SY89426(1999) データシートの表示（PDF） - Micrel
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SY89426 Datasheet PDF : 6 Pages
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Micrel
ClockWorks™
SY89426
JITTER GENERATION
Jitter Generation Definition
Bellcore TR-NWT-000499 (Issue 4), section 7.3.3 "Jitter
generation is the process whereby jitter appears at the output
port of an individual unit of digital equipment in the absence of
applied input jitter."
Jitter Generation Requirement
Bellcore TA-NWT-000253 (Issue 2), section 5.6.5.2 "For
Category II interfaces, jitter generation shall not exceed 0.01
UI rms. For OC-N and STSX-N interfaces, a high-pass
measurement filter with a 12kHz cutoff frequency shall be
used." The low-pass cutoff frequency of the measurement
filter shall be higher than 5MHz.
The characteristic of the measurement filter is shown
below.
SONET OC-12 Category II Jitter Generation Measurement Filter Characteristics
UI (rms)
0.01
+20dB/decade
12kHz
Figure 1
Frequency
5MHz
(minimum)
PRODUCT ORDERING CODE
Ordering
Code
SY89426JC
SY89426JCTR
SY89426JI
SY89426JITR
Package
Type
J28-1
J28-1
J28-1
J28-1
Operating
Range
Commercial
Commercial
Industrial
Industrial
5
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