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MAX705MJA from MAXIM,MAXIM - Dallas Semiconductor

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MAX705MJA

Manufacturer: MAXIM

Low-Cost, uP Supervisory Circuits

Partnumber Manufacturer Quantity Availability
MAX705MJA MAXIM 4614 In Stock

Description and Introduction

Low-Cost, uP Supervisory Circuits The MAX705MJA is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Manufacturer:** Maxim Integrated (now Analog Devices)  
- **Package:** 8-pin CERDIP (MJA package)  
- **Operating Voltage Range:** 1.0V to 5.5V  
- **Reset Threshold Options:** Adjustable or fixed (4.40V, 4.65V, or 4.90V for 5V systems)  
- **Reset Timeout Period:** 200ms (typical)  
- **Operating Temperature Range:** -55°C to +125°C (military-grade)  
- **Manual Reset Input:** Active-low (MR) with internal pull-up  
- **Watchdog Timer:** 1.6s timeout (typical)  
- **Power-Fail Comparator:** Monitors an auxiliary voltage  

### **Descriptions:**  
The MAX705MJA is a 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. The watchdog timer monitors software execution, and the power-fail comparator provides early warning of voltage failure.  

### **Features:**  
- **Precision Voltage Monitoring:** Ensures reliable reset generation.  
- **Watchdog Timer:** Detects software lockups.  
- **Manual Reset Input:** Allows external reset triggering.  
- **Power-Fail Comparator:** Monitors an auxiliary supply for early warning.  
- **High Reliability:** Military-grade temperature range (-55°C to +125°C).  
- **Low Power Consumption:** Typically 50μA supply current.  

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

Application Scenarios & Design Considerations

Low-Cost, uP Supervisory Circuits

Alternative Part Number

  • ADM705ANZ --: Pin-compatible microprocessor supervisory circuit with reset and watchdog functions, direct functional equivalent to the MAX705 in a DIP package.
  • TL7705ACP --: Widely available supply-voltage supervisor with reset output, suitable replacement for reset/supervisory functions in DIP-8 form factor.
  • MC33064P-5 --: Undervoltage sensing circuit providing reset signal, commonly used as a lower-cost supervisory alternative in through-hole packages.

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