General Description

The MIC2774 is a dual power supply supervisor that provides undervoltage monitoring, manual reset capability, and power-on reset generation in a compact 5-pin SOT-23 package. Features include two undervoltage detectors, one fixed and one adjustable, and a choice of reset outputs. One undervoltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available. The second, user-adjustable input is compared against a 300mV reference. This low reference voltage allows for the monitoring of voltages lower than those supported by previous supervisor ICs.

特性 Features

? Monitors two independent power supplies for undervoltage conditions

? One fixed and one user-adjustable input

? Choice of ten factory-programmed thresholds

? Adjustable input can monitor supplies as low as 0.3V

? Generates 140ms (min.) power-on reset pulse

? Manual reset input

? Choice of active-high, active-low, or open-drain active-low reset outputs

? Inputs may be pulled above VDD (7V 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

? Pin-compatible upgrade for MAX6306/09/12

Applications

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

? PDAs, hand-held PCs

? Embedded controllers

? Telecommunications systems

? Power supplies

? Wireless/cellular systems

? Networking hardware