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MAX708CPA+ from MAX,MAXIM - Dallas Semiconductor

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MAX708CPA+

Manufacturer: MAX, MAXIM

Low-Cost, µP Supervisory Circuits

Partnumber Manufacturer Quantity Availability
MAX708CPA+ MAX, MAXIM 28095 In Stock

Description and Introduction

Low-Cost, µP Supervisory Circuits The **MAX708CPA+** is a microprocessor (µP) supervisory circuit manufactured by **Maxim Integrated** (now part of Analog Devices). Below are its key specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Type:** Microprocessor Supervisory Circuit  
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)  
- **Operating Voltage Range:** 1.2V to 5.5V  
- **Reset Threshold Options:** Adjustable or fixed (factory-set at 4.40V, 4.00V, 3.08V, 2.93V, or 2.63V)  
- **Reset Timeout Period:** 200ms (min)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Manual Reset Input:** Active-low (MR)  
- **Power-Fail Comparator:** Monitors an auxiliary voltage  
- **Watchdog Timer:** 1.6s timeout (typical)  

### **Descriptions:**
- The MAX708CPA+ ensures proper system operation by monitoring power supply voltages and generating a reset signal if the voltage drops below a preset threshold.  
- It includes a watchdog timer to detect µP lockups and a power-fail comparator for early warning of power loss.  
- The manual reset input (MR) allows for user-initiated resets.  

### **Features:**
- **Precision Voltage Monitoring:** Ensures reliable µP reset during power-up, power-down, and brownout conditions.  
- **Adjustable or Fixed Thresholds:** Supports multiple voltage monitoring levels.  
- **Watchdog Timer:** Prevents system lockup by requiring periodic µP toggling.  
- **Power-Fail Comparator:** Provides early warning for backup power switching.  
- **Low Power Consumption:** Typically 50µA supply current.  
- **Manual Reset Capability:** Allows external reset triggering.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Low-Cost, µP Supervisory Circuits

Alternative Part Number

  • ADM708AN --: Pin-compatible microprocessor supervisory circuit with reset and watchdog functions, direct functional equivalent to the MAX708 in an 8-pin DIP package.
  • TL7705ACP --: Widely available supply-voltage supervisor with reset output, suitable replacement for power-on reset and brownout monitoring applications.
  • MC34064P-5 --: Undervoltage sensing circuit providing reset output for 5V systems, a common and cost-effective alternative for supervisory functions.

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