MIC2774中文资料Dual Voltage Supervisor w/ Active-Low Open-Drain数据手册Microchip规格书

描述 Description

The MIC2774 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 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 monitoring voltages lower than those supported by previous supervisor ICs.The reset outputs are asserted at power-on and any time either voltage drops below the programmed threshold voltages and remains asserted for 140ms (min.) after they subsequently rise back above the threshold boundaries.Manual reset functionality can be provided by a switch connected between ground and the /MR input. A wide choice of voltage thresholds provides for a variety of supply voltages and tolerances. Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.5µA.

特性 Features

• Monitors two independent power supplies for under-voltage conditions
• One fixed and one user adjustable input
• Choice of factory-programmed thresholds
• Adjustable input can monitor supplies as low as 0.3V
• Generates 140ms (minimum) power-on reset pulse
• Manual reset input
• Choice of active-high, active-low, or open-drain activelow reset outputs
• Inputs may be pulled above VDD(7V abs. max.)
• Open-drain output can 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-lead SOT-23 package
• Pin compatible upgrade for MAX6306/09/12

简介

MIC2774属于集成电路（IC）的监控器。由制造生产的MIC2774监控器PMIC 监控器用于监视和/或控制电路中的电压轨，能够连接微控制器以维持一定的功率限值。监控器类型包括电池备用电路、监控器、多电压监控器、电源监控器、稳压器/监控器、复位计时器、定序器、简单复位/上电复位、智能开/关控制器、系统管理器、电压检测器和看门狗电路。