Overview
The MAX809RTR, produced by onsemi, is a cost-effective system supervisor circuit designed to monitor the supply voltage (VCC) in digital systems and provide a reset signal to the host processor when necessary. This device is part of the MAX809 series and is optimized for low power consumption and high reliability. It requires no external components and is suitable for a wide range of applications, including battery-powered devices and critical microprocessor power supply monitoring.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VCC to GND) | VCC | -0.3 | - | 6.0 | V |
| Reset Threshold Voltage | VTH | Varies by model (e.g., 2.28V to 4.97V) | - | - | V |
| Supply Current (VCC = 3.3V) | 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 - 0.2V, ISINK = 1.2mA) | VOL | - | 0.3 | - | V |
| Operating Junction Temperature Range | TJ | -40 | - | 105 | °C |
| Package Type | - | - | SOT-23, SC-70 | - | - |
Key Features
- Precision VCC monitoring for various supply voltages (1.5V, 1.8V, 2.5V, 3.0V, 3.3V, and 5.0V)
- Precision monitoring voltages available in 100mV steps from 1.2V to 4.9V
- Four guaranteed minimum reset output duration options (1ms, 20ms, 100ms, and 140ms)
- Low supply current of 0.5μA (VCC = 3.3V), making it suitable for battery-powered applications
- VCC transient immunity to reject fast transient glitches
- No external components required
- Wide operating temperature range: -40°C to 105°C
- Compatible with hot plug applications
Applications
- Computers and embedded systems
- Battery-powered equipment
- Critical microprocessor power supply monitoring
- Automotive applications (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 MAX809RTR? The MAX809RTR is designed to monitor the supply voltage (VCC) in digital systems and provide a reset signal to the host processor when necessary.
- What are the available package types for the MAX809RTR? The MAX809RTR is available in SOT-23 and SC-70 packages.
- What is the typical supply current of the MAX809RTR at VCC = 3.3V? The typical supply current is 0.5μA.
- How does the MAX809RTR handle transient glitches on the VCC line? The MAX809RTR is optimized to reject fast transient glitches on the VCC line.
- What are the reset output types for the MAX809 and MAX810 series? The MAX809 has an active-low RESET output, while the MAX810 has an active-high RESET output.
- What is the operating junction temperature range for the MAX809RTR? The operating junction temperature range is -40°C to 105°C.
- Does the MAX809RTR require any external components? No, the MAX809RTR does not require any external components.
- What are some common applications for the MAX809RTR? Common applications include computers, embedded systems, battery-powered equipment, and automotive systems.
- How long does the reset output remain active after VCC rises above the reset threshold? The reset output remains active for a minimum of 140ms after VCC rises above the reset threshold.
- What is the maximum transient duration that the MAX809RTR can reject without generating a reset signal? Transients that go 100mV below the reset threshold and last 5.0μs or less will not cause a reset pulse.
