Page 1
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
,OE2Output Enable Input
(Active Low)
I
0–I7
Inputs
O
0–O7
Outputs
OE1I
0–3O0–3OE2I4–7O4–7
HXZHXZ
LHHLHH
LLLLLL
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-STATE Outputs
© 1999 National Semiconductor Corporation DS100967 www.national.com
Page 2
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 −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
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 µA
54FCT 2.4 I
OH
=
−12 mA
V
OL
Output LOW
Voltage
54FCT 0.2 V Min I
OL
=
300 µA
54FCT 0.55 I
OL
=
48 mA
I
IH
Input HIGH Current 5 µA Max V
IN
=
V
CC
I
IL
Input LOW Current −5 µA Max V
IN
=
0.0V
I
OZ
Maximum TRI-STATE Current HIGH or
LOW
±
10 µA Max V
IN
=
0.0V or V
IN=VCC
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 VIN5.3V, VCC=
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, VCC= 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, fCP= 10 MHz,
V
CC
= 5.5V, VIN5.3V or V
IN
<
0.2V, One Bit Toggling, 50
%
Duty Cycle, OE=GND, LE
=
V
CC
Note 1: Absolutemaximum 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
Page 3
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.
54FCT244
www.national.com3
Page 4
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
Page 5
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
LIFE SUPPORT POLICY
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.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: [email protected]
National Semiconductor
Europe
Fax: +49 (0) 1 80-530 85 86
Email: [email protected]
Deutsch Tel: +49 (0) 1 80-530 85 85
English Tel: +49 (0) 1 80-532 78 32
Français Tel: +49 (0) 1 80-532 93 58
Italiano Tel: +49 (0) 1 80-534 16 80
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
Email: [email protected]
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
www.national.com
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
54FCT244 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.
Loading...