54abt245 National Semiconductor Corporation, 54abt245 Datasheet - Page 4

• Manufacturer Part Number: 54abt245
• Description: Octal Bidirectional Transceiver With Tri-state Outputs
• Manufacturer: National Semiconductor Corporation

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I
CCD
C
C
Symbol
Symbol
V
V
DC Electrical Characteristics
Note 3: Guaranteed but not tested.
Note 4: For 8 bits toggling, I
DC Electrical Characteristics
Note 5: Max number of outputs defined as (n). n − 1 data inputs are driven 0V to 3V. One output at LOW.
AC Electrical Characteristics
Capacitance
Note 6: C
IN
I/O
OLP
OLV
(Note 6)
t
t
t
t
t
t
Symbol
PLH
PHL
PZH
PZL
PHZ
PLZ
Symbol
I/O
is measured at frequency f = 1 MHz, per MIL-STD-883B, Method 3012.
Dynamic I
(Note 3)
Quiet Output Maximum Dynamic V
Quiet Output Minimum Dynamic V
CC
CCD
Parameter
<
Propagation Delay
Data to Outputs
Output Enable
Time
Output Disable
Time
Input Capacitance
I/O Capacitance
No Load
0.8 mA/MHz.
Parameter
Parameter
Parameter
OL
OL
(Continued)
Min Typ
ABT245
4
Max
11.0
Typ
0.1
Min
5.0
Min
1.0
1.0
1.0
2.0
1.7
1.7
T
A
V
Units
MHz
mA/
= −55˚C to +125˚C
CC
-0.45
C
Max
1.1
L
= 4.5V–5.5V
54ABT
= 50 pF
Units
V
Max
pF
pF
Units
CC
V
V
Max
4.8
4.8
6.7
7.5
7.4
6.5
Outputs Open
OE = GND, T/R = GND or V
One Bit Toggling, 50% Duty Cycle
(Note 4)
V
5.0
5.0
V
V
CC
CC
CC
= 0V (OE , T/R)
= 5.0V (A
Conditions
T
T
Conditions
T
A
A
A
= 25˚C (Note 5)
= 25˚C(Note 5)
C
= 25˚C
Conditions
R
n
L
L
, B
= 50 pF,
= 500
Units
n
)
ns
ns
ns
CC