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_______________general description the max308/max309 precision, monolithic, cmos ana- log multiplexers (muxes) offer low on-resistance (less than 100 ? ), which is matched to within 5 ? between channels and remains flat over the specified analog sig- nal range (7 ? max). they also offer low leakage over temperature (no-off leakage current less than 5na at +85?) and fast switching speeds (transition time less than 250ns). the max308 is a single-ended 1-of-8 device, and the max309 is a differential 2-of-4 device. the max308/max309 are fabricated with maxim? improved 44v silicon-gate process. design improve- ments yield extremely low charge injection (less than 10pc) and guarantee electrostatic discharge protection greater than 2000v. these muxes operate with a single +5v to +30v supply or bipolar ?v to ?0v supplies, while retaining ttl/cmos-logic input compatibility and fast switching. cmos inputs provide reduced input loading. these improved parts are plug-in upgrades for the industry- standard dg408, dg409, dg508a, and dg509a. ________________________applications sample-and-hold circuits automatic test equipment heads-up displays guidance and control systems military radios communications systems battery-operated systems pbx, pabx audio signal routing ____________________________features guaranteed on-resistance match between channels, <5 ? max low on-resistance, <100 ? max guaranteed flat on-resistance over specified signal range, 7 ? max guarateed low charge injection, <10pc no-off leakage current <5na at +85? com-off leakage current <20na at +85? esd protection >2000v plug-in upgrade for industry-standard dg408/dg409/dg508a/dg509a single-supply operation (+5v to +30v) bipolar-supply operation (5v to 20v) low power consumption, <300w rail-to-rail signal handling ttl/cmos-logic compatible ______________ordering information max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers ________________________________________________________________ maxim integrated products 1 cmos decode logic a2 a1 a0 en no8 no7 no6 no5 no4 no3 no2 no1 com v+ v- gnd max308 8-channel single-ended multiplexer 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 a1 a2 gnd v+ no1 v- en a0 top view max308 no5 no6 no7 no8 com no4 no3 no2 dip/so/tssop continued at end of data sheet. _____________________pin configurations/functional diagrams/truth tables 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. 19-0271; rev 2; 8/02 part max308 cpe max308cse max308c/d 0? to +70? 0? to +70? 0? to +70? temp range pin-package 16 plastic dip 16 narrow so dice* ordering information continued at end of data sheet. * contact factory for dice specifications. ** contact factory for availability. max308epe -40? to +85? 16 plastic dip max308ese -40? to +85? 16 narrow so max308eje -40? to +85? 16 cerdip max308mje -55? to +125? 16 cerdip** max308cue 0? to +70? 16 tssop max308eue -40? to +85? 16 tssop
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics dual supplies (v+ = +15v, v- = -15v, gnd = 0v, v ah = +2.4v, v al = +0.8v, t a = t min to t max , unless otherwise noted.) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. voltage referenced to v- v+ ............................................................................-0.3v, 44v gnd .........................................................................-0.3v, 25v digital inputs, no, com (note 1)...........(v- - 2v) to (v+ + 2v) or 30ma, (whichever occurs first) continuous current (any terminal) ......................................30ma peak current, no or com (pulsed at 1ms, 10% duty cycle max) ..........................100ma continuous power dissipation (t a = +70?) plastic dip (derate 10.53mw/? above +70?) ..........842mw narrow so (derate 8.70mw/? above +70?) ............696mw cerdip (derate 10.00mw/? above +70?) ...............800mw tssop (derate 6.7mw/? above +70?) ....................457mw operating temperature ranges max30_c_ _ .......................................................0? to +70? max30_e_ _.....................................................-40? to +85? max30_mje ..................................................-55? to +125? storage temperature range .............................-65? to +150? lead temperature (soldering, 10sec) .............................+300? v com = ?0v, v no = ?0v, sequence each switch on v no = +10v, v com = ?0v, v en = 0v v com = +10v, v no = ?0v, v en = 0v i no = -1.0ma, v com = ?0v i no = -1.0ma, v com = ?0v (note 4) v no = ?0v, v com = +10v, v en = 0v conditions na -10 10 i com(on) com-on leakage current (note 5) -5 5 -0.75 0.02 0.75 -20 20 -10 10 -0.75 0.02 0.75 na -10 10 i com(off) com-off leakage current (note 5) -5 5 -0.75 0.02 0.75 -20 20 60 100 -10 10 -0.75 0.02 0.75 na -5.0 5.0 i no(off) no-off leakage current (note 5) -2.5 2.5 ? 125 r on on-resistance 1.5 5 ? 8 ? r on on-resistance matching between channels units min typ max (note 2) symbol parameter note 1: signals on no, com, en, a0, a1, or a2 exceeding v+ or v- are clamped by internal diodes. limit forward current to maximum current ratings. v -15 15 v no , v com analog signal range i no = -1.0ma, v com = ?v or 0v 1.8 7 ? 10 r flat on-resistance flatness (note 3) t a = +25? t a = t min to t max t a = +25? t a = t min to t max t a = +25? t a = t min to t max -0.5 0.01 0.5 t a = +25? t a = t min to t max t a = +25? t a = t min to t max t a = +25? t a = t min to t max t a = +25? t a = t min to t max t a = +25? t a = t min to t max max309 max308 max309 max308 c, e m c, e m c, e m c, e m c, e m switch
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers _______________________________________________________________________________________ 3 electrical characteristics dual supplies (continued) (v+ = +15v, v- = -15v, gnd = 0v, v ah = +2.4v, v al = +0.8v, t a = t min to t max , unless otherwise noted.) off isolation (note 6) db -75 v iso 210 q charge injection (note 3) ns 300 150 t off(en) enable turn-off time ns 225 t on(en) enable turn-on time 85 150 ns 10 40 t open break-before-make interval 85 175 ? -1.0 1.0 i al input current with input voltage low ? -1.0 1.0 i ah input current with input voltage high ? -10 10 i- negative supply current -1 1 ma i+ positive supply current 0.075 0.5 v ? ?0 power-supply range 16 30 ? 75 units min typ max (note 2) symbol parameter crosstalk between channels v ct -92 db logic input capacitance c in 8 pf no-off capacitance c no(off) 3 pf 26 com-off capacitance c com(off) f = 1mhz, v en = 0.8v v com = 0v, figure 8 14 pf 37 com-on capacitance c com(on) f = 1mhz, v en = 2.4v v com = 0v, figure 8 25 pf t a = +25? v en = 0v or 2.4v, v a = 0v t a = +25? v a = 2.4v or 15v t a = t min to t max t a = +25? t a = t min to t max t a = t min to t max t a = +25? t a = +25? t a = +25? t a = t min to t max t a = +25? t a = +25? t a = +25? t a = t min to t max conditions t a = +25? t a = +25? t a = +25? t a = +25? t a = +25? v en = 0v, r l = 1k ? , f = 100khz, figure 6 c l = 1.0nf, v no = 0v, r s = 0 ? , figure 5 figure 3 figure 3 v en = 2.4v, v a(all) = 0v or 2.4v figure 4 v en = 2.4v, v a(all) = 0v or 2.4v v en = v a = 0v or 4.5v v en = 2.4v, f = 100khz, v gen = 1v p-p , r l = 1k ? , figure 7 f = 1mhz f = 1mhz, v en = v no = 0v, figure 8 max308 max309 max308 max309 ns 250 t trans transistion time t a = t min to t max figure 2 input supply dynamic pc
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers 4 _______________________________________________________________________________________ (note 3) conditions c l = 1.0nf, v no = 0v, r s = 0 ? v inh = 2.4v, v inl = 0v, v no1 = 5v, figure 3 v inh = 2.4v, v inl = 0v, v no1 = 5v, figure 3 v no1 = 8v, v no8 = 0v, v in = 2.4v, figure 2 i no = -1.0ma v com = 3v or 10v pc 210 q charge injection (note 3) ns 75 300 t off(en) enable turn-off time (note 3) v 012 v no , v com analog signal range ns 100 600 t on(en) enable turn-on time (note 3) ns 115 450 t trans transition time (note 3) ? 120 175 r on on-resistance units min typ max (note 2) symbol parameter electrical characteristics single supply (v+ = +12v, v- = 0v, gnd = 0v, v ah = +2.4v, v al = +0.8v, t a = t min to t max , unless otherwise noted.) note 2: the algebraic convention where the most negative value is a minimum and the most positive value a maximum is used in this data sheet. note 3: guaranteed by design. note 4: ? r on = r on(max) - r on(min) . on-resistance match between channels and flatness are guaranteed only with specified voltages. flatness is defined as the difference between the maximum and minimum value of on-resistance as measured at the extremes of the specified analog signal range. note 5: leakage parameters are 100% tested at the maximum rated hot temperature and guaranteed by correlation at +25?. note 6: off isolation = 20log v com /v no , where v com = output and v no = input to off switch. t a = +25? t a = +25? t a = +25? t a = +25? t a = +25? switch dynamic
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers _______________________________________________________________________________________ 5 120 140 160 on-resistance vs. v com (dual supplies) 100 max308/9 toc-01 0 20 40 60 -20 20 -15 15 -10 10 -5 5 0 80 v com ( v ) ?v ?0v ?5v ?0v r on ( ? ) 120 on-resistance vs. v com and temperature (dual supplies) 100 max308/9 toc-02 0 20 40 60 -15 15 -10 10 -5 5 0 80 v com (v) +125? +85? +25? -55? r on ( ? ) v+ = +15v v- = -15v 280 320 360 400 on-resistance vs. v com (single supply) 240 max308/9 toc-03 40 80 120 160 15 20 10 5 0 200 v com (v) r on ( ? ) 5v 10v 15v 20v 120 140 160 on-resistance vs. v com and temperature (single supply) 100 max308/9 toc-04 0 20 40 60 15 10 5 0 80 v com (v) r on ( ? ) +125 c +85 c +25 c -55 c v+ = 15v v- = 0v 30 charge injection vs. v com 20 max308/9 toc-07 -30 -20 -10 0 -15 15 -10 10 -5 5 0 10 v com ( v ) q j (pc) v+ = 12v v- = 0v v+ = +15v v- = -15v 10 0.0001 -55 125 off leakage vs. temperature 1 max308/9 toc-05 temperature ( c) off leakage (na) 25 0.01 0.001 -35 -15 65 0.1 100 1000 45 85 105 5 i no (off) i com (on) v+ = 15v v- = -15v 10 0.0001 -55 125 on leakage vs. temperature 1 max308/9 toc-05 temperature ( c) on leakage (na) 25 0.01 0.001 -35 -15 65 0.1 100 1000 45 85 105 5 i com (on) v+ = 15v v- = -15v 100 0.001 -55 125 supply current vs. temperature 10 max4308/9-toc8 temperature ( c ) i+, i- (a) 25 0.1 0.01 -35 -15 65 1 45 85 105 5 i+ i- v+ = +15v v- = -15v v en = v a = 0v, 4.5v __________________________________________typical operating characteristics (t a = +25?, unless otherwise noted.)
__________applications information operation with supply voltages other than 15v using supply voltages less than ?5v will reduce the analog signal range. the max308/max309 switches operate with ?v to ?0v bipolar supplies or with a +5v to +30v single supply. connect v- to gnd when operating with a single supply. both device types can also operate with unbalanced supplies, such as +24v and -5v. the typical operating characteristics graphs show typical on-resistance with 20v, 15v, 10v, and 5v supplies. (switching times increase by a factor of two or more for operation at 5v.) overvoltage protection proper power-supply sequencing is recommended for all cmos devices. do not exceed the absolute maxi- mum ratings, because stresses beyond the listed rat- ings may cause permanent damage to the devices. always sequence v+ on first, then v-, followed by the logic inputs, no, or com. if power-supply sequencing is not possible, add two small signal diodes in series with supply pins for overvoltage protection (figure 1). adding diodes reduces the analog signal range to 1v below v+ and 1v above v-, but does not affect the devices?low switch resistance and low leakage charac- teristics. device operation is unchanged, and the differ- ence between v+ and v- should not exceed +44v. max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers 6 _______________________________________________________________________________________ ______________________________________________________________pin description v g no com v- v+ figure 1. overvoltage protection using external blocking diodes pin max308 max309 name function 1, 15, 16 a0, a2, a1 address inputs a0, a1 address inputs 2 2 en enable input 3 3 v- negative supply voltage input 4? no1?o4 analog inputs?idirectional 4? no1a?o4a analog inputs?idirectional 8 com analog output?idirectional 8, 9 coma, comb analog outputs?idirectional 9?2 no8?o5 analog inputs?idirectional 10?3 no4b?o1b analog inputs?idirectional 13 14 v+ positive supply voltage input 14 15 gnd ground 1, 16
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers _______________________________________________________________________________________ 7 ______________________________________________test circuits/timing diagrams 50% t trans tr < 20ns t f < 20ns v out +3v 0v v no1 0v v no8 logic input switch output +15v v out -15v gnd v+ a1 v- a2 a0 en no1 no2-no7 no8 com 10v +10v 50 ? max308 300 ? 35pf +15v v out -15v gnd v+ a0 v- a1 en no1b no1a-no4a no4b comb 10v 50 ? max309 300 ? 35pf 90% 90% t trans on +10v 50% t off(en) tr < 20ns t f < 20ns v out +3v 0v 0v logic input switch output +15v v out -15v gnd v+ a1 v- a0 a2 en no1 no2-no8 com -5v 50 ? max308 1k 35pf 90% 10% t on(en) +15v v out -15v gnd v+ a1 v- a0 en no1b no1a-no4a no2b-no4b, coma comb -5v 50 ? max309 1k 35pf figure 2. transition time figure 3. enable switching time
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers 8 _______________________________________________________________________________________ 50% t open tr < 20ns t f < 20ns v out +3v 0v logic input switch output +15v v out -15v gnd v+ a0 v- a1 a2 en no1-no8 com +5v 50 ? max308 300 ? 35pf 80% +2.4v 0v ? v out +3v 0v logic input +15v v out -15v gnd v+ a1 v- a0 a2 en com max308 c l = 1000nf v out no channel select r s v s on off off ? v out is the measured voltage due to charge transfer error q when the channel turns off. q = c l = ? v out _________________________________test circuits/timing diagrams (continued) figure 4. break-before-make interval figure 5. charge injection
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers _______________________________________________________________________________________ 9 +15v v out -15v gnd v+ a1 v- a0 a2 no8 com max308 no1 r s = 50 ? v in en 10nf r l = 1k ? off isolation = 20log v out v in 10nf +15v v out -15v gnd v+ a1 v- a0 a2 no8 com max308 no2 r s = 50 ? v in en 10nf r l = 1k ? crosstalk = 20log v out v in 10nf no1 +15v -15v gnd v+ a2 v- a1 a0 no8 max308 channel select no1 com en meter impedance analyzer or equivalent f = 1mhz _________________________________test circuits/timing diagrams (continued) figure 6. off isolation figure 7. crosstalk figure 8. no/com capacitance
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers 10 ______________________________________________________________________________________ ________pin configurations/functional diagrams/truth tables (continued) 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 a1 gnd v+ no1b no1a v- en a0 top view max309 no2b no3b n04b comb coma no4a no3a no2a dip/so/tssop cmos decode logic a1 a0 en no4b no3b no2b no1b no4a no3a no2a no1a coma v+ v- gnd comb max309 4-channel differential multiplexer a2 a1 a0 en on switch x 0 0 0 0 1 1 1 1 x 0 0 1 1 0 0 1 1 x 0 1 0 1 0 1 0 1 0 1 1 1 1 1 1 1 1 none 1 2 3 4 5 6 7 8 max308 logic 0 v al 0.8v, logic 1 v ah 2.4v a1 a0 en on switch x 0 0 1 1 x 0 1 0 1 0 1 1 1 1 none 1 2 3 4 max309 logic 0 v al 0.8v, logic 1 v ah 2.4v
max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers ______________________________________________________________________________________ 11 _ordering information (continued) * contact factory for dice specifications. ** contact factory for availability. 16 cerdip** -55? to +125? max309mje 16 cerdip -40? to +85? max309eje 16 narrow so -40? to +85? max309ese 16 plastic dip -40? to +85? max309epe dice* 16 narrow so 16 plastic dip pin-package temp range 0? to +70? 0? to +70? 0? to +70? max309c/d max309cse max309 cpe part 16 tssop 0? to +70? max309cue 16 tssop -40? to +85? MAX309EUE package information for the latest package outline information, go to www.maxim-ic.com/packages .
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 12 __________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 2002 maxim integrated products printed usa is a registered trademark of maxim integrated products. max308/max309 precision, 8-channel/dual 4-channel, high-performance, cmos analog multiplexers __________________________________________________________chip topographies v+ no3 en no4 0.136 (3.45mm) 0.080" (2.03mm) com no8 no7 no5 no6 n.c. a0 a1 a2 gnd no2 no1 n.c. v- v+ no3a en no4a 0.136 (3.45mm) 0.080" (2.03mm) coma comb no4b no1b no2b no3b a0 a1 n.c. gnd no2a no1a n.c. v- transistor count: 122 substrate connected to v+ transistor count: 122 substrate connected to v+ max308 max309 n.c. = no internal connection

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