54FCT240
Octal Buffer/Line Driver with TRI-STATE
Outputs
General Description
The 54FCT240 is an octal buffer and line driver designed to
be employed as a memory address driver, clock driver and
bus oriented transmitter or receiver which provides improved
PC board density.
Features
n
Inverting TRI-STATE outputs drive bus lines or buffer
memory address registers
n
Output sink capability of 32 mA, source capability of 12
mA
n
TTL input and output compatible levels
n
CMOS power consumption
n
Standard Microcircuit Drawing (SMD) 5962-8765501
Ordering Code:
Military
Package
Package Description
Number
54FCT240DMQB
J20A
20-Lead Ceramic Dual-In-Line
54FCT240FMQB
W20A
20-Lead Cerpak
54FCT240LMQB
E20A
20-Lead Ceramic Leadless Chip Carrier, Type C
Logic Symbol
Pin Names
Description
OE
1
, OE
2
TRI-STATE Output Enable Inputs
I
0
I
7
Inputs
O
0
O
7
Outputs
Connection Diagrams
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
FACT
is a registered trademark of Fairchild Semiconductor Corporation.
IEEE/IEC
DS100955-1
Pin Assignment
for DIP and Flatpak
DS100955-2
Pin Assignment
for LCC
DS100955-3
August 1998
54FCT240
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
1999 National Semiconductor Corporation
DS100955
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 1)
-0.5V to +7.0V
Input Current (Note 1)
-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)
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
-55C to +125C
Supply Voltage
Military
+4.5V to +5.5V
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
FCT240
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
0.5
V
Min
I
OL
= 32 mA
I
IH
Input HIGH Current
5
A
Max
V
IN
= 5.5V
I
IL
Input LOW Current
-5
A
Max
V
IN
= 0.0V
I
OZH
High Impedance Output Current
10
A
Max
V
IN
= 5.5V
I
OZL
High Impedance Output Current
-10
A
Max
V
IN
= 0.0V
I
OS
Output Short-Circuit Current
-60
mA
Max
V
OUT
= 0.0V
I
CCQ
Power Supply Current
1.5
mA
Max
V
IN
= 0.2V or V
IN
= 5.3V
I
CC
Power Supply Current
2.0
mA
Max
V
IN
= 3.4V
I
CCT
Total Power Supply Current
4.8
mA
Max
V
IN
= 3.4V or V
IN
= GND, OE =
GND, f
I
= 10Mhz, outputs open,
one bit toggling - 50% duty cycle
4.0
mA
Max
V
IN
= 5.3V or V
IN
= 0.2V,OE =
GND, f
I
= 10Mhz, outputs open,
one bit toggling - 50% duty cycle
I
CCD
Dynamic I
CC
No Load
0.25
mA/MHz
Max
Outputs Open, OE = GND, One
Bit Toggling, 50% Duty Cycle
54FCT240
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
54FCT240
www.national.com
5
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