Manual

DS2143/DS2143Q
031397 33/40
AC CHARACTERISTICS – PARALLEL PORT (0°C to 70°C; V
DD
= 5V + 10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Cycle Time t
CYC
250 ns
Pulse Width, DS Low or RD High PW
EL
150 ns
Pulse Width, DS High or RD Low PW
EH
100 ns
Input Rise/Fall Times t
R
, t
F
30 ns
R/W Hold Time t
RWH
10 ns
R/W Setup Time Before DS High t
RWS
50 ns
CS Setup Time Before DS, WR or
RD
active
t
CS
20 ns
CS Hold Time t
CH
0 ns
Read Data Hold Time t
DHR
10 50 ns
Write Data Hold Time t
DHW
0 ns
Muxed Address Valid to AS or
ALE fall
t
ASL
20 ns
Muxed Address Hold Time t
AHL
10 ns
Delay Time DS, WR or RD to AS
or ALE Rise
t
ASD
25 ns
Pulse Width AS or ALE High PW
ASH
40 ns
Delay Time, AS or ALE to DS,
WR
or RD
t
ASED
20 ns
Output Data Delay Time from DS
or RD
t
DDR
20 100 ns
Data Setup Time t
DSW
80 ns