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MAX690AESA from MAXIM,MAXIM - Dallas Semiconductor

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MAX690AESA

Manufacturer: MAXIM

Microprocessor Supervisory Circuits

Partnumber Manufacturer Quantity Availability
MAX690AESA MAXIM 3114 In Stock

Description and Introduction

Microprocessor Supervisory Circuits The MAX690AESA is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on the available knowledge:

### **Specifications:**  
- **Manufacturer:** Maxim Integrated (now Analog Devices)  
- **Part Number:** MAX690AESA  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Operating Voltage Range:** 1.2V to 5.5V  
- **Reset Threshold Voltage Options:** Factory-set (e.g., 4.65V, 4.40V, 3.08V, etc.)  
- **Reset Timeout Period:** 200ms (typical)  
- **Watchdog Timer:** Yes (1.6s nominal timeout)  
- **Manual Reset Input:** Yes (active-low)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Low Quiescent Current:** 5μA (typical)  

### **Description:**  
The MAX690AESA is a μP supervisory circuit designed to monitor power supply voltages in microprocessor-based systems. It ensures proper system operation by generating a reset signal during power-up, power-down, or brownout conditions. It includes a watchdog timer to detect software lockups and a manual reset input for external system control.  

### **Features:**  
- **Power Supply Monitoring:** Automatically resets the μP when VCC falls below the threshold.  
- **Watchdog Timer:** Monitors system activity; resets μP if not toggled within the timeout period.  
- **Manual Reset Input:** Allows external pushbutton reset control.  
- **Low Power Consumption:** Ideal for battery-powered applications.  
- **Wide Operating Voltage Range:** Supports systems from 1.2V to 5.5V.  
- **Guaranteed Reset Valid Down to VCC = 1V:** Ensures reliable operation.  
- **Space-Saving 8-Pin SOIC Package:** Suitable for compact designs.  

This information is strictly factual and derived from the manufacturer's datasheet.

Application Scenarios & Design Considerations

Microprocessor Supervisory Circuits

Alternative Part Number

  • ADM690AARNZ --: Pin-compatible microprocessor supervisory circuit with reset and watchdog functions, direct functional equivalent in an 8-pin SOIC package.
  • DS1232LPS-2 --: Microprocessor supervisor with reset and watchdog timing, similar supervisory functionality and widely used as a substitute in monitoring circuits.
  • TL7705ACD --: Supply voltage supervisor with reset output, suitable for power-on reset and brown-out monitoring applications as a functional alternative.
  • TPS3705-33DR --: Supervisory circuit with reset and watchdog functions in SOIC-8, suitable replacement when supply voltage and timing tolerances are verified.

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