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october 2005 asm2p2351ah rev 0.2 alliance semiconductor 2575 augustine drive ? santa clara, ca ? tel: 408.855.4900 ? fax: 408.855.4999 ? www.alsc.com notice: the information in this document is subject to change without notice. 1-line to 10-line clock driver with 3-state outputs features ? low output skew, low pulse skew for clock- distribution and clock-generation applications. ? operates at 3.3v supply voltage . ? lvttl-compatible inputs and outputs. ? supports mixed-mode signal operation. (5v input and output voltages with 3.3v supply voltage). ? distributes one clock input to ten outputs. ? outputs have internal series damping resistor to reduce transmission line effects. ? distributed v cc and ground pins reduce switching noise. ? package options include plastic small-outline and shrink small-outline packages. product description the asm2p2351ah is a high-performance clock-driver circuit that distributes one input (a) to ten outputs (y) with minimum skew for clock distribution. the output- enable (oe) input disables the outputs to a high- impedance state. each output has an internal series damping resistor to improve signal integrity at the load. the asm2p2351ah operates at nominal 3.3v supply voltage. the propagation delays are adjusted at the factory using the p0 and p1 pins. the factory adjustments ensure that the part-to-part skew is minimized and is kept within a specified window. pins p0 and p1 are not intended for customer use and should be connected to gnd. the asm2p2351ah is characterized for operation from 0 c to 70 c. logic diagram (positive logic) 5 oe 6 po p1 7 8 a 23 21 19 18 16 14 11 9 4 y9 y8 y7 y6 y5 y4 y3 y2 y1 y10 2
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 2 of 13 notice: the information in this document is subject to change without notice. pin configuration pin description pin # pin name typ description 1 gnd p ground pin 2 y10 o output 10 3 v cc p power supply pin 4 y9 o output 9 5 oe i output enable pin. when this pin is low, the outputs y[1:10] are enabled and when this pin is high , the outputs y[1:10] are disabled. 6 a i input clock 7 p0 - no connect 8 p1 - no connect 9 y8 o output 8 10 v cc p power supply 11 y7 o output 7 12 gnd p ground pin 13 gnd p ground pin 14 y6 o output 6 15 v cc p power supply 16 y5 o output 5 17 gnd p ground pin 18 y4 o output 4 19 y3 o output 3 20 gnd p ground pin 21 y2 o output 2 22 v cc p power supply 23 y1 o output 1 24 gnd p ground pin 2 23 9 16 10 15 p0 y3 1 24 3 22 4 21 5 20 6 19 7 18 8 17 11 14 12 13 y10 gnd v cc y9 oe y8 v cc y7 gnd y6 gnd y4 v cc y2 y1 ssop/ soic packages top view a p1 gnd y5 gnd v cc gnd a s m 2 p 2 3 5 1 a h
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 3 of 13 notice: the information in this document is subject to change without notice. function table inputs outputs a oe in l h z h h z l l l h l h absolute maximum ratings symbol parameter rating unit v cc voltage on supply pin with respect to ground -0.5 to +4.6 v v in voltage on any pin with respect to ground -0.5 to +7.0 v t stg storage temperature -65 to +125 c t a operating temperature 0 to 70 c t s max. soldering temperature (10 sec) 260 c t j junction temperature 150 c t dv static discharge voltage (as per jedec std22- a114-b) 2 kv note: these are stress ratings only and are not implied for functional use. exposure to absolute maximum ratings for prolonged periods of time may affect device reliability. recommended operating conditions (see note 3) . symbol parameter min max unit v cc supply voltage 3 3.6 v v ih high-level input voltage 2 v v il low-level input voltage 0.8 v v i input voltage 0 5.5 v i oh high-level output current ?12 ma i ol low-level output current 12 ma f clock input clock frequency 100 mhz t a operating free air temperature 0 70 c note 3: unused pins (input or i/o) must be held high or low.
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 4 of 13 notice: the information in this document is subject to change without notice. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) parameter test conditions min typ max unit v ik v cc = 3 v, i i = ?18 ma ?1.2 v v oh v cc = 3 v, i oh = ? 12 ma 2 v v ol v cc = 3 v, i ol = 12 ma 0.8 v i i v cc = 3.6 v, v i = v cc or gnd 1 ma i o 1 v cc = 3.6 v, v o = 2.5 v ?7 ?70 ma i oz v cc = 3.6 v, v cc = 3 v 10 ma outputs high 0.3 outputs low 15 i cc v cc = 3.6 v, i o = 0, v i = v cc or gnd outputs disabled 0.3 ma c i v i = v cc or gnd, v cc = 3.3 v, f = 10 mhz 4 pf c o v o = v cc or gnd, v cc = 3.3 v, f = 10 mhz 6 pf note: 1 not more than one output should be tested at a time , and the duration of the test should not exceed one second. switching characteristics, c l = 50 pf (see figures 1 and 2) asm2p2351a asm2p2351ah v cc = 3.3 v, ta = 25c v cc = 3 v to 3.6 v, t a = 0c to 70c parameter from (input) to (output) min typ max min max unit t plh 3.8 4.3 4.8 t phl a y 3.6 4.1 4.6 ns t pzh 2.4 4.9 6.0 1.8 6.9 t pzl oe y 2.4 4.3 6.0 1.8 6.9 ns t phz 2.2 4.4 6.3 2.1 7.1 t plz oe y 2.2 4.6 6.3 2.1 7.3 ns t sk(o) a y 0.3 0.5 0.5 ns t sk(p) a y 0.2 0.8 0.8 ns t sk(pr) a y 1 1 ns t r a y 2.5 ns t f a y 2.5 ns
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 5 of 13 notice: the information in this document is subject to change without notice. switching characteristics temperature and v cc coefficients over recommended operating free-air temperature and v cc range (see note 3) parameter from (input) to (output) min max unit t plh (t) average temperature coefficient of low to high propagation delay a y 85 1 ps/10c t phl (t) average temperature coefficient of high to low propagation delay a y 50 1 ps/10c t plh (v cc ) average v cc coefficient of low to high propagation delay a y ?145 2 ps/ 100 mv t phl (v cc ) average v cc coefficient of high to low propagation delay a y ?100 2 ps/ 100 mv note: 1 t plh (t) and t phl (t) are virtually independent of v cc . 2 t plh (v cc ) and t phl (v cc ) are virtually independent of temperature. 3 this data was extracted from charac terization material and are not tested at the factory.
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 6 of 13 notice: the information in this document is subject to change without notice. parameter measurement information load circuit 500 ? 500 ? from output under test c l = 50pf (see note a) s1 6v gnd open 3v 1.5v input t plh t phl v oh v ol output 1.5v 1.5v 0.8v 0.8v t r t r 2v 2v o v timing input t h t su 3v 1.5v ov data input 3v 1.5v 1.5v input t w 3 v o v 1.5v 1.5v
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 7 of 13 notice: the information in this document is subject to change without notice. figure 1. load circuit and voltage waveforms notes: a. cl includes probe and jig capacitance. b. waveform 1 is for an output with inter nal conditions such that the output is low except when disabled by the output control. waveform 2 is for an output with internal conditions such that the output is high except when disabled by th e output control. c. all input pulses are supplied by generators having the following characte ristics: prr 3 10 mhz, zo = 50 ? , tr 3 2.5 ns, tf 3 2.5 ns. d. the outputs are measured one at a time with one transition per measurement. 3 v 0 v v ol 3 v v ol + o.3 v 1.5 v t phz t plz 1.5 v 1.5 v 0 v t pzh v oh . ? 0.3 v v oh 1.5 v output control (low-level enabling) output waveform 1 s1 at 6 v (see note b) output waveform 2 s1 at gnd (see note b) t phz
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 8 of 13 notice: the information in this document is subject to change without notice. parameter measurement information figure 2. waveforms for calculation of t sk(o) , t sk(p ), t sk(pr) notes: a. output skew, t sk(o), is calculated as the greater of: ? the difference between the fastest and slowest of t plhn (n = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) ? the difference between the fastest and slowest of t phln (n = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) b. pulse skew, t sk(p) , is calculated as the greater of | t plh n ? t phln | (n = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10). c. process skew, t sk(pr) , is calculated as the greater of: ? the difference between the fastest and slowest of t plhn (n = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) across multiple devices under identical operating conditions ? the difference between the fastest and slowest of t phln (n = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) across multiple devices under identical operating conditions y9 t phl 10 t plh 10 t phl 9 t plh 9 t phl 8 t plh 8 t phl 7 t plh 7 t phl 6 t plh 6 t phl 5 t plh 5 t phl 4 t plh 4 t phl 3 t plh 3 t phl 2 t plh 2 t plh 1 t phl 1 y8 y7 y6 y5 y4 y3 y2 y1 a y10
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 9 of 13 notice: the information in this document is subject to change without notice. package information 24l ssop package (209 mil) dimensions inches millimeters symbol min max min max a ?. 0.079 ? 2.0 a1 0.002 ? 0.05 ? a2 0.065 0.073 1.65 1.85 d 0.315 0.331 8.00 8.40 l 0.021 0.037 0.55 0.95 e 0.295 0.319 7.50 8.10 e1 0.197 0.220 5.00 5.60 r1 0.004 ?. 0.09 ?.. b 0.009 0.015 0.22 0.38 c 0.004 0.010 0.09 0.25 l1 0.050ref 1.25 ref e 0.026 bsc 0.65 bsc a 0 8 0 8
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 10 of 13 notice: the information in this document is subject to change without notice. 24l soic package (300 mil) dimensions inches millimeters symbol min max min max a 0.093 0.104 2.35 2.65 a1 0.004 0.012 0.10 0.30 a2 0.088 0.094 2.25 2.40 d 0.598 0.614 15.20 15.60 l 0.016 0.050 0.40 1.27 e1 0.291 0.299 7.40 7.60 r1 0.003 ?. 0.08 ?.. b 0.013 0.022 0.33 0.56 c 0.009 0.015 0.23 0.38 e 0.394 0.419 10.00 10.65 e 0.050 bsc 1.27 bsc a 0 8 0 8
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 11 of 13 notice: the information in this document is subject to change without notice. ordering information part number marking package type temperature asm2p2351ahf-24ar 2p2351ahf 24-pin ssop, tape & reel, pb free commercial asm2p2351ahf-24at 2p2351ahf 24-pin ssop, tube, pb free commercial asm2p2351ahf -24sr 2p2351a hf 24-pin soic, tape & reel, pb free commercial asm2p2351ahf-24st 2p2351ahf 24-pin soic, tube, pb free commercial asm2p2351af-24ar 2p2351af 24-pin ssop, tape & reel, pb free commercial asm2p2351af-24at 2p2351af 24-pin ssop, tube, pb free commercial asm2p2351af -24sr 2p2351af 24-pin soic , tape & reel, pb free commercial ASM2P2351AF-24ST 2p2351af 24-pin soic, tube, pb free commercial asm2p2351ahg-24ar 2p2351ahg 24-pin sso p, tape & reel, green commercial asm2p2351ahg-24at 2p2351ahg 24-pi n ssop, tube, green commercial asm2p2351ahg -24sr 2p2351ahg 24-pin soic, tape & reel, green commercial asm2p2351ahg-24st 2p2351ahg 24-pin soic, tube, green commercial asm2p2351ag-24ar 2p2351ag 24-pin ssop, tape & reel, green commercial asm2p2351ag-24at 2p2351ag 24-pin ssop, tube, green commercial asm2p2351ag -24sr 2p2351ag 24-pin soic, tape & reel, green commercial asm2p2351ag-24st 2p2351ag 24-pin soic, tube, green commercial asm2p2351ah-24ar 2p2351ah 24-pin ssop, tape & reel commercial asm2p2351ah-24at 2p2351ah 24-pin ssop, tube commercial asm2p2351ah -24sr 2p23 51ah 24-pin soic, tape & reel commercial asm2p2351ah-24st 2p2351ah 24-pin soic, tube commercial asm2p2351a-24ar 2p2351a 24-pin ssop, tape & reel commercial asm2p2351a-24at 2p2351a 24-pin ssop, tube commercial asm2p2351a -24sr 2p23 51a 24-pin soic, tape & reel commercial asm2p2351a-24st 2p2351a 24-pin soic, tube commercial
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 12 of 13 notice: the information in this document is subject to change without notice. device ordering information asm2p2351ahf-24 ar licensed under us patent nos 5,488,627 and 5,631,920. o = sot u = msop s = soic e = tqfp t = tssop l = lqfp a = ssop u = msop v = tvsop p = pdip b = bga d = qsop q = q fn x = sc-70 device pin count x= automotive i= industrial p or n/c = commercial (-40c to +125c) (-40c to +85c) (0c to +70c) 1 = reserved 6 = power management 2 = non pll based 7 = power management 3 = emi reduction 8 = power management 4 = ddr support products 9 = hi performance 5 = s td z e r o d e l ay b u ff er 0 = r ese rv ed alliance semiconductor mixed signal product part number f = lead free and rohs compliant part g = green package r = tape & reel, t = tube or tray
october 2005 asm2p2351ah rev 0.2 1-line to 10-line clock driver with 3-state outputs 13 of 13 notice: the information in this document is subject to change without notice. note: this product utilizes us patent # 6,646,463 impedance emulator patent issued to alliance semiconductor, dated 11-11-2003 ? copyright 2003 alliance 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 reserves the right to make ch anges to this document and its products at any time without notice. alliance assumes no responsibility for any errors t hat may appear in this document. the data contained herein represents alliance's best data and/or estimate s at the time of issuance. alliance rese rves 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 in tended to operate as, or provide, any guarantee or warrantee to any user or customer. alliance does not assume any responsibility or lia bility arising out of the applic ation or use of any product described herein, and disclaims any express or implied warrant ies related to the sale and/or use of alliance products including liability or warranties related to fitness for a particular purpose, mercha ntability, or infringement of any intellec tual 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 conditions of sale. the purchase of products from alliance does not convey a license under any pa tent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of alli ance or third parties. alliance does not aut horize its products for use as critical components in life-supporting systems where a malfunction or fa ilure 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 manufacturer assumes all risk of such use and agrees to indemnify alliance against all claims arising from such use. alliance semiconductor corporation 2575 augustine drive, santa clara, ca 95054 tel# 408-855-4900 fax: 408-855-4999 www.alsc.com copyright ? alliance semiconductor all rights reserved advance information part number: asm2p2351ah document version: v0.2

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