LM139J

The LM139J from Texas Instruments is a quad differential voltage comparator IC. It is designed to operate from a single power supply ranging from 2V to 36V, or from dual supplies between ±1V and ±18V. The device features a low supply current drain of 0.8 mA, which is independent of the supply voltage.

Key electrical characteristics include a low input bias current of 25 nA, a low input offset current of 3 nA, and a typical input offset voltage of 2 mV. The common-mode input voltage range includes ground, and the differential input voltage range is equal to the maximum-rated supply voltage of ±36V. The output is compatible with TTL, MOS, and CMOS logic systems and features an open-collector, open-drain output type.

This comparator is housed in a 14-CDIP (Ceramic Dual In-line Package) with through-hole mounting. The operating temperature range is -55°C to 125°C, suitable for industrial and military applications. The LM139J is also available with radiation assurance, including Total Ionizing Dose and ELDRS Free specifications up to 100 krad(Si).

Applications for the LM139J include industrial and automotive systems, power supervision, oscillators, peak detectors, and logic voltage translation. Its wide operating voltage and low power consumption make it a versatile choice for various design needs.