Rainbow Electronics DS2154 - Manual (Page 67)

DS2154
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AC CHARACTERISTICS – NON–MULTIPLEXED PARALLEL
PORT (MUX=0 )
(0
°
C to 70
°
C; V
DD
=5V
±
5% for DS2154T;
–40
°
C to + 85
°
C; V
DD
=5V
±
5% for DS2154TN)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Set Up Time for A0 to A7 Valid to
CS Active t1 0 ns
Set Up Time for CS Active to
either RD, WR, or DS Active t2 0 ns
Delay Time from either RD or DS
Active to Data Valid t3 75 ns
Hold Time from either RD, WR, or
DS Inactive to CS Inactive t4 0 ns
Hold Time from CS Inactive to
Data Bus 3–state t5 5 20 ns
Wait Time from either WR or DS
Active to Latch Data t6 75 ns
Data Set Up Time to either WR or
DS Inactive t7 10 ns
Data Hold Time from either WR or
DS Inactive t8 10 ns
Address Hold from either
WR or DS inactive t
9
10 ns
See Figures 14–10 to 14–13 for details.
INTEL BUS READ AC TIMING (BTS=0/MUX=0) Figure 14–10
A0 TO A7
D0 TO D7
WR
CS
RD
ADDRESS VALID
DATA VALID
0 ns min.
0 ns min.
75 ns max.
0 ns min.
t 1
t 5
t 2 t 3 t 4
5 ns min. / 20 ns max.