When paired with an external TCXO or OCXO, the
DS3100 is a complete central timing and
synchronization solution for SONET/SDH network
elements. With two multiprotocol BITS/SSU receivers
and 14 input clocks, the device directly accepts both
external timing and line timing from a large number of
line cards. All input clocks are continuously monitored
for frequency accuracy and activity. Any two of the input
clocks can be selected as the references for the two
core DPLLs. The T0 DPLL complies with the Stratum 3
and 3E requirements of GR-1244, GR-253, and the
requirements of G.812 Type III and G.813. From the
output of the core DPLLs, a wide variety of output clock
frequencies and frame pulses can be produced
simultaneously on the 11 output clock pins. Two
DS3100 devices can be configured in a master/slave
arrangement for timing card equipment protection.
The DS3100 registers and I/O pins are backward
compatible with Semtech's ACS8520 and ACS8530
timing card ICs.
Key Features
Applications/Uses
Synchronization Subsystem for Stratum 3E, 3, 4E and 4, SMC and SEC
Meets Requirements of GR-1244 Stratum 3/3E, GR-253, G.812 Types I, III and IV, and G.813
Stratum 3E Holdover Accuracy with Suitable External Oscillator
Programmable Bandwidth, 0.5mHz to 70Hz
Hitless Reference Switching on Loss of Input
Phase Build-Out and Transient Absorption
Locks to and Generates 125MHz for Gigabit Synchronous Ethernet per ITU-T G.8261
14 Input Clocks
10 CMOS/TTL Inputs Accept 2kHz, 4kHz, and Any Multiple of 8kHz Up to 125MHz
Two LVDS/LVPECL/CMOS/TTL Inputs Accept Nx8kHz Up to 125MHz Plus 155.52MHz
Two 64kHz Composite Clock Receivers
Continuous Input Clock Quality Monitoring
Separate 2/4/8kHz Frame Sync Input
11 Output Clocks
Five CMOS/TTL Outputs Drive Any Internally Produced Clock Up to 77.76MHz
Two LVDS Outputs Each Drive Any Internally Produced Clock Up to 311.04MHz
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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