ACS8520T Semtech, ACS8520T Datasheet - Page 27

• Manufacturer Part Number: ACS8520T
• Description: Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
• Manufacturer: Semtech

Table 8 Input Reference Source Jitter Tolerance
Notes: (i) The frequency acceptance and generation range will be ±4.6 ppm around the required frequency when the external crystal
Figure 9 Minimum Input Jitter Tolerance (OC-3/STM-1)
Revision 3.02/October 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
G.703
G.783
G.823
GR-1244-CORE
Jitter Tolerance
[6]
[9]
[13]
(ii) The fundamental acceptance range and generation range is ±9.2 ppm with an exact external crystal frequency of 12.800 MHz. This
frequency accuracy is within a tolerance of ±4.6 ppm.
is the default DPLL range, the range is also programmable from 0 to 80 ppm in 0.08 ppm steps.
A0
A1
A2
A3
A4
Note...For inputs supporting G.783
Table 9 Amplitude and Frequency Values for Jitter Tolerance (OC-3/STM-1)
STM-1
level
STM
[19]
f0
±16.6 ppm
2800
Peak to peak amplitude (unit
Acceptance
Frequency
A0
Monitor
Range
311 39 1.5 0.15
A1
Interval)
f1
A2
±4.6 ppm (see Note (i))
±9.2 ppm (see Note (ii))
Frequency Acceptance Range
A3
f2
[9]
compliant sources.)
A4
(Pull-in)
12 u 178 u 1.6 m 15.6 m 0.125
F0
f3
F1
FINAL
Page 27
f4
F2
±4.6 ppm (see Note (i))
±9.2 ppm (see Note (ii))
Frequency Acceptance Range
F3
f5
Frequency (Hz)
(Hold-in)
Jitter and Wander Frequency (log scale)
f6
F4
19.3
F5
f7
F8530_003MINIPJITTOLOC3STM1_02
500 6.5 k 65 k 1.3
F6
f8
ACS8520 SETS
±4.6 ppm (see Note (i))
±9.2 ppm (see Note (ii))
Frequency Acceptance Range
F7
f9
F8
(Pull-out)
DATASHEET
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F9