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august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. 3.3v zero - delay buffer general features ? ? ? ? ? ? ? ? ? ? ? ? ? functional description asm5p2308a is a versatile, 3.3v zero - delay buffer design ed to distribute high - speed clocks. it is available in a 16 - pin package. the part has an on - chip pll which locks to an input clock presented on the ref pin. the pll feedback is required to be driven to fbk pin, and can be obtained from one of the outputs. the input - to - input propagation delay is guaranteed to be less than 350ps, and the output - to - output skew is guaranteed to be less than 250ps. the asm5p2308a has two banks of four outputs each, which can be controlled by the select inputs as shown in the se lect input decoding table. if all the output clocks are not required, bank b can be three - stated. the select input also allows the input clock to be directly applied to the outputs for chip and system testing purposes. multiple asm5p2308a devices can acce pt the same input clock and distribute it. in this case the skew between the outputs of the two devices is guaranteed to be less than 700ps. the asm5p2308a is available in five different
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. block diagram select input deco ding for asm5p2308a s2 s1 clock a1 - a4 clock b1 - b4 output source pll shut - down 0 0 three - state three - state pll y 0 1 driven three - state pll n 1 0 driven 1 driven reference y 1 1 driven driven pll n asm5p2308a configurations device feedback from ban k a frequency bank b frequency asm5p2308a - 1 bank a or bank b reference reference asm5p2308a - 1h bank a or bank b reference reference asm5p2308a - 2 bank a reference reference /2 asm5p2308a - 2 bank b 2 x reference reference asm5p2308a - 3 bank a 2 x referenc e reference or reference 2 asm5p2308a - 3 bank b 4 x reference 2 x reference asm5p2308a - 4 bank a or bank b 2 x reference 2 x reference asm5p2308a - 5h bank a or bank b reference /2 reference /2 note: 1. outputs inverted on 2308 - 2 and 2308 - 3 in bypass mode, s2 = 1 and s1 = 0. 2. output phase is indeterminant (0 or 180 from input clock). if phase integrity is required, use the asm5p2308a - 2. clka1 clka2 clka3 clka4 clkb1 clkb2 clkb3 clkb4 fbk ref s1 s2 select input mux asm5p2308a decoding pll /2 /2 /2 extra divider ( - 3, - 4) extra divider ( - 5h) extra divider ( - 2, - 3)
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. zero delay and skew control all outputs should be uniformly loaded to achieve zero delay between input and output. to close the feedback loop of the asm5p2308a, the fbk pin can be driven from any of the eight available output pins. the output driving the fbk pin will be driving a total load of 7 pf plus any additional load that it drives. the relative loading of this output (with respect to the remaining outputs) can adjust the input output delay. this is shown in the above graph. for applications requiring zero input - output delay, all outputs including the one providing feedback should be equally loa ded. if input - output delay adjustments are required, use the above graph to calculate loading differences between the feedback output and remaining outputs. for zero output - output skew, be sure to load outputs equally. - 30 - 25 - 20 - 15 - 10 - 5 0 5 10 15 20 25 30 0 - 500 - 1000 - 1500 500 1000 1500 output load difference: fbk load - c lka/clkb load (pf) r e f - i n p u t t o c l k a / c l k b d e l a y
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. pin configuration pin description for asm5p2308a pin # pin name description 1 ref 3 input reference frequency, 5v tolerant input 2 clka1 4 buffered clock output, bank a 3 clka2 4 buffered clock output, bank a 4 v dd 3.3v supply 5 gnd ground 6 clkb1 4 buffered clock output, ba nk b 7 clkb2 4 buffered clock output, bank b 8 s2 5 select input, bit 2 9 s1 5 select input, bit 1 10 clkb3 4 buffered clock output, bank b 11 clkb4 4 buffered clock output, bank b 12 gnd ground 13 v dd 3.3v supply 14 clka3 4 buffered clock output, bank a 15 clka4 4 buffered clock output, bank a 16 fbk pll feedback input notes: 3. weak pull - down. 4. weak pull - down on all outputs. 5. weak pull - up on these inputs. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ref clka1 clka2 clka3 clka4 clkb1 clkb2 clkb3 clkb4 v dd gnd s2 fbk s1 gnd v dd asm5p2308a
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. absolute maximum ratings operating conditions for asm5p2308a commercial temperature devices paramet er description min max unit v dd supply voltage 3.0 3.6 v t a operating temperature (ambient temperature) 0 70 c c l load capacitance, below 100 mhz 30 pf c l load capacitance, from 100 mhz to 133 mhz 10 pf c in input capacitance 6 7 pf note: 6. applie s to both ref clock and fbk. electrical characteristics for asm5p2308a commercial temperature devices parameter description test conditions min max unit v il input low voltage 0.8 v v ih input high voltage 2.0 v i il input low current v in = 0v 50.0 a i ih input high current v in = v dd 100.0 a v ol output low voltage 7 i ol = 8ma ( - 1, - 2, - 3, - 4) i oh = 12ma ( - 1h, - 5h) 0.4 v v oh output high voltage 7 i ol = - 8ma ( - 1, - 2, - 3, - 4) i oh = - 12ma ( - 1h, - 5h) 2.4 v unloaded outputs 100mh z ref tbd select inputs at v dd or gnd tbd unloaded outputs, 66mhz ref ( - 1, - 2, - 3, - 4) tbd i dd supply current unloaded outputs, 33mhz ref ( - 1, - 2, - 3, - 4) tbd ma parameter min max unit supply voltage to ground potential - 0.5 +7.0 v dc input voltage (except ref) - 0.5 vdd + 0.5 v dc input voltage (ref) - 0.5 7 v storage temperature - 65 +150 c max. soldering temperature (10 sec) 260 c junction temperature 150 c static discharge voltage (per mil - std - 883, method 3015) >2000 v note: these are stress ratings only and functional usage is not implied. exposure to absolute maximum ratings for prolonged periods can affect device reliability.
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. note: 7. parameter is guaranteed by design and characterization. not 100% tested in production . 8. s1 / s2 inputs are cmos, ttl compatible inputs the input must toggle somewhere between 0.8 and 2.0. we guarantee the limits of 0.8 and 2.0, but can't guarantee anything tighter than that. as vdd moves higher the toggle point will move higher, but will always stay below 2.0v. as vdd moves lower, the toggle point will move lower, but always stay higher than 0.8v. what the 2.0v min vih specification means is that you put 2.0v or a higher voltage into the device, and you will have a logic high. if you put 0.8v or a lower voltage into the device, you will have a lo gic low ( vil spec = 0.8v max) . it will toggle someplace in between 0.8v and 2.0v, but we don't guarantee exactly where, and the exact point will change depending upon conditions. charact erization shows we toggle at 1.1v and 1.5v (showing a little hysteresis), everything is perfect. we meet spec, plus have ~ 300mv noise immunity on the low end and ~500mv noise immunity on the high side. under nominal conditions, with no hysteresis, most devices will toggle at about 1.5v for both high and low.
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. switching characteristics for asm5p2308a commercial temperature devices parameter description test conditions min typ max unit t 1 output frequency 30 - pf load, all devices 10 100 mhz t 1 output frequency 20 - pf load, - 1h, - 5h devices 8 10 133.3 mhz t 1 output frequency 15 - pf load, - 1, - 2, - 3, - 4 devices 10 133.3 mhz duty cycle 7 = (t 2 / t 1 ) * 100 ( - 1, - 2, - 3, - 4, - 1h, - 5h) measured at 1.4v, f out = <66.66 mhz 30 - pf load 40.0 50.0 60.0 % duty cycle 7 = (t 2 / t 1 ) * 100 ( - 1, - 2, - 3, - 4, - 1h, - 5h) measured at 1.4v, f out = <50 mhz 15 - pf load 45.0 50.0 55.0 % t 3 output rise time 7 ( - 1, - 2, - 3, - 4) measured between 0.8v and 2.0v 30 - pf load 2.20 ns t 3 output rise time 7 ( - 1, - 2, - 3, - 4) measured between 0.8v and 2.0v 15 - pf load 1.50 ns t 3 output rise time 7 ( - 1h, - 5h) measured between 0.8v and 2.0v 30 - pf load 1.50 ns t 4 output fall time 7 ( - 1, - 2, - 3, - 4) measured between 2.0v and 0.8v 30 - pf load 2.20 ns t 4 output fall time 7 ( - 1, - 2, - 3, - 4) measured between 0.8v and 2.0v 15 - pf load 1.50 ns t 4 output fall time 7 ( - 1h, - 5h) measured between 2.0v and 0.8v 30 - pf load 1.25 ns output - to - output skew on same bank ( - 1, - 2, - 3, - 4) 7 all outputs equally loaded 200 ps output - to - outp ut skew ( - 1h, - 5h) all outputs equally loaded 200 output bank a - to - output bank b skew ( - 1, - 4, - 5h) all outputs equally loaded 200 t 5 output bank a - to - output bank b skew ( - 2, - 3) all outputs equally loaded 400 t 6 delay, ref rising edge to fb k rising edge 6 measured at v dd /2 0 250 ps t 7 device - to - device skew 7 measured at v dd /2 on the fbk pins of the device 0 700 ps measured at 66.67 mhz, loaded outputs, 15 pf load 200 ps measured at 66. 67 mhz, loaded outputs, 30 pf load 200 t j cycle - to - cycle jitter 7 ( - 1, - 1h, - 4, - 5h) measured at 133.3 mhz, loaded outputs, 15 pf load 100 measured at 66.67 mhz, loaded outputs, 30pf load 400 ps t j cycle - to - cycle jitter 7 ( - 2, - 3) measured at 66.67 mhz, loaded outputs, 15 pf load 40 0 t lock pll lock time 7 stable power supply, valid clock presented on ref and fbk pins 1.0 ms
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. switching characteristics for asm5i2308a - industrial temperature devices parameter description test conditions min typ max unit t 1 output frequency 30 - p f load, all devices 10 100 mhz t 1 output frequency 20 - pf load, - 1h, - 5h devices 8 10 133.3 mhz t 1 output frequency 15 - pf load, - 1, - 2, - 3, - 4 devices 10 133.3 mhz duty cycle 7 = (t 2 / t 1 ) * 100 ( - 1, - 2, - 3, - 4, - 1h, - 5h) measured at 1.4v, f out = <66 .66 mhz 30 - pf load 40.0 50.0 60.0 % duty cycle 7 = (t 2 / t 1 ) * 100 ( - 1, - 2, - 3, - 4, - 1h, - 5h) measured at 1.4v, f out = <50 mhz 15 - pf load 45.0 50.0 55.0 % t 3 output rise time 7 ( - 1, - 2, - 3, - 4) measured between 0.8v and 2.0v 30 - pf load 2.50 ns t 3 out put rise time 7 ( - 1, - 2, - 3, - 4) measured between 0.8v and 2.0v 15 - pf load 1.50 ns t 3 output rise time 7 ( - 1h, - 5h) measured between 0.8v and 2.0v 30 - pf load 1.50 ns t 4 output fall time 7 ( - 1, - 2, - 3, - 4) measured between 2.0v and 0.8v 30 - pf load 2.50 ns t 4 output fall time 7 ( - 1, - 2, - 3, - 4) measured between 0.8v and 2.0v 15 - pf load 1.50 ns t 4 output fall time 7 ( - 1h, - 5h) measured between 2.0v and 0.8v 30 - pf load 1.25 ns output - to - output skew on same bank ( - 1, - 2, - 3, - 4) 7 all output s equally loaded 200 ps output - to - output skew ( - 1h, - 5h) all outputs equally loaded 200 output bank a - to - output bank b skew ( - 1, - 4, - 5h) all outputs equally loaded 200 t 5 output bank a - to - output bank b skew ( - 2, - 3) all outputs equally l oaded 400 t 6 delay, ref rising edge to fbk rising edge 7 measured at v dd /2 0 250 ps t 7 device - to - device skew 7 measured at v dd /2 on the fbk pins of the device 0 700 ps measured at 66.67 mhz, loaded ou tputs, 15 pf load 200 ps measured at 66.67 mhz, loaded outputs, 30 pf load 200 t j cycle - to - cycle jitter 7 ( - 1, - 1h, - 4, - 5h) measured at 133.3 mhz, loaded outputs, 15 pf load 100 measured at 66.67 mhz, loaded outputs, 30pf load 400 ps t j cycle - to - cycle jitter 7 ( - 2, - 3) measured a t 66.67 mhz, loaded outputs, 15 pf load 400 t lock pll lock time 7 stable power supply, valid clock presented on ref and fbk pins 1.0 ms
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. switching waveforms duty cycle timing all outputs rise/fall time output - output skew input - output propagation delay device - device skew t 1 t 2 1.4 v 1.4 v 1.4 v output 2.0 v 0.8 v t3 t4 3.3 v 0 v 2.0 v 0.8 v 1.4 v 1.4 v t 5 output output v dd /2 t 6 in put output v d d /2 v dd /2 t 7 clkout, device 1 v dd /2 clkout, device 2
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. test circuits 1k ? 10 pf v dd gnd outputs clk out c load 0.1 ?f 1k ? 0.1 ?f 0.1 ?f 0.1 ?f v dd v dd v dd gnd gnd gnd outputs test circuit #1 test circuit #2 for parameter t 8 (output sle w rate) on - 1h devices
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. package information: 16 - lead (150 mil) molded soic dimensions (inches) dimensions (milli meters) symbol min max min max a 0.061 0.068 1.55 1.73 a1 0.004 0.0098 0.102 0.249 a2 0.055 0.061 1.40 1.55 b 0.013 0.019 0.33 0.49 c 0.0075 0.0098 0.191 0.249 d 0.386 0.393 9.80 9.98 e 0.150 0.157 3.81 3.99 e 0.050 bsc 1.27 bsc h 0.230 0.244 5.84 6.20 h 0.010 0.016 0.25 0.41 l 0.016 0.035 0.41 0.89 ? 0 8 0 8 e h a a1 a2 d e b ? l c h seating plane d 0.004 pin 1 id 1 8 9 16
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. package information: 16 - lead thin shrunk small outline package (4.40 - mm body) dimensions (inches) dimensions (mm) symbol min max min max a 0.043 1.10 a1 0.002 0.006 0.05 0.15 a2 0.003 0.37 0.85 0.95 b 0.007 0.012 0.19 0.30 c 0.004 0.008 0.09 0.20 d 0.193 2.008 4.90 5.10 e 0.169 0.177 4.30 4.50 e 0.026 bsc 0.65 bsc h 0.246 0.256 6.25 6.50 l 0.020 0.028 0.50 0.70 ? 0 8 0 8 d e h d a a1 b e ? l c a2 pin 1 id 1 8 9 16 seating plane
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. ordering codes ordering code package type operating range asm5p2308a - 1 - 16 - st 16 - p in 150 - mil soic - tube commercial asm5i2308a - 1 - 16 - st 16 - pin 150 - mil soic - tube industrial asm5p2308a - 1 - 16 - sr 16 - pin 150 - mil soic - tape & reel commercial asm5i2308a - 1 - 16 - sr 16 - pin 150 - mil soic - tape & reel industrial asm5p2308a - 1 - 16 - tt 16 - pin 150 - mil tssop - tube commercial asm5i2308a - 1 - 16 - tt 16 - pin 150 - mil tssop - tube industrial asm5p2308a - 1 - 16 - tr 16 - pin 150 - mil tssop - tape & reel commercial asm5i2308a - 1 - 16 - tr 16 - pin 150 - mil tssop - tape & reel industrial asm5p2308a - 1h - 16 - st 16 - pin 150 - mil soic - tube c ommercial asm5i2308a - 1h - 16 - st 16 - pin 150 - mil soic - tube industrial asm5p2308a - 1h - 16 - sr 16 - pin 150 - mil soic - tape & reel commercial asm5i2308a - 1h - 16 - sr 16 - pin 150 - mil soic - tape & reel industrial asm5p2308a - 1h - 16 - tt 16 - pin 150 - mil tssop - tube commercial asm5i2308a - 1h - 16 - tt 16 - pin 150 - mil tssop - tube industrial asm5p2308a - 1h - 16 - tr 16 - pin 150 - mil tssop - tape & reel commercial asm5i2308a - 1h - 16 - tr 16 - pin 150 - mil tssop - tape & reel industrial asm5p2308a - 2 - 16 - st 16 - pin 150 - mil soic - tube commercial asm5i 2308a - 2 - 16 - st 16 - pin 150 - mil soic - tube industrial asm5p2308a - 2 - 16 - sr 16 - pin 150 - mil soic - tape & reel commercial asm5i2308a - 2 - 16 - sr 16 - pin 150 - mil soic - tape & reel industrial asm5p2308a - 2 - 16 - tt 16 - pin 150 - mil tssop - tube commercial asm5i2308a - 2 - 16 - tt 16 - pin 150 - mil tssop - tube industrial asm5p2308a - 2 - 16 - tr 16 - pin 150 - mil tssop - tape & reel commercial asm5i2308a - 2 - 16 - tr 16 - pin 150 - mil tssop - tape & reel industrial asm5p2308a - 3 - 16 - st 16 - pin 150 - mil soic - tube commercial asm5i2308a - 3 - 16 - st 16 - pin 15 0 - mil soic - tube industrial asm5p2308a - 3 - 16 - sr 16 - pin 150 - mil soic - tape & reel commercial asm5i2308a - 3 - 16 - sr 16 - pin 150 - mil soic - tape & reel industrial asm5p2308a - 3 - 16 - tt 16 - pin 150 - mil tssop - tube commercial asm5i2308a - 3 - 16 - tt 16 - pin 150 - mil tssop - tube industrial asm5p2308a - 3 - 16 - tr 16 - pin 150 - mil tssop - tape & reel commercial asm5i2308a - 3 - 16 - tr 16 - pin 150 - mil tssop - tape & reel industrial
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. ordering codes (contd) ordering code package type operating range asm5p2308a - 4 - 16 - st 16 - pin 150 - mil soi c - tube commercial asm5i2308a - 4 - 16 - st 16 - pin 150 - mil soic - tube industrial asm5p2308a - 4 - 16 - sr 16 - pin 150 - mil soic - tape & reel commercial asm5i2308a - 4 - 16 - sr 16 - pin 150 - mil soic - tape & reel industrial asm5p2308a - 4 - 16 - tt 16 - pin 150 - mil tssop - tube commerc ial asm5i2308a - 4 - 16 - tt 16 - pin 150 - mil tssop - tube industrial asm5p2308a - 4 - 16 - tr 16 - pin 150 - mil tssop - tape & reel commercial asm5i2308a - 4 - 16 - tr 16 - pin 150 - mil tssop - tape & reel industrial asm5p2308a - 5h - 16 - st 16 - pin 150 - mil soic - tube commercial asm 5i2308a - 5h - 16 - st 16 - pin 150 - mil soic - tube industrial asm5p2308a - 5h - 16 - sr 16 - pin 150 - mil soic - tape & reel commercial asm5i2308a - 5h - 16 - sr 16 - pin 150 - mil soic - tape & reel industrial asm5p2308a - 5h - 16 - tt 16 - pin 150 - mil tssop - tube commercial asm5i2308a - 5h - 16 - tt 16 - pin 150 - mil tssop - tube industrial asm5p2308a - 5h - 16 - tr 16 - pin 150 - mil tssop - tape & reel commercial asm5i2308a - 5h - 16 - tr 16 - pin 150 - mil tssop - tape & reel industrial
august 200 4 asm5p2308a rev 2.0 3.3v zero delay buffer notice: the information in this document is subject to change without notice. ? copyright 2003 al liance semiconductor corporation. all rights reserved. our three - point logo, our name and intelliwatt are trademarks or registered trademarks of alliance. all other brand and product names may be the trademarks of their respective companies. alliance reser ves the right to make changes to this document and its products at any time without notice. alliance assumes no responsibility for any errors that may appear in this document. the data contained herein represents alliance's best data and/or estimates at th e time of issuance. alliance reserves the right to change or correct this data at any time, without notice. if the product described herein is under development, significant changes to these specifications are possible. the information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. alliance does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of alliance products including liability or warranties related to fitness for a particular purpose, merchantabilit y, or infringement of any intellectual property rights, except as express agreed to in alliance's terms and conditions of sale (which are available from alliance). all sales of alliance products are made exclusively according to alliance's terms and condit ions of sale. the purchase of products from alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of alliance or third parties. alliance does not authorize its produ cts for use as critical components in life - supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of alliance products in such life - supporting systems implies that the man ufacturer assumes all risk of such use and agrees to indemnify alliance against all claims arising from such use. alliance semiconductor corporation 2595, augustine drive, santa clara, ca 95054 tel# 408 - 855 - 4900 fax: 408 - 855 - 4999 www.alsc.com copyright t alliance semiconductor all rights reserved preliminary information part number: asm5p2308a document version: v 2 .0 8_30_2004

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