Microprocessor Supervisory Circuit The MAX791EPE 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-Pin PDIP (Plastic Dual In-Line Package)
- **Operating Voltage Range:** 1.2V to 5.5V
- **Watchdog Timer:** Programmable timeout period (150ms, 600ms, or 1.2s)
- **Reset Threshold Accuracy:** ±1.5% (for 5V operation)
- **Reset Timeout Period:** Adjustable (200ms min. with external capacitor)
- **Manual Reset Input:** Active-low (MR) with debounce
- **Battery Backup Switchover:** Automatic or manual control
- **Backup Battery Voltage Range:** 1V to 5.5V
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The MAX791EPE is designed to monitor power supply voltages in microprocessor-based systems, ensuring reliable operation. It provides reset signals during power-up, power-down, and brownout conditions. The device includes a watchdog timer, battery backup switchover, and manual reset functionality.
### **Features:**
- **Power-Fail Comparator:** Detects impending power failure.
- **Battery Backup Control:** Automatically switches to backup power when VCC falls below a threshold.
- **Low Quiescent Current:** 40μA (typical) in battery backup mode.
- **Watchdog Timer:** Monitors μP activity; resets system if timer expires.
- **Adjustable Reset Timeout:** Configurable via an external capacitor.
- **Manual Reset Input:** Allows user-initiated system reset.
- **High Noise Immunity:** Glitch rejection on reset and watchdog inputs.
The MAX791EPE is commonly used in embedded systems, industrial controls, and battery-backed applications requiring reliable power monitoring and system reset functions.
(Note: Always refer to the official datasheet for detailed technical information.)
