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Электронный компонент: 54ABT16245

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54ABT16245
16-Bit Transceiver with TRI-STATE
Outputs
General Description
The 'ABT16245 contains sixteen non-inverting bidirectional
buffers with TRI-STATE outputs and is intended for bus
oriented applications. The device is byte controlled. Each
byte has separate control inputs which can be shorted to-
gether for full 16-bit operation. The T/R inputs determine the
direction of data flow through the device. The OE inputs
disable both the A and B ports by placing them in a high
impedance state.
Features
n
Bidirectional non-inverting buffers
n
Separate control logic for each byte
n
16-bit version of the 'ABT245
n
A and B output sink capability of 48 mA, source
capability of 24 mA
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) 5962-9317501
Military
Package
Number
Package Description
54ABT16245W-QML
WA48A
48-Lead Cerpack
Logic Symbol
Pin Description
Pin Names
Description
OE
n
Output Enable Input (Active Low)
T/R
n
Transmit/Receive Input
A
0
A
15
Side A Inputs/Outputs
B
0
B
15
Side B Inputs/Outputs
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
DS100200-1
August 1998
54ABT16245
16-Bit
T
ransceiver
with
TRI-ST
A
T
E
Outputs
2004 National Semiconductor Corporation
DS100200
www.national.com
Connection Diagram
Functional Description
The 'ABT16245 contains sixteen non-inverting bidirectional
buffers with TRI-STATE outputs. The device is byte con-
trolled with each byte functioning identically, but independent
of the other. The control pins can be shorted together to
obtain full 16-bit operation.
Inputs
Outputs
OE
1
T/R
1
L
L
Bus B
0
B
7
Data to Bus A
0
A
7
L
H
Bus A
0
A
7
Data to Bus B
0
B
7
H
X
HIGH-Z State on A
0
A
7
, B
0
B
7
Inputs
Outputs
OE
2
T/R
2
L
L
Bus B
8
B
15
Data to Bus A
8
A
15
L
H
Bus A
8
A
15
Data to Bus B
8
B
15
H
X
HIGH-Z State on A
8
A
15
, B
8
B
15
H = High Voltage Level
L = Low Voltage Level
X = Immaterial
Z = High Impedance
Logic Diagrams
Pin Assignment for Cerpack
DS100200-2
DS100200-3
DS100200-4
54ABT16245
www.national.com
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
-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
ABT16245
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 (OE
n
, T/R
n
)
V
OH
Output HIGH Voltage
54ABT
2.5
V
Min
I
OH
= -3 mA (A
n
, B
n
)
54ABT
2.0
V
Min
I
OH
= -24 mA (A
n
, B
n
)
V
OL
Output LOW Voltage
54ABT
0.55
V
Min
I
OL
= 48 mA (A
n
, B
n
)
I
IH
Input HIGH Current
5
A
Max
V
IN
= 2.7V (OE
n
, T/R
n
) (Note 3)
5
V
IN
= V
CC
(OE
n
, T/R
n
)
I
BVI
Input HIGH Current
7
A
Max
V
IN
= 7.0V (OE
n
, T/R
n
)
Breakdown Test
I
BVIT
Input HIGH Current
100
A
Max
V
IN
= 5.5V (A
n
, B
n
)
Breakdown Test (I/O)
I
IL
Input LOW Current
-5
A
Max
V
IN
= 0.5V (OE
n
, T/R
n
) (Note 3)
-5
V
IN
= 0.0V (OE
n
, T/R
n
)
V
ID
Input Leakage Test
4.75
V
0.0
I
ID
= 1.9 A (OE
n
, T/R
n
)
All Other Pins Grounded
I
IH
+ I
OZH
Output Leakage Current
50
A
0 -
5.5V
V
OUT
= 2.7V (A
n
, B
n
); OE = 2.0V
I
IL
+ I
OZL
Output Leakage Current
-50
A
0 -
5.5V
V
OUT
= 0.5V (A
n
, B
n
); OE = 2.0V
I
OS
Output Short-Circuit Current
-100
-275
mA
Max
V
OUT
= 0.0V (A
n
, B
n
)
I
CEX
Output High Leakage Current
50
A
Max
V
OUT
= V
CC
(A
n
, B
n
)
I
ZZ
Bus Drainage Test
100
A
0.0
V
OUT
= 5.50V (A
n
, B
n
);
All Others GND
I
CCH
Power Supply Current
100
A
Max
All Outputs HIGH
I
CCL
Power Supply Current
60
mA
Max
All Outputs LOW
I
CCZ
Power Supply Current
100
A
Max
OE
n
= V
CC
, T/R
n
= GND or 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
OE
n
, T/ R
n
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
54ABT16245
www.national.com
3
DC Electrical Characteristics
(Continued)
Symbol
Parameter
ABT16245
Units
V
CC
Conditions
Min Typ Max
I
CCD
Dynamic I
CC
No Load
mA/
Max
Outputs Open
0.1
MHz
OE
n
= GND, T/R
n
= GND or V
CC
One Bit Toggling, 50% Duty Cycle
Note 3: Guaranteed, but not tested.
AC Electrical Characteristics
Symbol
Parameter
54ABT
Units
Fig.
No.
T
A
=
-55C to +125C
V
CC
= 4.5V5.5V
C
L
= 50 pF
Min
Max
t
PLH
Propagation
0.5
4.5
t
PHL
Delay Data
0.5
5.2
ns
Figure 5
to Outputs
t
PZH
Output Enable
0.8
6.4
ns
Figure 4
t
PZL
Time
0.9
6.9
t
PHZ
Output Disable
1.3
6.9
ns
Figure 4
t
PLZ
Time
1.0
6.9
Capacitance
Symbol
Parameter
Typ
Units
Conditions, T
A
= 25C
C
IN
Input Capacitance
5
pF
V
CC
= 0.0V (OE
n
, T/R
n
)
C
I/O
(Note 4)
Output Capacitance
11
pF
V
CC
= 5.0V (A
n
, B
n
)
Note 4: C
I/O
is measured at frequency f = 1 MHz, per MIL-STD-883B, Method 3012.
t
PLH
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100200-13
t
PHL
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100200-14
54ABT16245
www.national.com
4
Capacitance
(Continued)
t
PLH
vs Load Capacitance
1 Output Switching, T
A
= 25C
DS100200-15
t
PHL
vs Load Capacitance
1 Output Switching, T
A
= 25C
DS100200-16
t
PLH
vs Load Capacitance
16 Outputs Switching, T
A
= 25C
DS100200-17
t
PHL
vs Load Capacitance
16 Outputs Switching, T
A
= 25C
DS100200-18
t
PZL
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100200-19
t
PLZ
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100200-20
t
PZH
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100200-21
t
PHZ
vs Temperature (T
A
)
C
L
= 50 pF, 1 Output Switching
DS100200-22
Dashed lines represent design characteristics; for specified guarantees, refer to AC Characteristics Table.
54ABT16245
www.national.com
5