參數(shù)資料
型號(hào): MT8977AE
廠商: Mitel Networks Corporation
元件分類(lèi): 通信及網(wǎng)絡(luò)
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁(yè)數(shù): 20/26頁(yè)
文件大小: 344K
代理商: MT8977AE
MT8977
ISO-CMOS
Preliminary Information
4-118
Timing is over recommended temperature & power supply voltages
Typical figures are at 25
°
C and are for design aid only: not guaranteed and not subject to production testing.
Figure 13 - Clock & Frame Alignment for ST-BUS Streams
Figure 14 - Clock & Pulse Timing for ST-BUS Streams
AC Electrical Characteristics
- Clock Timing (Figures 13 & 14)
Characteristics
Sym
Min
Typ
Max
Units
Test Conditions
1
C2i Clock Period
t
P20
400
488
600
ns
2
C2i Clock Width High or Low
t
W20
200
244
300
ns
t
P20
= 488 ns
3
Frame Pulse Setup Time
t
FPS
50
ns
4
Frame Pulse Hold Time
t
FPH
50
ns
5
Frame Pulse Width
t
FPW
50
ns
6
RxSF Output Delay
t
FPOD
125
ns
50 pF Load
7
TxSF Hold Time
t
TxSFH
0.5
124.5
μ
s
8
TxSF Setup Time
t
TxSFS
0.5
124.5
μ
s
Frame 12/24
Frame 1
Frame 2
Bit
7
Bit
6
Bit
5
Bit
4
Bit
7
Bit
6
Bit
5
Bit
4
Bit
7
Bit
6
Bit
5
Bit
4
ST-BUS
BIT CELLS
TxSF
F0i
RxSF
C2i
t
P20
t
W20
t
W20
t
FPS
t
FPH
t
FPS
t
FPOD
t
FPOD
Frame 12/24
Frame 1
t
TxSFH
t
TxSF
2.0V
0.8V
2.4V
0.4V
2.0V
0.8V
2.0V
0.8V
2.0V
0.8V
C2i
F0i
F0i
C2i
TxSF
RxSF
t
FPW
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