General Description

The MIC2777 is a dual power supply supervisor that provides under-voltage monitoring, manual reset capability, and power-on reset generation in a compact 5-pin SOT package. Features include two under-voltage detectors, one fixed and one adjustable, and both active-high and active-low reset outputs. One under-voltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available. The other under-voltage detector is user-adjustable.

特性 Features

? Monitors two independent power supplies for under-voltage conditions

? One fixed and one user adjustable input

? 1.5 theshold accuracy

? Choice of factory-programmed thresholds

? User-adjustable input can monitor supplies as low as 0.3V

? Generates 140ms (minimum) power-on RESET pulse

? Manual reset capability

? Both active-high and active-low RESET outputs

? Input may be pulled above VDD (abs. max.)

? /RST output valid down to 1.2V

? Ultra-low supply current, 3.5μA typical

? Rejects brief input transients

? IttyBitty? 5-pin SOT-23 package

Applications

? Monitoring processor, ASIC, or FPGA core and I/O voltages

? Computer systems

? PDAs, hand-held PCs

? Embedded controllers

? Telecommunications systems

? Power supplies

? Wireless / Cellular systems

? Networking hardware