Microprocessor Supervisory Circuits The **MAX691AEWE+T** is a microprocessor (μP) supervisory circuit manufactured by **MAXIM** (now part of Analog Devices). Below are its key specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Manufacturer:** MAXIM (Analog Devices)
- **Package:** 16-SOIC (0.295", 7.50mm Width)
- **Operating Temperature Range:** -40°C to +85°C
- **Supply Voltage (VCC):** 1.2V to 5.5V
- **Reset Threshold Voltage:** Adjustable or fixed (depending on variant)
- **Reset Timeout Period:** Typically 200ms (adjustable in some models)
- **Watchdog Timer:** Yes (programmable timeout)
- **Manual Reset Input:** Yes
- **Battery Backup Switching:** Supports battery backup for CMOS RAM
- **Low Quiescent Current:** Typically 5μA (in battery backup mode)
### **Descriptions:**
The **MAX691AEWE+T** is a comprehensive μP supervisory circuit designed to monitor power supply voltages, provide reset signals, and manage battery backup switching for CMOS RAM. It ensures reliable system operation by generating a reset signal when the supply voltage drops below a specified threshold. The device also includes a watchdog timer and manual reset functionality.
### **Features:**
1. **Voltage Monitoring:** Monitors VCC and generates a reset signal if voltage falls below the threshold.
2. **Battery Backup Switch:** Automatically switches to backup battery power when VCC fails.
3. **Watchdog Timer:** Prevents system lockup by requiring periodic toggling from the µP.
4. **Manual Reset Input:** Allows for an external push-button reset.
5. **Low Power Consumption:** Minimal current draw in battery backup mode.
6. **Wide Operating Voltage Range:** Supports systems from 1.2V to 5.5V.
7. **Adjustable Reset Threshold:** Some variants allow customization of reset voltage levels.
This information is strictly based on the manufacturer's datasheet and technical documentation.
