MAX3886 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – Multirate CDR with Integrated Serializer/Deserializer for GPON and BPON ONT Applications

19-3103; Rev 0; 12/07
Multirate CDR with Integrated Serializer/Deserializer
for GPON and BPON ONT Applications
General Description
The MAX3886 2.488Gbps/1.244Gbps/622Mbps CDR
with SerDes (serializer/deserializer) is designed specifi-
cally for low-cost optical network terminal (ONT) appli-
cations in Gigabit passive optical network (GPON) and
broadband passive optical network (BPON) fiber-to-
the-home (FTTH) systems. It provides G.984- and
G.983-compliant clock and data recovery (CDR) for the
continuous downstream data signal, with an integrated
4-bit SerDes that has LVDS parallel interfaces and CML
serial interfaces.
The SerDes uses the recovered downstream clock for
upstream serialization (loopback clock), providing opti-
mum PON operation. The CDR frequency reference
can be provided by a low-cost 19.44MHz SMD-type
crystal or external LVCMOS source, and excellent jitter
tolerance supports applications requiring FEC. An inte-
grated burst-enable signal path also simplifies high-
performance upstream burst timing.
This 3.3V IC is housed in a 8mm x 8mm, 56-lead thin
QFN package and operates from -40°C to +85°C.
Applications
BPON/GPON Optical Network Terminal (ONT)
Features
♦ 2.488Gbps, 1.244Gbps, and 622Mbps Clock and
Data Recovery
♦ Meets G.984 and G.983 Jitter Requirements
♦ 4-Bit Serializer and 4-Bit Deserializer with
Loop-Timed Serialization
♦ CML Serial I/O, LVDS Parallel I/O
♦ Integrated Reference Oscillator Uses 19.44MHz
SMD Crystal
♦ Integrated Upstream Burst-Enable Signal Path
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX3886ETN+ -40°C to +85°C
+Denotes a lead-free package.
56 TQFN
(8mm x 8mm)
T5688-2
Pin Configuration appears at end of data sheet.
Typical Application Circuit
+3.3V
+3.3V
0.27μF
19.4400MHz
V_CC
CFIL
V_CC
+3.3V
RFCK1
MVCO
MDDR
MSYM
1490nm
MAX3747/ _2.488G
MAX3748
LIM AMP
RFCK2
SDI
MAX3886
GPON
CDR/SERDES
PCKO
PDO[3:0]
PON
BiDi
TRIPLEXER
1310nm ^MAX3643/
MAX3656
LD DRIVER
1.244G
SDO
BENO
PDI[3:0]
PCKI
BENI
GND LOCK FRST FERR
MAC IC
PCLK (311MHz)
PDATA (622Mbps)
PDATA (311Mbps)
PCLK (311MHz)
BURST ENABLE
VOICE
SLIC
DATA
10/100
ETHERNET
1550nm
MAX3654
VIDEO TIA
GPON OPTICAL NETWORK TERMINAL (ONT)
870MHz VIDEO
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.