MT90812 Datasheet, PDF (95/105 Pages) Mitel Networks Corporation – Integrated Digital Switch (IDX)

Advance Information
MT90812
24.3 AC Parameters Referenced to Outgoing C4 or C8 Clock Signals
AC parameters are either measured with respect to incoming or outgoing clock signals. A list of the Clock
Control Modes for the Local or Expansion Bus streams where the AC parameters are measured with respect to
the outgoing clock signals are listed in Table 24. The parametric values are listed in the following tables.
TDM and
Data Rate
Clock Control
Mode
PCS PC0S
CLK
FP
CLK Rate/
Data Rate
Timing Diagram
Local 2 Mb/s
all
1
1
C4o
F4o
2
EBUS 2 Mb/s
EBUS 4Mb/s
all
C4/F4
1
1
C4o
F4o
X
X C8 (Output) F8
2
Fig. 40 (ST-Bus) &
2
Fig. 41 (GCI)
C8/F8, C8P, C16 1
1 C8 (Output) F8
2
EBUS 8Mb/s
C4/F4
X
X C8 (Output) F8
1*
Fig. 42 (ST-Bus) &
Fig. 43 (GCI)
C8/F8, C8P, C16 1
1 C8 (Output) F8
1*
Fig. 40 (ST-Bus) &
Fig. 41 (GCI)
Table 24 - Timing Referenced to Output Clock Signals for TDM Streams
* Clock Rate/Data Rate=1, however the incoming data is clocked with the PLL generated clock at 3 quarters into the bit cell.
AC Electrical Characteristics - Output Delay Parameters Referenced to Output C4/C8
Signals
Characteristics
Sym
Min
Max Units
Test Conditions†
Output Driver Enable Delay
(2.048, 4.096, 8.192 Mb/s)
t_OED
55
ns 3
STo delay from active to High-Z, active
to High-Z
2.048 Mb/s - Sto0,Sto1, EST0
4.096 Mb/s
8.192 Mb/s
t_DZ,t_ZD
35
ns 3, 11, 14, 15, 19
40
ns 3, 11, 14, 16, 20
40
ns 3, 11, 14, 16, 20
Sto Delay (high and low)
t_SToD
from CLK falling (ST-Bus mode)
from CLK rising (GCI mode)
2.048 Mb/s - Sto0,Sto1,EST0
4.096 Mb/s
8.192 Mb/s
35
ns 3, 11, 14, 15, 19
40
ns 3, 11, 14, 16, 20
40
ns 3, 11, 14, 16, 20
† See "Notes" following AC Electrical Characteristics tables.
AC Electrical Characteristics - Input Set and Hold Parameters Referenced to Output C4/
C8 Signals
Characteristics
Sym
Min
Max Units
Test Conditions†
Sti Set-up Time
before CLK rising (ST-Bus mode)
before CLK falling (GCI mode)
2.048 Mb/s - Sto0,Sto1,EST1
4.096 Mb/s
8.192 Mb/s
t_STiS
20
15
10
Sti Hold Time
before CLK rising (ST-Bus mode)
before CLK falling (GCI mode)
2.048 Mb/s - Sto0,Sto1,EST1
4.096 Mb/s
8.192 Mb/s
t_STiH
30
25
25
† See "Notes" following AC Electrical Characteristics tables.
ns 3, 11, 14, 15, 19
ns 3, 11, 14, 15, 20
ns 3, 11, 14, 15, 20
ns 3, 11, 14, 15, 19
ns 3, 11, 14, 15, 20
ns 3, 11, 14, 15, 20
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