MT8976 Mitel Networks Corporation, MT8976 Datasheet - Page 21

• Manufacturer Part Number: MT8976
• Description: ISO-CMOS ST-BUS FAMILY T1/ESF Framer Circuit
• Manufacturer: Mitel Networks Corporation

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
1
2
3
4
5
6
7
8
Received
DS1 Bits
E1.5i
E8Ko
XCtl
C2i
External Control Delay
External Status Setup Time
External Status Hold Time
8 kHz Output Delay
8 kHz Output Low Width
8 kHz Output High Width
8 kHz Rise Time
8 kHz Fall Time
2.0V
0.8V
0.4V
2.0V
0.8V
2.4V
0.4V
2.4V
Bit 0 Channel 15 and Bit 7 Channel 16
Figure 16 - XCtl Timing
ST-BUS Bit Cell Boundary Between
Parameters
t
Channel 2
8OD
Bit 1
†
t
- XCtl, XSt, & E8Ko (Figures 16, 17, & 18)
XCD
t
8F
Figure 18 - E8Ko Timing
• • •
Sym
t
t
t
t
t
t
XCD
XSH
8OD
8OH
t
XSS
8OL
t
8R
8F
Min
t
8OL
t
Channel 17
8OD
Typ
XSt
C2i
78
47
Bit 2
‡
2.0V
0.8V
2.0V
0.8V
Max
140
100
400
150
10
10
t
Bit 2 Channel 30 and Bit 1 Channel 30
8R
ST-BUS Bit Cell Boundary Between
Figure 17 - XSt Timing
• • •
Units
ISO-CMOS
ns
ns
ns
ns
ns
ns
s
s
50 pF Load
50 pF Load
50 pF Load
50 pF Load
50 pF Load
50 pF Load
.
t
8OH
t
Test Conditions
XSS
t
Channel 2
8OD
Bit 1
MT8976
t
XSH
t
8F
4-49