Microprocessor Supervisory Circuits The **MAX691ACSE** 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
- **Category:** Supervisory Circuits
- **Package:** 16-SOIC (150 mils)
- **Operating Temperature Range:** 0°C to +70°C
- **Supply Voltage (VCC):** 1.2V to 5.5V
- **Reset Threshold Voltage Options:** Adjustable or fixed (factory-set)
- **Reset Timeout Period:** 200ms (typical)
- **Watchdog Timer:** 1.6s (typical)
- **Battery Backup Switchover:** Automatic
- **Battery Backup Current:** 1μA (typical)
- **Manual Reset Input:** Yes
- **Output Type:** Active-low reset
### **Descriptions:**
The **MAX691ACSE** is a comprehensive μP supervisory circuit designed to monitor power supply voltages, provide reset signals, and ensure proper system operation. It includes a watchdog timer, battery backup switching, and manual reset functionality. It is commonly used in embedded systems, industrial controls, and battery-powered applications.
### **Features:**
1. **Power Supply Monitoring:** Monitors VCC and generates a reset signal if voltage drops below a threshold.
2. **Watchdog Timer:** Detects system lockups and triggers a reset if not toggled within a set time.
3. **Battery Backup Switching:** Automatically switches to backup battery power during main power failure.
4. **Low-Power Operation:** Minimal current draw in backup mode (1μA typical).
5. **Adjustable Reset Threshold:** Allows customization for different voltage levels.
6. **Manual Reset Input:** Supports external push-button reset.
7. **Wide Supply Voltage Range:** Operates from 1.2V to 5.5V.
8. **Industrial-Grade Reliability:** Suitable for harsh environments.
This information is based on Maxim Integrated's datasheet and product documentation. For detailed electrical characteristics, refer to the official datasheet.
