DS2154
16 AC CHARACTERISTICS
Table 16-1. AC Characteristics—Multiplexed Parallel Port (MUX = 1)
(VDD = 5V ±5%, TA = 0°C to +70°C for DS2154L, TA = -40°C to +85°C for DS2154LN.)
(See Figure 16-1, Figure 16-2, and Figure 16-3.)
PARAMETER
SYMBOL MIN TYP MAX UNITS NOTES
Cycle Time
tCYC
PWEL
PWEH
tR, tF
tRWH
tRWS
200
100
100
ns
ns
ns
ns
ns
Pulse Width, DS Low or RD High
Pulse Width, DS High or RD Low
Input Rise/Fall Times
R/ W Hold Time
R/ W Setup Time Before DS High
CS Setup Time Before DS, WR or RD
20
50
10
50
ns
tCS
20
ns
active
tCH
tDHR
tDHW
tASL
tAHL
0
10
0
ns
ns
ns
ns
ns
CS Hold Time
Read Data Hold Time
Write Data Hold Time
Muxed Address Valid to AS or ALE Fall
Muxed Address Hold Time
15
10
Delay Time, DS, WR or RD to AS or ALE
tASD
20
ns
Rise
Pulse Width AS or ALE High
Delay Time, AS or ALE to DS, WR or RD
Output Data Delay Time from DS or RD
Data Setup Time
PWASH
tASED
tDDR
30
10
20
50
ns
ns
ns
ns
80
tDSW
Figure 16-1. Intel Bus Read AC Timing (BTS = 0/MUX = 1)
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ROCHESTER [ Rochester Electronics ]
