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Электронный компонент: 54FCT244F

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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
Names
Description
OE
1
, OE
2
Output Enable Input
(Active Low)
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
H
X
Z
L
H
H
L
H
H
L
L
L
L
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 Flatpak
DS100967-1
Pin Assignment for LCC
DS100967-2
September 1998
54FCT244
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
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
-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 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
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
I
OH
= -12 mA
V
OL
Output LOW
Voltage
54FCT
0.2
V
Min
I
OL
= 300 A
54FCT
0.55
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
OZ
Maximum TRI-STATE Current HIGH or
LOW
10
A
Max
V
IN
= 0.0V or V
IN
= V
CC
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
= 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 Bit
Toggling, 50% Duty Cycle, OE =
GND, LE = V
CC
I
CCT
Total Power Supply
Current
6.0
mA
Max
Outputs Open, f
CP
= 10 MHz,
V
CC
= 5.5V, V
IN
5.3V or V
IN
<
0.2V, One Bit Toggling, 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.
54FCT244
www.national.com
2
AC Electrical Characteristics for 'FCT Family Devices
Symbol
Parameter
54FCT
Units
Fig.
No.
T
A
= -55C to +125C
V
CC
= 4.5V5.5V
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
= 25C
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.
54FCT244
www.national.com
3
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
54FCT244
www.national.com
4
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
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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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Corporation
Americas
Tel: 1-800-272-9959
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Email: support@nsc.com
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Japan Ltd.
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Fax: 81-3-5639-7507
www.national.com
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
54FCT244
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.