3-pin microprocessor resets The MAX809MW is a microprocessor reset circuit manufactured by Philips (now NXP Semiconductors). Below are its specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Type:** Voltage Monitor / Reset IC
- **Reset Threshold Voltage Options:** Available in various fixed thresholds (e.g., 2.63V, 3.08V, 4.38V, etc., depending on variant)
- **Operating Voltage Range:** Typically 1.1V to 5.5V
- **Output Type:** Active-low reset signal (open-drain or push-pull, depending on variant)
- **Reset Timeout Period:** Typically 140ms (fixed delay after voltage stabilizes)
- **Package:** SOT-143 (for MAX809MW)
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
- The MAX809MW is a precision voltage monitor designed to reset microprocessors during power-up, power-down, or brownout conditions.
- It ensures reliable system operation by holding the microprocessor in reset until the supply voltage stabilizes.
- The device features a manual reset input (if applicable) for external system reset control.
### **Features:**
- **Low Power Consumption:** Typically draws 5µA (ideal for battery-powered systems).
- **No External Components Required:** Internal circuitry eliminates the need for additional resistors or capacitors.
- **Guaranteed Reset Valid Down to VCC = 1V:** Ensures proper reset even at very low voltages.
- **Hysteresis:** Built-in hysteresis prevents erratic reset triggering due to noise.
- **Small Form Factor:** SOT-143 package saves board space.
For exact threshold voltage and variant-specific details, refer to the datasheet.
