Low-Cost / uP Supervisory Circuits The MAX813LEPA is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated. Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Part Number:** MAX813LEPA
- **Type:** Microprocessor Supervisory Circuit
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)
- **Operating Voltage Range:** 1.2V to 5.5V
- **Reset Threshold Options:** Adjustable or Fixed (1.6V, 2.63V, 3.08V, 4.38V, etc.)
- **Reset Timeout Period:** 140ms (min), 280ms (typ)
- **Watchdog Timer Timeout:** 1.6s (adjustable via external capacitor)
- **Manual Reset Input:** Active-low (MR)
- **Power-Fail Comparator:** No
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The MAX813LEPA is a supervisory circuit designed to monitor power supply voltages in microprocessor-based systems. It ensures proper system operation by generating a reset signal when the supply voltage falls below a specified threshold. It includes a watchdog timer to detect software lockups and a manual reset input for user-initiated resets.
### **Features:**
- **Precision Voltage Monitoring:** Ensures reliable reset generation when VCC falls below the threshold.
- **Watchdog Timer:** Detects system lockups and resets the μP if not toggled within the timeout period.
- **Manual Reset Input:** Allows for external push-button reset control.
- **Low Power Consumption:** Typically draws 50μA (max) in operating mode.
- **Guaranteed Reset Valid Down to VCC = 1V:** Ensures proper reset assertion even at very low voltages.
- **No External Components Required for Fixed Threshold Versions:** Simplifies design.
This information is based on the manufacturer's datasheet and technical documentation.
