mt8977ac Mitel, mt8977ac Datasheet - Page 20

• Manufacturer Part Number: mt8977ac
• Description: Iso-cmos St-bus ?amily T1/esf Framer Circuit
• Manufacturer: Mitel

MT8977
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.
4-118
1
2
3
4
5
6
7
8
ST-BUS
BIT CELLS
RxSF
TxSF
C2i
F0i
C2i
C2i
F0i
RxSF
F0i
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
ISO-CMOS
Bit
6
Frame 12/24
Figure 13 - Clock & Frame Alignment for ST-BUS Streams
Bit
5
Figure 14 - Clock & Pulse Timing for ST-BUS Streams
t
FPS
Bit
4
†
t
- Clock Timing (Figures 13 & 14)
FPH
t
t
t
Sym
TxSFH
t
TxSFS
t
t
FPOD
t
t
W20
FPW
FPS
P20
FPH
t
FPOD
t
FPS
t
t
TxSFH
t
Frame 1
Bit
P20
FPW
7
Min
400
200
0.5
0.5
50
50
50
Bit
6
t
W20
Bit
Typ
5
488
244
‡
Bit
4
Frame 1
t
124.5
124.5
FPOD
Max
600
300
125
Units
ns
ns
ns
ns
ns
ns
Preliminary Information
s
s
Bit
Frame 2
7
t
t
50 pF Load
t
W20
TxSF
P20
Bit
Test Conditions
= 488 ns
6
Bit
5
Bit
4