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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–I7
Inputs
O
0–O7
Outputs
OE
1
I
0–3
O
0–3
OE
2
I
4–7
O
4–7
HX ZLX Z
LH HHH H
LL LHL 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-STATE Outputs
© 1999 National Semiconductor Corporation DS100954 www.national.com
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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.
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
(Over Comm Operating Range) −500 mA
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
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 µA Max V
IN
=
2.7V (Note 3)
5V
IN
=
V
CC
I
IL
Input LOW Current −5 µA Max V
IN
=
0.5V (Note 3)
−5 V
IN
=
0.0V
I
OZH
Output Leakage Current 10 µA 0 − 5.5V V
OUT
=
2.7V; OE
n
=
2.0V
I
OZL
Output Leakage Current −10 µA 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 µA Max All Outputs HIGH
I
CCL
Power Supply Current 160 µA Max All Outputs LOW
I
CCZ
Power Supply Current
160 µA Max
OE
n
=
V
CC
, All Others at V
CC
or Ground
I
CCT
Additional ICC/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
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AC Electrical Characteristics
Symbol Parameter T
A
=
−55˚C to +125˚C Units Fig.
No.
V
CC
=
4.5V–5.5V
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
=
25˚C
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
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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
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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
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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.
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support device or system whose failure to perform
can be reasonably expected to cause the failure of
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www.national.com
20-Lead Ceramic Flatpack
Package Number W20A
54FCT241 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.
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