2.63V threshold — the reset trip point that decides fit
The MAX823REUK-T: That 2.63V threshold targets 3.3V or 3.0V supply rails where the supervisor must trip before the downstream logic enters an undefined state — typically 10-15% below nominal, which is exactly where this part sits. The 140ms minimum reset timeout holds the processor in reset long enough for the oscillator and core to stabilise after power-up.
Industrial temperature range and package footprint
The SOT-23-5 package (SC-74A, SOT-753) is a standard 5-pin footprint shared by many supervisor ICs, so a PCB layout designed for a competing part often accepts this device without a board spin. Surface-mount assembly with the SOT-23-5 body means the part reflows on a standard lead-free profile — no special handling beyond the usual MSL precautions for a small-outline plastic package.
Active production — no end-of-life pressure for new designs
Note that the RoHS compliance status is listed as non-compliant, which means the part contains lead (Pb) above the exemption threshold. For applications that require RoHS exemption (e.g., certain industrial or automotive categories where leaded solders are still permitted), this is acceptable; for full RoHS-compliant assemblies, verify the exemption status with your compliance team.