Synchronous Equipment Timing Source
for 10G/40G/100G Synchronous Ethernet
82P33731
Datasheet
(SEC); and Telcordia GR-253-CORE/ GR-1244-CORE for Stratum 3
and SONET Minimum Clock (SMC)
DPLL1 generates clocks with PDH, TDM, GSM, CPRI/OBSAI, 10/100/
1000 Ethernet and GNSS frequencies; these clocks are directly avail-
able on OUT1
DPLL2 generates N x 8 kHz clocks up to 100 MHz that are output on
OUT9 and OUT10
APLL1, APLL2 and APLL3 are connected to DPLL1
APLL1 and APLL2 generate 10/100/1000 Ethernet, 10G Ethernet, or
SONET/SDH frequencies
APLL3 generates 10G/40G/100G Ethernet, WAN-PHY, and LAN-PHY
frequencies
Any of eight common TCXO/OCXO frequencies can be used for the
System Clock: 10 MHz, 12.8 MHz, 13 MHz, 19.44 MHz, 20 MHz,
24.576 MHz, 25 MHz, or 30.72 MHz
The I2C slave interface can be used by a host processor to access the
control and status registers
The I2C master interface can automatically load a device configura-
tion from an external EEPROM after reset; APLL3 must be configured
via the I2C slave interface
DPLLs can be connected to an internal composite clock generator that
outputs its 64 kHz synchronization signal on OUT8
Differential outputs OUT3 to OUT6 output clocks with frequencies
between 1 PPS and 650 MHz
Differential outputs OUT11 and OUT12 output clocks with frequencies
up to 650 MHz
Single ended outputs OUT1, OUT2 and OUT7 output clocks with fre-
quencies between 1 PPS and 125 MHz
Single ended outputs OUT9 and OUT10 output clocks N*8 kHz multi-
ples up to 100 MHz
DPLL1 supports independent programmable delays for each of IN3 to
IN14; the delay for each input is programmable in steps of 0.61 ns
with a range of ~±78 ns
The input to output phase delay of DPLL1 is programmable in steps of
0.0745 ps with a total range of ±20 s
The clock phase of each of the output dividers for OUT1 (from APLL1)
to OUT7 is individually programmable in steps of ~200 ps with a total
range of +/-180°
HIGHLIGHTS
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Synchronous Equipment Timing Source (SETS) for Synchronous
Ethernet (SyncE) per ITU-T G.8264
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DPLL1 generates ITU-T G.8262 compliant SyncE clocks, Telcordia
GR-1244-CORE/GR-253-CORE, and ITU-T G.813 compliant SONET/
SDH clocks
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DPLL2 performs rate conversions for synchronization interfaces or for
other general purpose timing applications
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APLL3 is Voltage Controlled Crystal Oscillator (VCXO) based and
generates clocks with jitter <0.3 ps RMS (10 kHz to 20 MHz) for:
10GBASE-R, 10GBASE-W, 40GBASE-R and 100GBASE-R
APLL1 and APLL2 generate clocks with jitter < 1 ps RMS (12 kHz to
20 MHz) for: 1000BASE-T and 1000BASE-X
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Fractional-N input dividers support a wide range of reference frequen-
cies
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Locks to 1 Pulse Per Second (PPS) references
DPLLs, APLL1 and APLL2 can be configured from an external
EEPROM after reset
FEATURES
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Composite clock inputs (IN1 and IN2) accept 64 kHz synchronization
interface signals per ITU-T G.703
Differential reference inputs (IN3 to IN8) accept clock frequencies
between 1 PPS and 650 MHz
Single ended inputs (IN9 to IN14) accept reference clock frequencies
between 1 PPS and 162.5 MHz
Loss of Signal (LOS) pins (LOS0 to LOS3) can be assigned to any
clock reference input
Reference monitors qualify/disqualify references depending on activ-
ity, frequency and LOS pins
Automatic reference selection state machines select the active refer-
ence for each DPLL based on the reference monitors, priority tables,
revertive and non-revertive settings and other programmable settings
Fractional-N input dividers enable the DPLLs to lock to a wide range
of reference clock frequencies including: 10/100/1000 Ethernet, 10G/
40G/100G Ethernet, OTN, SONET/SDH, PDH, TDM, GSM, CPRI,
and GNSS frequencies
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Any reference inputs (IN3 to IN14) can be designated as external sync
pulse inputs (1 PPS, 2 kHz, 4 kHz or 8 kHz) associated with a select-
able reference clock input
FRSYNC_8K_1PPS and MFRSYNC_2K_1PPS output sync pulses
that are aligned with the selected external input sync pulse input and
frequency locked to the associated reference clock input
DPLL1 can be configured with bandwidths between 0.09 mHz and
567 Hz
DPLL1 locks to input references with frequencies between 1 PPS and
650 MHz
DPLL2 locks to input references with frequencies between 8 kHz and
650 MHz
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1149.1 JTAG Boundary Scan
144-pin CABGA green package
APPLICATIONS
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Access routers, edge routers, core routers
Carrier Ethernet switches
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Multi-service access platforms
PON OLT
LTE eNodeB
ITU-T G.8264 Synchronous Equipment Timing Source (SETS)
ITU-T G.8262 Synchronous Ethernet Equipment Clock (EEC)
ITU-T G.813 Synchronous Equipment Clock (SEC)
Telcordia GR-253-CORE/GR1244-CORE Stratum 3 Clock (S3) and
SONET Minimum Clock (SMC)
DPLL1 complies with ITU-T G.8262 for Synchronous Ethernet Equip-
ment Clock (EEC), and G.813 for Synchronous Equipment Clock
©2017 Integrated Device Technology, Inc.
1
August 28, 2017
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