Microprocessor Supervisory Circuits The MAX690ACPA+ is a microprocessor (μP) supervisory circuit manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Part Number:** MAX690ACPA+
- **Package:** 8-Pin PDIP
- **Operating Voltage Range:** 1.2V to 5.5V
- **Reset Threshold Voltage Options:** Adjustable or Fixed (4.65V, 4.40V, 3.08V, 2.93V, 2.63V, 2.32V)
- **Reset Timeout Period:** 200ms (min)
- **Operating Temperature Range:** 0°C to +70°C
- **Quiescent Current:** 40μA (typical)
- **Watchdog Timer:** Yes (1.6s timeout)
- **Manual Reset Input:** Yes
- **Battery Backup Switch:** Yes
### **Descriptions:**
The MAX690ACPA+ is a low-power μP supervisory circuit designed to monitor power supply voltages in microprocessor-based systems. It provides reset signals during power-up, power-down, and brownout conditions. The device includes a watchdog timer, manual reset input, and a backup battery switchover feature to ensure system reliability.
### **Features:**
- **Power Supply Monitoring:** Ensures proper μP operation during voltage fluctuations.
- **Adjustable or Fixed Reset Threshold:** Multiple voltage options available.
- **Low Power Consumption:** 40μA typical quiescent current.
- **Watchdog Timer:** Prevents system lockup (1.6s timeout).
- **Manual Reset Input:** Allows external reset triggering.
- **Battery Backup Switchover:** Supports backup power supply switching.
- **200ms Reset Pulse Width:** Ensures stable system reset.
- **Wide Operating Voltage Range (1.2V to 5.5V):** Suitable for various applications.
This information is based solely on manufacturer datasheets and technical documentation.
