mt8977ac Mitel, mt8977ac Datasheet - Page 23

• 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.
Note 1: The parameters t
device specifications.
Preliminary Information
Transmitted DS1 Link
Bit Cells
C1.5i
TxA
or
TxB
1
2
3
4
5
6
7
8
Received DS1 Link
Bit Cells
RxA
or
RxB
E1.5i
RxD
Transmit Steering Delay
Transmit Steering Transition Time
Received Steering Setup Time
Received Steering Hold Time
Received Data Setup Time
Received Data Hold Time
C1.5i Period
C1.5i Pulse Width High or Low
2.0V
0.8V
2.4V
0.4V
2.0V
2.0V
0.8V
0.8V
2.0V
0.8V
Parameters
RDS
and t
Figure 21 - Receive Timing for DS1 Link (see Note 1)
RDH
t
TST
are related to device functionality. Network constraints may require tighter tolerances than the
Figure 20 - Transmit Timing for DS1 Link
†
- DS1 Link Timing (Figures 20 and 21)
t
TSD
t
WC1.5
t
t
Sym
WC1.5
t
t
t
t
t
t
PC1.5
t
RSS
RDH
RSS
RSH
RDS
TSD
TST
Bit Cell
t
RDS
Min
500
250
-15
50
30
60
0
Bit Cell
t
PC1.5
Typ
648
324
t
RSH
‡
t
RDH
t
Max
150
800
TSD
30
t
TST
ISO-CMOS
Units
ns
ns
ns
ns
ns
ns
ns
ns
150 pF Load
See Note 1
150 pF Load
See Note 1
t
PC1.5
Test Conditions
= 648 ns
MT8977
4-121