AC Operating Requirements
54ABT
Symbol
Parameter
T
A
= −55˚C to +125˚C
V
CC
= 4.5V–5.5V
C
L
= 50 pF
Min
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
W
(L)
Setup Time, HIGH or LOW
A
n
or B
n
to LEBA or LEAB
Hold Time, HIGH or LOW
A
n
or B
n
to LEBA or LEAB
Setup Time, HIGH or LOW
A
n
or B
n
to CEAB or CEBA
Hold Time, HIGH or LOW
A
n
or B
n
to CEAB or CEBA
Pulse Width, LOW
3.5
3.0
2.0
2.0
3.3
2.5
2.0
2.0
3.5
ns
ns
ns
ns
Max
ns
Fig.
Units
No.
Figure
7
Figure
7
Figure
7
Figure
7
Figure
5
Capacitance
Symbol
C
IN
C
I/O
(Note 6)
Parameter
Input Capacitance
Output Capacitance
Typ
5.0
11.0
Units
pF
pF
V
CC
V
CC
Conditions: T
A
= 25˚C
= 0V (non I/O pins)
= 5.0V (A
n
, B
n
)
Note 6:
C
I/O
is measured at frequency, f = 1 MHz, PER MIL-STD-883, METHOD 3012.
AC Loading
DS100218-4
DS100218-6
*Includes jig and probe capacitance
FIGURE 1. Standard AC Test Load
FIGURE 2. V
M
= 1.5V
Input Pulse Requirements
Ampli-
tude
3V
Rep.
Rate
1 MHz
t
w
500 ns
t
r
2.5 ns
t
f
2.5 ns
FIGURE 3. Test Input Signal Requirements
5
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