54FCT244.pdf
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110 KB
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Pobierz
September 1998
54FCT244
Octal Buffer/Line Driver with TRI-STATE
®
Outputs
General Description
The ’FCT244 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.
Features
n
Non-inverting buffers
n
Output sink capability of 48 mA, source capability of
12 mA
n
TRI-STATE outputs drive lines or buffer memory address
registers
n
TTL input and output level compatible
n
CMOS power consumption
n
Standard Microcircuit Drawing (SMD) 5962-8763001
Ordering Code
Military
Package
Package Description
Number
54FCT244DMQB
J20A
20-Lead Ceramic Dual-In-Line
54FCT244FMQB
W20A
20-Lead Cerpack
54FCT244LMQB
E20A
20-Lead Ceramic Leadless Chip Carrier, Type C
Connection Diagrams
Pin Assignment for
DIP and Flatpak
Pin Assignment for LCC
DS100967-2
DS100967-1
= HIGH Voltage Level
L = LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
Pin
Names
Description
OE
1
,OE
2
Output Enable Input
(Active Low)
I
0
–I
7
Inputs
O
0
–O
7
Outputs
OE
1
I
0–3
O
0–3
OE
2
I
4–7
O
4–7
HXZ
HXZ
L
HHL
HH
L
L
L
L
L
L
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation
DS100967
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
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
−65˚C to +150˚C
Ambient Temperature under Bias
−55˚C to +125˚C
Junction Temperature under Bias
Ceramic
−55˚C to +175˚C
−55˚C to +125˚C
V
CC
Pin Potential to Ground Pin
−0.5V to +7.0V
Supply Voltage
Military
Input Voltage (Note 2)
−0.5V to +7.0V
+4.5V to +5.5V
Input Current (Note 2)
−30 mA to +5.0 mA
Minimum Input Edge Rate
(
D
V/
D
t)
Voltage Applied to Any Output
in the Disabled or
Power-Off State
Data Input
50 mV/ns
Enable Input
20 mV/ns
−0.5V to 5.5V
in the HIGH State
−0.5V to V
CC
DC Electrical Characteristics for ’FCT Family Devices
Symbol
Parameter
FCT244
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
I
IN
=
−18 mA
V
CD
Input Clamp Diode Voltage
−1.2
V
Min
I
OH
=
−300 µA
V
OH
Output HIGH
Voltage
54FCT
4.3
V
Min
I
OH
=
−12 mA
54FCT
2.4
I
OL
=
300 µA
V
OL
Output LOW
Voltage
54FCT
0.2
V
Min
I
OL
=
48 mA
54FCT
0.55
V
IN
=
V
CC
I
IH
Input HIGH Current
5
µA
Max
V
IN
=
0.0V
I
IL
Input LOW Current
−5
µA
Max
±
10
V
IN
=
0.0V or V
IN
=V
CC
I
OZ
Maximum TRI-STATE Current HIGH or
LOW
µA
Max
V
OUT
=
0.0V
I
OS
Output Short-Circuit Current
-60
mA
Max
V
IN
<
0.2V or V
IN
5.3V, V
CC
=
5.5V
I
CCQ
Quiescent Power Supply Current
1.5
mA
Max
D
I
CC
Quiescent Power
Supply Current
2.0
mA
Max
V
I
= 3.4V, V
CC
= 5.5V
I
CCD
Dynamic I
CC
0.4
mA/
MHz
Max
Outputs Open, V
CC
= 5.5V, V
IN
5.3V or V
IN
<
0.2V, One Bi
t
Toggling, 50% Duty Cycle, OE
=
GND, LE = V
CC
I
CCT
6.0 mA Max Outputs Open, f
CP
= 10 MHz,
V
CC
= 5.5V, V
IN
5.3V or V
IN
<
0.2V, One B
it T
oggling, 50%
Duty Cycle, OE = GND, LE =
V
CC
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.
Note 3:
All outputs loaded; thresholds on input associated with output under test.
Note 4:
Maximum test duration 2.0 ms, one output loaded at a time.
Total Power Supply
Current
www.national.com
2
AC Electrical Characteristics for ’FCT Family Devices
Symbol
Parameter
54FCT
Units
Fig.
No.
T
A
=
−55˚C to +125˚C
V
CC
=
4.5V–5.5V
C
L
=
50 pF
Min
Max
t
PLH
Propagation Delay
1.5
7.5
ns
t
PHL
Data to Outputs
1.5
7.5
t
PZH
Output Enable
1.5
10.5
ns
t
PZL
Time
1.5
10.5
t
PHZ
Output Disable
1.5
8.0
ns
t
PLZ
Time
1.5
8.0
Capacitance
Symbol
Parameter
Max
Units
Conditions
T
A
= 25˚C
C
IN
Input Capacitance
10.0
pF
V
CC
= 0V
C
OUT
(Note 5)
Output Capacitance
12.0
pF
V
CC
= 5.0V
Note 5:
C
OUT
is measured at frequency f = 1 MHz, per MIL-STD-883B, Method 3012.
3
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Physical Dimensions
inches (millimeters) unless otherwise noted
20-Terminal Ceramic Chip Carrier (L)
NS Package Number E20A
20-Lead Ceramic Dual-In-Line (D)
NS Package Number J20A
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4
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
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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Americas
Tel: 1-800-272-9959
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