參數(shù)資料
型號(hào): LXT6251A
英文描述: ATM/SONET MAPPER|CMOS|QFP|208PIN|PLASTIC
中文描述: 的ATM / SONET的映射器|的CMOS | QFP封裝| 208PIN |塑料
文件頁(yè)數(shù): 43/76頁(yè)
文件大?。?/td> 995K
代理商: LXT6251A
21 E1 SDH Mapper
LXT6251A
Datasheet
43
Figure 14. Tributary Timing
Table 11. Tributary Timing Parameters
Parameter
Symbol
t
ME1PWL
t
ME1PWH
t
ME1CYC
t
ME1SU
Min
Typ
Max
Unit
MTCx Input E1 Clock pulse width low
TM + 3
1
ns
MTCx Input E1 Clock pulse width high
TM + 5
1
ns
MTCx Input E1 Clock cycle time
488
ns
MTDx setup time to MTCx rising edge
4
ns
MTDx hold time from MTCx rising edge
tME1H
2
ns
DTCx output clock pulse width low
tDE1pwl
2(1+2S)TD - 5
2,3
2(1+2S)TD
2,3
5(1+2S)TD + 2
2,3
ns
DTCx output clock pulse width high
tDE1pwh
(1+2S)TD - 2
2,3
(1+2S)TD
2,3
(1+2S)TD + 5
2,3
ns
DTCx output E1 Clock cycle time
tDE1CYC
3(1+2S)TD
2,3
6(1+2S)T D
2,3
ns
DTDx delay from DTCx rising edge
tDE1pd
9
ns
1. TM is the clock period of MTBYCK
2. TD is the clock period of DTBYCK
3. S is
0
for STM0 application and
1
for STM1 application.
t
ME1h
t
ME1su
t
ME1pwl
t
DE1pd
t
ME1pwh
t
DE1pwh
t
ME1cyc
t
DE1cyc
t
DE1pwl
MTCx
MTDx
DTDx
DTCx
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