mt8981dl Mitel, mt8981dl Datasheet - Page 13

• Manufacturer Part Number: mt8981dl
• Description: Iso-cmos St-bus ?amily Digital Switch
• Manufacturer: Mitel

AC Electrical Characteristics
† Timing is over recommended temperature & power supply voltages.
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
* High Impedance is measured by pulling to the appropriate rail with R
10
12
13
11
CS
R/W
A5
to
A0
DTA
D7
1
2
3
4
5
6
7
8
9
Processor accesses are dependent on the C4i clock, and so some timings are expressed as multiples of the C4i clock period.
DS
to
D0
Chip Select Setup Time
Read/Write Setup Time
Address Setup Time
Acknowledgement Delay Fast
Fast Write Data Setup Time
Slow Write Data Delay
Read Data Setup Time
Data Hold Time
Read Data To High Impedance
Chip Select Hold Time
Read/Write Hold Time
Address Hold Time
Acknowledgement Hold Time
2.0V
0.8V
2.0V
0.8V
2.0V
0.8V
2.0V
0.8V
2.4V
0.4V
2.4V (Read) 2.0V (Write)
0.8V (Read 0.8V (Write)
Characteristics
t
t
t
CSS
RWS
ADS
*
Read
Write
Slow
*
†
t
SWD
- Processor Bus (Figures 11 and 17)
Figure 17 - Processor Bus
Sym
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RWS
SWD
RWH
RDS
CSH
ADH
CSS
ADS
AKD
AKD
DHT
DHT
RDZ
AKH
FWS
t
RDS
Min
2.7
t
20
25
25
20
20
20
10
AKD
0
0
0
L
, with timing corrected to cancel time taken to discharge C
Typ
2.0
40
10
50
60
0
5
5
‡
t
FWS
Max
100
7.2
1.7
0.5
90
80
ISO-CMOS
cycles
cycles
cycles
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
C
C4i cycles
C4i cycles
C4i cycles , C
R
R
R
L
L
L
L
=150 pF
=1 K
=1 K
=1 K
t
t
AKH
Test Conditions
DHT
t
RDZ
, C
, C
, C
MT8981D
L
L
L
t
t
t
=150 pF
=150 pF
=150 pF
CSH
RWH
ADH
L
= 150 pF
L
*
.
*
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