general description the max4854h/max4854hl analog switches operatefrom a single +2v to +5.5v supply and can handle sig- nals greater than the supply rail. these devices feature four low on-resistance (7 ) single-pole/single-throw (spst) switches, with 27.5pf on-capacitance, makingthem ideal for data signals. if the input signal exceeds the supply rail, the switches become high impedance and prevent the signal from feeding through to the output. the max4854h/max4854hl are available in the space-saving (3mm x 3mm), 16-pin, thin qfn package and operate over the extended (-40? to +85?) tem- perature range. applications usb switchinghigh-bandwidth data switching cellular phones notebook computers pdas and other handheld devices features ? usb 2.0 full speed (12mb) and usb 1.1 signalswitching ? overvoltage protection if signal exceeds v cc ? 150mhz -3db bandwidth ? 27.5pf on-capacitance ? +2v to +5.5v supply range ? 7 on-resistance ? low 10a supply current ? 1.8v logic compatible ? available in a space-saving (3mm x 3mm) 16-pin tqfn package max4854h/max4854hl quad spst, high-bandwidth, signal line protection switch ________________________________________________________________ maxim integrated products 1 top view 16 12 3 4 1211 10 9 15 14 13 5678 com1in1 v cc in4 com4n.c. no4 (nc4) in3 n.c. in2 com2 no2 (nc2) gnd no3 (nc3) com3 no1 (nc1) max4854h max4854hl thin qfn connect exposed paddle to pc board ground. ( ) indicates the max4854hl pin configuration ordering information max4854h max4854hl no1 (nc1) com1in1 no2 (nc2) com2in2 no3 (nc3) com3in3 no4 (nc4) com4in4 max4854h in_ no_ 0 off 1o n switches shownfor logic 0 input max4854hl in_ nc_ 0o n 1 off switches shownfor logic 1 input ( ) indicates the max4854hl 7 7 7 7 block diagram/truth table 19-3376; rev 1; 1/05 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. * ep = exposed paddle. part temp range pin-package top mark max4854hete -40 c to +85 c 16 tqfn-ep* acd MAX4854HLETE -40 c to +85 c 16 tqfn-ep* acx downloaded from: http:///
max4854h/max4854hl quad spst, high-bandwidth, signal line protection switch 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc , in_, com_, no_, nc_ to gnd (note 1) ...........-0.3v to +6.0v closed switch continuous current com_, no_, nc_ .........?0ma peak current com_, no_, nc_ (pulsed at 1ms, 50% duty cycle) ....................................?00ma peak current com_, no_, nc_ (pulsed at 1ms, 10% duty cycle) ....................................?20ma continuous power dissipation (t a = +70 c) 16-pin thin qfn (derate 20.8mw/ c above +70 c) .....1667mw operating temperature range ................................-40 c to +85 c junction temperature ...........................................................+150 c storage temperature range .................................-65 c to +150 c lead temperature (soldering, 10s)......................................+300 c electrical characteristics(v cc = +2.7v to +5.5v, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = +3.0v, t a = +25 c, unless other- wise noted.) (note 2) parameter symbol conditions min typ max units supply voltage v cc 2.0 5.5 v supply current i cc v cc = 5.5v, v in_ = 0v or v cc 10 20 ? analog switch analog signal range v no_ , v com_ 0 v cc v t a = +25 c7 9 on-resistance r on v cc = 3v, i com_ = 10ma, v no_ or v nc_ = 0 to v cc t a = -40 c to +85 c 10 t a = +25 c 0.2 0.4 on-resistance matchbetween channels (notes 3, 4) ? r on v cc = 3v, i com = 10ma, or v no_ or v nc_ = 1.5v t a = -40 c to +85 c 0.5 t a = +25 c 2.5 3.75 on-resistance flatness(note 5) r flat v cc = 3v, i com_ = 10ma, v no_ or v nc_ = 1v, 2v, 3v t a = -40 c to +85 c 4 t a = +25 c- 2 + 2 no_ or nc_ off-leakagecurrent i off v c c = 5.5v , v n o_ or v n c _ = 1v or 4.5v , v c om _ = 4.5v or 1v t a = -40 c to +85 c -10 +10 na t a = +25 c- 2 + 2 com_ on-leakage current i on v cc = 5.5v; v no_ or v nc_ = 1v, 4.5v, or floating; v com_ = 1v, 4.5v, or floating t a = -40 c to +85 c -12.5 +12.5 na dynamic characteristics signal over rail to high-zswitching time v no_ or v nc_ = v cc to (v cc + 0.5v), v cc < 5v (figure 1) 0.5 1 ? high-z to low-z switchingtime v no_ or v nc_ = (v cc + 0.5v) to v cc , v cc < 5v (figure 1) 0.5 1 ? skew (note 3) t skew r s = 39 , c l = 50pf (figure 2) 0.15 1n s propagation delay (note 3) t pd r s = 39 , c l = 50pf (figure 2) 0.9 2 ns t a = +25 c4 0 6 0 turn-on time t on v cc = 3v, v no_ or v nc_ = 1.5v, r l = 300 , c l = 50pf (figure 1) t a = -40 c to +85 c 100 ns t a = +25 c3 0 4 0 turn-off time t off v cc = 3v, v no_ or v nc_ = 1.5v, r l = 300 , c l = 50pf (figure 1) t a = -40 c to +85 c 60 ns note 1: signals on no_/nc_ or com_ exceeding gnd are clamped by internal diodes. signals on in exceeding gnd are clampedby an internal diode. limit the forward-diode current to the maximum current rating. downloaded from: http:///
max4854h/max4854hl quad spst, high-bandwidth, signal line protection switch _______________________________________________________________________________________ 3 electrical characteristics (continued)(v cc = +2.7v to +5.5v, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = +3.0v, t a = +25 c, unless other- wise noted.) (note 2) parameter symbol conditions min typ max units charge injection q v com_ = 1.5v, r s = 0 , c l = 1nf (figure 3) 8 pc off-isolation (note 6) v iso f = 100khz, v com_ = 1v rms , r l = 50 , c l = 5pf (figure 4) -80 db crosstalk v ct f = 1mhz, v com_ = 1v rms , r l = 50 , c l = 5pf (figure 4) -95 db -3db bandwidth bw signal = 0dbm, r l = 50 , c l = 5pf (figure 4) 150 mhz total harmonic distortion thd f = 20hz to 20khz, v com_ = 1v + 2v p-p , r l = 600 0.04 % no_ off-capacitance c off f = 1mhz (figure 5) 12 pf com on-capacitance c on f = 1mhz (figure 5) 27.5 pf digital i/o (in_) v cc = 2v to 3.6v 1.4 input-logic high voltage v ih v cc = 3.6v to 5.5v 1.8 v v cc = 2v to 3.6v 0.5 input-logic low voltage v il v cc = 3.6v to 5.5v 0.8 v input leakage current i in v in_ = 0 or 5.5v -0.5 +0.5 ? typical operating characteristics (v cc = 3.0v, t a = +25 c, unless otherwise noted.) on-resistance vs. com voltage max4854h toc01 com voltage (v) on-resistance ( ) 4 2 5 10 15 20 25 30 35 40 45 0 06 v cc = 1.8v v cc = 2.0v v cc = 2.3v v cc = 2.5v v cc = 3.0v v cc = 5.0v on-resistance vs. com voltage max4854h toc02 com voltage (v) on-resistance ( ) 2.5 2.0 1.5 1.0 0.5 3 4 5 6 7 82 03 . 0 v cc = 3.0v t a = +85 c t a = +25 c t a = -40 c on-resistance vs. com voltage max4854h toc03 com voltage (v) on-resistance ( ) 4 3 1 2 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.51.5 05 v cc = 5.0v t a = +85 c t a = +25 c t a = -40 c note 2: specifications are 100% tested at t a = +85 c only, and guaranteed by design and characterization over the specified temperature range. note 3: guaranteed by design and characterization; not production tested. note 4: ? r on = r on(max) - r on(min) . note 5: flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over thespecified analog signal ranges. note 6: off-isolation = 20log 10 (v com_ / v no_ ), v com_ = output, v no_ = input to off switch. downloaded from: http:///
typical operating characteristics (continued) (v cc = 3.0v, t a = +25 c, unless otherwise noted.) max4854h/max4854hl quad spst, high-bandwidth, signal line protection switch 4 _______________________________________________________________________________________ supply current vs. supply voltage max4854h toc04 supply voltage (v) supply current ( a) 4.5 3.5 2.5 3 4 5 6 72 1.5 5.5 t a = -40 c t a = +25 c t a = +85 c turn-on/turn-off time vs. supply voltage max4854h toc05 supply voltage (v) turn-on/turn-off time (ns) 4.5 3.5 2.5 10 20 30 40 50 60 0 1.5 5.5 t on t off turn-on/turn-off time vs. temperature max4854h toc06 temperature ( c) turn-on/turn-off time (ns) 60 35 10 -15 22 24 26 28 30 32 3420 -40 85 t off t on logic threshold vs. supply voltage max4854h toc07 supply voltage (v) logic threshold (v) 4.5 3.5 2.5 0.8 1.0 1.2 1.4 1.60.6 1.5 5.5 v in rising v in falling charge injection vs. com voltage max4854h toc08 com voltage (v) charge injection (pc) 4 3 2 1 10 20 30 40 0 05 v cc = 3v v cc = 5v leakage current vs. temperature max4854h toc09 temperature ( c) leakage current (na) 60 35 -15 10 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 -40 85 com on-leakage com off-leakage frequency response max4854h toc10 frequency (mhz) frequency response (db) 100 10 1 -80 -60 -40 -20 0 20 -100 0.1 1000 off-response on-response crosstalk total harmonic distortion vs. frequency max4854h toc11 frequency (hz) thd (%) 10k 1k 100 0.1 10 100k 1 0.01 r l = 600 switch entering high-impedance state max4854h toc12 200 s/div v nc 2v/div 0v v com 0v v cc = 3.0v hi-z state hi-z state downloaded from: http:///
max4854h/max4854hl quad spst, high-bandwidth, signal line protection switch _______________________________________________________________________________________ 5 detailed description the max4854h/max4854hl quad spst switches havelow on-resistance, operate from a +2v to +5.5v supply, and are fully specified for nominal 3.0v applications. these devices feature overvoltage protection by putting the switch into high-impedance mode when the switch input exceeds v cc . these switches have low 27.5pf on-channel capaci- tance, which allows for 12mbps switching of the data sig- nals for usb 2.0 full speed/1.1 applications. the max4854h /max4854hl are designed to switch d+ and d- usb signals with a guaranteed skew of less than 1ns(see figure 2) as measured from 50% of the input signal to 50% of the output signal. applications information digital control inputs the logic inputs (in_) accept up to +5.5v even if thesupply voltages are below this level. for example, with a +3.3v v cc supply, in_ can be driven low to gnd and high to +5.5v, allowing for mixing of logic levels in asystem. driving in_ rail-to-rail minimizes power con- sumption. for a +2v supply voltage, the logic thresholds are 0.5v (low) and 1.4v (high); for a +5v supply voltage, the logic thresholds are 0.8v (low) and 1.8v (high). analog signal levels the on-resistance of these switches changes very little for analog input signals across the entire supply volt- age range (see the typical operating characteristics ). the switches are bidirectional, so the no_ and com_pins can be either inputs or outputs. power-supply sequencing caution: do not exceed the absolute maximum ratings because stresses beyond the listed ratings may causepermanent damage to the device. proper power-supply sequencing is recommended for all cmos devices. always apply v cc before applying analog signals, especially if the analog signal is notcurrent limited. pin description pin name function 1, 5, 7, 10 no1, no2, no3, no4 normally open terminals for analog switch (max4854h) 1, 5, 7, 10 nc1, nc2, nc3, nc4 normally closed terminals for analog switch (max4854hl) 2, 11 n.c. no connection. internally not connected. 3 in2 digital control input for analog switch 2. a logic-low (max4854h) or logic-high (max4854hl) on in2 opens switch 2 and a logic-high (max4854h) or logic-low (max4854hl) on in2 connects com2 to no2. 4 com2 common terminal for analog switch 2 6 gnd ground 8 com3 common terminal for analog switch 3 9 in3 digital control input for analog switch 3. a logic-low (max4854h) or logic-high (max4854hl) on in3 opens switch 3 and a logic-high (max4854h) or logic-low (max4854hl) on in3 connects com3 to no3. 12 com4 common terminal for analog switch 4 13 in4 digital control input for analog switch 4. a logic-low (max4854h) or logic-high (max4854hl) on in4 opens switch 4 and a logic-high (max4854h) or logic-low (max4854hl) on in4 connects com4 to no4. 14 v cc supply voltage. bypass v cc to gnd with a 0.01? capacitor as close to the pin as possible. 15 in1 digital control input for analog switch 1. a logic-low (max4854h) or logic-high (max4854hl) on in1 opens switch 1 and a logic-high (max4854h) or logic-low (max4854hl) on in1 connects com1 to no1. 16 com1 common terminal for analog switch 1 ep exposed paddle. connect to pc board ground plane. downloaded from: http:///
max4854h/max4854hl quad spst, high-bandwidth, signal line protection switch 6 _______________________________________________________________________________________ test circuits/timing diagrams t r < 20ns t f < 20ns 50% logic input r l com_ gnd in_ c l includes fixture and stray capacitance. v out = v no ( r l ) r l + r on v no t off 0v no_ 0.9 x v 0ut 0.9 x v out t on v out switch output logic input in depends on switch configuration;input polarity determined by sense of switch. v cc c l v cc v out max4854h v cc 0v switch input normal mode normal mode high-z mode v cc + 0.5v t hiz t hizb figure 1. switching time t skew_i 90% 50% 10% 90% 50% 10% t fi input a input a- t ri t skew_o 90% 50% 10% 90% 50% 10% t fo output b output b- t ro b- c l a- r s a b c l txd+ txd- r s r s = 39 c l = 50pf delay due to switch for rising input and rising output signals. delay due to switch for falling input and falling output signals. change in skew through the switch for output signals. change in skew through the switch for input signals. |t skew_i | |t skew_o | |t fo - t fi | |t ro - t ri | figure 2. output signal skew downloaded from: http:///
max4854h/max4854hl quad spst, high-bandwidth, signal line protection switch _______________________________________________________________________________________ 7 v gen gnd com_ c l v out v cc v out ? v out q = ? v out x c l no_ off off on on off off in_ max4854h in_ max4854hl v il to v ih v cc r gen in_ max4854h figure 3. charge injection measurements are standardized against shorts at ic terminals. off-isolation is measured between com_ and "off" or no_ terminal on each switch. on-loss is measured between com_ and "on" or no_ terminal on each switch. crosstalk is measured from one channel to the other channel. signal direction through switch is reversed; worst values are recorded. +5v v out v cc in_ com1 no1*/ nc1 v in max4854h/ max4854hl off-isolation = 20log v out v in on-loss = 20log v out v in crosstalk = 20log v out v in network analyzer 50 50 50 50 meas ref 10nf 0v or v cc gnd *for crosstalk this pin is no2. com2 is open. figure 4. on-loss, off-isolation, and crosstalk capacitance meter no_ com_ gnd in v il or v ih 10nf v cc f = 1mhz v cc max4854h/ max4854hl figure 5. channel off-/on-capacitance chip information transistor count: 735process: cmos downloaded from: http:///
max4854h/max4854hl quad spst, high-bandwidth, signal line protection switch maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2005 maxim integrated products printed usa is a registered trademark of maxim integrated products. package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .) 12x16l qfn thin.eps 0.10 c 0.08 c 0.10 m c a b d d/2 e/2 e a1 a2 a e2 e2/2 l k e (nd - 1) x e (ne - 1) x e d2 d2/2 b l e l c l e c l l c l c e 1 2 21-0136 package outline12, 16l, thin qfn, 3x3x0.8mm 1. dimensioning & tolerancing conform to asme y14.5m-1994. exposed pad variations 2. all dimensions are in millimeters. angles are in degrees.3. n is the total number of terminals. 4. the terminal #1 identifier and terminal numbering convention shall conform to jesd 95-1 spp-012. details of terminal #1 identifier are optional, but must be located within the zone indicated. the terminal #1 identifier may be either a mold or marked feature. 5. dimension b applies to metallized terminal and is measured between 0.20 mm and 0.25 mm from terminal tip. 6. nd and ne refer to the number of terminals on each d and e side respectively. 7. depopulation is possible in a symmetrical fashion. 8. coplanarity applies to the exposed heat sink slug as well as the terminals. 9. drawing conforms to jedec mo220 revision c. notes: e 2 2 21-0136 package outline12, 16l, thin qfn, 3x3x0.8mm down bonds allowed downloaded from: http:///
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