DS2148 Dallas Semiconducotr, DS2148 Datasheet - Page 63

• Manufacturer Part Number: DS2148
• Description: 5V E1/T1/J1 Line Interface
• Manufacturer: Dallas Semiconducotr

12.
AC CHARACTERISTICS—MULTIPLEXED PARALLEL PORT
(BIS1 = 0, BIS0 = 0)
Cycle Time
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* Active
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 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
See Figure 12-1, Figure 12-2, Figure 12-3
PARAMETER
AC CHARACTERISTICS
SYMBOL
PW
PW
PW
t
t
t
t
t
t
t
t
t
t
t
t
ASED
R
RWH
DHW
t
DSW
CYC
RWS
t
DHR
AHL
DDR
ASL
ASD
CH
CS
, t
ASH
EH
EL
F
MIN
200
100
100
10
50
20
10
15
10
20
30
10
20
50
0
0
63 of 75
(-40°C to +85°C; V
TYP
MAX
20
50
80
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DD
= 5.0V ± 5%)
NOTES