SY87702LHI
SY87702LHI Datasheet
SY87702L
| Part | Datasheet |
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SY87702LHI |
SY87702LHI (pdf) |
| PDF Datasheet Preview |
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| Micrel, Inc. 3.3V 28Mbps-2.5Gbps CLOCK AND DATA RECOVERY SY87702L SY87702L • 3.3V power supply • Complies with Bellcore, ITU/CCITT and ANSI specifications for applications such as OC-1, OC-3, OC-12, OC-48*, and ATM • Compatible with FDDI, Gigabit Ethernet, Fibre Channel, 2X Fibre Channel, SMPTE 259 and 292, and proprietary applications • Low power • Clock and data recovery from 28Mbps up to 2.5Gbps NRZ data stream • Selectable reference frequencies via programmable multiplier • Differential PECL and CML high-speed serial outputs • Line receiver input no external buffering needed • Link fault indication • 100K ECL compatible I/O • Available in 64-Pin EP-TQFP package • Product obsolete. Use SY87721L for new designs The SY87702L is a complete Clock Recovery and Data retiming integrated circuit for data rates from 28Mbps up to 2.5Gbps NRZ. 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. Onchip clock generation is performed through the use of a frequency multiplier PLL and can be used as a Clock Multiplier Unit CMU . The integrated CMU can provide this clock signal at the TCLK outputs. Additionally, the TCLK output can be selected to provide a copy of the RCLK frequency. For SONET/SDH applications, the SY87702L includes a Link Fault Detection circuit. This circuit, enabled by the output of an optical module driving the CD input low, causes the recovery PLL of the SY87702L to lock to the reference clock's multiplied frequency under Loss-of-Signal conditions. This low jitter clock is provided at the RCLK outputs and is at the same frequency as that provided at the TCLK output. *Meets OC-48 Jitter Tolerance and Transfer • Transponders and section repeaters • Multiplexer's access, add drop ADM , and terminal TM • SONET/SDH/ATM -based transmission systems, modules, and test equipment • Terabit routers and broadband cross-connects • Fibre optic test equipment • HDTV switching and transmission is a registered trademark of Micrel, Inc. M9999-072706 or 408 955-1690 Micrel, Inc. SY87702L PACKAGE/ORDERING INFORMATION RDIN+ LFIN NC VCCO VCC GND VCC GND CD FREQSEL3 FREQSEL2 FREQSEL1 VCOSEL2 Ordering Information 1 VCOSEL1 PLLRN+ NC PLLRW+ NC VCCA GNDA PLLSW+ NC PLLSN+ NC 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 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+ Package Operating Type Range Package Marking Lead Finish SY87702LHI SY87702LHITR 2 SY87702LHG 3 H64-1 H64-1 H64-1 SY87702LHGTR 2, 3 H64-1 Industrial Industrial SY87702LHI Sn-Pb SY87702LHI Sn-Pb SY87702LHG with NiPdAu Pb-Free bar line indicator Pb-Free SY87702LHG with NiPdAu Pb-Free bar line indicator Pb-Free Notes Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only. Tape and Reel. Pb-Free package is recommended for new designs. GND REFCLK+ VCC NC GND VCC GND CLKSEL NC DIVSEL3 DIVSEL2 DIVSEL1 NC 64-Pin EPAD TQFP H63-1 M9999-072706 or 408 955-1690 Micrel, Inc. SYSTEM BLOCK DIAGRAM Optical Module RX Data Stream TX Data Stream SY87702L CDR/CMU TXCLK SY877XXL Mux/Demux RX Data RX Clock Align Ref Sel CD Lock Carrier Detect Serial EEPROM |
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