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sy69753al 3.3v, 125mbps, 155mbps clock and data recovery micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? te l +1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micre l.com august 2007 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 general description the sy69753al is a complete clock recovery and data retiming integrated circuit for oc-3/sts-3 applications at 155mbps 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 genera tion is performed through the use of a frequency multiplier pll with a byte rate source as reference. the sy69753al also includes a link fault detection circuit. datasheets and support documentation can be found on micrel?s web site at: www.micrel.com . features ? 3.3v power supply ? sonet/sdh/atm compatible ? clock and data recovery for 125mbps/155mbps nrz data stream ? 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 (?40c to +85c) ? lower power: fully compatible with micrel?s sy87701v, but with 30% less power ? available in 32-pin epad-tqfp applications ? ethernet media converter(m) ? sonet/sdh/atm oc-3 ? proprietary architecture at 120mbps to 180mbps
micrel, inc. sy69753al august 2007 2 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 ordering information (1) part number package type operating range package marking lead finish sy69753alhg h32-1 industrial sy69753alhg with pb-free bar-line indicator nipdau pb-free sy69753alhgtr (2) h32-1 industrial sy69753alhg with pb-free bar-line indicator nipdau pb-free notes: 1. contact factory for die availability. dice are guaranteed at t a = 25c, dc electricals only. 2. tape and reel. pin configuration 32-pin epad-tqfp (h32-1)
micrel, inc. sy69753al august 2007 3 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 pin description inputs pin number pin name type pin name 2 3 rdinp rdinn differential pecl serial data input: 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. 5 refclk ttl input reference clock: this input is used as the refe rence 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. 26 cd pecl input carrier detect: 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 look onto the clock frequency generated from refclk. 32 25 divsel1 divsel2 ttl input divider select: 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. 16 clksel ttl input clock select: 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. outputs pin number pin name type pin name 31 lfin ttl output link fault indicator: this output indicates th e 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) and will be alternating if not. lfin is an asynchronous output. 23 24 rdoutn rdoutp differential pecl receive data output: 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. 20 21 rclkn rclkp differential pecl clock output: these ecl 100k outputs represent the recovered clock used to sample the recovered data (rdout). 18 17 tclkp tclkn differential pecl clock output: 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). 9 10 pllsp pllsn clock synthesis pll loop filter: external loop filter pins for the clock synthesis pll. 14 15 pllrn pllrp clock recovery pll loop filter: external loop filter pins for the receiver pll. power and ground pin number pin name type pin name 27, 28 vcc power supply. (1) 29 30 vcca analog power supply voltage. (1) 19, 22 vcco output supply voltage. (1) 12, 13 gnd ground. 1, 4, 6, 7, 8 nc no connect. 11 gnda analog ground. note: 1. vcc, vcca, vcco must be the same value.
micrel, inc. sy69753al august 2007 4 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (1) supply voltage (v cc ) ................................... -0.5v to +5.0v input voltage (v in ) ........................................... -0.5v to v cc output current (i out ) continuou s........................................................ 50ma surge .............................................................. 100ma lead temperature (solderi ng, 20sec.) ................... +260c storage temperature (t s ) ........................-65c to +150c operating ratings (2) input voltage (v cc ) ............................ +3.15v to +3.45v ambient temperature (t a ) ................... ?40c to +85c junction temperature (t j ) ................................ +125c package thermal resistance (3) epad-tqfp ( ja ) still-air (4) ................................................. 28c/w 500lfpm (4) ............................................... 20c/w epad-tqfp ( jc )........................................... 4c/w dc electrical characteristics t a = ?40c to +85c, unless otherwise noted. symbol parameter condition min typ max units v cc power supply voltage 3.15 3.3 3.45 v i cc power supply current 120 160 ma pecl 100k dc electri cal characteristics v cc = v cco = v cca = 3.3v 5%; t a = ?40c to +85c, unless otherwise noted. symbol parameter condition min typ max units v ih input high voltage v cc -1.165 v cc -0.880 v v il input low voltage v cc -1.810 v cc -1.475 v v oh output high voltage 50 ? to v cc -2v v cc -1.075 v cc -0.830 v v ol output low voltage 50 ? to v cc -2v v cc -1.860 v cc -1.570 v i il input low current v in = v il (min) 0.5 a ttl dc electrical characteristics v cc = v cco = v cca = 3.3v 5%; t a = ?40c to +85c, unless otherwise noted. symbol parameter condition min typ max units v ih input high voltage 2.0 v cc v v il input low voltage 0.8 v v oh output high voltage i oh = -0.4ma 2.0 v v ol output low voltage i ol = 4ma 0.5 v i ih input high current v in = 2.7v, v cc = max. v in = v cc , v cc = max. -125 +100 a a i il input low voltage v in = 0.5v, v cc = max. -300 a i os output short circuit current v out = 0v, (max., 1 sec.) -15 -100 ma notes: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional ope ration is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximum ra ting conditions for extended periods may affect device reliability. 2. the data sheet limits are not guaranteed if t he device is operated beyond the operating ratings. 3. airflow of 500lfpm recommended for 28-pin soic. 4. using jedec standard test boards with die attach pad solder ed to pcb. see www.amkor.com for additional package details.
micrel, inc. sy69753al august 2007 5 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 ac electrical characteristics v cc = v cco = v cca = 3.3v 5%; t a = ?40c to +85c, unless otherwise noted. symbol parameter condition min typ max units f vco vco center frequency f refclk x byte rate 720 1250 mhz ? f vco vco center frequency tolerance nominal 5 % t acq acquisition lock time 50 ? to v cc -2v 15 s t cpwh refclk pulse width high 50 ? to v cc -2v 4 ns t cpwl refclk pulse width low v in = v il (min) 4 ns t ir refclk input rise time 0.5 2 ns t odc output duty cycle (rclk/tclk) 45 55 % of ui t r , t f ecl output rise/fall time (20% to 80%) 50 ? to v cc -2 100 400 ps t skew recovered clock skew -200 +200 ps t dv data valid 1/(2xf rclk ) -200 ps t dh data hold 1/(2xf rclk ) -200 ps timing waveforms
micrel, inc. sy69753al august 2007 6 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 functional block 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 corr ection. 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, wit hout incoming data, is guaranteed by an alternate reference input (refclk) that the pll locks onto wh en data is lost. if the frequency of the incoming signal varies by greater than approximately 1000ppm with respect to the synthesizer frequenc y, the pll will be declared out of lock, and the pll will lock to the reference clock. 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 30s data stream of continuous 1's or 0's for random incoming nrz data. lock detect the sy69753al 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 approximatel y 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 cloc k 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. .
micrel, inc. sy69753al august 2007 7 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 loop filter components (1) r1 = 350 ? c1 = 1.0f (x7r dielectric) r2 = 680 ? c2 = 1.0f (x7r dielectric) note: 1. suggested values. values may va ry for different applications. reference frequency selection divsel1 divsel2 f rclk /f refclk 0 0 8 0 1 10 1 0 16 1 1 20
micrel, inc. sy69753al august 2007 8 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 application example ac-coupled i/o
micrel, inc. sy69753al august 2007 9 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 application example dc-coupled i/o related product and su pport 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.m icrel.com/product-info/prod ucts/solutions.shtml
micrel, inc. sy69753al august 2007 10 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 bill of materials (ac-coupled) item part number manufacturer description qty. c6 293d685x0025b2t vishay (1) 6.8f, 25v, tantalum capacitor, size b 1 c7 vj206y103jxjat vishay (1) 0.01f ceramic capacitor, size 1206, x7r dielectric 1 c10, c11 vj0603y105jxjat vishay (1) 1.0f ceramic capacitor, size 0603, x7r dielectric 2 c12-c15, c18, c19, c27, c28 vj0402y104jxjat vishay (1) 0.1f ceramic capacitor, size 0402, x7r dielectric 8 c20-c26 vj0402y104jxjat vishay (1) 0.01f ceramic capacitor, size 1206, x7r dielectric 7 d1 p301-nd panasonic (2) led diode, t-1 3/4, red clear 1 d2 p300-nd/p301-nd vishay (1) t-1 3/4, red led 1 j2, j3, j4, j6 111-0702-001 johnson components (3) red, insulated thumb nut binding post (jumped together) 4 j5 blm21a102f murata (4) black, insulated thumb nut binding post, gnd (jumped to v ee ) 1 q1 459-2598-5-nd nte (5) 2n2222a buffer/driver transistor, npn 1 r1 crcw04023500f vishay (1) 350 ? resistor, 2%, size 0402 1 r2 crcw04026800f vishay (1) 680 ? resistor, 2%, size 0402 1 r3, r8, r9, r10 crcw04021001f vishay (1) 1k ? pull-up resistor, 2%, size 1206 4 r11-r16, r28-r30, r32 crcw04021820f vishay (1) 182 ? resistor, 2%, size 0402 10 r21 crcw06031300f vishay (1) 130 ? resistor, 2%, size 0603 1 r22 crcw04021820f vishay (1) 12.1k ? resistor, 2%, size 1206 1 r23, r24 crcw04022825f vishay (1) 82 ? resistor, 2%, size 0402 2 r25, r26 crcw04021300f vishay (1) 130 ? resistor, 2%, size 0402 2 r27 crcw0402oor0f vishay (1) 0 ? resistor, 2%, size 0402 1 r31 crcw04025000f vishay (1) 50 ? resistor, 2%, size 0402 1 sma1- sma10 142-0701-851 johnson components (3) end launch sma jack 10 sp1-sp6 solder jump option 6 sw1 ct2068-nd cts (6) 8-position, top actuated slide dip switch 1 u1 sy69753al micrel, inc. (7) low-power 3.3v 125mbps to 155mbps 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 .
micrel, inc. sy69753al august 2007 11 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 bill of materials (dc-coupled) item part number manufacturer description qty. c6 293d685x0025b2t vishay (1) 6.8f, 25v, tantalum capacitor, size b 1 c7 vj206y103jxjat vishay (1) 0.01f ceramic capacitor, size 1206, x7r dielectric 1 c10, c11 vj0603y105jxjat vishay (1) 1.0f ceramic capacitor, size 0603, x7r dielectric 2 c12-c15, c18, c19, c27, c28 vj0402y104jxjat vishay (1) 0.1f ceramic capacitor, size 0402, x7r dielectric 8 c20-c26 vj0402y104jxjat vishay (1) 0.01f ceramic capacitor, size 1206, x7r dielectric 7 d1 p301-nd panasonic (2) led diode, t-1 3/4, red clear 1 d2 p300-nd/p301-nd vishay (1) t-1 3/4, red led 1 j2, j3, j4, j6 111-0702-001 johnson components (3) red, insulated thumb nut binding post (jumped together) 4 j5 blm21a102f johnson components (3) black, insulated thumb nut binding post, gnd (jumped to v ee ) 1 q1 459-2598-5-nd nte (5) 2n2222a buffer/driver transistor, npn 1 r1 crcw04023500f vishay (1) 350 ? resistor, 2%, size 0402 1 r2 crcw04026800f vishay (1) 680 ? resistor, 2%, size 0402 1 r3, r8, r9, r10 crcw04021001f vishay (1) 1k ? pull-up resistor, 2%, size 1206 4 r15, r16, r30, r32 crcw04021820f vishay (1) 182 ? resistor, 2%, size 0402 10 r21 crcw06031300f vishay (1) 130 ? resistor, 2%, size 0603 1 r22 crcw04021820f vishay (1) 12.1k ? resistor, 2%, size 1206 1 r23, r24 crcw04022825f vishay (1) 82 ? resistor, 2%, size 0402 2 r27 crcw0402oor0f vishay (1) 0 ? resistor, 2%, size 0402 1 r31 crcw04025000f vishay (1) 50 ? resistor, 2%, size 0402 1 sma1- sma10 142-0701-851 johnson components (3) end launch sma jack 10 sp1-sp6 solder jump option 6 sw1 ct2068-nd cts (6) 8-position, top actuated slide dip switch 1 u1 sy69753al micrel, inc. (7) low-power 3.3v 125mbps to 155mbps 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 .
micrel, inc. sy69753al august 2007 12 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 appendix a layout and general suggestions 1. establish controlled impeda nce stripline, microstrip, or coplanar construction techniques. 2. signal paths should have approximately the same width as the device pads. 3. all differential paths are critical timing paths, where skew should be matched to within 10ps. 4. signal trace impedance should not vary more than 5%. if in doubt, perform tdr analysis of all high-speed signal traces. 5. maintain compact filter networks as close to filter pins as possible. provide ground pl ane relief under filter path to reduce stray capacitance. be careful of crosstalk coupling into the filter network. 6. maintain low jitter on t he 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. 7. 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. 8. all unused outputs requir e termination. to conserve power, unused pecl outputs can be terminated with a 1k ? resistor to vee.
micrel, inc. sy69753al august 2007 13 m9999-082107-e hbwhelp@micrel.com or (408) 955-1690 package information 32-pin package type (h32-1) 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 belie ved to be accurate and reliable. however, no responsibility is a ssumed by micrel for its use. micrel reserves the right to change circuitry and specificati ons at any time without notification to the customer. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. li fe 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 resul t in a significant injury to the user. a purchaser?s use or sale of micrel products for use in life s upport appliances, devices or systems is a pu rchaser?s own risk and purchaser agrees to fully indemnify micrel fo r any damages resulting from such use or sale. ? 2006 micrel, incorporated.

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