ACS8520 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

ACS8520

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

Semtech Corporation 

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ACS8520 SETS

ADVANCED COMMUNICATIONS

Table 14 Output Frequency Selection (cont...)

FINAL

Frequency (MHz, unless stated otherwise)

T0 DPLL Mode

98.304 (TO6 only)

98.816 (TO6 only)

131.07 (TO6 only)

137.47 (TO4/TO5 only)

148.22 (TO6 only)

155.52 (TO4/TO5 only)

155.52 (TO6/TO7 only)

155.52 (TO6/TO7 only)

311.04 (TO6 only)

311.04 (TO6 only)

12E1 mode

16DS1 mode

16E1 mode

-

24DS1 mode

-

77.76 MHz analog

77.76 MHz digital

77.76 MHz analog

77.76 MHz digital

DATASHEET

T4 DPLL Mode T4 APLL Input Mux

-

-

-

-

-

-

E3 mode

Select T4 DPLL

-

-

77.76 MHz mode Select T4 DPLL

-

-

-

-

-

-

-

-

Jitter Level (typ)

rms p-p

(ps) (ns)

900 4.5

760 2.6

250 1.6

120 1.0

110 0.75

60 0.6

60 0.6

60 0.6

60 0.6

60 0.6

Table 15 Frequency Divider Look-up

APLL

Frequency

APLL/2

311.04

155.52

APLL/4

77.76

APLL/6

51.84

274.944

137.472

68.376

-

178.944

148.224

131.072

98.816

89.472

74.112

65.536

49.408

44.736

37.056

32.768

24.704

-

24,704

21.84533

16.46933

98.304

49.152

24.576

16.384

APLL/8

38.88

34.368

22.368

18.528

16.384

12.352

12.288

APLL/12

APLL/16

APLL/48

APLL/64

25.92

-

-

12.352

10.92267

8.234667

8.192

19.44

17.184

11.184

9.264

8.192

6.176

6.144

6.48

5.728

3.728

3.088

2.730667

2.058667

2.048

4.86

4.296

2.796

2.316

2.048

1.544

1.536

Note...All frequencies in MHz

Revision 3.02/October 2005 © Semtech Corp.

Page 39

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