ACS8520T Semtech, ACS8520T Datasheet - Page 40

• Manufacturer Part Number: ACS8520T
• Description: Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
• Manufacturer: Semtech

Table 16 T0 APLL Frequencies
Table 17 T4 APLL Frequencies
Revision 3.02/October 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
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
98.816 MHz
274.944 MHz
178.944 MHz
98.304 MHz
131.072 MHz
148.224 MHz
98.816 MHz
Frequency
T0 APLL Frequency
T4 APLL
-
-
Squelched
Normal
12E1
16E1
24DS1
16DS1
E3
DS3
T0-12E1
T0-16E1
T0-24DS1
T0-16DS1
T4 Mode
Normal (digital feedback)
Normal (analog feedback)
12E1 (digital feedback)
16E1 (digital feedback)
24DS1 (digital feedback)
16DS1 (digital feedback)
Do not use
Do not use
77.76
77.76
24.576
32.768
37.056
(2*18.528)
24.704
68.736
(2*34.368)
44.736
-
-
-
-
T4 Forward DFS
Frequency
(MHz)
T0 Mode
Control Register Bits
T4 DPLL Frequency
Reg. 64 Bits [2:0]
000
001
010
011
100
101
110
111
XXX
XXX
XXX
XXX
FINAL
Page 40
T0 DPLL Frequency Control Register Bits
Enable Register Bit
Reg. 65 Bits[2:0]
T4 APLL for T0
Reg. 65 Bit 6
000
010
011
100
101
110
111
001
0
0
0
0
0
0
0
0
1
1
1
1
T0 Frequency to T4
APLL Register Bits
Reg. 65 Bits [5:4]
ACS8520 SETS
00
01
10
11
XX
XX
XX
XX
XX
XX
XX
XX
Output Jitter Level
DATASHEET
Output Jitter Level
www.semtech.com
ns (p-p)
<0.5
<0.5
<2
<2
<2
<2
-
-
ns (p-p)
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<2
<2
<2
<2