? semiconductor components industries, llc, 2011 march, 2011 ? rev. 1 1 publication order number: ncn9252/d ncn9252 high-speed usb 2.0 (480 mbps) dp3t switch for usb/uart/data multiplexing brief description the ncn9252 is a dp3t switch for combined uart and usb 2.0 high ? speed data applications. it allows portable systems to use a single external port to transmit and receive signals to and from three separate locations within the portable system. it is comprised of two switches, each with a single common i/o that alternates between 3 terminals. they are operated together to allow three data sources, such as a usb or uart transceiver, to pass differential data through a shared usb connector port. the ncn9252 features low r on ? 4 (max) at 4.2 v v cc , 5 (typ) at a 3.3 v v cc . it also features low c on , < 30 pf (max) across the supply voltage range. this performance makes it ideal for both usb full ? speed and high ? speed applications that require both low r on and c on for effective signal transmission. the ncn9252 is capable of accepting control input signals down to 1.4 v, over a range of v cc supply voltages with minimal leakage current. the ncn9252 is offered in a pb ? free, 12 pin, 1.7 x 2.0 x 0.5 mm, uqfn package. an evaluation board specifically designed for the ncn9252 is available and features usb connectors and test points to allow straightforward testing of the device. please see part number ncn9252mugevb. features ? usb 2.0 signal routing ? ? 3 db bandwidth: 525 mhz ? r on : 4 max @ v cc = 4.2 v ? c on : < 20 pf @ v cc = 3.3 v ? ovt protection up to 5.25 v on common pins ? v cc range: 1.65 v to 4.5 v ? 3 kv esd protection ? 1.7 x 2.0 x 0.5 mm uqfn12 package ? this is a pb ? free device typical applications ? usb/uart/data multiplexing ? shared usb connector ? mobile phones ? portable devices uqfn12 mu suffix case 523ae marking diagram http://onsemi.com device package shipping ? ordering information ncn9252mutag uqfn12 (pb ? free) 3000 / tape & reel application diagram ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specification brochure, brd8011/d. ad = specific device code m = date code = pb ? free package ad m 1 ncn9252 usb connector usb xcvr remote data uart xcvr d+ d ? d+ d ? r l rx tx in[1:0] from baseband
ncn9252 http://onsemi.com 2 functional block diagram and pinout (top view) figure 1. internal block diagram 1 2 3 4 5 11 10 9 8 7 12 6 1s3 v cc 2s3 2s2 in1 com1 gnd com2 in2 1s2 1s1 2s1 control logic pin descriptions pin# name direction description 1 1s2 i/o switch #1 position 2 signal line 2 1s3 i/o switch #1 position 3 signal line 3 v cc input power supply 4 2s3 i/o switch #2 position 3 signal line 5 2s2 i/o switch #2 position 2 signal line 6 2s1 i/o switch #2 position 1 signal line 7 in2 input bit 1 control input select line 8 com2 i/o switch #2 common signal line 9 gnd input ground 10 com1 i/o switch #1 common signal line 11 in1 input bit 0 control input select line 12 1s1 i/o switch #1 position 1 signal line function table in1 [0] in2 [1] com1 closed to: com2 closed to: 0 0 no connect no connect 1 0 1s1 2s1 0 1 1s2 2s2 1 1 1s3 2s3 figure 2. functional block diagram 1s1 1s2 1s3 2s1 2s2 2s3 com1 com2 in1 in2 control logic
ncn9252 http://onsemi.com 3 operating conditions maximum ratings symbol pins parameter value condition unit v cc v cc positive dc supply voltage ? 0.5 to +5.5 v v is 1sx, 2sx analog signal voltage ? 0.5 to v cc + 0.3 v comx ? 0.5 to 5.3 v in in1, in2 control input voltage ? 0.5 to 4.6 v i cc v cc positive dc supply current 50 ma i is_con 1sx, 2sx comx analog signal continuous current 300 closed switch ma i is_pk 1sx, 2sx comx analog signal peak current 500 10% duty cycle ma i in in1, in2 control input current 20 ma t stg storage temperature range ? 65 to 150 c stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. recommended operating conditions symbol pins parameter value condition unit v cc v cc positive dc supply voltage 1.65 to 4.5 v v is 1sx, 2sx analog signal voltage gnd to v cc v comx gnd to 4.5 v in in1, in2 control input voltage gnd to v cc v t a operating temperature range ? 40 to 85 c minimum and maximum values are guaranteed through test or design across the recommended operating conditions , where ap- plicable. typical values are listed for guidance only and are based on the particular conditions listed for each section, where applicable. these conditions are valid for all values found in the characteristics tables unless otherwise specified in the test conditions . esd protection pins description minimum voltage all pins human body model 3 kv
ncn9252 http://onsemi.com 4 dc electrical characteristics control input (typical: t = 25 c; v cc = 3.3 v) symbol pins parameter test conditions v cc min typ max unit v ih inx control input high figure 3 2.7 v 3.3 v 4.2 v 1.25 1.35 1.50 v v il inx control input low figure 3 2.7 v 3.3 v 4.2 v 0.4 0.4 0.5 v i in inx control input leakage v is = gnd 1.0 a supply current and leakage (typical: t = 25 c; v cc = 3.3 v, v in = v cc or gnd) symbol pins parameter test conditions v cc min typ max unit i no/nc (off) nc, no off state leakage v com = 3.6 v v nc = 1.0 v 1.0 a i com (on) com on state leakage 1.0 a i cc v cc quiescent supply v is = v cc or gnd, i d = 0; 1.0 a ioff power off leakage v is = gnd 1.0 a on resistance (typical: t = 25 c; v cc = 3.3 v) symbol pins parameter test conditions v cc min typ max unit r on 1sx, 2sx comx on resistance i on = ? 8 ma, v is = 0 to v cc ; 2.7 v 3.3 v 4.2 v 5 4 3.5 6 5 4.5 r flat 1sx, 2sx comx r on flatness i on = ? 8 ma, v is = 0 to v cc ; 2.7 v 3.3 v 4.2 v 1.3 1.4 1.6 r on 1sx, 2sx comx r on matching i on = ? 8 ma, v is = 0 to v cc ; 2.7 v 3.3 v 4.2 v 0.35
ncn9252 http://onsemi.com 5 ac electrical characteristics timing/frequency (typical: t = 25 c; v cc = 3.3 v, r l = 50 , c l = 5 pf, f = 1 mhz) symbol pins parameter test conditions min typ max unit bw ? 3 db bandwidth power level = 0 dbm 525 mhz thd total harmonic distortion 20 hz to 20 khz, 1.0 v pp 0.01 % t on 1sx to 1sy, 2sx to 2sy turn on time 13 30 ns t off 1sy to 1sx, 2sy to 2sx turn off time 12 25 ns t bbm 1sx to 1sy, 2sx to 2sy break before make 2.0 ns crosstalk: (typical: t = 25 c; v cc = 3.3v, r l = 50 , c l = 35 pf, f = 1mhz) symbol pins parameter test conditions min typ max unit o irr 1sx or 2sx off isolation v in = 0 ? 60 db x talk comx to comy non ? adjacent channel ? 60 db capacitance (typical: t = 25 c; v cc = 3.3v, r l = 50 , c l = 5 pf, f = 1 mhz) symbol pins parameter test conditions min typ max unit c in inx control input v cc = 0 v 3 pf c on 1sx or 2sx to com through switch v cc = 3.3 v, v in = 0 v 16 20 pf c off 1sx, 2sx comx unselected port v cc = v in = 3.3 v 8 pf
ncn9252 http://onsemi.com 6 detailed description the ncn9252 is a dp3t switch designed for applications where a single usb connector is used for multiple data applications within a portable system. two differential signals from a usb connector can be routed to 3 different end locations. the first, channel 1, is optimized for a high ? speed, usb 2.0 transceiver. the second and third, channels 2 and 3, are optimized for uart or remote data applications. control inputs select logic the ncn9252 is made up of two, triple ? throw switches operating off of the same internal enable signal. for each switch, a signal can pass from the common pin to any of three terminals. whenever com1 is closed to terminal 1s2, com2 will respectively be closed to terminal 2s2. the select logic is controlled by two inputs, in1 and in2, connecting the common pins to the terminals according to the function table found on page 2. since there are four possible control states but only 3 possible terminals, the first combination results in a open connection for all three terminals. figure 3. i cc leakage current vs. v in v cc = 2.7 v v cc = 3.3 v v cc = 4.2 v v in (v) 2.8 2.0 1.6 3.2 1.2 0.8 0.4 0 0 10 20 30 50 80 90 100 i cc ( a) 40 60 70 2.4 110 120 130 140 150 160 170 180 190 200 v ih and v il levels
ncn9252 http://onsemi.com 7 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 0.5 1 1.5 2 2.5 v in (v) r on ( ) ? 40 c 85 c 25 c figure 4. on ? resistance vs. input voltage @ v cc = 2.7 v 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 0 0.5 1 1.5 2 2.5 3 v in (v) figure 5. on ? resistance vs. input voltage @ v cc = 3.3 v ? 40 c 85 c 25 c r on ( ) 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 v in (v) figure 6. on ? resistance vs. input voltage @ v cc = 4.2 v ? 40 c 85 c 25 c r on ( ) figure 7. bandwidth vs. frequency ? 7 ? 6 ? 5 ? 4 ? 3 ? 2 ? 1 0 1e06 1e07 1e08 1e09 frequency (hz) bw (db) ? 100 ? 90 ? 80 ? 70 ? 60 ? 50 ? 40 ? 30 ? 20 ? 10 0 10000 100000 1e06 1e07 1e08 1e09 figure 8. cross talk vs. frequency @ 25 c frequency (hz) magnitude (db) 0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 10 100 1000 10000 100000 figure 9. total harmonic distortion vs. frequency frequency (hz) thd (%)
ncn9252 http://onsemi.com 8 figure 10. channel 1s1/2s1 usb2.0 near end eye diagram (v cc = 3.3 v, in1 = 1, in2 = 0, temp = 25 c) figure 11. channel 1s2/2s2 usb2.0 near end eye diagram (v cc = 3.3 v, in1 = 0, in2 = 1, temp = 25 c) figure 12. channel 1s3/2s3 usb2.0 near end eye diagram (v cc = 3.3 v, in1 = 1, in2 = 1, temp = 25 c) figure 13. channel 1s1/2s1 usb2.0 far end eye diagram (v cc = 3.3 v, in1 = 1, in2 = 0, temp = 25 c) figure 14. channel 1s2/2s2 usb2.0 far end eye diagram (v cc = 3.3 v, in1 = 0, in2 = 1, temp = 25 c) figure 15. channel 1s3/2s3 usb2.0 far end eye diagram (v cc = 3.3 v, in1 = 1, in2 = 1, temp = 25 c)
ncn9252 http://onsemi.com 9 package dimensions uqfn12 1.7x2.0, 0.4p case 523ae ? 01 issue a a b a1 0.05 c seating plane note 3 notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters 3. dimension b applies to plated terminal and is measured between 0.15 and 0.30 mm from terminal tip. 4. mold flash allowed on terminals along edge of package. flash 0.03 max on bottom surface of terminals. 5. detail a shows optional construction for terminals. dim min max millimeters a a1 0.40 bsc 0.45 0.55 b d 0.45 0.55 e e l 0.00 0.05 pin 1 reference d a e b 0.10 c 2x 0.10 c 2x 0.05 c c k 7 5 1 11 12x e l 12x 2.00 bsc 0.15 0.25 12x a3 detail b 8x l2 detail b optional construction 0.15 ref l2 k 0.127 ref a3 1.70 bsc top view side view bottom view note 5 l1 detail a detail a b a c c m 0.10 m 0.05 0.32 11x 2.30 0.69 0.40 dimensions: millimeters mounting footprint 1 soldermask defined 0.00 0.03 l1 0.22 2.00 pitch 12x 0.20 ---- *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its of ficers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5773 ? 3850 ncn9252/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your loca l sales representative
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