SY87700AL Low-Power, 3.3V, 32Mbps to 208Mbps AnyRate® Clock and Data Recovery General Description The SY87700AL is a complete clock recovery and data retiming integrated circuit for data rates from 32Mbps up to 208Mbps 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 SY87700AL also includes a link fault detection circuit. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. AnyRate® Features • 3.3V power supply • SONET/SDH/ATM compatible • Clock and data recovery from 32Mbps up to 208Mbps NRZ data stream; clock generation from 32Mbps to 208Mbps • 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 • Industrial temperature range (–40°C to +85°C) • Low power: fully compatible with Micrel’s SY87700V, but with 30% less power • Available in 32-pin EPAD-TQFP and 28-pin EPAD SOIC packages, (28-pin SOIC is available, but NOT recommended for new designs.) Applications • SONET/SDH/ATM OC-1 and OC-3 • Fast Ethernet, SMPTE 259 • Proprietary architecture up to 208Mbps AnyRate is a registered trademark of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com August 2009 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Ordering Information(1) Package Type Operating Range Package Marking Lead Finish SY87700ALZG(2) Z28-1 Industrial SY87700ALZG with Pb-Free bar-line indicator NiPdAu Pb-Free SY87700ALHG(2) H32-1 Industrial SY87700ALHG with Pb-Free bar-line indicator NiPdAu Pb-Free Part Number Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only. 2. Pb-Free package is recommended for new designs. Pin Configuration 32-Pin EPAD-TQFP (H32-1) 28-Pin SOIC (Z28-1) August 2009 2 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Pin Description Inputs Pin Number (28-SOIC) Pin Number (32-TQFP) Pin Name 4, 5 2, 3 RDINP, RDINN Serial Data Input. Differential PECL: These built-in line receiver inputs are connected to the differential receive serial data stream. An internal receive PLL recovers the embedded clock (RCLK) and data (RDOUT) information. The incoming data rate can be within one of eight frequency ranges depending on the state of the FREQSEL pins. See “Frequency Selection” Table. 7 5 REFCLK Reference Clock. TTL Input: This input is used as the reference for the internal frequency synthesizer and the “training” frequency for the receiver PLL to keep it centered in the absence of data coming in on the RDIN inputs 27 26 CD 6 8 9 4 6 7 FREQSEL1 FREQSEL2 FREQSEL3 Frequency Select. TTL Inputs: These inputs select the output clock frequency range as shown in the “Frequency Selection” Table. 3 26 32 25 DIVSEL1 DIVSEL2 Divider Select. TTL Inputs: These inputs select the ratio between the output clock frequency (RCLK/TCLK) and the REFCLK input frequency as shown in the “Reference Frequency Selection” Table. 17 16 CLKSEL Clock Select. TTL Input: This input is used to select either the recovered clock of the receiver PLL (CLKSEL = HIGH) or the clock of the frequency synthesizer (CLKSEL = LOW) to the TCLK outputs. 2 31 LFIN Link Fault Indicator. TTL Output: This output indicates the status of the input data stream RDIN. Active HIGH signal is indicating when the internal clock recovery PLL has locked onto the incoming data stream. LFIN will go HIGH if CD is HIGH and RDIN is within the frequency range of the Receive PLL (1000ppm). LFIN is an asynchronous output. 25 24 24 23 RDOUTP RDOUTN Receive Data Output. Differential PECL: These ECL 100k outputs represent the recovered data from the input data stream (RDIN). This recovered data is specified against the rising edge of RCLK. 22, 21 21, 20 RCLKP, RCLKN Clock Output. Differential PECL: These ECL 100k outputs represent the recovered clock used to sample the recovered data (RDOUT). 19, 18 18, 17 TCLKP, TCLKN Clock Output. Differential PECL: These ECL 100k outputs represent either the recovered clock (CLKSEL = HIGH) used to sample the recovered data (RDOUT) or the transmit clock of the frequency synthesizer (CLKSEL = LOW). 11, 12 9, 10 PLLSP, PLLSN Clock Synthesis PLL Loop Filter: External loop filter pins for the clock synthesis PLL. 16, 15 15, 14 PLLRP, PLLRN Clock Recovery PLL Loop Filter: External loop filter pins for the receiver PLL. Pin Name Carrier Detect. PECL Input: This input controls the recovery function of the Receive PLL and can be driven by the carrier detect output of optical modules or from external transition detection circuitry. When this input is HIGH the input data stream (RDIN) is recovered normally by the Receive PLL. When this input is LOW the data on the inputs RDIN will be internally forced to a constant LOW, the data outputs RDOUT will remain LOW, the Link Fault Indicator output LFIN forced LOW and the clock recovery PLL forced to lock onto the clock frequency generated from REFCLK. Outputs August 2009 3 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Power and Ground Pin Number (28-SOIC) Pin Number (32-TQFP) Pin Name 28 27, 28 VCC 1 29, 30 VCCA Analog Supply Voltage(1) 20, 23 19, 22 VCCO Output Supply Voltage(1) 13, 14 12, 13 GND 10 1, 8 NC 11 GNDA Pin Name Supply Voltage(1) Ground. No connect. Analog Ground. Note: 1. VCC, VCCA, VCCO must be the same value. August 2009 4 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VCC) ................................... -0.5V to +4.0V Input Voltage (VIN) ........................................... -0.5V to VCC Output Current (IOUT) Continuous........................................................ ±50mA Surge .............................................................. ±100mA Lead Temperature (soldering, 20sec.) ................... +260°C Storage Temperature (Ts) ........................-65°C to +150°C Input Voltage (VCC)............................. -3.15V to +3.45V Ambient Temperature (TA) ................... –40°C to +85°C Junction Thermal Resistance(3) SOIC (θJA)(4) ................................................. 80°C/W EPAD-SOIC (θJA)(5) .................................... 27.3°C/W EPAD-TQFP (θJA)(5) 0lfpm airflow........................................ 27.6°C/W 200lfpm airflow.................................... 22.6°C/W 500lfpm airflow.................................... 20.7°C/W DC Electrical Characteristics Symbol Parameter VCC Power Supply Voltage ICC Power Supply Current Condition Min 3.15 Typ Max Units 3.3 3.45 V 120 160 mA PECL 100K DC Electrical Characteristics VCC = VCCO = VCCA = 3.3V ±5%; TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter Max Units VIH Input HIGH Voltage Condition VCC-1.165 Min Typ VCC-0.880 V VIL Input LOW Voltage VCC-1.810 VCC-1.475 V VOH Output HIGH Voltage 50Ω to VCC-2V VCC-1.075 VCC-0.830 V VOL Output LOW Voltage 50Ω to VCC-2V VCC-1.860 VCC-1.570 IIL Input LOW Current VIN = VIL (Min) 0.5 V µA TTL DC Electrical Characteristics VCC = VCCO = VCCA = 3.3V ±5%; TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VOH Output HIGH Voltage Condition Min 2.0 IOH = -0.4mA Typ Max Units VCC V 0.8 V 2.0 VOL Output LOW Voltage IOL = 4mA IIH Input HIGH Current VIN = 2.7V, VCC = Max. VIN = VCC, VCC = Max. -175 IIL Input LOW Current VIN = 0.5V, VCC = Max. -300 IOS Output Short-Circuit Current VOUT = 0V, (Max., 1 sec.) -15 V 0.5 V +100 µA µA -100 mA µA Notes: 1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. Airflow of 500lfpm recommended for 28-pin SOIC. 4. 28-pin SOIC package is NOT recommended for new designs. 5. Using JEDEC standard test boards with die attach pad soldered to PCB. See www.amkor.com for additional package details. August 2009 5 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL AC Electrical Characteristics VCC = VCCO = VCCA = 3.3V ±5%; TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter Condition Min fVCO VCO Center Frequency fREFCLK x Byte Rate 750 Typ Max Units 1250 MHz ΔfVCO VCO Center Frequency Tolerance Nominal tACQ Acquisition Lock Time 50Ω to VCC-2V tCPWH REFCLK Pulse Width HIGH 50Ω to VCC-2V 4 ns tCPWL REFCLK Pulse Width LOW VIN = VIL (Min) 4 ns tir REFCLK Input Rise Time tODC Output Duty Cycle (RCLK/TCLK) tr, tf ECL Output Rise/Fall Time (20% to 80%) tSKEW Recovered Clock Skew tDV Data Valid 1/(2xfRCLK) -200 ps tDH Data Hold 1/(2xfRCLK) -200 ps 5 % 15 0.5 50Ω to VCC-2 µs 2 ns 45 55 % of UI 100 400 ps -200 +200 ps Timing Waveforms August 2009 6 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Functional Block The loop filter transfer function is optimized to enable the PLL to track the jitter, yet tolerate the minimum transition density expected in a received SONET data signal. This transfer function yields a 30µs data stream of continuous 1's or 0's for random incoming NRZ data. Functional Description Clock Recovery Clock recovery, as shown in the block diagram, generates a clock that is at the same frequency as the incoming data bit rate at the serial data input. The clock is phase aligned by a PLL so that it samples the data in the center of the data eye pattern. The phase relationship between the edge transitions of the data and those of the generated clock are compared by a phase/frequency detector. Output pulses from the detector indicate the required direction of phase correction. These pulses are smoothed by an integral loop filter. The output of the loop filter controls the frequency of the Voltage Controlled Oscillator (VCO), which generates the recovered clock. Frequency stability, without incoming data, is guaranteed by an alternate reference input (REFCLK) that the PLL locks onto when data is lost. If the frequency of the incoming signal varies by greater than approximately 1000ppm with respect to the synthesizer frequency, the PLL will be declared out of lock, and the PLL will lock to the reference clock. August 2009 Lock Detect The SY87700AL contains a link fault indication circuit, which monitors the integrity of the serial data inputs. If the received serial data fails the frequency test, then the PLL will be forced to lock to the local reference clock. This will maintain the correct frequency of the recovered clock output under loss of signal or loss of lock conditions. If the recovered clock frequency deviates from the local reference clock frequency by more than approximately 1000ppm, the PLL will be declared out of lock. The lock detect circuit will poll the input data stream in an attempt to reacquire lock to data. If the recovered clock frequency is determined to be within approximately 1000ppm, the PLL will be declared in lock and the lock detect output will go active. During the interval when the CDR is not locked onto the RDIN input, the LFIN output will not be a static LOW, but will be changing. 7 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL . Frequency Selection Table FREQSEL1 FREQSEL2 FREQSEL3 fVCO/fRCLK fRCLK Data Rates (Mbps) 0 1 1 6 125 to 208 1 0 0 8 94 to 156 1 0 1 12 63 to 104 1 1 0 16 47 to 78 1 1 1 24 32 to 52 0 1 0 — undefined 0 (2) — undefined 0 X Notes: 1. SY87700AL operates from 32MHz to 208MHz. For higher speed applications, the SY87701AL operates from 28MHz to 1300MHz. 2. X is a DON’T CARE. Reference Frequency Selection DIVSEL1 DIVSEL2 fRCLK/fREFCLK 0 0 8 0 1 10 1 0 16 1 1 20 Loop Filter Components(1) R5 = 350Ω C3 = 1.0µF (X7R Dielectric) R5 = 680Ω C3 = 1.0µF (X7R Dielectric) Note: 1. Suggested values. Values may vary for different applications. August 2009 8 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Application Example AC-Coupled I/O August 2009 9 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Application Example DC-Coupled I/O Related Product and Support Documentation Part Number Function Data Sheet Link SY87701AL Low-Power 3.3V, 28Mbps to 1300Mbps AnyRate® Clock and Data Recovery www.micrel.com/product-info/products/sy87701al.shtml HBW Solutions New Products and Applications www.micrel.com/product-info/products/solutions.shtml August 2009 10 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Bill of Materials (AC-Coupled) Item C6 Part Number 293D685X0025B2T Manufacturer Description Qty. (1) 6.8µF, 25V, Tantalum Capacitor, Size B (1) Vishay 1 C7 VJ206Y103JXJAT Vishay 0.01µF Ceramic Capacitor, Size 1206, X7R Dielectric 1 C10, C11 VJ0603Y105JXJAT Vishay(1) 1.0µF Ceramic Capacitor, Size 0603, X7R Dielectric 2 C12-C15, C18, C19, C27, C28 VJ0402Y104JXJAT Vishay(1) 0.1µF Ceramic Capacitor, Size 0402, X7R Dielectric 8 C20-C26 VJ0402Y104JXJAT Vishay(1) 0.01µF Ceramic Capacitor, Size 1206, X7R Dielectric 7 D1 P301-ND D2 P300-ND/P301-ND J2, J3, J4, J6 111-0702-001 Johnson Components(3) J5 BLM21A102F Murata(4) Q1 459-2598-5-ND R1 CRCW04023500F Vishay(1) CRCW04026800F R2 Panasonic (2) LED Diode, T-1 3/4, Red Clear 1 T-1 3/4, Red LED 1 Red, Insulated Thumb Nut Binding Post (Jumped Together) 4 Black, Insulated Thumb Nut Binding Post, GND (Jumped to VEE) 1 2N2222A Buffer/Driver Transistor, NPN 1 350Ω Resistor, 2%, Size 0402 1 (1) 680Ω Resistor, 2%, Size 0402 1 (1) Vishay(1) NTE(5) Vishay R3–R10 CRCW04021001F Vishay 1kΩ Pull-up Resistor, 2%, Size 1206 8 R11-R16, R28-R30, R32 CRCW04021820F Vishay(1) 182Ω Resistor, 2%, Size 0402 10 R21 CRCW06031300F Vishay(1) 130Ω Resistor, 2%, Size 0603 1 CRCW04021820F (1) 12.1kΩ Resistor, 2%, Size 1206 1 (1) R22 Vishay R23, R24 CRCW04022825F Vishay 82Ω Resistor, 2%, Size 0402 2 R25, R26 CRCW04021300F Vishay(1) 130Ω Resistor, 2%, Size 0402 2 (1) 0Ω Resistor, 2%, Size 0402 1 (1) 50Ω Resistor, 2%, Size 0402 1 End Launch SMA Jack 10 Solder Jump Option 6 R27 CRCW0402OOR0F R31 CRCW04025000F SMA1SMA10 142-0701-851 Vishay Vishay Johnson Components(3) SP1-SP6 (6) SW1 CT2068-ND 8-Position, Top Actuated Slide Dip Switch 1 U1 SY87700AL Micrel, Inc.(7) CTS Low-Power 3.3V 28Mbps to 216Mbps AnyRate® Clock and Data Recovery 1 U2 SY89322V Micrel, Inc.(7) 3.3/5V Dual LVTTL/LVCMOS-to-Differential LVPECL Translator 1 Notes: 1. Vishay: www.vishay.com. 2. Panasonic: www.panasonic.com. 3. Johnson Components: www.johnson-components.com. 4. Murata: www.murata.com. 5. NTE: www.nte.com. 6. CTS: www.cts.com. 7. Micrel, Inc: www.micrel.com. August 2009 11 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Bill of Materials (DC-Coupled) Item C6 Part Number 293D685X0025B2T Manufacturer Description Qty. (1) 6.8µF, 25V, Tantalum Capacitor, Size B (1) Vishay 1 C7 VJ206Y103JXJAT Vishay 0.01µF Ceramic Capacitor, Size 1206, X7R Dielectric 1 C10, C11 VJ0603Y105JXJAT Vishay(1) 1.0µF Ceramic Capacitor, Size 0603, X7R Dielectric 2 C12-C15, C18, C19, C27, C28 VJ0402Y104JXJAT Vishay(1) 0.1µF Ceramic Capacitor, Size 0402, X7R Dielectric 8 C20-C26 VJ0402Y104JXJAT Vishay(1) 0.01µF Ceramic Capacitor, Size 1206, X7R Dielectric 7 D1 P301-ND D2 P300-ND/P301-ND J2, J3, J4, J6 111-0702-001 J5 BLM21A102F Q1 459-2598-5-ND R1 CRCW04023500F Vishay(1) CRCW04026800F R2 Panasonic (2) LED Diode, T-1 3/4, Red Clear 1 T-1 3/4, Red LED 1 Johnson Components(3) Red, Insulated Thumb Nut Binding Post (Jumped Together) 4 Johnson Components(3) Black, Insulated Thumb Nut Binding Post, GND (Jumped to VEE) 1 2N2222A Buffer/Driver Transistor, NPN 1 350Ω Resistor, 2%, Size 0402 1 (1) 680Ω Resistor, 2%, Size 0402 1 (1) Vishay(1) NTE(5) Vishay R3–R10 CRCW04021001F Vishay 1kΩ Pull-up Resistor, 2%, Size 1206 8 R15, R16, R30, R32 CRCW04021820F Vishay(1) 182Ω Resistor, 2%, Size 0402 10 R21 CRCW06031300F Vishay(1) 130Ω Resistor, 2%, Size 0603 1 R22 CRCW04021820F Vishay(1) 12.1kΩ Resistor, 2%, Size 1206 1 CRCW04022825F (1) 82Ω Resistor, 2%, Size 0402 2 (1) 0Ω Resistor, 2%, Size 0402 1 R23, R24 R27 CRCW0402OOR0F R31 CRCW04025000F SMA1SMA10 142-0701-851 Vishay Vishay (1) Vishay Johnson Components(3) SP1-SP6 50Ω Resistor, 2%, Size 0402 1 End Launch SMA Jack 10 Solder Jump Option 6 8-Position, Top Actuated Slide Dip Switch 1 Micrel, Inc.(7) Low-Power 3.3V 28Mbps to 216Mbps AnyRate® Clock and Data Recovery 1 Micrel, Inc.(7) 3.3/5V Dual LVTTL/LVCMOS-to-Differential LVPECL Translator 1 SW1 CT2068-ND CTS(6) U1 SY87700AL U2 SY89322V Notes: 5. Vishay: www.vishay.com. 6. Panasonic: www.panasonic.com. 7. Johnson Components: www.johnson-components.com. 8. Murata: www.murata.com. 5. NTE: www.nte.com. 6. CTS: www.cts.com. 7. Micrel, Inc: www.micrel.com. August 2009 12 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. Appendix A SY87700AL 6. Layout and General Suggestions 1. 2. 3. 4. 5. Establish controlled impedance stripline, microstrip, or coplanar construction techniques. Signal paths should have approximately the same width as the device pads. All differential paths are critical timing paths, where skew should be matched to within ±10ps. Signal trace impedance should not vary more than ±5%. If in doubt, perform TDR analysis of all high-speed signal traces. Maintain compact filter networks as close to filter pins as possible. Provide ground plane relief under filter path to reduce stray capacitance. Be careful of crosstalk coupling into the filter network. August 2009 7. 8. 13 Maintain low jitter on the REFCLK input. Isolate the XTAL oscillator from power supply noise by adequately decoupling. Keep XTAL oscillator close to device, and minimize capacitive coupling from adjacent signals. Higher speed operation may require use of fundamental-tone (third-overtone typically has more jitter) crystal-based oscillator for optimum performance. Evaluate and compare candidates by measuring TXCLK jitter. All unused outputs must be terminated. To conserve power, unused PECL outputs can be terminated with a 1kΩ resistor to VEE. M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL Package Information 28-Pin SOIC .300” Wide (Z28-1) Note: 1. The 28-pin SOIC package is NOT recommended for new designs. August 2009 14 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL 32-Pin EPAD-TQFP (H32-1) (Die Up) August 2009 15 M9999-082009-D [email protected] or (408) 955-1690 Micrel, Inc. SY87700AL PCB Thermal Consideration for 32-Pin EPAD-TQFP Package Notes: 1. Package meets Leve 2 moisture sensitivity classification and is shipped in dry-pack form. 2. Exposed pad must be soldered to a ground for proper thermal management. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2006 Micrel, Incorporated. August 2009 16 M9999-082009-D [email protected] or (408) 955-1690