MT8986
_
AC Electrical Characteristics† ST-BUS Timing (2.048 Mb/s)
Voltages are with respect to ground (VSS) unless otherwise stated.
‡
Characteristics
Frame Pulse width
Sym
Min
Typ
Max
Units
Test Conditions
1
2
3
4
5
6
7
8
9
tFRW
tFRS
tFRH
tDAA
tSTIS
tSTIH
tCLK
tCL
244
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Frame Pulse setup time
Frame Pulse hold time
STo delay Active to Active
STi setup time
10
20
190
190
100
45
C =150 pF
L
20
20
STi hold time
Clock period
190
85
244
122
122
300
150
150
10
CK Input Low
tCH
CK Input High
85
tr,tf
10 Clock Rise/Fall Time
† 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.
tFRW
2.0V
0.8V
FR
tCH
tCLK
tCL
tFRH
2.0V
0.8V
STi
tFRS
tr
tf
tDAA
2.0V
0.8V
Ch.0
Bit 5
Ch. 31
Bit 0
Ch. 0
Bit 7
Ch. 0
Bit 6
STo
STi
tSTIS
tSTIH
2.0V
0.8V
Ch. 31
Bit 0
Ch. 0
Bit 7
Ch. 0
Bit 6
Ch. 0
Bit 5
Figure 16 - ST-BUS Timing (CLKM bit=0)
2-86
MITEL [ MITEL NETWORKS CORPORATION ]
