MT8985
AC Electrical Characteristics† - Serial Streams for ST-BUS and GCI Backplanes
‡
Characteristics
Sym
Min
Typ
Max Units
Test Conditions
O
U
T
P
U
T
1
2
3
4
STo0/7 Delay - Active to High Z
STo0/7 Delay - High Z to Active
Output Driver Enable Delay
CSTo Output Delay
tSAZ
tSZA
tOED
tXCD
100
100
65
ns
ns
ns
ns
R =1 KΩ*, C =150 pF
L
L
C =150 pF
L
R =1 KΩ*, C =150 pF
L
L
0
60
C =150 pF
L
S
† 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 , with timing corrected to cancel time taken to discharge C .
L
L
2.0V
0.8V
Bit Cell Boundary
ODE
(GCI)
2.0V
0.8V
C4i
(ST-BUS)
STo0
to
2.4V
*
*
STo7 0.4V
STo0
to
2.4V
*
t
t
OED
OED
STo7 0.4V
t
SAZ
Figure 16 - Output Driver Enable
2.4V
0.4V
STo0
to
STo7
*
t
SZA
2.4V
0.4V
CSTo
t
XCD
Figure 15 - Serial Outputs and External Control
2-60
MITEL [ MITEL NETWORKS CORPORATION ]
