DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
20. AC TIMING PARAMETERS AND DIAGRAMS
20.1. Multiplexed Bus AC Characteristics
AC CHARACTERISTICS—MULTIPLEXED PARALLEL PORT (MUX = 1)
(VDD = 3.3V M5%, TA = 0°C to +70°C; for DS21354L; VDD = 5.0V M5%, TA = 0°C to +70°C for DS21554L;
VDD = 3.3V M5%, TA = -40°C to +85°C for DS21354LN; VDD = 5.0V M5%, TA = -40LC to +85LC for DS21554LN.)
(See Figure 20-1 to Figure 20-3.)
PARAMETER
SYMBOL MIN TYP MAX UNITS NOTES
tCYC
PWEL
PWEH
tR, tF
tRWH
200
100
100
ns
ns
ns
ns
ns
ns
Cycle Time
Pulse Width, DS Low or RD High
Pulse Width, DS High or RD Low
Input Rise/Fall Yimes
20
50
10
50
R/W Hold Time
tRWS
R/W Setup Time before DS High
CS Setup Time before DS, WR, or RD
tCS
20
ns
Active
tCH
tDHR
tDHW
tASL
tAHL
0
10
0
15
10
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
Delay time DS, WR, or RD to AS or ALE
tASD
20
ns
Rise
PWASH
tASED
tDDR
30
10
20
50
ns
ns
ns
ns
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
80
tDSW
112 of 124
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
