Microprocessor Supervisory Circuits The MAX691CPE+ is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated. Below are its specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Part Number:** MAX691CPE+
- **Package:** 16-PDIP (Plastic Dual In-Line Package)
- **Operating Voltage Range:** 1.2V to 5.5V
- **Reset Threshold Voltage Options:** Adjustable or fixed (factory-set)
- **Reset Timeout Period:** 200ms (typical)
- **Operating Temperature Range:** 0°C to +70°C (Commercial)
- **Battery Backup Switchover:** Supports automatic switchover to backup battery
- **Watchdog Timer:** Includes a watchdog timer with a 1.6s timeout (typical)
- **Manual Reset Input:** Supports external manual reset control
- **Low Quiescent Current:** Typically 5μA in backup mode
### **Descriptions:**
The MAX691CPE+ is 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. It also includes a watchdog timer to detect software lockups and a battery backup switchover feature to maintain power during primary supply failure.
### **Features:**
- **Power Supply Monitoring:** Monitors VCC for undervoltage conditions.
- **Battery Backup:** Automatically switches to backup battery when VCC fails.
- **Watchdog Timer:** Prevents system lockup by requiring periodic toggling.
- **Manual Reset Input:** Allows external reset triggering.
- **Low Power Consumption:** Minimal current draw in backup mode.
- **Wide Operating Voltage Range:** Supports systems from 1.2V to 5.5V.
- **Fixed or Adjustable Reset Threshold:** Configurable for different applications.
This information is based on the manufacturer's datasheet and technical documentation.
