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MAX809JD from PHILIPS

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MAX809JD

Manufacturer: PHILIPS

3-pin microprocessor resets

Partnumber Manufacturer Quantity Availability
MAX809JD PHILIPS 12000 In Stock

Description and Introduction

3-pin microprocessor resets The MAX809JD is a microprocessor (μP) supervisory circuit manufactured by Philips (now NXP Semiconductors).  

### **Specifications:**  
- **Type:** Voltage Monitor / Reset IC  
- **Reset Threshold Voltage:** 4.65V (typical for 5V systems)  
- **Operating Voltage Range:** 1.1V to 5.5V  
- **Output Type:** Active-Low Reset  
- **Reset Timeout Period:** Typically 140ms (adjustable in some variants)  
- **Package:** 8-pin SOIC (JD suffix indicates industrial temperature range)  
- **Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- Monitors the power supply voltage of a microprocessor or microcontroller.  
- Generates a reset signal when the voltage drops below a preset threshold.  
- Ensures proper system initialization during power-up, power-down, or brownout conditions.  

### **Features:**  
- **Precision Voltage Monitoring:** Accurate reset threshold detection.  
- **Low Power Consumption:** Typically 35μA supply current.  
- **Manual Reset Input:** Allows external reset control.  
- **Guaranteed Reset Output Valid Down to VCC = 1V.**  
- **No External Components Required:** Simplifies circuit design.  

This IC is commonly used in embedded systems to prevent erratic operation due to unstable power conditions.  

(Note: Philips' semiconductor division became NXP Semiconductors in 2006.)

Application Scenarios & Design Considerations

3-pin microprocessor resets

Alternative Part Number

  • DS1233Z-5 --: Pin-compatible 5V microprocessor reset supervisor with open-drain output, functionally equivalent to the MAX809J.
  • MCP130-450DI/TO --: 5V reset supervisor with active-low open-drain output and similar trip voltage, suitable drop-in replacement.
  • TL7705ACP --: Widely available 5V supply voltage supervisor with reset output, usable as an alternative with minor circuit adjustment.

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