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.

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