Timing Chart - Tandy WP-2 Service Manual

AC
Read
Characteristics
Symbol Parameter Min. Max.
Unit
tACC
Address Access
Time
tCE /CE1
Access
Time
tOE
/OE
Access
Time
tDF]
/CE1
to
Output
in
High-Z
tDF2
/OE
to
Output
in
High-Z
lOH
Output Data Hold
Time
-
250
ns
—
250
ns
-
100
ns
o
90
ns
90
ns
-
lis
AC
Test
Condition
Output
Load
Input Pulse Rise
and
Fall
Times
Input
Pulse Levels
Timing Measurement
Reference Level
1
TTL
and lOOpF
10ns
Max.
0.45V
to
2.4V
Input
0.8V/2.2V
Output 0.8V/2.2V
Capacitance
Symbol Parameter Min.
Typ.
Max.
Unit
crN
COUT
Input Capacitance
Output Capacitance
(VIN=0V)
(VOUT =
0V)
__
5
10
10
20
P
F
P
F
This
parameter
is
periodically
sampled and
not
100%
tested.
AO
—
A16
\
CE
OE
:<
tOH
MMJ
tee
M^mc
tOE
tACC
DO--D7
HIGH-Z
DATA OUTPUT
MMMl
TDF£
)^
HIGH-Z
Figure 4-19. Timing Chart
4-27