ACS8522 datasheet(35/118 Pages) SEMTECH

Part #	ACS8522

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

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ADVANCED COMMUNICATIONS

FINAL

DATASHEET

Revision 5/November 2006 © Semtech Corp.

Page 35

www.semtech.com

ACS8522 SETS LITE

Note...All frequencies in MHz

155.52 (O4 only)

-

77.76 MHz mode

Select T4 DPLL

60

0.6

155.52 (O1 only)

77.76 MHz analog

-

60

0.6

155.52 (O1 only)

77.76 MHz digital

-

60

0.6

311.04 (O1 only)

77.76 MHz analog

-

60

0.6

311.04 (O1 only)

77.76 MHz digital

-

60

0.6

Table 13 Frequency Divider Look-up

APLL

Frequency

APLL/2

APLL/4

APLL/6

APLL/8

APLL/12

APLL/16

APLL/48

APLL/64

311.04

155.52

77.76

51.84

38.88

25.92

19.44

6.48

4.86

274.944

137.472

68.376

-

34.368

-

17.184

5.728

4.296

178.944

89.472

44.736

-

22.368

-

11.184

3.728

2.796

148.224

74.112

37.056

24,704

18.528

12.352

9.264

3.088

2.316

131.072

65.536

32.768

21.84533

16.384

10.92267

8.192

2.730667

2.048

98.816

49.408

24.704

16.46933

12.352

8.234667

6.176

2.058667

1.544

98.304

49.152

24.576

16.384

12.288

8.192

6.144

2.048

1.536

Table 12 Output Frequency Selection (cont...)

Frequency (MHz, unless stated otherwise)

T0 DPLL Mode

T4 DPLL Mode

T4 APLL Input Mux

Jitter Level (typ)

rms

(ps)

pk-pk

(ns)

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