STM6904中文资料Quad, ultralow voltage supervisor with push-button reset数据手册ST规格书

描述 Description

The STM6904 supervisor is a low voltage/low supply current processor supervisor, designed to monitor up to four system power supply voltages. This device is targeted at applications such as “Set-Top Boxes” (STBs), portable, battery-powered systems, networking and communication systems.
The device supports a push-button type manual reset input (MR). Two of the four supply monitors (VCCand V2IN) have fixed (customer-selectable, factory-trimmed) thresholds (VRST1and VRST2). The other two voltage monitor inputs (V3IN and V4IN) are monitored using externally adjustable threshold (0.600 V internal reference) to meet specific level requirements.
If any of the four monitored voltages drops below its factory-trimmed or adjustable thresholds, or if the MRis asserted to logic low, the reset output RSTis asserted (driven low). Once asserted, RST is maintained low for a minimum delay period (tREC) after ALL monitored supplies rise above their respective thresholds and MR returns to high. This device is in the correct reset output logic state when VCCgreater than 0.8 V.
The STM6904 is available in a standard 8-lead MSOP (TSSOP) package.

特性 Features

• Quad voltage monitoring
• Accurate ±1.8% across temperature voltage threshold (±1% at 25 °C)
• Primary supply (VCC) monitor. Fixed (factory -programmed) reset thresholds: 3.078 to 2.188 V
• Second fixed (V2IN) monitor. Fixed (factory-programmed) reset thresholds: 2.333 to 1.110 V
• Two additional adjustable supply monitor inputs (externally adjustable)
• 0.6 V internal reference
• RSToutput (open drain)
• Output guaranteed for VCC ≥ 0.8 V
• Reset delay time (tREC) pin selectable
• Manual reset input (MR)
• Low supply current of 12 μA (typ)
• Power supply voltage 0.8 to 5.5 V
• RoHS compliant (green package)
• 8-pin MSOP/TSSOP
• Operating temperature: –40 to 85 °C (industrial grade)

简介

STM6904属于集成电路（IC）的监控器。由制造生产的STM6904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。