Overview
The MAX809SEUR+TGA8 is a microprocessor supervisory circuit produced by Analog Devices Inc./Maxim Integrated. This component is designed to monitor power supplies in microprocessor and digital systems, ensuring reliable operation by providing a reset signal when the supply voltage drops below a preset threshold. The MAX809 is part of a family of 3-pin microprocessor reset circuits that include the MAX803 and MAX810, each with different output configurations.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Type | SC70 or SOT23 | - |
| Number of Pins | 3 | - |
| Supply Voltage | +2.5V, +3V, +3.3V, +5V | - |
| Reset Threshold | Varying thresholds for different supply voltages | e.g., 2.93V for MAX809SEUR-T |
| Reset Output Type | Push-Pull Active-Low RESET Output | - |
| Power-On Reset Pulse Width | 140ms (min) | - |
| Supply Current | 12µA | - |
| Reset Valid to VCC | +1V | - |
| Power Supply Transient Immunity | Yes | - |
| AEC-Q100 Qualified | Yes | - |
Key Features
- Precision Monitoring: Monitors +2.5V, +3V, +3.3V, and +5V power-supply voltages with precise reset thresholds.
- Output Configurations: Available in three output configurations: open-drain active-low (MAX803), push-pull active-low (MAX809), and push-pull active-high (MAX810).
- Low Supply Current: Only 12µA supply current, making it ideal for portable equipment.
- Power-On Reset Pulse Width: Ensures a minimum 140ms power-on reset pulse width.
- Guaranteed Reset Validity: Reset signal is guaranteed valid down to VCC = +1V.
- Power Supply Transient Immunity: Designed to ignore fast transients on VCC.
- No External Components: No external components or adjustments are required.
- Compact Packaging: Available in 3-pin SC70 and SOT23 packages.
- AEC-Q100 Qualified: Suitable for automotive applications.
Applications
- Automotive: Used in various automotive systems for reliable power monitoring.
- Computers and Servers: Suitable for desktop, workstation, and server applications.
- Controllers and Intelligent Instruments: Ideal for critical microprocessor and microcontroller power monitoring.
- Portable Battery-Powered Equipment: Low power consumption makes it suitable for battery-powered devices.
Q & A
- What is the primary function of the MAX809SEUR+TGA8?
The primary function is to monitor the power supply voltage and assert a reset signal when the voltage drops below a preset threshold.
- What are the available output configurations for the MAX809 family?
The MAX809 family includes open-drain active-low (MAX803), push-pull active-low (MAX809), and push-pull active-high (MAX810) output configurations.
- What is the minimum power-on reset pulse width for the MAX809?
The minimum power-on reset pulse width is 140ms.
- How much supply current does the MAX809 consume?
The supply current is 12µA.
- Is the MAX809 immune to power supply transients?
Yes, the MAX809 is designed to ignore fast transients on VCC.
- What packages are available for the MAX809?
The MAX809 is available in 3-pin SC70 and SOT23 packages.
- Is the MAX809 AEC-Q100 qualified?
Yes, the MAX809 is AEC-Q100 qualified, making it suitable for automotive applications.
- What is the reset threshold voltage for the MAX809SEUR-T?
The reset threshold voltage for the MAX809SEUR-T is approximately 2.93V.
- Does the MAX809 require external components for operation?
No, the MAX809 does not require any external components or adjustments.
- Down to what voltage is the reset signal guaranteed valid?
The reset signal is guaranteed valid down to VCC = +1V.
