pF, 1 Output Switching
DS100217-21
t
PHZ
vs Temperature (T
A
)
C
L
=50 pF, 1 Output Switching
DS100217-22
Dashed lines represent design characteristics; for specified guarantees refer to AC Characteristics Table.
5 www.national.com
Capacitance (Continued)
t
PZH
vs Temperature (T
A
)
C
L
=50 pF, 8 Outputs Switching
DS100217-23
t
PHZ
vs Temperature (T
A
)
C
L
=50 pF, 8 Outputs Switching
DS100217-24
t
PZH
vs Load Capacitance
8 Outputs Switching, T
A
=25˚C
DS100217-25
t
PZL
vs Load Capacitance
8 Outputs Switching, T
A
=25˚C
DS100217-26
t
PLH
and t
PHL
vs Number Outputs Switching
V
CC
=5.0V, T
A
=25˚C, C
L
=50 pF
DS100217-27
I
CC
vs Frequency,
Average, T
A
=25˚C,
All Outputs Unloaded/Unterminated
DS100217-28
Dashed lines represent design characteristics; for specified guarantees refer to AC Characteristics Table.
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AC Loading
AC Waveforms
DS100217-3
*Includes jig and probe capacitance
FIGURE 1. Standard AC Test Load
DS100217-4
FIGURE 2. Test Input Signal Levels
Amplitude Rep. Rate t
w
t
r
t
f
3.0V 1 MHz 500 ns 2.5 ns 2.5 ns
FIGURE 3. Test Input Signal Requirements
DS100217-5
FIGURE 4. Propagation Delay Waveforms for
Inverting and Non-Inverting Functions
DS100217-7
FIGURE 5. TRI-STATE Output HIGH and LOW
Enable and Disable Time
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8
Physical Dimensions inches (millimeters) unless otherwise noted
20-Terminal Ceramic Chip Carrier
NS Package Number E20A
20-Lead Ceramic Dual-In-Line Package
NS Package Number J20A
9 www.national.com
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE-
VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI-
CONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or sys-
tems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, and whose fail-
ure to perform when properly used in accordance
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
device or system, or to affect its safety or effectiveness.
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Tel: 1-800-272-9959
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www.national.com
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20-Lead Ceramic Flatpack
NS Package Number W20A
54ABT541 Octal 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.
