Microprocessor Supervisory Circuits The MAX691AEPE is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated. Below are its specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Part Number:** MAX691AEPE
- **Package:** 16-Pin PDIP (Plastic Dual In-Line Package)
- **Operating Voltage Range:** 1.2V to 5.5V
- **Backup Battery Switchover:** Automatic switch to backup supply when primary power fails
- **Reset Threshold Accuracy:** ±1.5% (for 5V operation)
- **Reset Timeout Period:** Adjustable or fixed (typically 200ms)
- **Watchdog Timer:** Programmable timeout period (1.6s default)
- **Manual Reset Input:** Available for external reset control
- **Low Quiescent Current:** Typically 5µA in battery backup mode
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The MAX691AEPE 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 includes a watchdog timer to detect software failures and a backup battery switchover for uninterrupted operation during power loss.
### **Features:**
- **Voltage Monitoring:** Monitors VCC for undervoltage conditions.
- **Battery Backup Switching:** Seamlessly switches to backup battery when main power fails.
- **Watchdog Timer:** Resets the system if software fails to toggle the watchdog input.
- **Manual Reset Input:** Allows external push-button reset control.
- **Low-Power Operation:** Minimal power consumption in battery backup mode.
- **Wide Operating Voltage Range:** Supports systems from 1.2V to 5.5V.
- **High Reset Threshold Accuracy:** Ensures reliable system reset.
This information is based solely on the manufacturer's datasheet and technical documentation.
