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MT8981DP Datenblatt(PDF) 13 Page - Mitel Networks Corporation

Teilenummer MT8981DP
Bauteilbeschribung  ISO-CMOS ST-BUS??FAMILY Digital Switch
PDF  14 Pages
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Hersteller  MITEL [Mitel Networks Corporation]
Direct Link  http://www.mitel.com
Logo MITEL - Mitel Networks Corporation

MT8981DP Datenblatt(HTML) 13 Page - Mitel Networks Corporation

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ISO-CMOS
MT8981D
2-29
† 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 RL, with timing corrected to cancel time taken to discharge CL.
ΠProcessor accesses are dependent on the C4i clock, and so some timings are expressed as multiples of the C4i clock period.
Figure 17 - Processor Bus
AC Electrical Characteristics† - Processor Bus (Figures 11 and 17)
Characteristics
Sym
Min
Typ‡
Max
Units
Test Conditions
1
Chip Select Setup Time
tCSS
20
0
ns
2
Read/Write Setup Time
tRWS
25
5
ns
3
Address Setup Time
t
ADS
25
5
ns
4
Acknowledgement Delay Fast
Slow
t
AKD
40
100
ns
C
L=150 pF
t
AKD
2.7
7.2
cycles
C4i cycles
Œ
5
Fast Write Data Setup Time
t
FWS
20
ns
6
Slow Write Data Delay
tSWD
2.0
1.7
cycles
C4i cycles
Œ
7
Read Data Setup Time
tRDS
0.5
cycles
C4i cycles
Œ, C
L= 150 pF
8
Data Hold Time
Read
Write
tDHT
20
ns
RL=1 KΩ∗, CL=150 pF
tDHT
20
10
ns
9
Read Data To High Impedance
tRDZ
50
90
ns
RL=1 KΩ∗, CL=150 pF
10
Chip Select Hold Time
tCSH
0ns
11
Read/Write Hold Time
tRWH
0ns
12
Address Hold Time
tADH
0ns
13
Acknowledgement Hold Time
tAKH
10
60
80
ns
RL=1 KΩ∗, CL=150 pF
DS
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)
CS
R/W
A5
DTA
D7
tCSS
tRWS
tADS
tAKD
tRDS
tSWD
tFWS
tCSH
tRWH
tADH
tAKH
tDHT
*
*
*
*
tRDZ
to
A0
to
D0



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