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MAX817LCSA from MAXIM,MAXIM - Dallas Semiconductor

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MAX817LCSA

Manufacturer: MAXIM

+5V microprocessor supervisory circuit. Reset threshold 4.65V, active-low reset, backup-battery switchover, power-fail comparator, watchdog input, battery freshness seal.

Partnumber Manufacturer Quantity Availability
MAX817LCSA MAXIM 39 In Stock

Description and Introduction

+5V microprocessor supervisory circuit. Reset threshold 4.65V, active-low reset, backup-battery switchover, power-fail comparator, watchdog input, battery freshness seal. The MAX817LCSA is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX817LCSA  
- **Package:** 8-Pin SOIC  
- **Type:** Microprocessor (μP) Supervisory Circuit  
- **Operating Voltage Range:** 1.2V to 5.5V  
- **Reset Threshold Options:** Adjustable or Fixed (1.575V, 2.32V, 2.63V, 2.93V, 3.08V, 4.38V)  
- **Reset Timeout Period:** 140ms (min), 280ms (typ)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Quiescent Current:** 9μA (typ)  
- **Watchdog Timer:** Yes, 1.6s (typ) timeout  
- **Manual Reset Input:** Yes  
- **Power-On Reset (POR):** Yes  

### **Descriptions:**
The MAX817LCSA is a low-power microprocessor supervisory circuit designed to monitor system power supply voltages and provide a reset signal to the μP during power-up, power-down, or brownout conditions. It includes a watchdog timer, manual reset input, and an adjustable or fixed-voltage reset threshold for flexibility in system design.

### **Features:**
- **Precision Voltage Monitoring:** Ensures reliable reset operation.  
- **Low Quiescent Current:** 9μA (typ) for power efficiency.  
- **Adjustable or Fixed Reset Thresholds:** Supports multiple voltage levels.  
- **Integrated Watchdog Timer:** Monitors μP activity and triggers reset if stalled.  
- **Manual Reset Input:** Allows external reset control.  
- **Power-On Reset (POR):** Guarantees valid reset signal at power-up.  
- **Wide Operating Voltage Range (1.2V to 5.5V):** Suitable for various applications.  
- **Small 8-Pin SOIC Package:** Space-saving design.  

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

Application Scenarios & Design Considerations

+5V microprocessor supervisory circuit. Reset threshold 4.65V, active-low reset, backup-battery switchover, power-fail comparator, watchdog input, battery freshness seal.

Alternative Part Number

  • ADM706SARZ --: Pin-compatible microprocessor supervisory circuit with reset and watchdog functions, widely available and a common drop-in replacement for MAX817 series.
  • TPS3705-33DR --: Similar voltage supervisor with reset output and watchdog timer in SOIC package, suitable functional substitute with good availability.
  • CAT823STDI-GT3 --: Low-cost microprocessor reset supervisor with comparable reset threshold and watchdog features, usable as an alternative in many designs.
  • MC33064D-5G --: Undervoltage sensing/reset IC in SOIC-8 that can cover basic reset supervision needs where watchdog is not critical.

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