Synchronization Management Unit for
IEEE 1588 and Synchronous Ethernet
82P33814
Short Form Datasheet
This is a short form datasheet and is intended to provide an overview only. Additional details are available from IDT. Contact information may be found on
the last page.
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DPLL3 locks to input references with frequencies between 8 kHz and
650 MHz
DPLL1 and DPLL2 comply with ITU-T G.8262 for Synchronous
Ethernet Equipment Clock (EEC), and G.813 for Synchronous Equip-
ment Clock (SEC); and Telcordia GR-253-CORE for Stratum 3 and
SONET Minimum Clock (SMC)
DPLL1 and DPLL2 generate clocks with PDH, TDM, GSM, CPRI/
OBSAI, 10/100/1000 Ethernet and GNSS frequencies; these clocks
are directly available on OUT1 and OUT8
DPLL1 and DPLL2 can be configured as DCOs to synthesize IEEE
1588 clocks
DPLL3 generates N x 8 kHz clocks up to 100 MHz that are output on
OUT9 and OUT10
APLL1 and APLL2 can be connected to DPLL1 or DPLL2
APLL1 and APLL2 generate 10/100/1000 Ethernet, 10G Ethernet, or
SONET/SDH 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, SPI or the UART interface can be used by a host pro-
cessor to access the control and status registers
The I2C master interface can automatically load a device configura-
tion from an external EEPROM after reset
Differential outputs OUT3 to OUT6 output clocks with frequencies
between 1 PPS and 650 MHz
Single ended outputs OUT1, OUT2, OUT7 and OUT8 output clocks
with frequencies between 1 PPS and 125 MHz
Single ended outputs OUT9 and OUT10 output clocks N*8kHz multi-
ples up to 100 MHz
DPLL1 and DPLL2 support independent programmable delays for
each of IN1 to IN6; 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 and DPLL2 is programma-
ble in steps of 0.0745 ps with a total range of ±20 μs
The clock phase of each of the output dividers for OUT1 (from
APLL1) to OUT8 is individually programmable in steps of ~200 ps
with a total range of +/-180°
HIGHLIGHTS
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Synchronization Management Unit (SMU) provides tools to manage
physical layer and packet based synchronous clocks for IEEE 1588 /
PTP Telecom Profile applications
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Supports independent IEEE 1588 and Synchronous Ethernet
(SyncE) timing paths
Combo mode provides SyncE physical layer frequency support for
IEEE 1588 Telecom Boundary Clocks (T-BC) and Telecom Time
Slave Clocks (T-TSC) per G.8273.2
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Digital PLL 1 (DPLL1) and DPLL 2 can be configured as Digitally
Controlled Oscillators (DCOs) for PTP clock synthesis
DCO frequency resolution is [(77760 / 1638400) * 2^-48] or
~1.686305041e-10 ppm
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DPLL1 and DPLL2 generate G.8262 compliant SyncE clocks
Two independent Time of Day (ToD) counters/time accumulators, one
associated with each of DPLL1 and DPLL2, can be used to track dif-
ferences between the two time domains and to time-stamp external
events
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DPLL3 performs rate conversions to frequency synchronization inter-
faces or for other general purpose timing applications
APLL1 and APLL2 generate clocks with jitter < 1 ps RMS (12 kHz to
20 MHz) for: 1000BASE-T and 1000BASE-X
Fractional-N input dividers support a wide range of reference fre-
quencies
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Locks to 1 Pulse Per Second (PPS) references
It can be configured from an external EEPROM after reset
FEATURES
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Differential reference inputs (IN1 to IN4) accept clock frequencies
between 1 PPS and 650 MHz
Single ended inputs (IN5 to IN6) 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
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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
Ethernet, OTN, SONET/SDH, PDH, TDM, GSM, CPRI and GNSS
frequencies
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1149.1 JTAG Boundary Scan
72-pin QFN green package
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APPLICATIONS
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Access routers, edge routers, core routers
Carrier Ethernet switches
Multiservice access platforms
PON OLT
LTE eNodeB
IEEE 1588 / PTP Telecom Profile clock synthesizer
ITU-T G.8273.2 Telecom Boundary Clock (T-BC) and Telecom Time
Slave Clock (T-TSC)
ITU-T G.8264 Synchronous Equipment Timing Source (SETS)
ITU-T G.8263 Packet-based Equipment Clock (PEC)
ITU-T G.8262 Synchronous Ethernet Equipment Clock (EEC)
ITU-T G.813 Synchronous Equipment Clock (SEC)
Telcordia GR-253-CORE Stratum 3 Clock (S3) and SONET Minimum
Clock (SMC)
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Any reference input (IN1 to IN6) 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 and DPLL2 can be configured with bandwidths between 0.09
mHz and 567 Hz
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DPLL1 and DPLL2 lock to input references with frequencies between
1 PPS and 650 MHz
©2016 Integrated Device Technology, Inc.
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Revision 6, March 24, 2016
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