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Электронный компонент: 54ABT16244C

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54ABT16244
16-Bit Buffer/Line Driver with TRI-STATE
Outputs
General Description
The 'ABT16244 contains sixteen non-inverting buffers with
TRI-STATE outputs designed to be employed as a memory
and address driver, clock driver, or bus oriented transmitter/
receiver.
The
device
is
nibble
controlled.
Individual
TRI-STATE control inputs can be shorted together for 8-bit or
16-bit operation.
Features
n
Separate control logic for each nibble
n
16-bit version of the 'ABT244
n
Outputs sink capability of 48 mA, source capability of
24 mA
n
Guaranteed output skew
n
Guaranteed multiple output switching specifications
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
Non-destructive hot insertion capability
n
Standard Microcircuit Drawing (SMD) 5962-9317402
Ordering Code:
Military
Package
Package Description
Number
54ABT16244W-QML
WA48A
48-Lead Cerpack
Logic Symbol
Pin Description
Pin Names
Description
OE
n
Output Enable Inputs (Active Low)
I
0
I
15
Inputs
O
0
O
15
Outputs
Connection Diagram
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
DS100223-1
Pin Assignment for Cerpack
DS100223-2
July 1998
54ABT16244
16-Bit
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
1998 National Semiconductor Corporation
DS100223
www.national.com
Functional Description
The 'ABT16244 contains sixteen non-inverting buffers with TRI-STATE outputs. The device is nibble (4 bits) controlled with each
nibble functioning identically, but independent of the other. The control pins can be shorted together to obtain full 16-bit operation.
Truth Tables
Inputs
Outputs
OE
1
I
0
I
3
O
0
O
3
L
L
L
L
H
H
H
X
Z
Inputs
Outputs
OE
3
I
8
I
11
O
8
O
11
L
L
L
L
H
H
H
X
Z
H = High Voltage Level
L = Low Voltage Level
X = Immaterial
Z = High Impedance
Inputs
Outputs
OE
2
I
4
I
7
O
4
O
7
L
L
L
L
H
H
H
X
Z
Inputs
Outputs
OE
4
I
12
I
15
O
12
O
15
L
L
L
L
H
H
H
X
Z
Logic Diagram
DS100223-3
www.national.com
2
Absolute Maximum Ratings
(Note 1)
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
Over Voltage Latchup (I/O)
10V
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
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.
DC Electrical Characteristics
Symbol
Parameter
ABT16244
Units
V
CC
Conditions
Min Typ
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
54ABT
2.5
V
Min
I
OH
= -3 mA
54ABT
2.0
V
Min
I
OH
= -24 mA
V
OL
Output LOW Voltage
54ABT
0.55
V
Min
I
OL
= 48 mA
I
IH
Input HIGH Current
5
A
Max
V
IN
= 2.7V (Note 3)
5
V
IN
= V
CC
I
BVI
Input HIGH Current
7
A
Max
V
IN
= 7.0V
Breakdown Test
I
IL
Input LOW Current
-5
A
Max
V
IN
= 0.5V (Note 3)
-5
V
IN
= 0.0V
V
ID
Input Leakage Test
4.75
V
0.0
I
ID
= 1.9 A
All Other Pins Grounded
I
OZH
Output Leakage Current
50
A
0 - 5.5V
V
OUT
= 2.7V; OE
n
= 2.0V
I
OZL
Output Leakage Current
-50
A
0 - 5.5V
V
OUT
= 0.5V; OE
n
= 2.0V
I
OS
Output Short-Circuit Current
-100
-275
mA
Max
V
OUT
= 0.0V
I
CEX
Output High Leakage Current
50
A
Max
V
OUT
= V
CC
I
ZZ
Bus Drainage Test
100
A
0.0
V
OUT
= 5.5V
All Other Pins GND
I
CCH
Power Supply Current
2.0
mA
Max
All Outputs HIGH
I
CCL
Power Supply Current
60
mA
Max
All Outputs LOW
I
CCZ
Power Supply Current
2.0
mA
Max
OE
n
= V
CC
All Others at V
CC
or GND
I
CCT
Additional I
CC
/Input
Outputs Enabled
2.5
mA
V
I
= V
CC
- 2.1V
Outputs TRI-STATE
2.5
mA
Max
Enable Input V
I
= V
CC
- 2.1V
Outputs TRI-STATE
50
A
Data Input V
I
= V
CC
- 2.1V
All Others at V
CC
or GND
I
CCD
Dynamic I
CC
No Load
mA/
Outputs Open, OE
n
= GND
(Note 3)
0.1
MHz
Max
One Bit Toggling,
50% Duty Cycle
Note 3: Guaranteed but not tested.
3
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DC Electrical Characteristics
Conditions
Symbol
Parameter
Min
Max
Units
V
CC
C
L
= 50 pF,
R
L
= 500
V
OLP
Quiet Output Maximum Dynamic V
OL
1.1
V
5.0
T
A
= 25C (Note 4)
V
OLV
Quiet Output Minimum Dynamic V
OL
-0.45
V
5.0
T
A
= 25C(Note 4)
Note 4: Max number of outputs defined as (n). n - 1 data inputs are driven 0V to 3V. One output at LOW.
AC Electrical Characteristics
Symbol
Parameter
54ABT
Units
T
A
= -55C to +125C
V
CC
= 4.5V5.5V
C
L
= 50 pF
Min
Max
t
PLH
Propagation
0.5
5.3
ns
t
PHL
Delay Data
0.5
5.9
to Outputs
t
PZH
Output Enable
1.5
6.8
ns
t
PZL
Time
1.5
7.0
t
PHZ
Output Disable
1.5
7.7
ns
t
PLZ
Time
1.5
6.5
Capacitance
Symbol
Parameter
Typ
Units
Conditions
T
A
= 25C
C
IN
Input Capacitance
5.0
pF
V
CC
= 5.0V
C
OUT
(Note 5)
Output Capacitance
9.0
pF
V
CC
= 5.0V
Note 5: C
OUT
is measured at frequency f = 1 MHz; per MIL STD-883B, Method 3012.
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4
Capacitance
(Continued)
t
PLH
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100223-12
t
PHL
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100223-13
t
PLH
vs Load Capacitance
1 Output Switching, T
A
= 25C
DS100223-14
t
PHL
vs Load Capacitance
1 Output Switching, T
A
= 25C
DS100223-15
t
PLH
vs Load Capacitance
16 Outputs Switching, T
A
= 25C
DS100223-16
t
PHL
vs Load Capacitance
16 Outputs Switching, T
A
= 25C
DS100223-17
t
PZL
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100223-18
t
PLZ
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100223-19
Dashed lines represent design characteristics; for specified guarantees, refer to AC Characteristics Tables.
5
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