MT8985
AC Electrical Characteristics† - ST-BUS Timing
Voltages are with respect to ground (VSS) unless otherwise stated.
‡
Characteristics
1 Frame Pulse width
Sym
Min
Typ
Max
Units
Test Conditions
tF0iW
tF0iS
tF0iH
tDAA
tSTiS
tSTiH
tC4i
244
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2 Frame Pulse setup time
3 Frame Pulse hold time
4 STo delay Active to Active
5 STi setup time
10
20
190
190
100
45
C =150 pF
L
20
20
6 STi hold time
7 Clock period
200
85
244
122
122
300
150
150
10
8 CK Input Low
tCL
tCH
9 CK Input High
85
10 Clock Rise/Fall Time
tr,tf
† Timing is over recommended temperature & power supply voltages (VDD=5V±5%, VSS=0V, TA=–40 to 85°C).
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
t
F0iW
2.0V
0.8V
F0i
C4i
t
t
t
CH
C4i
CL
t
F0iH
2.0V
0.8V
t
f
t
F0iS
t
r
t
DAA
2.0V
0.8V
Ch. 31
Bit 0
Ch. 0
Bit 7
Ch. 0
Bit 6
Ch. 0
Bit 5
STo
STi
tSTiS
t
STiH
2.0V
0.8V
Ch. 31
Bit 0
Ch. 0
Bit 7
Ch. 0
Bit 6
Ch. 0
Bit 5
Figure 13 - ST-BUS Timing
2-58
MITEL [ MITEL NETWORKS CORPORATION ]
