Microprocessor Supervisory Circuits The MAX690EPA is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Part Number:** MAX690EPA
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)
- **Operating Voltage Range:** 1.2V to 5.5V
- **Reset Threshold Voltage Options:** Factory-Set (e.g., 4.65V for 5V systems)
- **Reset Timeout Period:** Adjustable or Fixed (typically 200ms)
- **Watchdog Timer:** Yes (1.6s typical timeout)
- **Manual Reset Input:** Yes (active-low)
- **Power-Fail Comparator:** Yes (for early warning of power failure)
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The MAX690EPA is a μP supervisory circuit designed to monitor power supply voltages in microprocessor-based systems. It ensures proper system operation by generating a reset signal if the supply voltage drops below a preset threshold. It includes a watchdog timer to detect software lockups and a power-fail comparator for early warning of power loss.
### **Features:**
- **Voltage Monitoring:** Monitors VCC and asserts reset if voltage falls below threshold.
- **Watchdog Timer:** Resets the system if the watchdog input is not toggled within a set time.
- **Manual Reset Input:** Allows for external push-button reset control.
- **Power-Fail Comparator:** Provides early warning of impending power loss.
- **Low Quiescent Current:** Typically 50μA, reducing power consumption.
- **Wide Operating Voltage Range:** Supports systems from 1.2V to 5.5V.
- **Industrial Temperature Range:** Operates reliably from -40°C to +85°C.
This information is strictly based on the manufacturer's datasheet and technical documentation.
