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MT8941AP Datasheet(PDF) 9 Page - Mitel Networks Corporation

Part # MT8941AP
Description  CMOS ST-BUS??FAMILY Advanced T1/CEPT Digital Trunk PLL
PDF  18 Pages
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Manufacturer  MITEL [Mitel Networks Corporation]
Direct Link  http://www.mitel.com
Logo MITEL - Mitel Networks Corporation

MT8941AP Datasheet(HTML) 9 Page - Mitel Networks Corporation

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CMOS
MT8941
3-51
oscillators of DPLL #1 and DPLL #2 to have
maximum
tolerances
of
±32ppm
and
±50ppm
respectively.
However, if DPLL #1 and DPLL #2 are daisy-chained
as shown in Figures 9 and 10, the output clock
tolerance of DPLL #1 will be equal to that of the
DPLL #2 oscillator when DPLL #2 is free-running. In
this case, the oscillator tolerance of DPLL #1 has no
impact on its output clock tolerance. For this reason,
it is recommended to use a ±32 ppm oscillator for
DPLL #2 and a ±100 ppm oscillator for DPLL #1.
Differences between MT8941 and MT8940
The MT8941 and MT8940 are pin and mode
compatible for most applications. However, the user
should take note of the following differences between
the two parts.
Figure 8 - Application Differences between the MT8940 and MT8941
a) Distributed Timing
M
U
X
MT8940
MT8940
8 kHz Reference Signal
8 kHz Reference Signal
Line Card 1
Clocks
Line Card n
Clocks
Data Bus
Line Card 1
Line Card n
MT8941
M
U
X
8 kHz Reference Signal
8 kHz Reference Signal
Clocks
b) Centralized Timing
Data Bus



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