54FCT241
Octal Buffer/Line Driver with TRI-STATE
Outputs
General Description
The FCT241 is an octal buffer and line driver with 3-STATE
outputs designed to be employed as a memory and address
driver, clock driver, or bus-oriented transmitter/receiver.
Features
n
TTL input and output level compatible
n
CMOS power consumption
n
Non-inverting buffers
n
Output sink capability of 48 mA, source capability of
12 mA
Ordering Code
Military
Package Number
Package Description
54FCT241DMQB
J20A
20-Lead Ceramic Dual-In-Line
54FCT241FMQB
W20A
20-Lead Cerpack
54FCT241LMQB
E20A
20-Lead Ceramic Leadless Chip Carrier, Type C
Connection Diagram
Pin Names
Description
OE
1
Output Enable Input (Active Low)
OE
2
Output Enable Input (Active High)
I
0
I
7
Inputs
O
0
O
7
Outputs
OE
1
I
03
O
03
OE
2
I
47
O
47
H
X
Z
L
X
Z
L
H
H
H
H
H
L
L
L
H
L
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 for
DIP and Cerpack
DS100954-1
Pin Assignment for LCC
DS100954-4
August 1998
54FCT241
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
1999 National Semiconductor Corporation
DS100954
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
(Over Comm Operating Range)
-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
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.
DC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
Units
V
CC
Conditions
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
= -3 mA
54FCT
2.4
V
Min
I
OH
= -12 mA
V
OL
Output LOW Voltage
54FCT
0.2
V
Min
I
OL
= 300 uA
54FCT
0.5
V
Min
I
OL
= 48 mA
I
IH
Input HIGH Current
5
A
Max
V
IN
= 2.7V (Note 3)
5
V
IN
= V
CC
I
IL
Input LOW Current
-5
A
Max
V
IN
= 0.5V (Note 3)
-5
V
IN
= 0.0V
I
OZH
Output Leakage Current
10
A
0 - 5.5V
V
OUT
= 2.7V; OE
n
= 2.0V
I
OZL
Output Leakage Current
-10
A
0 - 5.5V
V
OUT
= 0.5V; OE
n
= 2.0V
I
OS
Output Short-Circuit Current
-60
mA
Max
V
OUT
= 0.0V
I
CCH
Power Supply Current
160
A
Max
All Outputs HIGH
I
CCL
Power Supply Current
160
A
Max
All Outputs LOW
I
CCZ
Power Supply Current
160
A
Max
OE
n
= V
CC
, All Others at V
CC
or Ground
I
CCT
Additional I
CC
/Input
Outputs Enabled
2.0
mA
Max
V
I
= V
CC
- 2.1V
I
CCD
Dynamic I
CC
No Load
0.4
mA/
MHz
Max
Outputs Open, OE
n
= GND,
One Bit Toggling, 50% Duty
Cycle
Note 3: Guaranteed, but not tested.
54FCT241
www.national.com
2
AC Electrical Characteristics
Symbol
Parameter
T
A
= -55C to +125C
Units
Fig.
No.
V
CC
= 4.5V5.5V
C
L
= 50 pF
Min
Max
t
PLH
Propagation Delay
1.5
9.0
ns
t
PHL
Data to Outputs
1.5
9.0
t
PZH
Output Enable
1.5
9.5
ns
t
PZL
Time
1.5
12.5
t
PHZ
Output Disable
1.5
11.5
ns
t
PLZ
Time
1.5
11.5
Capacitance
Symbol
Parameter
Max
Units
Conditions
T
A
= 25C
C
IN
Input Capacitance
10.0
pF
V
CC
= 0V
C
OUT
(Note 4)
Output Capacitance
12.0
pF
V
CC
= 5.0V
Note 4: C
OUT
is measured at frequency f = 1 MHz, per MIL-STD-883B, Method 3012.
54FCT241
www.national.com
3
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Ceramic Leadless Chip Carrier
Package Number E20A
20-Lead Ceramic Dual-In-Line
Package Number J20A
54FCT241
www.national.com
4
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
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DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
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 Flatpack
Package Number W20A
54FCT241
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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