LP339 LP339 Ultra-Low Power Quad Comparator Literature Number: SNOSBE0A
LP339 Ultra-Low Power Quad Comparator General Description The LP339 consists of four independent voltage comparators designed specifically to operate from a single power supply and draw typically 60 µA of power supply drain current over a wide range of power supply voltages. Operation from split supplies is also possible and the ultra-low power supply drain current is independent of the power supply voltage.
LP339 Absolute Maximum Ratings (Note 1) Operating Temperature Range 0˚C to +70˚C Storage Temperature Range −65˚ to +150˚C Soldering Information: Dual-In-Line Package (10 sec.) +260˚C S.O. Package: Vapor Phase (60 sec.) +215˚C Infrared (15 sec.) +220˚C See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” for other methods of soldering surface mount devices.
LP339 Electrical Characteristics (Continued) Note 9: Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the common-mode range, the comparator will provide a proper output state. The low input voltage state must not be less than −0.3 VDC (or 0.3 VDC below the magnitude of the negative power supply, if used) at TA =25˚C. Note 10: At output switch point, VO =1.
LP339 Notice that the output section is configured in a Darlington connection (ignoring Q3). Therefore, if the output voltage is held high enough (VO≥1 VDC), Q1 is not saturated and the output current is limited only by the product of the betas of Q1, Q2 and I1 (and the 60Ω RSAT of Q2). The LP339 is thus capable of driving LED’s, relays, etc. in this mode while maintaining an ultra-low power supply current of typically 60 µA.
LP339 Typical Applications (V+ =15 VDC) One-Shot Multivibrator DS005226-13 Time-Delay Generator DS005226-15 5 www.national.
LP339 Typical Applications (V+ =15 VDC) (Continued) ORing the Outputs DS005226-16 Squarewave Oscillator DS005226-17 www.national.
LP339 Typical Applications (V+ =15 VDC) (Continued) Three Level Audio Peak Indicator DS005226-19 LED Driver DS005226-22 Pulse Generator DS005226-18 7 www.national.
LP339 Typical Applications (V+ =15 VDC) (Continued) Bi-Stable Multivibrator DS005226-21 Relay Driver DS005226-23 Buzzer Driver Comparator With 60 mA Sink Capability DS005226-24 DS005226-25 www.national.
LP339 Typical Applications (V+ =15 VDC) (Continued) Non-Inverting Comparator with Hysteresis Inverting Comparator with Hysteresis DS005226-26 DS005226-27 Comparing Input Voltages of Opposite Polarity Basic Comparator Output Strobing DS005226-29 DS005226-30 DS005226-28 Transducer Amplifier Zero Crossing Detector (Single Power Supply) DS005226-32 DS005226-31 9 www.national.
LP339 Typical Applications (V+ =15 VDC) (Continued) Split-Supply Applications Zero Crossing Detector Comparator With a Negative Reference DS005226-34 DS005226-33 www.national.
LP339 Physical Dimensions inches (millimeters) unless otherwise noted S.O. Package (M) Order Number LP339M or LP339MX NS Package M14A Molded Dual-In-Line Package (N) Order Number LP339N NS Package Number N14A 11 www.national.
LP339 Ultra-Low Power Quad Comparator Notes LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1.
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