MT8977 ISO-CMOS
Preliminary Information
AC Electrical Characteristics† - XCtl, XSt, & E8Ko (Figures 17, 18 and 19)
‡
Parameters
Sym
Min
Typ
Max
Units
Test Conditions
50 pF Load
1
2
3
4
5
6
7
8
External Control Delay
External Status Setup Time
External Status Hold Time
8 kHz Output Delay
tXCD
tXSS
tXSH
t8OD
t8OL
t8OH
t8R
140
100
400
150
ns
ns
ns
ns
µs
µs
ns
ns
50 pF Load
50 pF Load
50 pF Load
50 pF Load
50 pF Load
8 kHz Output Low Width
8 kHz Output High Width
8 kHz Rise Time
78
47
10
10
8 kHz Fall Time
t8F
† 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.
ST-BUS Bit Cell Boundary Between
Bit 2 Channel 30 and Bit 1 Channel 30
ST-BUS Bit Cell Boundary Between
Bit 0 Channel 15 and Bit 7 Channel 16
2.0V
0.8V
2.0V
0.8V
C2i
XSt
C2i
2.0V
0.8V
2.4V
0.4V
XCtl
tXCD
tXSS
tXSH
Figure 18 - XSt Timing
Figure 17 - XCtl Timing
Channel 2
Bit 1
Channel 17
Bit 2
Channel 2
Bit 1
Received
DS1 Bits
•
• •
• • •
2.0V
E1.5i
E8Ko
0.8V
t8OD
t8OD
t8OD
2.4V
0.4V
t
t8OL
8OH
t8F
t8R
t8F
Figure 19 - E8Ko Timing
4-120
MITEL [ MITEL NETWORKS CORPORATION ]
