S19252PBIDB Applied Micro Circuits Corporation, S19252PBIDB Datasheet - Page 17

• Manufacturer Part Number: S19252PBIDB
• Manufacturer: Applied Micro Circuits Corporation

Specifications of S19252PBIDB

• Lead Free Status / Rohs Status: Supplier Unconfirmed

CRU Reference Clock (REFCLKAP/N) –
External Pin
The
equivalent FEC/10 Gigabit Ethernet Rate) reference
clock (CRU REFCLKP/N) input is used to establish the
initial operating frequency of the Phase Lock Loop
(PLL). This input can also be driven by the 155MCKP/
N output from the transmit section of S19252. Table 7
summarizes the settings and increased CRU REFCLK
Table 7:
Revision 5.03
RXREF
SEL
1.
2.
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
differential
Refer to CSU and CRU VCO Specifications in Table 28 for CRU VCO frequency range selection.
All Serial Data Rates shown for divide by 64 REFCLKs could also use divide by 16 REFCLKS by setting RXREFSEL to 1.
Reference Frequency (CRU REFCLK) for the Clock and Data Recovery Unit
SONET_
RATE
SEL
1
1
1
1
0
1
1
1
0
1
1
1
1
1
1
REFCLK
GBE_
RATE
SEL
X
X
X
X
X
X
X
X
X
X
X
X
X
1
1
AppliedMicro - Confidential and Proprietary
CML
10 Gigabit Ethernet 64/66B
10 Gigabit Ethernet 64/66B
10 Gigabit Ethernet 64/66B
10 Gigabit Ethernet 64/66B
STS-192, Reed Soloman -
STS-192, Reed Soloman -
STS-192, Reed Soloman -
STS-192, Reed Soloman -
155.52 MHz
Reed Soloman- 255/238
Reed Soloman- 255/237
10 G Fibre Channel,
10 G Fibre Channel,
10 G Fibre Channel
10 G Fibre Channel
10 Gigabit Ethernet
Encoded - 255/238
Encoded - 255/237
STS-192, 0 bytes
STS-192, 0 bytes
Description
Encoded
Encoded
255/238
255/237
255/238
255/237
Mode
(or
rates required for the FEC operation. The S19252
incorporates the bandwidth expansion requirements
needed for FEC/10 GB Ethernet applications that
provide up to eight bytes of correction per 255 byte
block. Increased CRU_REFCLK frequency is required
for bandwidth expansion due to code words and Frame
Synchronization Byte (FSB). This input is internally
biased and terminated 100  line-to-line and must be
AC coupled.
66 / 3.125%
64 / 3.125%
Multiplier /
Expansion
64 / 7.14%
64 / 7.59%
64 / 7.14%
64 / 7.59%
64 / 7.14%
64 / 7.59%
16 / 7.14%
16 / 7.59%
REFCLK
64 / 0%
64 / 0%
66 / 0%
64 / 0%
16 / 0%
Rate
Serial Data
Frequency
10.51875
10.51875
(Gbps)
9.95328
9.95328
10.3125
10.3125
11.0491
11.0957
11.3176
10.664
10.709
10.000
10.664
10.709
Input
11.27
1
S19252 Data Sheet
CRU REFCLK
Frequency
Required
172.642
159.375
164.355
176.096
176.838
666.514
669.327
(MHz)
155.52
166.63
167.33
156.25
156.25
161.13
173.37
622.08
2
17