Overview
The MAX809MTR, produced by onsemi, is a cost-effective system supervisor circuit designed to monitor the VCC in digital systems and provide a reset signal to the host processor when necessary. This device is part of the MAX809 series, which includes various threshold voltage options and is optimized for low supply current, making it suitable for battery-powered applications. The MAX809MTR features an active-low RESET output and is available in a SOT-23 package.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VCC to GND) | VCC | -0.3 | - | 6.0 | V |
| Reset Threshold Voltage (VTH) | VTH | 4.38 | - | - | V |
| Supply Current (VCC = 3.3 V) | ICC | - | 0.5 | 1.2 | µA |
| VCC to Reset Delay | - | - | 10 | - | µsec |
| Reset Active Timeout Period | tRP | 140 | - | 460 | msec |
| RESET Output Voltage Low (VCC = VTH - 0.2 V, ISINK = 1.2 mA) | VOL | - | 0.3 | - | V |
| Operating Junction Temperature Range | TJ | -40 | - | 105 | °C |
Key Features
- No external components required.
- Low supply current of 0.5 µA (VCC = 3.3 V), making it suitable for battery-powered applications.
- Active-low RESET output for the MAX809MTR.
- Available in SOT-23 and SC-70 packages.
- Precision VCC monitoring for various supply voltages (e.g., 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5.0 V).
- Four guaranteed minimum RESET output duration options (1 ms, 20 ms, 100 ms, 140 ms).
- VCC transient immunity to reject fast transient glitches on the power supply line.
- Wide operating temperature range: -40°C to 105°C.
Applications
- Computers and embedded systems.
- Battery-powered equipment.
- Critical microprocessor power supply monitoring.
- Automotive electronics (body electronics, braking, infotainment, instrument cluster, navigation, occupant comfort, occupant protection, powertrain).
- Precision VCC monitoring in various digital systems.
Q & A
- What is the primary function of the MAX809MTR?
The MAX809MTR is a system supervisor circuit designed to monitor the VCC in digital systems and provide a reset signal to the host processor when necessary.
- What is the typical supply current of the MAX809MTR at VCC = 3.3 V?
The typical supply current is 0.5 µA.
- What is the reset threshold voltage for the MAX809MTR?
The reset threshold voltage for the MAX809MTR is 4.38 V.
- How long does the reset output remain active after VCC rises above the reset threshold?
The reset output remains active for a minimum of 140 ms to a maximum of 460 ms after VCC rises above the reset threshold.
- What is the operating temperature range of the MAX809MTR?
The operating temperature range is -40°C to 105°C).
- Does the MAX809MTR require any external components?
No, the MAX809MTR does not require any external components).
- What types of packages are available for the MAX809MTR?
The MAX809MTR is available in SOT-23 and SC-70 packages).
- How does the MAX809MTR handle transient glitches on the power supply line?
The MAX809MTR is optimized to reject fast transient glitches on the power supply line, ensuring accurate VCC monitoring during power-up, power-down, and brownout/sag conditions).
- What are some common applications for the MAX809MTR?
Common applications include computers, embedded systems, battery-powered equipment, and various automotive electronics).
- Is the MAX809MTR suitable for automotive use?
Yes, the MAX809MTR, and specifically the NCV version, is suitable for automotive applications).
