PRELIMINARY
PM4318 OCTLIU
DATASHEET
PMC- 2001578
ISSUE 3
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
Figure 13 – TJAT Jitter Transfer
0
-10
62411
max
43802
max
62411
min
JITTER
GAIN
dB
-20
-30
-40
-50
JAT
response
1
10
100
1k
10k
5.7
JITTER FREQUENCY
Hz
T1
In the non-attenuating mode, when the FIFO is within one UI of overrunning or underrunning, the
tracking range is 1.48 MHz to 1.608 MHz.
The guaranteed linear operating range for the jittered input clock is 1.544 MHz ± 200 Hz with
worst case jitter (61 Uipp), and maximum system clock frequency offset (± 100 ppm). The
nominal range is 1.544 MHz ± 963 Hz with no jitter or system clock frequency offset.
E1
In the non-attenuating mode, when the FIFO is within one UI of overrunning or underrunning, the
tracking range is 2.13 MHz to 1.97 MHz.
The guaranteed linear operating range for the jittered input clock is 2.048 MHz ± 300 Hz with
worst case jitter (61 Uipp), and maximum system clock frequency offset (± 100 ppm). The
nominal range is 2.048 MHz ± 1277 Hz with no jitter or system clock frequency offset.
Jitter Generation
In the absence of input jitter, the output jitter shall be less than 0.025 Uipp. This complies with the
AT&T TR 62411 requirement of less than 0.025 Uipp of jitter generation.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
43
PMC [ PMC-SIERRA, INC ]
