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MAX707ESA

Manufacturer: MAXIM, MAX

Low-Cost, uP Supervisory Circuits

Partnumber Manufacturer Quantity Availability
MAX707ESA MAXIM, MAX 10235 In Stock

Description and Introduction

Low-Cost, uP Supervisory Circuits The MAX707ESA 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:** MAX707ESA  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Operating Voltage Range:** 1.2V to 5.5V  
- **Reset Threshold Options:** 4.40V, 4.65V, or 4.00V (adjustable via external resistor)  
- **Reset Timeout Period:** 200ms (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Quiescent Current:** 35µA (typical)  
- **Manual Reset Input:** Active-low (MR)  
- **Watchdog Timer:** 1.6s timeout (typical)  

### **Descriptions:**
The MAX707ESA is a precision µP supervisory circuit designed to monitor power supply voltages in microprocessor-based systems. It provides reset signals during power-up, power-down, and brownout conditions to ensure proper system operation. It includes a watchdog timer, manual reset input, and a push-pull active-low reset output.

### **Features:**
1. **Power Supply Monitoring:**  
   - Monitors VCC for undervoltage conditions.  
   - Generates a reset signal when VCC falls below the threshold.  

2. **Watchdog Timer:**  
   - Monitors µP activity; triggers reset if the watchdog input (WDI) is not toggled within 1.6s.  

3. **Manual Reset Input (MR):**  
   - Allows a push-button reset for system debugging.  

4. **Reset Output:**  
   - Active-low RESET (push-pull output) ensures µP reset during power anomalies.  

5. **Low Power Consumption:**  
   - 35µA typical supply current for energy efficiency.  

6. **Wide Operating Voltage Range:**  
   - Supports systems from 1.2V to 5.5V.  

7. **Temperature Stability:**  
   - Operates reliably across industrial temperature ranges (-40°C to +85°C).  

For detailed electrical characteristics and application circuits, refer to the official MAX707ESA datasheet from Maxim Integrated.

Application Scenarios & Design Considerations

Low-Cost, uP Supervisory Circuits

Alternative Part Number

  • ADM707ARZ --: Pin-compatible microprocessor supervisory circuit with the same reset and watchdog functions, widely available and a direct functional drop-in.
  • TL7705ACP --: Classic 5V supply supervisor with reset output; requires minor pinout adaptation but is a proven, low-cost alternative.
  • MC34064P-5 --: Simple 5V undervoltage sensing reset IC that can replace the supervisory function in less demanding designs.
  • MC33064P-5 --: Undervoltage sensing circuit with reset output, suitable as a functional substitute where exact pinout compatibility is less critical.

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