Microprocessor Supervisory Circuits The MAX691ACPE+ is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Part Number:** MAX691ACPE+
- **Type:** Microprocessor Supervisory Circuit
- **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
- **Manual Reset Input:** Yes (Active-Low)
- **Watchdog Timer:** Yes (1.6s Timeout)
- **Battery Backup Switching:** Yes (Supports Battery Backup for CMOS RAM)
- **Power-Fail Comparator:** Yes (For Early Warning of Power Failure)
### **Descriptions:**
The MAX691ACPE+ is designed to monitor power supply voltages in microprocessor-based systems, ensuring reliable operation by generating a reset signal during power-up, power-down, or brownout conditions. It includes a watchdog timer to detect software lockups and a manual reset input for user-initiated resets. The device also provides battery backup switching to maintain power to critical components like CMOS RAM during power loss.
### **Features:**
- **Voltage Monitoring:** Ensures proper μP operation by monitoring VCC.
- **Adjustable Reset Threshold:** Allows customization for different system requirements.
- **Watchdog Timer:** Prevents system lockups by requiring periodic toggling.
- **Battery Backup Support:** Automatically switches to backup battery when main power fails.
- **Power-Fail Comparator:** Provides early warning of impending power failure.
- **Manual Reset Input:** Allows external reset triggering.
- **Low Power Consumption:** Ideal for battery-backed applications.
This device is commonly used in embedded systems, industrial controls, and other applications requiring reliable power monitoring and system reset functionality.
(Note: Always refer to the official datasheet for precise details.)
