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MAX690SCSA from MAXIM,MAXIM - Dallas Semiconductor

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MAX690SCSA

Manufacturer: MAXIM

3.0V or 3.3V microprocessor supervisory circuit. Reset threshold 2.925V. Active-low reset. Watchdog input. Backup-battery switch. Power-fail threshold accuracy +-4%. Power-fail comparator. Reset window +-75mV

Partnumber Manufacturer Quantity Availability
MAX690SCSA MAXIM 100 In Stock

Description and Introduction

3.0V or 3.3V microprocessor supervisory circuit. Reset threshold 2.925V. Active-low reset. Watchdog input. Backup-battery switch. Power-fail threshold accuracy +-4%. Power-fail comparator. Reset window +-75mV The MAX690SCSA is a microprocessor (µP) supervisory circuit manufactured by Maxim Integrated. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX690SCSA  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Supply Voltage Range:** 1.2V to 5.5V  
- **Operating Temperature Range:** 0°C to +70°C  
- **Reset Threshold Accuracy:** ±1.5% (for 5V supply)  
- **Reset Timeout Period:** 200ms (typical)  
- **Quiescent Current:** 35µA (typical)  
- **Watchdog Timer:** Yes (1.6s timeout)  
- **Manual Reset Input:** Yes  
- **Battery Backup Switch:** Yes  

### **Descriptions:**
The MAX690SCSA is designed to monitor power supply voltages in µP and digital systems. It ensures proper system operation by generating a reset signal if the supply voltage drops below a preset threshold. It includes a watchdog timer to detect software crashes and a manual reset input for user-initiated resets.  

### **Features:**
- **Power Supply Monitoring:** Monitors VCC for undervoltage conditions.  
- **Reset Output:** Active-low RESET signal during power-up, power-down, or brownout conditions.  
- **Watchdog Timer:** Resets the µP if not toggled within a set time.  
- **Manual Reset Input:** Allows external pushbutton reset.  
- **Battery Backup Switching:** Automatically switches to backup battery during power failure.  
- **Low Power Consumption:** 35µA typical quiescent current.  
- **Wide Operating Voltage Range:** Supports 1.2V to 5.5V systems.  

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

Application Scenarios & Design Considerations

3.0V or 3.3V microprocessor supervisory circuit. Reset threshold 2.925V. Active-low reset. Watchdog input. Backup-battery switch. Power-fail threshold accuracy +-4%. Power-fail comparator. Reset window +-75mV

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