54FCT541
Octal Buffer/Line Driver with TRI-STATE
Outputs
General Description
The 'FCT541 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 'FCT541 is similar to the 'FCT244 with broad-
side pinout.
Features
n
Non-inverting buffers
n
TTL input and output level compatible
n
CMOS power consumption
n
Output sink capability of 48 mA, source capability of
12 mA
n
Flow-through pinout for ease of PC board layout
n
Standard Microcircuit Drawing (SMD) 5962-8976601
Ordering Code
Military
Package
Package Description
Number
54FCT541DMQB
J20A
20-Lead Ceramic Dual-In-Line
54FCT541FMQB
W20A
20-Lead Cerpack
54FCT541LMQB
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
Inputs
Outputs
OE
1
OE
2
I
FCT541
L
L
H
H
H
X
X
Z
X
H
X
Z
L
L
L
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
TRI-STATE
is a registered trademark of FAirchild Semiconductor Corporation.
Pin Assignment
DIP and Cerpack
DS100953-1
Pin Assignment
LCC
DS100953-30
October 1999
54FCT541
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
1999 National Semiconductor Corporation
DS100953
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.
Storage Temperature
-65C to +150C
Ambient Temperature under Bias
-55C to +125C
Junction Temperature under Bias
Ceramic
-55C to +175C
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
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
-55C to +125C
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
FCT541
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
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,
OE
n
= GND
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.
54FCT541
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2
AC Electrical Characteristics
54FCT
T
A
= -55C to +125C
Fig.
Symbol
Parameter
V
CC
= 4.5V5.5V
Units
No.
C
L
= 50 pF
Min
Max
t
PLH
Propagation Delay
2.0
9.0
ns
Figure
4
t
PHL
Data to Outputs
2.0
9.0
t
PZH
Output Enable Time
2.0
12.5
ns
Figure
5
t
PZL
2.0
12.5
t
PHZ
Output Disable Time
2.0
12.5
ns
Figure
5
t
PLZ
2.0
12.5
Capacitance
Symbol
Parameter
Max
Units
Conditions
T
A
= 25C
C
IN
Input Capacitance
10.0
pF
V
CC
= 0.0V
C
OUT
(Note 3)
Output Capacitance
12.0
pF
V
CC
= 5.0V
Note 3: C
OUT
is measured at frequency of f = 1 MHz, per MIL-STD-883B, Method 3012.
54FCT541
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3
AC Loading
AC Waveforms
DS100953-3
*Includes jig and probe capacitance
FIGURE 1. Standard AC Test Load
DS100953-4
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
DS100953-5
FIGURE 4. Propagation Delay Waveforms for
Inverting and Non-Inverting Functions
DS100953-7
FIGURE 5. TRI-STATE Output HIGH and LOW
Enable and Disable Time
54FCT541
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4
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
54FCT541
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