Short Form Data Sheet April 2012 DS31406 2-Input, 14-Output, Single DPLL Timing IC with Sub-ps Output Jitter General Description Features Two Input Clocks The DS31406 is a flexible, high-performance timing IC for diverse frequency conversion and frequency Differential or CMOS/TTL Format synthesis applications. On each of its two input clocks Any Frequency from 2kHz to 750MHz and fourteen output clocks, the device can accept or Fractional Scaling for 64B/66B and FEC Scaling (e.g., 64/66, 237/255, 238/255) or Any Other generate nearly any frequency between 2kHz and Downscaling Requirement 750MHz. Continuous Input Clock Quality Monitoring The input clocks are divided down, fractionally scaled as Automatic or Manual Clock Selection needed, and continuously monitored for activity and Two 2/4/8kHz Frame Sync Inputs frequency accuracy. The best input clock is selected, High-Performance DPLL manually or automatically, as the reference clock for the Hitless Reference Switching on Loss of Input rest of the device. A flexible, high-performance digital Automatic or Manual Phase Build-Out PLL locks to the selected reference and provides Holdover on Loss of All Inputs programmable bandwidth, very high resolution holdover Programmable Bandwidth, 0.5mHz to 400Hz capability, and truly hitless switching between input Seven Digital Frequency Synthesizers clocks. The digital PLL is followed by a clock synthesis Produce Any 2kHz Multiple Up to 77.76MHz subsystem which has seven fully programmable digital Per-DFS Clock Phase Adjust frequency synthesis blocks, three high-speed low-jitter APLLs, and 14 output clocks, each with its own 32-bit Three Output APLLs divider and phase adjustment. The APLLs provide Output Frequencies to 750MHz fractional scaling and output jitter less than 1ps RMS. High Resolution Fractional Scaling for FEC and 64B/66B (e.g., 255/237, 255/238, 66/64) or Any For telecom systems, the DS31406 has all required Other Scaling Requirement features and functions to serve as a central timing Less than 1ps RMS Output Jitter function or as a line card timing IC. With a suitable Simultaneously Produce Three Low-Jitter Rates from oscillator the DS31406 meets the requirements of the Same Reference (e.g., 622.08MHz for SONET, Stratum 2, 3E, 3, 4E, and 4, G.812 Types IIV, G.813, 255/237*622.08MHz for OTU2, and 156.25MHz for and G.8262. 10GE) 14 Output Clocks in Seven Groups Applications Nearly Any Frequency from <1Hz to 750MHz Frequency Conversion Applications in a Wide Variety of Each Group Slaves to a DFS Clock, Any APLL Equipment Types Clock, or Any Input Clock (Divided and Scaled) Telecom Line Cards or Timing Cards with Any Mix of Each Has a Differential Output (3 CML, 4 LVDS/ SONET/SDH, Synchronous Ethernet and/or OTN LVPECL) and Separate CMOS/TTL Output Ports in WAN Equipment Including MSPPs, Ethernet 32-Bit Frequency Divider Per Output Switches, Routers, DSLAMs, and Base Stations Two Sync Pulse Outputs: 8kHz and 2kHz General Features Ordering Information Suitable Line Card IC or Timing Card IC for PART TEMP RANGE PIN-PACKAGE Stratum 2/3E/3/4E/4, SMC, SEC/EEC, or SSU Accepts and Produces Nearly Any Frequency Up DS31406GN+ -40 C to +85 C 256 CSBGA to 750MHz Including 1Hz, 2kHz, 8kHz, NxDS1, +Denotes a lead(Pb)-free/RoHS-compliant package. NxE1, DS2/J2, DS3, E3, 2.5M, 25M, 125M, 156.25M, and Nx19.44M Up to 622.08M SPI is a trademark of Motorola, Inc. Internal Compensation for Local Oscillator Frequency Error SPI Processor Interface 1.8V Operation with 3.3V I/O (5V Tolerant) 1 Short Form Data Sheet DS31406 Application Example clock monitoring and selection, Output clocks can be nearly any frequency from <1Hz to 725MHz. hitless switching, holdover, frequency Each output clock can be sourced from a DFS block, an APLL or conversion, fractional scaling, from an input clock (divided and scaled). Each input can be any frequency jitter attenuation Each output clock has its own 32-bit divider. from 2kHz to 725MHz OC1 OC1POS/NEG IC1 Output Clocks outputs from APLL: <1ps rms jitter, OC2 Input Clocks IC2 OC2POS/NEG outputs from DFS: ~40ps rms jitter OC3 OC3POS/NEG DS31406 OC4 OC4POS/NEG OC5 OC5POS/NEG OC6 OC6POS/NEG OC7 OC7POS/NEG 2