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SY87700VZHTR Datasheet(PDF) 1 Page - Micrel Semiconductor |
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SY87700VZHTR Datasheet(HTML) 1 Page - Micrel Semiconductor |
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1 / 15 page  SY87700V 1 Micrel, Inc. M9999-111406 hbwhelp@micrel.com or (408) 955-1690 Rev.: J Amendment: /0 Issue Date: November 2006 FEATURES SY87700V ■ 3.3V and 5V power supply options ■ SONET/SDH/ATM compatible ■ Clock and data recovery from 32Mbps up to 175Mbps NRZ data stream, clock generation from 32Mbps to 175Mbps ■ Two on-chip PLLs: one for clock generation and another for clock recovery ■ Selectable reference frequencies ■ Differential PECL high-speed serial I/O ■ Line receiver input: no external buffering needed ■ Link Fault indication ■ 100K ECL compatible I/O ■ Complies with Bellcore, ITU/CCITT and ANSI specifications such as OC-1, OC-3, FDDI, Fast Ethernet, as well as proprietary applications ■ Available in 32-pin EPAD-TQFP and 28-pin SOIC packages (28-pin SOIC is available, but not recommended for new designs) The SY87700V is a complete Clock Recovery and Data Retiming integrated circuit for data rates from 32Mbps up to 175Mbps NRZ. The device is ideally suited for SONET/SDH/ATM applications and other high-speed data transmission systems. 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 source as reference. The SY87700V also includes a link fault detection circuit. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. 5V/3.3V 32-175Mbps AnyRate® CLOCK AND DATA RECOVERY APPLICATIONS ■ SONET/SDH/ATM OC-1/OC-3 ■ Fast Ethernet ■ Proprietary architectures up to 175Mbps BLOCK DIAGRAM PHASE DETECTOR PHASE/ FREQUENCY DETECTOR CHARGE PUMP VCO CHARGE PUMP VCO LINK FAULT DETECTOR DIVIDER BY 8, 10, 16, 20 REFCLK CD RDINN RDINP PLLR P/N CLKSEL RDOUTP RCLKP RCLKN RDOUTN LFIN FREQSEL 1/2/3 PLLS P/N DIVSEL 1/2 SY87700V TCLKP TCLKN VCC VCCA VCCO GND 1 0 (PECL) (PECL) (TTL) (TTL) (PECL) (TTL) (PECL) (PECL) (TTL) (TTL) 0 1 PHASE/ FREQUENCY DETECTOR AnyRate is a registered trademark of Micrel, Inc. DESCRIPTION AnyRate® |
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