lp239, lp339, lp2901 low-power quad differential comparators slcs004a october 1987 revised may 1988 1 post office box 655303 ? dallas, texas 75265 ultralow power supply current drain ...60 m a typ low input biasing curren t...3 na low input offset curren t... 0.5 na low input offset voltage . . . 2 mv common-mode input voltage includes ground output voltage compatible with mos and cmos logic high output sink-current capability (30 ma at v o = 2v) power supply input reverse-voltage protected single-power-supply operation pin-for-pin compatible with lm239, lm339, lm2901 description the lp239, lp339, lp2901 are low-power quadruple differential comparators. each device consists of four independent voltage comparators designed specifically to operate from a single power supply and typically to draw 60- m a drain current over a wide range of voltages. operation from split power supplies is also possible and the ultralow power supply drain current is independent of the power supply voltage. applications include limit comparators, simple analog-to-digital converters, pulse generators, squarewave generators, time delay generators, voltage controlled oscillators, multivibrators, and high-voltage logic gates. the lp239, lp339, lp2901 were specifically designed to interface with the cmos logic family. the ultralow power supply current makes these products desirable in battery-powered applications. the lp239 is characterized for operation from 25 c to 85 c. the lp339 is characterized for operation from 0 c to 70 c. the lp2901 is characterized for operation from 40 c to 85 c. available options package t a v io max at 25 c small outline plastic dip ceramic dip (d) (n) (j) 0 c to 70 c 5 mv lp339d lp339n lp339j 25 c to 85 c 5 mv lp239d lp239n LP239J 40 c to 85 c 5 mv lp2901d lp2901n lp2901j the d package is available taped-and-reeled. add r suffix to device type when ordering (e.g., lp339dr). copyright ? 1988, texas instruments incorporated production data information is current as of publication date. products conform to specifications per the terms of texas instruments standard warranty. production processing does not necessarily include testing of all parameters. 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1out 2out v cc 2in 2in + 1in 1in + 3out 4out gnd 4in + 4in 3in + 3in d, j, or n package (top view)
lp239, lp339, lp2901 low-power quad differential comparators slcs004a october 1987 revised may 1988 2 post office box 655303 ? dallas, texas 75265 schematic diagram (each comparator) 5 m a in + in gnd out 6 m a 0.2 m a v cc 0.2 m a absolute maximum ratings over operating free-air temperature range (unless otherwise noted) 2 supply voltage, v cc (see note 1) 36 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . differential input voltage, v id (see note 2) 36 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage range, v i (either input) 0.3 v to 36 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input current, v i 0.3 v (see note 3) 50 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . duration of output short-circuit to ground (see note 4) unlimited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous total dissipation (see note 5) see dissipation rating table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating free-air temperature range, t a : lp239 25 c to 85 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lp339 0 c to 70 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lp2901 40 c to 85 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range 65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lead temperature range 1,6 mm (1/16 inch) from case for 10 seconds: d or n package 260 c . . . . . . . . . . . lead temperature range 1,6 mm (1/16 inch) from case for 60 seconds: j package 300 c . . . . . . . . . . . . . . . . 2 stresses beyond those listed under absolute 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 recommended operating conditi ons is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. notes: 1. all voltage values, except differential voltages, are with respect to the network ground. 2. differential voltages are at in+ with respect to in . 3. this input current only exists when the voltage at any of the inputs is driven negative. the current flows through the collec tor-base junction of the input clamping device. in addition to the clamping device action, there is lateral n-p-n parasitic transistor a ction. this action is not destructive and normal output states are re-established when the input voltage returns to a value more positive t han 0.3 v at t a = 25 c. 4. short circuits between outputs to v cc can cause excessive heating and eventual destruction. 5. if the output transistors are allowed to saturate, the low bias dissipation and the on-off characteristics of the outputs kee p the dissipation very small (usually less than 100 mw). dissipation rating table package t a 25 c power rating derating factor above t a = 25 c t a = 70 c power rating t a = 85 c power rating d j n 950 mw 1025 mw 1150 mw 7.6 mw/ c 8.2 mw/ c 9.2 mw/ c 608 mw 656 mw 736 mw 494 mw 533 mw 598 mw
lp239, lp339, lp2901 low-power quad differential comparators slcs004a october 1987 revised may 1988 3 post office box 655303 ? dallas, texas 75265 recommended operating conditions lp239 lp339 lp2901 unit min max min max min max unit v cc supply voltage 5 30 5 30 5 30 v v ic common mode in p ut voltage v cc = 5 v 0 3 0 3 0 3 v v ic common - mode inp u t v oltage v cc = 30 v 0 28 0 28 0 28 v v i in p ut voltage v cc = 5 v 0 3 0 3 0 3 v v i inp u t v oltage v cc = 30 v 0 28 0 28 0 28 v t a operating free-air temperature 25 85 0 70 40 85 c electrical characteristics, v cc = 5 v, t a = 25 c (unless otherwise noted) parameter test conditions t a 2 min typ max unit v io in p ut offset voltage v cc = 5 v to 30 v, v o = 2 v, 25 c 2 5 mv v io inp u t offset v oltage cc , rs = 0, o , see note 6 full range 9 mv i io in p ut offset current 25 c 0.5 5 na i io inp u t offset c u rrent full range 1 15 na i ib in p ut bias current see note 7 25 c 2.5 25 na i ib inp u t bias c u rrent see note 7 full range 4 40 na v icr common-mode input volta g e single su pp ly 25 c 0 to v cc 1.5 v v icr g range single s u ppl y full range 0 to v cc 2 v a vd large-signal differential voltage amplification v cc = 15 v, rl = 15 k w 500 v/mv v1v v o = 2 v, 25 c 20 30 output sink current v i = 1 v, v i+ =0 o , see note 8 full range 15 ma v i + = 0 v o = 0.4 v 25 c 0.2 0.7 out p ut leakage current v i + = 1 v, v o = 5 v 25 c 0.1 na o u tp u t leakage c u rrent i+ , v i = 0 v o = 30 v full range 1 m a v id differential input voltage v i 0 (or v cc on split supplies) 36 v i cc supply current r l = all comparators 60 100 m a 2 full range is 25 c to 85 c for the lp239, 0 c to 70 c for the lp339, and 40 c to 85 c for the lp2901. notes: 6. v io is measured over the full common-mode input voltage range. 7. because of the p-n-p input stage, the direction of the current is out of the device. this current is essentially constant (i. e., independent of the output state). no loading change exists on the reference or input lines as long as the common-mode input voltage range i s not exceeded. 8. the output sink current is a function of the output voltage. these devices have a bimodal output section that allows them to sink (via a darlington connection) large currents at output voltages greater than 1.5 v, and smaller currents at output voltages less than 1.5 v. switching characteristics, v cc = 5 v, t a = 25 c, r l connected to 5 v through 5.1 k w parameter test conditions min typ max unit large-signal response time ttl logic swing v f =14v 1.3 m s response time ttl logic s w ing , v ref = 1 . 4 v 8 m s
lp239, lp339, lp2901 low-power quad differential comparators slcs004a october 1987 revised may 1988 4 post office box 655303 ? dallas, texas 75265 application information figure 1 shows the basic configuration for using the lp239, lp339, or lp2901 comparator. figure 2 shows the diagram for using one of these comparators as a cmos driver. figure 1. basic comparator in + in out 30 k w + v cc 1/4 lp239, lp339, or lp2901 figure 2. cmos driver in + in 100 k w 1/4 lp239, lp339, or lp2901 1/4 sn54/74ls00 or 1/4 sn54/74als1000a v cc + 12 3 out all pins of any unused comparators should be grounded. the bias network of the lp239, lp339, and lp2901 establishes a drain current that is independent of the magnitude of the power supply voltage over the range of 2 v to 30 v. it is usually necessary to use a bypass capacitor across the power supply line. the differential input voltage may be larger than v cc without damaging the device. protection should be provided to prevent the input voltages from going negative by more than 0.3 v. the output section has two distinct modes of operation: a darlington mode and a ground-emitter mode. this unique drive circuit permits the device to sink 30 ma at v o = 2 v in the darlington mode and 700 m a at v o = 0.4 v in the ground-emitter mode. figure 3 is a simplified schematic diagram of the output section. the output section is configured in a darlington connection (ignoring q3). if the output voltage is held high enough (above 1 v), q1 is not saturated and the output current is limited only by the product of the h fe of q1, the h fe of q2, and i1 and the 60- w saturation resistance of q2. the devices are capable of driving leds, relays, etc. in this mode while maintaining an ultralow power supply current of 60 m a typically. v cc v o q2 q1 q3 i1 = 6 m a figure 3. output-section schematic diagram
lp239, lp339, lp2901 low-power quad differential comparators slcs004a october 1987 revised may 1988 5 post office box 655303 ? dallas, texas 75265 application information without transistor q3, if the output voltage were allowed to drop below 0.8 v, transistor q1 would saturate and the output current would drop to zero. the circuit would be unable to pull low current loads down to ground or the negative supply, if used. transistor q3 has been included to bypass transistor q1 under these conditions and apply the current i1 directly to the base of q2. the output sink current is now approximately i1 times the h fe of q2 (700 m a at v o = 0.4 v). the output of the devices exhibit a bimodal characteristic with a smooth transition between modes. in both cases, the output is an uncommitted collector. several outputs can be tied together to provide a dot logic function. an output pullup resistor can be connected to any available power supply voltage within the permitted power supply range, and there is no restriction on this voltage based on the magnitude of the voltage that is supplied to v cc of the package.
lp239, lp339, lp2901 low-power quad differential comparators slcs004a october 1987 revised may 1988 6 post office box 655303 ? dallas, texas 75265
important notice texas instruments and its subsidiaries (ti) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. all products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. ti warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with ti's standard warranty. testing and other quality control techniques are utilized to the extent ti deems necessary to support this warranty. specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. certain applications using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage (acritical applicationso). ti semiconductor products are not designed, authorized, or warranted to be suitable for use in life-support devices or systems or other critical applications. inclusion of ti products in such applications is understood to be fully at the customer's risk. in order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. ti assumes no liability for applications assistance or customer product design. ti does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of ti covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. ti's publication of information regarding any third party's products or services does not constitute ti's approval, warranty or endorsement thereof. copyright ? 1998, texas instruments incorporated
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