54FCT540
Octal Buffer/Line Driver with TRI-STATE
Outputs
General Description
The 'FCT540 is an octal buffer/line drivers designed to be
employed as memory and address drivers, clock drivers and
bus oriented transmitter/receivers.
These devices are similar in function to the 'FCT240 while
providing flow-through architecture (inputs on opposite side
from outputs). This pinout arrangement makes these devices
especially useful as output ports for microprocessors, allow-
ing ease of layout and greater PC board density.
Features
n
TRI-STATE inverting outputs
n
Inputs and outputs opposite side of package, allowing
easier interface to microprocessors
n
TTL input and output level compatible
n
CMOS power consumption
n
Output sink capability of 48mA, source capability of 12
mA
n
Standard Microcircuit Drawing (SMD) 5962-8976701
Logic Symbol
Inputs
Outputs
OE
1
OE
2
I
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
Connection Diagrams
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
FACT
TM
is a trademark of Fairchild Semiconductor Corporation.
IEEE/IEC
DS100970-1
Pin Assignment
for DIP and Flatpak
DS100970-3
Pin Assignment for LCC
DS100970-2
October 1999
54FCT540
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
1999 National Semiconductor Corporation
DS100970
www.national.com
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 Input Voltage (V
I
)
-0.5V to V
CC
+ 0.5V
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
or Sink Current (I
O
)
50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
50 mA
Storage Temperature (T
STG
)
-65C to +150C
Junction Temperature (T
J
)
CDIP
175C
Recommended Operating
Conditions
Supply Voltage (V
CC
)
'FCT
2.0V to 6.0V
Input Voltage (V
I
)
0V to V
CC
Output Voltage (V
O
)
0V to V
CC
Operating Temperature (T
A
)
54FCT
-55C to +125C
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
circuits outside databook specifications.
DC Characteristics for 'FCT Family Devices
Symbol
Parameter
FCT540
Units
V
CC
Conditions
Min
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
54FCT
4.3
V
Min
I
OH
= -300 A
54FCT
2.4
V
Min
I
OH
= -12 mA
V
OL
Output LOW Voltage
54FCT
0.2
V
Min
I
OL
= 300 A
54FCT
0.55
V
Min
I
OL
= 48 mA
I
IH
Input HIGH Current
5
A
Max
V
IN
= V
CC
I
IL
Input LOW Current
-5
A
Max
V
IN
= 0.0V
I
OZH
Output Leakage Current
10
A
Max
V
OUT
= 5.5V; OE
n
= 2.0V
I
OZL
Output Leakage Current
-10
A
Max
V
OUT
= 0.0V; OE
n
= 2.0V
I
OS
Output Short-Circuit Current
-60
mA
Max
V
OUT
= 0.0V
I
CCQ
Quiescent Power
Supply Current
1.5
mA
Max
V
IN
<
0.2V or V
IN
5.3V, V
CC
=
5.5V
I
CC
Quiescent Power
Supply Current
2.0
mA
Max
V
I
= V
CC
- 2.1V
I
CCD
Dynamic I
CC
0.4
mA/
MHz
Max
V
CC
= 5.5V, Outputs Open,
One Bit Toggling, 50% Duty
Cycle, OE
n
= GND
I
CC
Total Power Supply
Current
6.0
mA
Max
V
CC
= 5.5V, Outputs Open, fI
= 10MHz, OE
n
= GND, One
Bit Toggling, 50% Duty Cycle
Note 2: All outputs loaded; thresholds on input associated with output under test.
Note 3: Maximum test duration 2.0 ms, one output loaded at a time.
54FCT540
www.national.com
2
AC Electrical Characteristics
54FCT
T
A
= -55C to +125C
Symbol
Parameter
V
CC
= 4.5V5.5V
Units
C
L
= 50 pF
Min
Max
t
PLH
Propagation Delay
2.0
9.5
ns
t
PHL
Data to Outputs
2.0
9.5
t
PZH
Output Enable Time
2.0
12.5
ns
t
PZL
2.0
12.5
t
PHZ
Output Disable Time
2.0
12.5
ns
t
PLZ
2.0
12.5
Capacitance
Symbol
Parameter
Typ
Units
Conditions
C
IN
Input Capacitance
4.5
pF
V
CC
= OPEN
C
PD
Power Dissipation
30.0
pF
V
CC
= 5.0V
Capacitance
54FCT540
www.national.com
3
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Terminal Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
20-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J20A
54FCT540
www.national.com
4
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
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systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure 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 is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
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www.national.com
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
54FCT540
Octal
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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