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MAX709LESA from MAX,MAXIM - Dallas Semiconductor

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MAX709LESA

Manufacturer: MAX, MAXIM, MAXIM

Power-Supply Monitor with Reset
Partnumber Manufacturer Quantity Availability
MAX709LESA MAX, MAXIM, MAXIM 181 In Stock

Description and Introduction

Power-Supply Monitor with Reset The **MAX709LESA** is a microprocessor (μP) supervisory circuit manufactured by **Maxim Integrated (now part of Analog Devices)**. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Type:** Voltage Monitor/Supervisory IC  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Operating Voltage Range:** 1.2V to 5.5V  
- **Reset Threshold Options:** Factory-set (e.g., 4.65V, 4.40V, 3.08V, etc.)  
- **Reset Timeout Period:** 140ms (minimum)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Quiescent Current:** 35μA (typical)  

### **Descriptions:**
- The **MAX709LESA** monitors system voltage and generates a reset signal if the supply voltage drops below a preset threshold.  
- It ensures proper μP/microcontroller operation by holding the reset signal active until the voltage stabilizes.  
- The device is designed for **low-power applications** and includes manual reset capability.  

### **Features:**
- **Precision Voltage Monitoring:** Ensures reliable reset generation.  
- **Manual Reset Input:** Allows external push-button reset control.  
- **Low Quiescent Current:** Suitable for battery-powered systems.  
- **Guaranteed Reset Valid Down to VCC = 1V:** Ensures reset integrity.  
- **No External Components Required:** Simplifies circuit design.  
- **Available in Multiple Threshold Voltages:** Supports various μP supply levels.  

This IC is commonly used in **embedded systems, industrial controls, and automotive electronics** for reliable power-on reset functionality.  

(Note: For exact threshold voltage options, refer to the datasheet.)

Application Scenarios & Design Considerations

Power-Supply Monitor with Reset

Alternative Part Number

  • ADM809LARTZ-REEL --: Pin-compatible microprocessor supervisor with active-low reset and similar threshold, widely available and directly interchangeable in most designs.
  • MCP130-450HI/TO --: Low-cost voltage supervisor with comparable reset threshold and open-drain output, suitable drop-in replacement with minor layout adjustment.
  • TL7705ACDR --: Classic supply voltage supervisor offering adjustable reset delay and active-low reset, a robust alternative when exact pinout match is not mandatory.
  • ADM709LARZ --: Pin-compatible microprocessor supervisory circuit with the same reset threshold and functions, widely available from a major supplier.
  • TL7705ACD --: Similar supply-voltage supervisor with reset output, commonly used as a functional substitute in supervisory applications.
  • MC33064D-5 --: Undervoltage sensing circuit providing reset functionality, suitable as an alternative for basic supply monitoring.
  • MC34064D-5 --: Simple 5V undervoltage sensing circuit with reset output, suitable as a lower-cost functional substitute.

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