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MAX795R, MAX795S, MAX795T

3.0V/3.3V可调、微处理器监控电路

功能完备的电池备份IC,用于3V/3.3V系统

产品详情

主要特征

应用/用途

Parametric specs for Battery Backup Circuits
Reset Thresh. (V) 2.5 to 3.3
Reset Out Active Low
Open Drain
ICC (µA) (max) 50
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
4.16
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参量

Parametric specs for Battery Backup Circuits
Reset Thresh. (V) 2.5 to 3.3
Reset Out Active Low
Open Drain
ICC (µA) (max) 50
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
4.16

主要特征

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 Delay
MAX793/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

应用/用途

  • 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

描述

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.

简化框图

MAX793、MAX793R、MAX793S、MAX793T、MAX794、MAX795、MAX795R、MAX795S、MAX795T:典型工作电路 MAX793、MAX793R、MAX793S、MAX793T、MAX794、MAX795、MAX795R、MAX795S、MAX795T:典型工作电路 Zoom icon

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心