mt8977ac Mitel, mt8977ac Datasheet - Page 21

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

AC Electrical Characteristics
† Timing is over recommended temperature & power supply voltage ranges.
‡ Typical figures are at 25°C and are for design aid only; not guaranteed and not subject to production testing.
AC Electrical Characteristics
† Timing is over recommended temperature & power supply voltage ranges.
‡ Typical figures are at 25 C and are for design aid only; not guaranteed and not subject to production testing.
Preliminary Information
DS1 BIT CELLS FOR
RECEPTION
DSTo or
CSTo
DSTi,
CSTi0/CSTi1
1
2
1
2
3
C2i
E1.5i
E1.5i Clock Period
E1.5i Clock Width High or Low
Serial Output Delay
Serial Input Setup Time
Serial Input Hold Time
0.8V
2.0V
0.8V
2.4V
0.4V
2.0V
2.0V
0.8V
Characteristics
Characteristics
Figure 15 - DS1 Receive Clock Timing
†
†
t
Figure 16 - ST-BUS Stream Timing
BIT CELL
SOD
- Timing For DS1 Link Bit Cells (Figure 15)
- 2048 kbit/s ST-BUS Streams (Figure 16)
t
PEC
Sym
t
Sym
t
t
WEC
PEC
t
t
SOD
SIH
SIS
t
SIS
Min
500
250
Min
15
50
Bit Cell Boundaries
Typ
Typ
648
324
‡
‡
t
SIH
Max
Max
125
t
WEC
Units
Units
ns
ns
ns
ns
ns
ISO-CMOS
BIT CELL
t
150 pF load
PEC
= 648 ns
t
Test Conditions
Test Conditions
SOD
t
WEC
MT8977
4-119