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not recommended for new designs the max909 was manufactured for maxim by an outside wafer foundry using a process that is no longer available. it is not recommended for new designs. a maxim replacement or an industry second-source may be available. the data sheet remains available for existing users. the other parts on the follo wing data sheet are not affected. for further information, please see the quickview data sheet for this part or contact technical support for assistance.
max907/max908/max909 dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators ________________________________________________________________ maxim integrated products 1 1 2 3 4 8 7 6 5 v+ outb inb- inb+ gnd ina+ ina- outa max907 dip/so top view 1 2 3 4 14 13 12 11 outd ind- ind+ gnd v+ ina+ ina- outa max908 dip/so 5 6 7 10 9 8 inc+ inc- outc outb inb- inb+ pin configurations 19-0129; rev 7; 1/06 general description the max907/max908/max909 are dual/quad/single, high-speed, ultra-low-power voltage comparators designed for use in systems powered from a single +5v supply; the max909 also accepts dual ?v sup- plies. their 40ns propagation delay (with 5mv input overdrive) is achieved with a power consumption of only 3.5mw per comparator. the wide input common- mode range extends from 200mv below ground (below the negative supply rail for the max909) to within 1.5v of the positive supply rail. because they are micropower, high-speed compara- tors that operate from a single +5v supply and include built-in hysteresis, these devices replace a variety of older comparators in a wide range of applications. max907/max908/max909 outputs are ttl-compatible, requiring no external pullup circuitry. all inputs and out- puts can be continuously shorted to either supply rail without damage. these easy-to-use comparators incor- porate internal hysteresis to ensure clean output switch- ing even when the devices are driven by a slow-moving input signal. the max909 features complementary outputs and an output latch. a separate supply pin for extending the analog input range down to -5v is also provided. the dual max907 and single max909 are available in 8-pin dip and so packages, and the quad max908 is available in 14-pin dip and so packages. these com- parators are ideal for single +5v-supply applications that require the combination of high speed, precision, and ultra-low power dissipation. applications battery-powered systems high-speed a/d converters high-speed v/f converters line receivers threshold detectors/discriminators high-speed sampling circuits zero-crossing detectors features ? 40ns propagation delay ? 700a (3.5mw) supply current per comparator ? single 4.5v to 5.5v supply operation (or 5v, max909 only) ? wide input range includes ground (or -5v, max909 only) ? low, 500v offset voltage ? internal hysteresis provides clean switching ? ttl-compatible outputs (complementary on max909) ? input and output short-circuit protection ? internal latch (max909 only) ordering information ordering information continued at end of data sheet. * go to www.maxim-ic.com/pr-1 for details on high-reliability plastic processing. pin configurations continued at end of data sheet. 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. part 8so -40? to +85? -40? to +85? max907esa 8 plastic dip max907epa 8so 0? to +70? max907csa 8 plastic dip 0? to +70? max907 cpa pin-package temp range 8so -55? to +125? max907msa/pr*
max907/max908/max909 dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators 2 _______________________________________________________________________________________ positive supply voltage (v+ to gnd) ........................+6v negative supply voltage (v- to gnd, max909 only) .........-7v differential input voltage max907/max908 .......................... -0.3v to (v+ + 0.3v) max909 .............................. (v- - 0.3v) to (v+ + 0.3v) common-mode input voltage max907/max908 .......................... -0.3v to (v+ + 0.3v) max909 .............................. (v- - 0.3v) to (v+ + 0.3v) latch input voltage (max909 only) ......... -0.3v to (v+ + 0.3v) input/output short-circuit duration to v+ or gnd . . . continuous continuous power dissipation (t a = +70?) 8-pin plastic dip (derate 9.09mw/? above +70?) . . . 727mw 8-pin so (derate 5.88mw/? above +70?) ........... 471mw 14-pin plastic dip (derate 10.00mw/? above +70?) . . . 800mw 14-pin so (derate 8.33mw/? above +70?) .......... 667mw operating temperature ranges: max90_c_ _ ......................................0c to +70c max90_e_ _ ...................................-40c to +85c max907msa/pr ..............................-55c to +125? storage temperature range ...................-65c to +150? lead temperature (soldering, 10s) ...................... +300? electrical characteristics (v+ = 5v, t a = +25? ; max909 only: v- = 0v, v latch = 0v; 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. absolute maximum ratings max909 only: v- = -5v v v out = 2.4v to 0.4v, c l = 10pf v out = 0.4v to 2.4v, c l = 10pf max907/max908 (notes 3, 4) max909 max909 max907/max908 max907/max908/max909 symbol ns 6 t f output fall time ns 12 t r output rise time 610 mw 3.5 5.5 (note 8) pd power dissipation per comparator ? 60 100 max909 only: v- = -5v i- negative supply current 1.2 1.8 ma 0.7 1.0 (note 7) i+ positive supply current per comparator 0.4 i sink = 8ma 0.36 0.475 i sink = 3.2ma v ol output low voltage v 3.0 3.5 i source = 100? v oh output high voltage ?/v 50 200 (notes 4, 6) psrr power-supply rejection ratio ?/v 50 150 (notes 4, 5) cmrr common-mode rejection ratio -5.2 v+ - 1.5 v -0.2 v+ - 1.5 v cmr input voltage range na 25 50 v cm = 0v, v in = v os i os input offset current na 100 300 v cm = 0v, v in = v os i b input bias current mv 0.5 2.0 (note 2) v os input offset voltage mv -2 -4 (note 1) v trip- negative trip point mv 24 (note 1) v trip+ positive trip point units min typ max conditions parameter
max907/max908/max909 dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators _______________________________________________________________________________________ 3 electrical characteristics (continued) (v+ = 5v, t a = +25? ; max909 only: v- = 0v, v latch = 0v; unless otherwise noted.) parameter symbol conditions min typ max units propagation delay t pd+, t pd- 40 50 ns differential propagation delay ? t pd 1 ns propagation delay skew t pd skew 2 ns latch input voltage high v ih (note 12) 2.0 v latch input voltage low v il (note 12) 0.8 v latch input current i ih , i il (note 12) 20 ? latch setup time t s (note 12) 2 ns latch hold time t h (note 12) 2 ns v in = 100mv, v od = 5mv (note 9) v in = 100mv, v od = 5mv (note 10) max909 only: v in = 100mv, v od = 5mv (note 11) electrical characteristics (v+ = 5v, t a = t min to t max ; max909 only: v- = 0v, v latch = 0v; unless otherwise noted.) parameter symbol conditions min typ max units positive trip point v trip+ (note 1) 2 5 mv negative trip point v trip- (note 1) -2 -5 mv input offset voltage v os (note 2) 1 3.5 mv input bias current i b v cm = 0v, v in = v os 200 500 na input offset current i os v cm = 0v , v in = v os 50 100 na max907/max908/max909 -0.2 v+ - 1.5 c/e temp. ranges (notes 3, 4) max909 only, v- = -5v -5.2 v+ - 1.5 input voltage range v cmr m temp. range (notes 3, 4) max907msa/pr -0.1 v+ - 1.5 v common-mode rejection ratio cmrr (notes 4, 5) 75 300 ?/v power-supply rejection ratio psrr (notes 4, 6) 75 400 ?/v output high voltage v oh i source = 100? 2.8 3.5 v t a = t max 0.45 t min = 0? 0.525 output low voltage v ol i sink = 3.2ma t min = - 40? 0.550 v max907/max908 0.8 1.2 positive supply current per comparator i+ (note 7) max909 1.2 2.0 ma negative supply current i- max909 only; v- = -5v 100 200 ? max907/max908 4 7 power dissipation per comparator pd (note 8) max909 6 11 mw
max907/max908/max909 dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators 4 _______________________________________________________________________________________ note 1: trip point is defined as the input voltage required to make the comparator output change state. the difference between upper (v trip +) and lower (v trip -) trip points is equal to the width of the input-referred hysteresis zone (v hyst ). specified for an input common-mode voltage (v cm ) of 0v (see figure 1). note 2: input offset voltage is defined as the center of the input-referred hysteresis zone. specified for v cm = 0v (see figure 1). note 3: inferred from the cmrr test. note that a correct logic result is obtained at the output, provided that at least one input is within the v cmr limits. note also that either or both inputs can be driven to the upper or lower absolute maximum limit with- out damage to the part. note 4: tested with v+ = 5.5v (and v- = 0v for max909). max909 also tested over the full analog input range (i.e., with v- = -5.5v). note 5: tested over the full input voltage range (v cmr ). note 6: specified over the full tolerance of operating supply voltage: max907/max908 tested with 4.5v < v+ < 5.5v. max909 tested with 4.5v < v+ < 5.5v and with -5.5v < v- < 0v. note 7: positive supply current specified with the worst-case condition of all outputs at logic low (max907/max908), and with v+ = 5.5v. note 8: typical power specified with v+ = 5v; maximum with v+ = 5.5v (and with v- = -5.5v for max909). note 9: due to difficulties in measuring propagation delay with 5mv of overdrive in automatic test equipment, this parameter is guaranteed by design for the max907 and max908. correlation tests show that the specification can be guaranteed if all other dc parameters are within the specified limits. v os must be added to the overdrive voltage for low values of overdrive. for the max909, propagation delay is typical only and there is no guaranteed maximum limit. note 10: differential propagation delay is specified as the difference between any two channels in the max907/max908 (both out- puts making either a low-to-high or a high-to-low transition). note 11: propagation delay skew is specified as the difference between any single channel? output low-to-high transition (t pd +) and high-to-low transition (t pd -), and also between the qout and q out transition on the max909. note 12: latch specifications apply to max909 only (see figure 2). electrical characteristics (continued) (v+ = 5v, t a = t min to t max ; max909 only: v- = 0v, v latch = 0v; unless otherwise noted.) parameter symbol conditions min typ max units propagation delay t pd+, t pd- v in = 100mv, v od = 5mv (note 9) 45 70 ns differential propagation delay ? t pd v in = 100mv, v od = 5mv (note 10) 2 ns propagation delay skew t pd skew max909 only: v in = 100mv, v od = 5mv (note 11) 4 ns latch input voltage high v ih (note 12) 2.0 v latch hold time t h (note 12) 4 ns latch input voltage low v il (note 12) 0.8 v latch input current i ih , i il (note 12) 20 ? latch setup time t s (note 12) 4 ns
max907/max908/max909 dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators _________________________________________________________________________________________________ 5 50 10 110 100 propagation delay vs. input overdrive input overdrive (mv) propagation delay (ns) 30 40 20 t pd + t pd - r s = 10 ? c load = 15pf max907 toc01 80 0 10 100 10k propagation delay vs. source impedance 20 source impedance ( ? ) propagation delay (ns) 40 60 1k v od = 5mv c load = 15pf t pd + t pd - max907 toc2 70 30 0 120 propagation delay vs. capacitive load 40 capacitive load (pf) propagation delay (ns) 80 50 20 60 100 60 40 v od = 5mv r s = 10 ? t pd + t pd - max907 toc03 70 30 -60 -20 60 140 propagation delay vs. temperature 40 60 temperature ( c) propagation delay (ns) 20 100 50 -40 0 80 40 120 v od = 5mv r s = 10 ? c load = 15pf t pd + t pd - max907 toc04 5.0 3.0 11 0 1000 output high voltage vs. source current 3.5 i source ( a) v oh (v) 4.0 4.5 100 v in = 100mv t a = -55 c t a = +125 c t a = +25 c max907 toc05 t ypical operating characteristics (v+ = 5v, t a = +25?, unless otherwise noted.) 0.5 0.1 012 output low voltage vs. sink current 0.2 i sink (ma) v ol (v) 8 0.3 2610 0.4 4 v in = 100mv t a = -55 c t a = +125 c t a = +25 c max907 toc06 2.0 0 28 max907 total positive supply current vs. positive supply voltage (outputs at v ol ) 0.5 v cc (v) total i cc (ma) 6 1.0 357 1.5 4 t a = -55 c t a = +125 c t a = +25 c max907 toc07 2.0 0 28 max907 total positive supply current vs. positive supply voltage (outputs at v oh ) 0.5 v cc (v) total i cc (ma) 6 1.0 357 1.5 4 t a = -55 c t a = +125 c t a = +25 c max907 toc08 4.0 0 28 max908 total positive supply current vs. positive supply voltage (outputs at v ol ) 1.0 v cc (v) total i cc (ma) 6 2.0 357 3.0 4 t a = -55 c t a = +125 c t a = +25 c max907 toc09
max907/max908/max909 dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators 6 ________________________________________________________________________________________________ t ypical operating characteristics (continued) (v+ = 5v, t a = +25?, unless otherwise noted.) 4.0 0 28 max908 total positive supply current vs. positive supply voltage (outputs at v oh ) 1.0 v cc (v) total i cc (ma) 6 2.0 357 3.0 4 t a = -55 c t a = +125 c t a = +25 c max907 toc10 0.5 -0.5 -60 -20 60 140 input offset voltage vs. temperature temperature ( c) v os (mv) 20 100 0 -40 0 80 40 120 v out = 1.4v v cm = 0v max907 toc16 4 -4 -60 -20 60 140 trip point vs. temperature -2 2 temperature ( c) v os (mv) 20 100 0 -40 0 80 40 120 v cm = 0v v trip+ v trip- max907 toc18 5 -1 -60 -20 60 140 input voltage range vs. temperature 0 4 temperature ( c) input voltage range (v) 20 100 -40 0 80 40 120 v cmr- v cmr+ max907 toc13 2.0 0 23 5 8 max909 positive supply current vs. positive supply voltage v+ (v) total i+ (ma) 46 1.0 7 v- = -5v t a = +125 c t a = +25 c t a = -55 c max907 toc11 300 100 -60 -20 60 140 input bias current vs. temperature temperature ( c) input current (na) 20 100 200 -40 0 80 40 120 v cm = 0v v in = v os max907 toc17 60 0 -60 -20 60 140 short-circuit output current vs. temperature temperature ( c) short-circuit output current (ma) 20 100 30 -40 0 80 40 120 output shorted to v+ (sinking) output shorted to gnd (sourcing) max907 toc15 200 0 0-1 -3 -6 max909 negative supply current vs. negative supply voltage v- (v) total i- ( a) -2 -4 100 -5 -7 v+ = +5v t a = +125 c t a = +25 c t a = -55 c max907 toc12 5 -6 -60 -20 60 140 max909 input voltage range vs. temperature -5 4 temperature ( c) input voltage range (v) 20 100 v cmr + v cmr - v+ = +5v v- = -5v -40 40 120 080 max907 toc14
max907/max908/max909 dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators _________________________________________________________________________________________________ 7 max907/max908 propagation delay (t pd +) (5mv overdrive) input 20mv/div ttl threshold (1.4v) output gnd 10ns/div t pd + 5mv overdrive output 500mv/div input gnd max907 toc19 max907/max908 propagation delay (t pd -) (5mv overdrive) input 20mv/div output 500mv/div output gnd 10ns/div t pd - -5mv overdrive ttl threshold (1.4v) input gnd max907 toc20 1v/div response to 10mhz sine wave 20mv p-p 10mhz sine wave input comparator output 50ns/div gnd max907 toc23 max909 propagation delay (t pd +) (5mv overdrive) input 20mv/div output gnd 5mv overdrive input gnd qout 1v/div qout 10ns/div t pd + t pd skew 1.4v max907 toc21 1.4v max909 propagation delay (t pd -) (5mv overdrive) input 20mv/div output gnd input gnd -5mv overdrive qout 1v/div qout 10ns/div t pd - t pd skew max907 toc22 t ypical operating characteristics (continued) (v+ = 5v, t a = +25?, unless otherwise noted.)
max907/max908/max909 detailed description timing noise or undesired parasitic ac feedback cause most high-speed comparators to oscillate in the linear region (i.e., when the voltage on one input is at or near the voltage on the other input). the max907/max908/ max909 eliminate this problem by incorporating inter- nal hysteresis. when the two comparator input voltages are equal, hysteresis effectively causes one comparator input voltage to move quickly past the other, thus taking the input out of the region where oscillation occurs. standard comparators require that hysteresis be added through the use of external resistors. the max907/max908/max909? fixed internal hysteresis eliminates these resistors (and the equations required to determine appropriate values). adding hysteresis to a comparator creates two trip points: one for the input voltage rising and one for the input voltage falling (figure 1). the difference between these two input-referred trip points is the hysteresis. figure 1 illustrates the case where in- is fixed and in+ is varied. if the inputs were reversed, the figure would look the same, except the output would be inverted. the max909 includes an internal latch, allowing the result of a comparison to be stored. if le is low, the latch is transparent (i.e., the comparator operates as though the latch is not present). the state of the com- parator output is stored when le is high (figure 2). note that the max909 can be operated with v- con- nected to ground or to a negative supply voltage. the max909? input range extends from (v- - 0.2v) to (v+ - 1.5v). dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators 8 _______________________________________________________________________________________ pin description the latch is transparent when le is low. the comparator output is stored when le is high. inverted comparator output q out 8 comparator output qout 7 le 5 negative supply or ground v- 4 inverting input in- 3 noninverting input in+ 2 comparator d output outd 14 comparator d inverting input ind- 13 comparator d noninverting input ind+ 12 comparator c noninverting input inc+ 10 comparator c inverting input inc- 9 comparator c output outc 8 positive supply v+ 1 4 8 comparator b output outb 7 7 comparator b inverting input inb- 6 6 comparator b noninverting input inb+ 5 5 ground gnd 6 11 4 comparator a noninverting input ina+ 3 3 comparator a inverting input ina- 2 2 comparator a output outa 1 1 max909 max908 max907 function name pin
applications information circuit layout because of the max907/max908/max909? high gain bandwidth, special precautions must be taken to real- ize the full high-speed capability. a printed circuit board with a good, low-inductance ground plane is mandatory. place the decoupling capacitor (a 0.1? ceramic capacitor is a good choice) as close to v+ as possible. pay close attention to the decoupling capaci- tor? bandwidth, keeping leads short. short lead lengths on the inputs and outputs are also essential to avoid unwanted parasitic feedback around the com- parators. solder the device directly to the printed circuit board instead of using a socket. overdriving the inputs the inputs to the max907/max908/max909 may be driven beyond the voltage limits given in the absolute maximum ratings , as long as the current flowing into the device is limited to 25ma. however, if the inputs are overdriven, the output may be inverted. the addition of an external diode prevents this inversion by limiting the input voltage to 200mv to 300mv below ground (figure 3). battery-operated infrared data link figure 4's circuit allows reception of infrared data. the max403 converts the photodiode current to a voltage, and the max907 determines whether the amplifier output is high enough to be called a ?? the current consump- tion of this circuit is minimal: the max403 and max907 require typically 250? and 700?, respectively. max907/max908/max909 dual/quad/single, high-speed, ultra-low-power, single-supply ttl comparators _______________________________________________________________________________________ 9 v trip+ v hyst v trip- v in+ comparator output v oh v ol v trip+ + v trip- 2 v os = v in- = 0v figure 1. input and output waveforms, noninverting input varied t pd + t skew v in v od t h t s 3v 1.4v 0v v os v oh 1.4v v ol v oh 1.4v v ol compare latch le differential input voltage output (qout) output ( q out) figure 2. max909 timing diagram
max907/max908/max909 single/dual/quad, high-speed, ultra-low-power, single-supply ttl comparators 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. 10 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2006 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. v clamp = -200mv to -300mv i src v- 1/2 max907 figure 3. schottky clamp for input driven below ground 10pf 1m ? +5v 6 7 +5v 0.1 f data 2 3 4 100k ? siemens bp-104 photodiode 100k ? +5v 1000pf 1000pf 47k ? 2 3 0.1 f 4 8 1 max907 max403 figure 4. battery-operated infrared data link consumes only 1ma pin configurations (continued) ordering information (continued) 1 2 3 4 8 7 6 5 qout qout gnd le v- in- in+ v+ max909 dip/so top view part temp range pin-package max908 cpd 0? to +70? 14 plastic dip max908csd 0? to +70? 14 so max908epd -40? to +85? 14 plastic dip max908esd -40? to +85? 14 so max909 cpa 0? to +70? 8 plastic dip max909csa 0? to +70? 8 so MAX909EPA -40? to +85? 8 plastic dip max909esa -40? to +85? 8 so chip information max907 transistor count: 262 max908 transistor count: 536 max909 transistor count: 140 process: bipolar

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