MAX3634 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 622Mbps/1244Mbps Burst-Mode Clock Phase Aligner for GPON OLT Applications

19-3818; Rev 0; 9/05
622Mbps/1244Mbps Burst-Mode Clock Phase
Aligner for GPON OLT Applications
General Description
The MAX3634 burst-mode clock phase aligner (CPA) is
designed specifically for 622Mbps or 1244Mbps GPON
(ITU G.984) optical line terminal (OLT) receiver applica-
tions. The MAX3634 provides clock and clock-aligned
resynchronized upstream data through differential
LVPECL outputs. Using the OLT system clock as a ref-
erence, the MAX3634 aligns to the input data and
acquires within the first 13 bits of the burst. The CPA
operates with received data that is frequency locked to
the OLT reference. The acquisition time, bit-error ratio,
and jitter tolerance all support GPON PMD specifica-
tions. LVPECL high-speed clock and data outputs pro-
vide compatibility with FPGAs at 622Mbps and with the
MAX3885 deserializer at 1244Mbps.
The MAX3634 is available in a low-profile, 7mm x 7mm,
48-lead TQFN package. The MAX3634 operates from a
single +3.3V supply, over the -40°C to +85°C tempera-
ture range.
Applications
622Mbps GPON OLT Receivers
1244Mbps GPON OLT Receivers
Features
♦ DC-Coupled Clock Phase Aligner for Burst-Mode
GPON Applications
♦ 13-Bit Burst Acquisition Time
♦ 0.85UI High-Frequency Jitter Tolerance
♦ Continuous Clock Output
♦ Byte Rate (1/8th Data Rate) Reference Clock Input
♦ Lock Detect Output
♦ LVPECL Serial Data Input and Output
♦ LVPECL Reset Input
Ordering Information
PART
MAX3634ETM
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
48 TQFN
(7mm x 7mm)
PKG
CODE
T4877-6
Pin Configuration appears at end of data sheet.
Typical Application Circuit
BURST RESET
DATA
CLOCK
MAX3634
BURST-MODE
CLOCK PHASE
ALIGNER
BURST-MODE
TIA/LA
UPSTREAM
1244Mbps
DIVIDE BY 8 RATESEL
OLT CLOCK
DATA
MAX3738
CONTINUOUS
LASER DRIVER
GPON OPTICAL LINE TERMINATION
DOWNSTREAM
2488Mbps
BURST ENABLE
MAX3656
BURST-MODE
LASER DRIVER
MAX3892
DATA
SERIALIZER
4
DATA
CLOCK
DIVIDE BY 16
MAX3864
MAX3748A
TIA/LA
MAX3872
SONET
CDR
CLOCK
DATA
GPON OPTICAL NETWORK TERMINATION
________________________________________________________________ Maxim Integrated Products 1
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