ACS8525T Semtech, ACS8525T Datasheet - Page 27

• Manufacturer Part Number: ACS8525T
• Description: Line Card Protection Switch for SONET/SDH Systems
• Manufacturer: Semtech

Table 8 Frequency Divider Look-up
Note...All frequencies in MHz
Table 9 APLL1 Frequencies
Note...If using Synthesis for inputs to both APLL1 and APLL2, then they must both use the same synthesis settings.
Table 10 APLL2 Frequencies
Revision 3.01/August 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
OC-N Rates
E3
DS3
24DS1
16E1
16DS1
12E1
311.04
311.04 MHz
98.304 MHz
131.072 MHz
148.224 MHz
98.816 MHz
311.04 MHz
311.04 MHz
98.304 MHz
131.072 MHz
148.224 MHz
Transmission Rate
Frequency
APLL1 Frequency
APLL2
-
-
DPLL2-Squelched
DPLL2-Normal
DPLL2-12E1
DPLL2-16E1
DPLL2-24DS1
DPLL Mode
311.04
274.944
178.944
148.224
131.072
98.816
98.304
APLL Frequency
Normal (digital feedback)
Normal (analog feedback)
12E1 (digital feedback)
16E1 (digital feedback)
24DS1 (digital feedback)
16DS1 (digital feedback)
Do not use
Do not use
Synthesis/MUX setting for
DPLL2 Forward
DFS Frequency
77.76
77.76
24.576
32.768
37.056
(2*18.528)
APLL1 input
(MHz)
155.52
137.472
89.472
74.112
65.536
49.408
49.152
APLL/2
DPLL2 Freq Control
77.76
68.376
44.736
37.056
32.768
24.704
24.576
APLL/4
Reg. 64 Bits [2:0]
Register Bits
000
011
001
010
100
FINAL
Page 27
DPLL1 Frequency Control Register Bits
51.84
24,704
21.84533
16.46933
16.384
APLL/6
-
-
Reg. 65 Bits[2:0]
0 (DPLL2 enabled)
0 (DPLL2 enabled)
0 (DPLL2 enabled)
0 (DPLL2 enabled)
0 (DPLL2 enabled)
APLL2 Input from
38.88
34.368
22.368
18.528
16.384
12.352
12.288
APLL/8
Reg. 65 Bit 6
DPLL1 or 2.
000
010
011
100
101
110
111
001
25.92
12.352
10.92267
8.234667
8.192
APLL/12
-
-
DPLL1 + Synthesis
Reg. 65 Bits [5:4]
19.44
17.184
11.184
9.264
8.192
6.176
6.144
Freq to APLL2
APLL/16
Register Bits
ACS8525 LC/P
XX
XX
XX
XX
XX
6.48
5.728
3.728
3.088
2.730667
2.058667
2.048
Output Jitter Level
APLL/48
DATASHEET
www.semtech.com
ns (p-p)
<0.5
<0.5
<2
<2
<2
<2
Output Jitter
Level ns (p-p)
<0.5
<0.5
<0.5
<0.5
<0.5
-
-
2.048
1.536
4.86
4.296
2.796
2.316
1.544
APLL/64