What the MAX823TEUK is and where it fits
The MAX823TEUK is a simple reset/power-on reset supervisor IC from Maxim Integrated. It monitors a single voltage rail and asserts a reset signal when the supply drops below the 3.08 V threshold, holding reset for a minimum of 140 ms after the rail recovers. The push-pull, active-low output drives directly into the reset input of an MCU, DSP, or FPGA without an external pull-up resistor. Rated from -40°C to 125°C, it suits industrial controllers, automotive ECUs, and base-station power sequencers that need a reliable brownout monitor in a compact SOT-23-5 footprint.
RoHS non-compliant — check your BOM requirements
The MAX823TEUK is marked RoHS non-compliant. That means it contains lead (Pb) in the solder finish or internal construction, which exempts it from ROHS restrictions only if your product falls under a specific exemption (e.g., medical, aerospace, or high-reliability industrial). For EU or China RoHS markets, you will need a compliant alternate — the MAX823TEUK+T is the lead-free version, though the evidence does not confirm exact pin compatibility. Verify the alternate before swapping.
Active production — no LTB risk
That makes it safe to specify into new designs and stable for ongoing production builds. The part is available through independent distribution channels; availability and pricing are confirmed at quote time against an RFQ.