ds21ft40 Maxim Integrated Products, Inc., ds21ft40 Datasheet - Page 76

• Manufacturer Part Number: ds21ft40
• Description: Ds21ft40 Four X Three 12 Channel E1 Framer
• Manufacturer: Maxim Integrated Products, Inc.

AC CHARACTERISTICS – MULTIPLEXED
PARALLEL PORT (MUX=1)
PARAMETER
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* Set Up time
before DS high
CS1*, CS2*, CS3*,
FSO or FS1 Set Up time
before DS, WR* or
RD* active
CS1*, CS2*, CS3*,
FSO or FS1 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 Set Up time
(see Figures 17-1 to 17-3 for details)
SYMBOL
PW
PW
t
PW
t
t
t
t
t
t
t
t
t
t
t
R
t
t
ASED
DHW
RWH
CYC
RWS
DHR
DDR
DSW
AHL
ASD
ASL
CH
CS
, t
ASH
EH
EL
–40ºC to +85ºC; V
F
(0ºC to 70ºC; V
MIN
200
100
100
10
50
20
10
15
10
20
30
10
20
50
0
0
76 of 87
TYP
DD
DD
= 2.97 to 3.63V for DS21FT40N)
= 2.97 to 3.63V for DS21FT40
MAX
20
50
80
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
DS21FT40