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54ABT244 Datasheet

Octal Buffer/Line Driver with TRI-STATE Outputs

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July 1998
54ABT244
Octal Buffer/Line Driver with TRI-STATE® Outputs
General Description
The ’ABT244 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
24 mA
n Output switching specified for both 50 pF and 250 pF
loads
n Guaranteed simultaneous switching, noise level and
dynamic threshold performance
n Guaranteed latchup protection
n High impedance glitch free bus loading during entire
power up and power down cycle
n Nondestructive hot insertion capability
n Disable time less than enable time to avoid bus
contention
n Standard Microcircuit Drawing (SMD) 5962-9214701
Ordering Code
Military
54ABT244J-QML
54ABT244W-QML
54ABT244E-QML
Package
Number
J20A
W20A
E20A
Connection Diagrams
Package Description
20-Lead Ceramic Dual-In-Line
20-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier, Type C
Pin Assignment for
DIP and Flatpak
Pin Assignment for LCC
DS100203-1
Pin
Names
OE1, OE2
I0– I7
O0– O7
Description
Output Enable Input
(Active Low)
Inputs
Outputs
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100203
DS100203-2
Truth Table
OE1
H
I0–3 O0–3
XZ
L HH
L LL
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
OE2
H
L
L
I4–7 O4–7
XZ
HH
LL
www.national.com


National Semiconductor Electronic Components Datasheet

54ABT244 Datasheet

Octal Buffer/Line Driver with TRI-STATE Outputs

No Preview Available !

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
Ambient Temperature under Bias
Junction Temperature under Bias
Ceramic
VCC Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Any Output
in the Disabled or
Power-Off State
in the HIGH State
−65˚C to +150˚C
−55˚C to +125˚C
−55˚C to +175˚C
−0.5V to +7.0V
−0.5V to +7.0V
−30 mA to +5.0 mA
−0.5V to 5.5V
−0.5V to VCC
Current Applied to Output
in LOW State (Max)
DC Latchup Source Current
Over Voltage Latchup (I/O)
twice the rated IOL (mA)
−500 mA
10V
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
Supply Voltage
Military
Minimum Input Edge Rate
Data Input
Enable Input
−55˚C to +125˚C
+4.5V to +5.5V
(V/t)
50 mV/ns
20 mV/ns
DC Electrical Characteristics
Symbol
VIH
VIL
VCD
VOH
VOL
IIH
IBVI
IIL
VID
Parameter
ABT244
Min Typ Max
Input HIGH Voltage
2.0
Input LOW Voltage
0.8
Input Clamp Diode Voltage
−1.2
Output HIGH Voltage
54ABT 2.5
54ABT 2.0
Output LOW Voltage
54ABT
0.55
Input HIGH Current
5
5
Input HIGH Current Breakdown Test
7
Input LOW Current
−5
−5
Input Leakage Test
4.75
Units
V
V
V
V
V
V
µA
µA
µA
V
IOZH
IOZL
IOS
ICEX
IZZ
ICCH
ICCL
ICCZ
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Output High Leakage Current
Bus Drainage Test
Power Supply Current
Power Supply Current
Power Supply Current
−100
50
−50
−275
50
100
50
30
50
µA
µA
mA
µA
µA
µA
mA
µA
ICCT
Additional ICC/Input Outputs Enabled
Outputs TRI-STATE
Outputs TRI-STATE
2.5 mA
2.5 mA
50 µA
ICCD
Dynamic ICC
(Note 4)
No Load
mA/
0.1 MHz
VCC
Min
Min
Min
Min
Max
Max
Max
0.0
0 − 5.5V
0 − 5.5V
Max
Max
0.0
Max
Max
Max
Max
Max
Conditions
Recognized HIGH Signal
Recognized LOW Signal
IIN = −18 mA
IOH = −3 mA
IOH = −24 mA
IOL = 48 mA
VIN = 2.7V (Note 4)
VIN = VCC
VIN = 7.0V
VIN = 0.5V (Note 4)
VIN = 0.0V
IID = 1.9 µA
All Other Pins Grounded
VOUT = 2.7V; OEn = 2.0V
VOUT = 0.5V; OEn = 2.0V
VOUT = 0.0V
VOUT = VCC
VOUT = 5.5V; All Others GND
All Outputs HIGH
All Outputs LOW
OEn = VCC;
All Others at VCC or Ground
VI = VCC − 2.1V
Enable Input VI = VCC − 2.1V
Data Input VI = VCC − 2.1V
All Others at VCC or Ground
Outputs Open
OEn = GND, (Note 3)
One Bit Toggling, 50% Duty Cycle
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: For 8 bits toggling, ICCD < 0.8 mA/MHz.
Note 4: Guaranteed, but not tested.
www.national.com
2


Part Number 54ABT244
Description Octal Buffer/Line Driver with TRI-STATE Outputs
Maker National Semiconductor
Total Page 10 Pages
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