Manufacturer: Analog Devices
Key Specifications
- Package: SOT-23-3
- Reset Threshold: 4.38V (typ)
- Reset Output: Active-low, push-pull
- Timeout Period: 140ms (min)
- Supply Voltage: 1.2V to 5.5V
- Operating Temperature: -40°C to +125°C
- Power Consumption: To be verified
- Interface: To be verified
The MAX809MEUR+T from Analog Devices is a compact microprocessor (μP) supervisory circuit designed to monitor power supplies in digital systems. It provides a reset signal to the host processor whenever the supply voltage drops below a preset threshold, ensuring reliable operation during power-up, power-down, and brown-out conditions.
Key Features
- Precision voltage monitoring with a typical threshold of 4.38V
- Active-low, push-pull reset output – no external pull-up resistor required
- 140ms minimum reset timeout period ensures proper system initialization
- Wide supply voltage range from 1.2V to 5.5V
- Low power consumption suitable for battery-powered applications (exact value to be verified)
- Compact SOT-23-3 package for space-constrained designs
- Operating temperature range of -40°C to +125°C
Applications
- Microprocessor and microcontroller systems
- Embedded control systems
- Portable and battery-powered devices
- Computers and peripherals
- Industrial equipment
Selection Guidance
When selecting a supervisory circuit, consider the required reset threshold voltage, output type, and timeout period. The MAX809MEUR+T is suitable for systems operating with a nominal supply near 5V, where a 4.38V threshold provides a safe margin. For lower voltage rails, other versions of the MAX809 family with different thresholds are available. Always verify the exact electrical characteristics in the datasheet before integration.
