p l 6 0 2 - x x hcsl compatible clock generator for pci express micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1(408) 944 - 0800 ? fax +1(408) 474 - 1000 ? www.micrel.com rev 0 2 / 0 8 / 1 1 page 1 features ? input frequency: o fundamental crystal or reference input : 25 mhz ? output frequency : o pl602 - 21: 100mhz differential outputs . o pl602 - 22: 125mhz differential outputs. o pl602 - 23: 200mhz differential outputs. o pl602 - 26: 25mhz differential outputs. o pl602 - 27: 250mhz differential outputs. o pl602 - 15: 156.25 mhz differential outputs. ? very low jitter : 28 ps pk - pk typ . ? very low phase noise: o - 1 30 dbc at 10khz offset at 100mhz ? no external loop filter is required ? power supply range : 2. 2 5v to 3. 6 3v ? operating temperatur e range from - 40 ? c to 85 ? c ? available in 6 - pin sot or 8 - pin sop green/ rohs compliant package . pin configuration description the pl6 0 2 - x x is the smallest, high performance , lowest power differential output clock ic available for hcsl timing applica tions. pl 60 2 - x x offers - 1 30 dbc at 10khz offset at 10 0mhz, with a very low jitter ( 2 ps tie rms) , making it ideal for hcsl applicatio ns requiring small size and low power . block diagram pin description name pin # type description sop sot 23 xin 1 - i crystal input (sop package only) fin - 3 i reference clock input (sot23 package only) gnd 2 2 p gnd c onnection clk[0:1] 3,4 1,6 o differential c lock o utput s [note:clk0=~clk1] vdd 5 5 p vdd c onnection dnc 6 - - do n o t c onnect oe 7 4 i outpu t e nable (oe) input. i nternal 60k? pull up resistor . xout 8 - o crystal output pin. x i n , f i n x o u t o e q b p h a s e l o c k e d l o o p q x t a l o s c p l 6 0 2 - x x 1 2 3 4 5 6 7 8 x i n c l k 0 c l k 1 x o u t d n c v d d o e g n d s o p - 8 l p l 6 0 2 - x x 1 2 3 4 5 6 c l k 1 g n d f i n c l k 0 o e v d d s o t 2 3 - 6 l
p l 6 0 2 - x x hcsl compatible clock generator for pci express micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1(408) 944 - 0800 ? fax +1(408) 474 - 1000 ? www.micrel.com rev 0 2 / 0 8 / 1 1 page 2 electrical specifications absolute maximum ratings parameters symbol min. max. units supply voltage range v dd - 0.5 4.6 v input voltage range v i - 0.5 v dd +0.5 v output voltage range v o - 0.5 v dd +0.5 v soldering temperature 2 6 0 ? c storage temperature t s - 65 150 ? c ambient operating temperature* - 40 +85 ? c exposure of the device under conditions beyond the limits specified by maximum ratings for extended periods may cause permane nt damage to the device and affect product reliability. these conditions represent a stress rating only, and functional operations of the device at these or any other co n ditions above the operational limits noted in this specification is not implied. *operating temperatu re is guaranteed by design. parts are tested to commercial grade only. ac specifications parameters conditions min. typ. max. units crystal input frequency fundamental crystal 25 mhz input (f in ) frequency 25 mhz input (f in ) signal amplitude int ernally ac coupled 0.9 v dd vpp output frequency 25 2 00 mhz o utput enable time oe function; ta=25 o c, add one clock period to this measurement for a usable clock output. 10 ns output disable time oe function; ta=25 o c 10 ns settling time at powe r - up (v dd > 2.25v) 10 ms vdd sensitivity frequency vs. v dd , 10% - 2 2 ppm output rise time 10/90%v oh 0.3 0.5 ns output fall time 90/10%v oh 0.3 0.5 ns skew between outputs measured at 50% v oh 2 50 ps duty cycle at v dd /2 45 50 55 % period j itter, peak - to - peak - with capacitive decoupling between v dd and gn d - at 100mhz - 20,000 samples measured 28 ps cycle - to - cycle, rms 9 ps cycle - to - cycle, peak 25 ps tie, rms 2 ps
p l 6 0 2 - x x hcsl compatible clock generator for pci express micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1(408) 944 - 0800 ? fax +1(408) 474 - 1000 ? www.micrel.com rev 0 2 / 0 8 / 1 1 page 3 dc specifications parameters symbol conditions min. typ. ma x. units supply current, dynamic i dd at 100mhz , no load 25 ma operating voltage v dd 2.25 3.63 v output low voltage v ol hcsl termination, (rs = 150 , rt = 49.9 ) 3.3v (rs = 100 , rt = 49.9 ) 2.5v 0. 0 5 v output high voltage v oh 0.65 0.75 0. 85 v output current i osd 1 3 15 17 ma crystal specifications parameters symbol min. typ. max. units fundamental crystal resonator frequency f xin 25 mhz crystal loading ra t ing c l (x ta l) 18 pf maximum sustainable drive level 500 ? w operating dri ve level 100 ? w crystal shunt capacitance c0 6 pf effective series resistance, fundamental esr 45
p l 6 0 2 - x x hcsl compatible clock generator for pci express micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1(408) 944 - 0800 ? fax +1(408) 474 - 1000 ? www.micrel.com rev 0 2 / 0 8 / 1 1 page 4 pci express/hcsl com patible layout guidelines figure 1 below describes how to terminate the complementary lv cmos outputs of pl 6 02 - x x for use with hcsl inputs. pcb layout considerations for performance optimization the following guidelines are to assist you with a performance optimized pcb design: - keep all the pcb traces to pl 602 - x x as short as possible, as well as keeping all other traces as far away from it as possible. - place the crystal as close as possible to both crystal pins of the device. this will reduce the cross - talk between the crystal and the other signals. - separate crystal pin traces from the other signals on the pcb, but allow ample distance between the two crystal pin traces. - place a 0.01f~0.1f decou pling capacitor between vdd and gnd, on the component side of the pcb, close to the vdd pin. it is not recommended to place this component on the backside of the pcb. - it is highly recommended to keep the vdd and gnd traces as short as possible. - when con necting long traces (> 1 inch) to a cmos output, it is important to design the traces as a transmission line or stripline, to avoid reflections or ringing. in this case, the cmos output needs to be matched to the trace impedance. usually striplines a re designed for 50? impedance and cmos outputs usually have lower than 50? impedance so matching can be achieved by adding a resistor in series with the cmos output pin to the stripline trace. 50 ohm line 50 ohm line rs rs rt rt lvcmos output complementary lvcmos output 0 v 3 . 3 v 0 v 0 . 75 v complementary input input component selection for 3 . 3 v operation rs = 150 ohm rt = 50 ohm notes : place rs as close to the lvcmos outputs as possible . place rt as close to the hcsl inputs as possible . hcsl figure 1 for 2 . 5 v operation rs = 100 ohm rt = 50 ohm
p l 6 0 2 - x x hcsl compatible clock generator for pci express micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1(408) 944 - 0800 ? fax +1(408) 474 - 1000 ? www.micrel.com rev 0 2 / 0 8 / 1 1 page 5 package drawings ( green package com pliant) sop - 8l sot 23 - 6l symb ol dimension in mm min. max. a 1. 35 1.7 5 a1 0.1 0 0.25 a2 1.25 1.50 b 0.33 0.5 3 c 0.19 0.27 d 4.8 0 5.00 e 3.8 0 4.0 0 h 5.80 6.20 l 0. 40 0.89 e 1.27 bsc symbol dimension in mm min. max. a 1.05 1.35 a1 0.05 0.15 a2 1 .00 1.20 b 0.30 0.50 c 0.08 0.20 d 2.80 3.00 e 1.50 1 . 70 h 2.60 3.0 l 0.35 0.55 e 0.95 bsc c l a 2 e h d a 1 e b a c l a 2 e h d a 1 e b a
p l 6 0 2 - x x hcsl compatible clock generator for pci express micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1(408) 944 - 0800 ? fax +1(408) 474 - 1000 ? www.micrel.com rev 0 2 / 0 8 / 1 1 page 6 ordering inform ation ( green package com pliant) micrel inc., reserves the right to make changes in its products or specifications, or both at an y time without notice. the information furnished by micrel is believed to be accurate and reliable. however, micrel makes no guarantee or warranty concerning the accuracy of said information and shall not be re sponsible for any loss or damage of whatever nature resulting from the use of, or reliance upon this product. life support policy : micrels products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of micrel inc . for part ordering, please contact our s ales department: 2 1 80 fortune drive , san jose, ca 95131 , usa tel: (408) 944 - 0800 fax: (408) 474 - 1 000 part number the order number for this device is a combination of the following: part number, package type and operating temperature range part / order number marking package option pl602 - 2x s c p602 - 2x s c lllll 8 - pin sop (tube) pl602 - 2x s c - r 8 - pin sop (tape and reel) pl602 - 1xtc - r f1x lll 6 - pin sot - 23 (tape and reel) pl602 - 2xtc - r f2x lll 6 - pin sot - 23 (tape and reel) note: lll / lllll designate production lot. p l 6 0 2 - x x x x - x p a r t n u m b e r p a c k a g e t y p e s = s o p - 8 l t = s o t 2 3 - 6 l s h i p p i n g o p t i o n n o n e = t u b e r = t a p e & r e e l t e m p e r a t u r e c = c o m m e r c i a l ( 0 c t o 7 0 c ) i = i n d u s t r i a l ( - 4 0 c t o 8 5 c ) f r e q u e n c y d e s i g n a t o r 2 1 = 1 0 0 m h z 2 2 = 1 2 5 m h z 2 3 = 2 0 0 m h z 2 5 = 1 5 6 . 2 5 m h z 2 6 = 2 5 m h z 2 7 = 2 5 0 m h z 1 5 = 1 5 6 . 2 5
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