This document describes the features and characteristics of the CAT803, CAT809, and CAT810 3-pin microprocessor power supply supervisors from Catalyst Semiconductor, Inc. It includes precision monitoring of +5.0V, +3.3V, +3.0V, and +2.5V power supplies, three output configurations, direct replacements for MAX803, MAX809, and MAX810 products, and suitability for applications operating over the industrial temperature range.
The CAT803, CAT809, and CAT810 are 3‑pin micro‑processor power‑supply supervisors that monitor +5.0 V, +3.3 V, +3.0 V and +2.5 V rails. They provide reset signals when the supply voltage falls below programmable thresholds and remain asserted for at least 140 ms after recovery. The devices are direct replacements for the MAX803/809/810 series and operate over an industrial temperature range.
The family is offered in ROHS‑compliant SOT‑23 and SC70 packages, with open‑drain (CAT803) or push‑pull (CAT809, CAT810) reset outputs. Detailed electrical characteristics, typical operating curves, and application notes are provided for designers of computers, servers, embedded systems, and other digital equipment.
| Operating Temperature Range | -40°C to +85°C |
|---|---|
| Input Current (Voc) | 20 mA |
| Reset Output Current | 20 mA |
| Package Options | SOT‑23, SC70 (ROHS‑compliant) |
The CAT803 has an open‑drain RESET output (active LOW).
They are offered in ROHS‑compliant SOT‑23 and SC70 surface‑mount packages.
They operate from –40 °C to +85 °C.