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MAX791CSE from MAXIM,MAXIM - Dallas Semiconductor

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MAX791CSE

Manufacturer: MAXIM

Microprocessor Supervisory Circuit

Partnumber Manufacturer Quantity Availability
MAX791CSE MAXIM 793 In Stock

Description and Introduction

Microprocessor Supervisory Circuit The MAX791CSE is a microprocessor (µP) supervisory circuit manufactured by Maxim Integrated. Below are the factual details about its specifications, descriptions, and features:

### **Specifications:**  
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX791CSE  
- **Package:** 16-pin SOIC (Small Outline Integrated Circuit)  
- **Operating Voltage Range:** 4.5V to 5.5V  
- **Reset Threshold Voltage:** Adjustable or fixed (depending on variant)  
- **Reset Timeout Period:** Typically 200ms (adjustable via external capacitor)  
- **Watchdog Timer:** Programmable timeout period (1.6s nominal)  
- **Backup Battery Switchover:** Supports automatic switchover to backup battery  
- **Battery Backup Voltage Range:** 1V to 5.5V  
- **Power-Fail Comparator:** Monitors input voltage for early warning  
- **Operating Temperature Range:** 0°C to +70°C  

### **Descriptions:**  
The MAX791CSE is a comprehensive µP supervisor designed to monitor power supply voltages, provide reset signals, and manage backup battery switchover. It ensures reliable system operation by generating a reset signal during power-up, power-down, or brownout conditions. The watchdog timer prevents system lockups, and the power-fail comparator provides early warning of impending power loss.

### **Features:**  
- **Reset Output:** Active-low or active-high (depending on configuration)  
- **Manual Reset Input:** Allows external reset triggering  
- **Watchdog Timer:** Resets µP if software fails to toggle within set time  
- **Battery Backup:** Seamless switchover to backup power  
- **Low Quiescent Current:** Minimizes power consumption  
- **Power-Fail Comparator:** Provides early warning of voltage drop  
- **Adjustable Reset Threshold:** Customizable for different applications  

The MAX791CSE is commonly used in embedded systems, industrial controls, and critical µP-based applications requiring reliable power monitoring and backup support.  

(Note: For exact specifications, refer to the official datasheet from Maxim Integrated.)

Application Scenarios & Design Considerations

Microprocessor Supervisory Circuit

Alternative Part Number

  • ADM8696ARWZ --: Supervisory/MPU reset IC with watchdog and battery backup functions, functionally similar to the MAX791 in a comparable SOIC package.
  • DS1232LPS --: Microprocessor supervisor with reset and watchdog features, a common drop-in style alternative for MAX791 supervisory applications.
  • TPS3705-33DGNR --: Voltage supervisor with reset and watchdog timing, suitable replacement where MAX791 reset/supervisory functions are needed.
  • TPS3705-33DR --: Voltage supervisor with reset and watchdog in SOIC, a functional alternative from a different series and vendor.
  • MC33064D-5G --: Undervoltage sensing/reset IC in SOIC, usable as a simpler reset supervisor alternative when full watchdog features are not required.

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