MT8941 Mitel Networks Corporation, MT8941 Datasheet - Page 9

• Manufacturer Part Number: MT8941
• Description: CMOS ST-BUS FAMILY Advanced T1/CEPT Digital Trunk PLL
• Manufacturer: Mitel Networks Corporation

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,
a) Distributed Timing
b) Centralized Timing
8 kHz Reference Signal
8 kHz Reference Signal
M
U
X
MT8941
8 kHz Reference Signal
Figure 8 - Application Differences between the MT8940 and MT8941
8 kHz Reference Signal
M
U
X
Clocks
Data Bus
Data Bus
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.
MT8940
MT8940
Line Card n
Line Card 1
Line Card n
Line Card 1
Clocks
Clocks
CMOS
MT8941
3-51