WAS3157B 5.5, 400mhz bandwidth, spdt analog switch descriptions the WAS3157B is a high performance, single pole double throw (spdt) cmos analog switch for bus switching or audio switching applications. it features high bandwidth up to 400mhz at -3db and low on-resistance (5.5 typ.). the sel pin has overvoltage protection that allows voltages above vcc, up to 7.0v to be present on the pin without damage or disruption of operation of the part, regardless of the operating voltage. the WAS3157B is also featured with smart circuitry to minimize vcc leakage current even when sel control voltage is lower than vcc supply voltage. in other word, there is no need of additional device to shift sel level to be the same as that of vcc in real application. the WAS3157B is available in standard sot-363(sc-70-6l) package. standard product is pb-free and halogen-free. features supply voltage : 2.3 ~ 5.5v on-resistance : 5.5 @ vcc=4.5v -3db bandwidth : 400mhz @ c l =5pf off isolation : -69db @ 10mhz low quiescent current : <1ua break-before-make function esd protection hbm : 8000v mm : 600v small package sot-363 applications cell phones mid other portable equipments sot-363 pin configuration (top view) marking s7 = device code * = month (a~z) order information device package shipping WAS3157B-6/tr sot-363 3000/reel&tape 1 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
pin descriptions pin number symbol descriptions 1 b1 data 1 terminal, normally open 2 gnd ground 3 b0 data 0 terminal, normally closed 4 a common data terminal, connect to b0 or b1 according to sel logic 5 vcc power supply 6 sel switch select pin, digit logic low or high function descriptions logic level (sel pin, pin 6) function l b0 connected to a h b1 connected to a logic diagram and symbol absolute maximum ratings parameter symbol value unit supply voltage range vcc -0.5 ~ 6.5 v data input/output voltage range v b0 , v b1 , v a -0.5 ~ 6.5 v select input voltage range v sel -0.5 ~ 6.5 v continues current i b0 , i b1 , i a 50 ma junction temperature range t j 150 o c lead temperature range t l 260 o c storage temperature range t stg -65 ~ 150 o c thermal resistance r ja 350 o c/w recommend operating ratings parameter symbol value unit supply voltage range vcc 2.3 ~ 4.5 v data input/output voltage range v b0 , v b1 , v a 0.0 ~ vcc v select input voltage range v i 0.0 ~ vcc v operating temperature range t a -40 ~ 85 o c sel b1 b0 a WAS3157B 2 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
electronics characteristics (ta=25 o c, vcc=4.5v, unless otherwise noted) parameter symbol conditions min. typ. max. unit vcc=3.0 4.5v 1.7 v select logic high level v ih vcc=2.3 3.0v 1.4 v vcc=3.0 4.5v 0.6 v select logic low level v il vcc=2.3 3.0v 0.4 v quiescent current i cc i out =0 1.0 ua select input leakage current i sel v sel =0 ~ vcc 0.1 ua off state switch leakage current i off see figure 1 0.1 ua on state switch leakage current i on see figure 2 0.1 ua on-resistance (channel b0 and channel b1) r on vcc=4.5v, v a =4.5v, i out =30ma, see figure 3 5.5 12 on-resistance (channel b0 or channel b1) r on vcc=4.5v, v a =0v, i out =30ma, see figure 3 3.8 7.0 on-resistance (channel b0 or channel b1) r on vcc=3.6v, v a =3.6v, i out =30ma, see figure 3 6.5 13 on-resistance (channel b0 or channel b1) r on vcc=3.6v, v a =0v, i out =30ma, see figure 3 4.5 9.0 propagation delay time (a to bn or bn to a) t plh / t phl c l =50pf see figure 4, 5 0.3 1.2 ns select input to switch on time (a to bn or bn to a) t on c l =50pf see figure 5 80 120 ns select input to switch off time (a to bn or bn to a) t off c l =50pf see figure 5 50 80 ns break-before-make time t bbm generated by design 0.5 ns -3db bandwidth bw r l =50, c l =5pf 400 mhz charge injection qg c l =0.1nf, vcc=5v 10 pc off isolation oirr r l =50, f=10mhz -69 db crosstalk xtalk r l =50, f=10mhz -68 db total harmonic distortion thd r l =600, f=1khz v a =0.5vp-p 0.03 % select pin input capacitance c in vcc=0v 5.5 pf b port off capacitance c off 7.5 pf a port on capacitance c on 18.5 pf WAS3157B 3 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
typical characteristics (ta=25 o c, vcc=4.5v, unless otherwise noted) on-resistance vs. vcc, va voltage bandwidth crosstalk supply current vs. select logic level off isolation eye diagram (480mbps) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 -20 -10 0 10 20 30 40 50 supply current (ua) logic level (v) vcc=3.6v 012345 0 1 2 3 4 5 6 7 8 9 10 vcc=3.6v vcc=4.5v r ds(on) - on-resistance ( ) v a voltage (v) vcc=3.0v WAS3157B 4 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
test circuit figure 1: off state switch leakage current figure 3: on-resistance figure 2: on state switch leakage current figure 4: propagation delay time figure 5: select input to switch on/off time a va b0 or b1 v vo ron=v/io vcc gnd io t on t off sel input b1 output vcc b1 a sel va=vcc b0 cl output cl t on t off b0 output output tplh tphl data input data output vcc b1 a sel b0 cl output cl vil or vih output WAS3157B 5 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
bandwidth (bw) off isolation (oirr) crosstalk (xtalk) vcc b1 a sel b0 rl vil or vih network analyzer WAS3157B 6 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
package outline dimensions sot-363 dimension in millimeters symbol min. max. a 0.900 1.100 a1 0.000 0.100 a2 0.900 1.000 b 0.150 0.350 c 0.080 0.150 d 2.000 2.200 e 1.150 1.350 e1 2.150 2.450 e 0.650 typ e1 1.200 1.400 l 0.525 ref l1 0.260 0.460 0 o 8 o WAS3157B 7 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
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