Single comparator with latch in 8-SOIC
The Maxim Integrated MAX9203ESA+T is a single comparator with a latch function, packaged in an 8-SOIC (0.154", 3.90mm width) surface-mount package. It provides a TTL-compatible output and is designed for applications requiring a latched comparison result, such as zero-crossing detectors, window comparators, and sample-and-hold front ends. The part operates over the industrial temperature range of -40°C to 85°C.
86.02 dB CMRR and PSRR — noise rejection for threshold sensing
With a typical CMRR and PSRR of 86.02 dB each, this comparator rejects common-mode and supply noise well, which matters when the threshold is a few millivolts above ground or near the supply rail. The input offset voltage is specified at 4 mV max at ±5V, and input bias current is 5 µA max — both numbers to budget when setting the resistor divider for the reference voltage.
Supply flexibility and quiescent draw
The MAX9203ESA+T accepts a single supply from 4.75V to 10.5V or a dual supply from ±2.375V to ±5.75V. Quiescent current is listed as 2 mA, 1.6 mA, and 800 µA — the spread likely reflects different supply conditions or output states; the 800 µA figure is the one to use for a low-power budget at lower supply voltages. That makes it viable for battery-operated threshold detectors where every microamp counts.
Active lifecycle — no LTB risk, standard channel availability
The MAX9203ESA+T carries an Active lifecycle status per the manufacturer, with ROHS3 compliance. There is no last-time-buy window to track, and the part is available through the usual franchised and independent distribution channels.