MAX793R|MAX793S|MAX793T - 3.0V/3.3V可调、微处理器监控电路

MAX793R|MAX793S|MAX793T - 3.0V/3.3V可调、微处理器监控电路 - 美信芯片 - 功能完备的电池备份IC，用于3V/3.3V系统 - 美信半导体

产品概述

The MAX793/MAX794/MAX795 microprocessor (µP) supervisory circuits monitor and control the activities of +3.0V/+3.3V µPs by providing backup-battery switchover, among other features such as low-line indication, µP reset, write protection for CMOS RAM, and a watchdog (see the Selector Guide in the full data sheet). The backup-battery voltage can exceed VCC, permitting the use of 3.6V lithium batteries in systems using 3.0V to 3.3V for VCC.

The MAX793/MAX795 offer a choice of reset threshold voltage range (denoted by suffix letter): 3.00V to 3.15V (T), 2.85V to 3.00V (S), and 2.55V to 2.70V (R). The MAX794's reset threshold is set externally with a resistor divider. The MAX793/MAX794 are available in 16-pin DIP and narrow SO packages, and the MAX795 comes in 8-pin DIP and SO packages.

关键特性

以下关键特性由Maxim美信半导体提供：MAX793/MAX794/MAX795

Precision Supply-Voltage Monitor:

Fixed Reset Trip Voltage (MAX793/MAX795)

Adjustable Reset Trip Voltage (MAX794)

Guaranteed Reset Assertion to VCC = 1V

Backup-Battery Power Switching—Battery Voltage Can Exceed VCC

On-Board Gating of Chip-Enable Signals—7ns Max Propagation DelayMAX793/MAX794 Only

Battery Freshness Seal

Battery OK Output (MAX793)

Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning

Independent Watchdog Timer (1.6s timeout)

Manual Reset Input

热门应用

电池供电计算机/控制器

精确的µP电源监控

嵌入式控制器

智能控制器

便携式设备

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