Features■ Wide single supply voltage range or dualsupplies for all devices: +2 to +36 V or ±1 V to±18 V■ Very low supply current (1.1 mA) independentof supply voltage■ Low input bias current: 25 nA typ■ Low input offset current: ±5 nA typ■ Low input offset voltage: ±1 mV typ■ Input common-mode voltage range includesground■ Low output saturation voltage: 250 mV typ;(ISINK = 4 mA)■ Differential input voltage range equal to thesupply voltage■ TTL, DTL, ECL, MOS, CMOS compatibleoutputsDescriptionThis family of devices consists of fourindependent precision-voltage comparators withan offset voltage specification as low as 2 mVmaximum for LM339A, LM239A and LM139A.Each comparator has been designed specificallyto operate from a single power supply over a widerange of voltages. Operation from split powersupplies is also possible.These comparators also have a uniquecharacteristic in that the input common modevoltage range includes ground even thoughoperated from a single power supply voltage.