CAT811

CAT811, CAT812 4-Pin Microprocessor Power Supply Supervisors FEATURES s Precision monitoring of H GEN FR ALO EE LE A D F R E ETM s Direct replacements for the MAX811 and +5.0 V (+/- 5%, +/- 10%, +/- 20%), +3.3 V (+/- 5%, +/ 10%), +3.0 V (+/- 10%) and +2.5 V (+/- 5%) power supplies s Offered in two output configurations: MAX812 in applications operating over the industrial temperature range s Reset valid down to VCC = 1.0 V s 6 µA power supply current s Power supply transient immunity s Compact 4-pin SOT143 package s Industrial temperature range: -40˚C to +85˚C - CAT811: Active LOW reset - CAT812: Active HIGH reset s Manual reset input APPLICATIONS s Computers s Servers s Laptops s Cable modems s Wireless communications s Embedded control systems s White goods s Power meters s Intelligent instruments s PDAs and handheld equipment DESCRIPTION The CAT811 and CAT812 are µP supervisory circuits that monitor power supplies in digital systems. The CAT811 and CAT812 are direct replacements for the MAX811 and MAX812 in applications operating over the industrial temperature range; both have a manual reset input. These devices generate a reset signal, which is asserted while the power supply voltage is below a preset threshold level and for at least 140 ms after the power supply level has risen above that level. The underlying floating gate technology, AE2(TM) used by Catalyst Semiconductor, makes it possible to offer any custom reset threshold value. Seven industry standard ...