MT8976 Mitel Networks Corporation, MT8976 Datasheet - Page 19

• Manufacturer Part Number: MT8976
• Description: ISO-CMOS ST-BUS FAMILY T1/ESF Framer Circuit
• Manufacturer: Mitel Networks Corporation

AC Electrical Characteristics
† 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.
ST-BUS
BIT CELLS
1
2
3
4
5
6
7
8
RxSF
TxSF
C2i
F0i
C2i
F0i
RxSF
F0i
C2i
TxSF
C2i Clock Period
C2i Clock Width High or Low
Frame Pulse Setup Time
Frame Pulse Hold Time
Frame Pulse Width
RxSF Output Delay
TxSF Hold Time
TxSF Setup Time
2.4V
0.4V
2.0V
0.8V
2.0V
0.8V
2.0V
0.8V
2.0V
0.8V
Characteristics
Bit
Frame 12/24
7
Bit
6
Figure 13 - Clock & Frame Pulse Timing for ST-BUS Streams
Frame 12/24
Figure 12 - Clock & Frame Alignment for ST-BUS Streams
Bit
5
t
FPS
Bit
4
†
t
FPH
- Clock Timing (Figures 12 & 13)
t
t
t
Sym
TxSFH
TxSFS
t
t
t
FPOD
t
t
W20
FPW
t
FPS
FPH
P20
FPOD
t
FPS
t
t
TxSFH
t
P20
FPW
Frame 1
Bit
7
Min
400
200
0.5
0.5
50
50
50
Bit
6
t
W20
Bit
5
Typ
488
244
‡
Bit
4
Frame 1
t
124.5
124.5
FPOD
Max
600
300
125
Units
ISO-CMOS
ns
ns
ns
ns
ns
ns
s
s
t
50pF Load
P20
Bit
Frame 2
t
7
t
W20
TxSF
= 488 ns
Test Conditions
Bit
6
Bit
5
MT8976
Bit
4
4-47