Datasheet

DS21Q59 Quad E1 Transceiver
66 of 76
26.2 Nonmultiplexed Bus AC Characteristics
Table 26-B. AC Characteristics—Nonmultiplexed Parallel Port
(V
DD
= 3.3V ±5%, T
A
= 0°C to +70°C for DS21Q59L; V
DD
= 3.3V ±5%, T
A
= -40°C to +85°C for DS21Q59LN.)
(Figure 26-4
through Figure 26-7)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
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 140 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 5.0 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 26-4. Intel Bus Read Timing (PBTS = 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