Preliminary Information
MH89770
AC Electrical Characteristics† - Timing For DS1 Link Bit Cells (Figure 21)
‡
Characteristics
Sym
Min
Typ
Max
Units
Test Conditions
1
2
3
4
E1.50 Clock Period
tPEC
tWEC
tREC
tFEC
648
324
60
ns
ns
ns
ns
E1.5o Clock Width High or Low
E1.5o Clock Rise Time
E1.5o Clock Fall Time
20
† 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.
BIT CELL
DS1 BIT CELLS FOR
RECEPTION
BIT CELL
t
t
W1EC
R1EC
V
V
OH
E1.5o
OL
t
R1EC
t
t
P1EC
W1EC
Figure 21 - DS1 Receive Clock Timing
AC Electrical Characteristics† - 2048 kbit/s ST-BUS Streams (Figure 22)
‡
Characteristics
Sym
Min
Typ
Max
Units
Test Conditions
1
2
3
Serial Output Delay
tSOD
tSIS
125
ns
ns
ns
150pF load
Serial Input Setup Time
Serial Input Hold Time
15
50
tSIH
† 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.
Bit Cell Boundaries
V
V
IH
IL
C2i
DSTo
or CSTo
V
V
OH
OL
t
t
SOD
SOD
DSTi,
CSTi0/CSTi1
V
V
IH
IL
t
t
SIH
SIS
Figure 22 - ST-BUS Stream Timing
4-153
MITEL [ MITEL NETWORKS CORPORATION ]
