Rainbow Electronics DS2172 - Manual (Page 15)

DS2172
031197 15/20
AC CHARACTERISTICS – PARALLEL PORT (0 ° C to 70 ° C; V
DD
=5V ± 10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Cycle Time t
CYC
200 ns
Pulse Width, DS Low or RD High PW
EL
100 ns
Pulse Width, DS High or RD Low PW
EH
100 ns
Input Rise/Fall Times t
R
, t
F
20 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
5 50 ns
Write Data Hold Time t
DHW
0 ns
Mux’ed Address Valid to AS or
ALE Fall t
ASL
15 ns
Mux’ed Address Hold Time t
AHL
10 ns
Delay Time DS, WR or RD to AS
or ALE Rise t
ASD
20 ns
Pulse Width AS or ALE High PW
ASH
30 ns
Delay Time, AS or ALE to DS,
WR or RD t
ASED
10 ns
Output Data Delay Time from DS
or RD t
DDR
5 50 ns
Data Setup Time t
DSW
50 ns