SY87721LHG
SY87721LHG Datasheet
SY87721L
| Part | Datasheet |
|---|---|
SY87721LHG |
SY87721LHG (pdf) |
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| Micrel, Inc. 3.3V 28Mbps-2.7Gbps CLOCK AND DATA RECOVERY WITH INTEGRATED CLOCK MULTIPLIER UNIT SY87721L SY87721L s Recovers any data and clock from 28Mbps to 2.7Gbps • OC-1, OC-3, OC-12, OC-48, ATM • Gigabit Ethernet, Fast Ethernet • Fibre Channel, 2x Fibre Channel • P1394, Infiniband • SMPTE-259, SMPTE-292 • Proprietary optical transport s Integrated clock multiplier unit with low jitter generation s Complies with Bellcore, ITU/CCITT and ANSI specifications s Selectable mux for pass through avoids jitter accumulation when switching through backplanes s Available in 64-Pin EPAD-TQFP package The SY87721L is a complete Clock Recovery and Data retiming integrated circuit for data rates from 28Mbps up to 2.7Gbps NRZ including SONET FEC data rates. Included in the device, is a fully integrated Clock Multiplier Unit CMU that is capable of generating frequencies that cover the same data rate range as the CDR. The device is ideally suited for SONET/SDH/ATM, Fibre Channel, and Gigabit Ethernet applications, as well as other high-speed data transmission applications. Clock recovery and data retiming is performed by synchronizing the on-chip VCO directly to the incoming data stream. The VCO center frequency is controlled by the reference clock frequency and the selected divide ratio. On-chip clock generation is performed through the use of a frequency multiplier PLL with a byte rate or code group rate source as reference. SIMPLIFIED BLOCK DIAGRAM AnyRate Data In SY87721L CDR Reference Clock AnyRate Data Out 2 Recovered Clock 2 Transmit Clock s SONET/SDH/ATM-based transmission systems, modules, and test equipment s Transponders and section repeaters s Multiplexers access, add drop ADM , and terminal TM s Terabit routers and broadband cross-connects s Fiber optic test equipment AnyRate is a registered trademark of Micrel, Inc. M9999-102405 or 408 955-1690 Micrel, Inc. SY87721L PACKAGE/ORDERING INFORMATION RDIN+ LFIN BRD+ VCCO VCC BRDMX GND VCC GND CD FREQSEL3 FREQSEL2 FREQSEL1 VCOSEL2 Ordering Information 1 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 VCOSEL1 1 PLLRN+ 2 3 NC 4 PLLRW+ 5 6 NC 7 VCCA 8 GNDA 9 10 PLLSW+ 11 NC 12 13 PLLSN+ 14 NC 15 NC 16 64-Pin EPAD-TQFP 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 GND ENPECL RDOUTE+ RDOUTC+ VCCO RCLKE+ RCLKC+ VCCO TCLKE+ TCLKC+ Part Number SY87721LHI SY87721LHITR 2 SY87721LHG 3 SY87721LHG 2, 3 Package Type H64-1 H64-1 H64-1 H64-1 Operating Range Industrial Industrial Package Marking SY87721LHI Lead Finish Sn-Pb SY87721LHI Sn-Pb SY87721LHG with Pb-Free Pb-Free bar-line indicator NiPdAu SY87721LHG with Pb-Free Pb-Free bar-line indicator NiPdAu Notes Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only. Tape and Reel. Recommended for new designs. NC DIVSEL1 DIVSEL2 DIVSEL3 ALRSEL CLKSEL GND VCC GND VCC REFCLK+ GND M9999-102405 or 408 955-1690 Micrel, Inc. SYSTEM BLOCK DIAGRAM SY87721L FIBER PIN DIODE FIBER LASER DIODE 27MHz SY889x2 LASER DIODE DRIVER SY889x3 POST AMP SY87721L RDATA RCLK LOCK SY87729L AnyClock Fractional Synthesizer REF_CLK TCLK |
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