DS21348

Manufacturer Part NumberDS21348
Description3.3V E1/T1/J1 Line Interface
ManufacturerDallas Semiconducotr
DS21348 datasheet
 


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Page 61/73

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12.
AC CHARACTERISTICS
AC CHARACTERISTICS—MULTIPLEXED PARALLEL PORT
(BIS1 = 0, BIS0 = 0)
PARAMETER
SYMBOL
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
PW
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
MIN
TYP
t
200
CYC
PW
100
EL
PW
100
EH
t
, t
R
F
t
10
RWH
t
50
RWS
t
20
CS
t
0
CH
t
10
DHR
t
0
DHW
t
15
ASL
t
10
AHL
t
20
ASD
30
ASH
t
10
ASED
t
20
DDR
t
50
DSW
61 of 73
= 3.3V ± 5%;
(-40°C to +85°C; V
DD
= 5.0V ± 5%)
-40°C to +85°C; V
DD
MAX
UNITS
ns
ns
ns
20
ns
ns
ns
ns
ns
50
ns
ns
ns
ns
ns
ns
ns
80
ns
ns
NOTES