Microprocessor Supervisory Circuits The **MAX691EPE+** is a microprocessor (μP) supervisory circuit manufactured by **Maxim Integrated**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Type:** Microprocessor Supervisory Circuit
- **Package:** 16-PDIP (Plastic DIP)
- **Operating Voltage Range:** 1.2V to 5.5V
- **Reset Threshold Voltage:** Adjustable or Fixed (depending on variant)
- **Reset Timeout Period:** 200ms (typical)
- **Watchdog Timer:** Yes (1.6s typical timeout)
- **Manual Reset Input:** Yes
- **Battery Backup Switching:** Yes
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The MAX691EPE+ 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, manual reset input, and battery backup switchover for CMOS RAM or other critical circuitry.
### **Features:**
1. **Voltage Monitoring:** Monitors VCC and generates a reset signal when voltage falls below a preset threshold.
2. **Watchdog Timer:** Detects software crashes by requiring periodic toggling; triggers reset if inactive.
3. **Battery Backup:** Automatically switches to backup battery when main power fails.
4. **Manual Reset Input:** Allows for external reset initiation.
5. **Low Power Consumption:** Suitable for battery-operated systems.
6. **Wide Operating Voltage Range:** Supports 1.2V to 5.5V systems.
7. **Industrial Temperature Range:** Operates reliably in harsh environments (-40°C to +85°C).
This device is commonly used in embedded systems, industrial controls, and other applications requiring reliable power monitoring and system reset functionality.
