Datasheet

DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
115 of 124
20.2. Nonmultiplexed Bus AC Characteristics
AC CHARACTERISTICS—NONMULTIPLEXED PARALLEL PORT (MUX = 0)
(V
DD
= 3.3V ±5%, T
A
= 0°C to +70°C; for DS21354L; V
DD
= 5.0V ±5%, T
A
= 0°C to +70°C for DS21554L;
V
DD
= 3.3V ±5%, T
A
= -40°C to +85°C for DS21354LN; V
DD
= 5.0V ±5%, T
A
= -40°C to +85°C for DS21554LN.)
(See Figure 20-4
to Figure 20-7.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Setup Time for A0 to A7, Valid to
CS Active
t1 0 ns
Setup 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 Tri-State
t5 5 20 ns
Wait Time from Either WR or DS
Active to Latch Data
t6 75 ns
Data Setup 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
t9 10 ns
Figure 20-4. Intel Bus Read AC Timing (BTS = 0/MUX = 0)
ADDRESS VALID
DATA VALID
A0–A7
D0–D7
W
R
C
S
R
D
0ns MIN
0ns MIN
75ns MAX
0ns MIN
5ns MIN/20ns MAX
t1
t2 t3 t4
t5