參數(shù)資料
型號(hào)： MAX3886ETN+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 3/17頁(yè)
文件大?。?/td> 0K
描述： IC MULTIRATE CDR SER/DES56-TQFN
標(biāo)準(zhǔn)包裝： 37
類型： 時(shí)鐘和數(shù)據(jù)恢復(fù)（CDR），多路復(fù)用器
PLL： 是
主要目的： 光纖網(wǎng)絡(luò)終端（ONT）應(yīng)用，千兆位無(wú)源光纖網(wǎng)絡(luò)（GPON），寬帶無(wú)源光纖網(wǎng)絡(luò)（BPON）
輸入： CML，LVDS，LVPECL
輸出： CML，LVDS
電路數(shù)： 1
比率 - 輸入:輸出： 7:6
差分 - 輸入:輸出： 是/是
頻率 - 最大： 622MHz，2488Mbps
電源電壓： 3 V ~ 3.6 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 56-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 56-TQFN-EP（8x8）
包裝： 管件
Burst-Enable Signal Processing
To minimize PON overhead, it is important that the laser
driver burst-enable (BEN) signal correspond accurately
with the beginning of the serial data burst. This is sup-
ported in the MAX3886 by the BENI LVDS input and
associated signal path. The LVDS burst-enable signal
from the MAC layer IC is passed through the same FIFO
as the parallel data and output on the BENO CML out-
put, which ensures that the laser driver’s burst enable
matches the beginning of the associated serial MSB. If
FRST or FERR are high, the BENO output is forced low
to prevent the laser driver from transmitting erroneous
data. The parallel data setup and hold timing require-
ments also apply to the burst-enable signal.
Lock Detector Output
The lock detector operates by comparing a divided-
down version of the VCO output to the reference clock.
The LOCK output pin indicates lock (high) when the fre-
quency difference between the reference clock and the
CDR VCO is less than 250ppm, within the “pullin” range
of the PLL. The LOCK output indicates out-of-lock (low)
when the frequency difference between the reference
clock and the CDR VCO becomes more than 500ppm.
When valid input data is present, this provides a stable
lock indication.
At power-up, the CDR takes approximately 50ms (if
valid NRZ data is present) for initial acquisition while
the internal reference oscillator, the PLL, and the fre-
quency detector reach their operating conditions.
During this startup period, the LOCK status output may
provide false indication of a lock condition. Once the
PLL and frequency detector are initialized, the nominal
time for reacquisition of an NRZ input is 2ms.
When valid NRZ input data is not present, the lock
detector may produce a chattering LOCK indicator out-
put while the PLL searches for the input frequency. If
needed, an external digital filter can be used to mask
this chattering.
Table 1. Lock Detector Output
Control Input Summary
Table 2 summarizes the clock and data rates as con-
trolled by MVCO, MSYM, and MDDR.
MAX3886
Multirate CDR with Integrated Serializer/Deserializer
for GPON and BPON ONT Applications
______________________________________________________________________________________
11
CDR INPUT
LOCK OUTPUT
Valid NRZ data
1
No CDR input
0/1 (chatter)
Table 2. Clock and Data Rate Controls
Rx
Tx
MVCO
MSYM
MDDR
SDI RATE
(Mbps)
PDO RATE
(Mbps)
PCKO
(MHz)
SDO RATE
(Mbps)
PDI RATE
(Mbps)
PCKI
(MHz)
RCKO
(MHz)
0
622
155
39
0
1
622
155
78
155
39
0
1
0
622
155
622
155
0
1
622
155
78
622
155
Open
0
1244
311
622
155
Open
0
1
1244
311
155
622
155
Open
1
0
1244
311
1244
311
Open
1
1244
311
155
1244
311
1
0
2488
622
1244
311
1
0
1
2488
622
311
1244
311
1
0
2488
622
2488
622
1
2488
622
311
2488
622
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX3886ETN+ 功能描述:串行器/解串器 - Serdes CDR w/Integrated Serial/Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64
MAX3886ETN+T 功能描述:串行器/解串器 - Serdes CDR w/Integrated Serial/Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64
MAX388C/D 功能描述:多路器開關(guān) IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
MAX388CJN 功能描述:多路器開關(guān) IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
MAX388CPN 功能描述:多路器開關(guān) IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
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