ACS8522AT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

ACS8522AT

Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems

Semtech Corporation 

ACS8522A SETS LITE

ADVANCED COMMS & SENSING

Table 8 Input Reference Source Jitter Tolerance

FINAL

DATASHEET

Jitter Tolerance

G.703[6]

G.783[9]

G.823[13]

GR-1244-CORE[19]

Frequency

Monitor

Acceptance

Range

Frequency Acceptance Range

(Pull-in)

Frequency Acceptance Range

(Hold-in)

Frequency Acceptance Range

(Pull-out)

±16.6 ppm

±4.6 ppm (see Note (i))

±9.2 ppm (see Note (ii))

±4.6 ppm (see Note (i))

±9.2 ppm (see Note (ii))

±4.6 ppm (see Note (i))

±9.2 ppm (see Note (ii))

Notes: (i) The frequency acceptance and generation range will be ±4.6 ppm around the required frequency when the external crystal

frequency accuracy is within a tolerance of ±4.6 ppm.

(ii) The fundamental acceptance range and generation range is ±9.2 ppm with an exact external crystal frequency of 12.800 MHz. This

is the default DPLL range, the range is also programmable from 0 to 80 ppm in 0.08 ppm steps.

Figure 8 Minimum Input Jitter Tolerance (OC-3/STM-1)

A0

A1

A2

A3

A4

Jitter and Wander Frequency (log scale)

f0

f1 f2

f3 f4

Note...For inputs supporting G.783[9] compliant sources.)

f5 f6

f7 f8

f9

F8530_003MINIPJITTOLOC3STM1_02

Table 9 Amplitude and Frequency Values for Jitter Tolerance (OC-3/STM-1)

STM

level

STM-1

Peak to peak amplitude (unit

Interval)

Frequency (Hz)

A0 A1 A2 A3 A4 F0 F1 F2 F3

F4 F5 F6 F7 F8 F9

2800 311 39 1.5 0.15 12 u 178 u 1.6 m 15.6 m 0.125 19.3 500 6.5 k 65 k 1.3

Revision 1.00/September 2007 © Semtech Corp.

Page 25

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