Overview
The MAX809SQ120T1G, 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 the MAX809 and MAX810 models. The MAX809SQ120T1G is optimized for precision VCC monitoring and is suitable for a wide range of applications, including computers, embedded systems, and battery-powered equipment.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Power Supply Voltage (VCC to GND) | -0.3 | - | 6.0 | V |
| RESET Output Voltage (CMOS) | -0.3 | - | VCC + 0.3 | V |
| Input Current, VCC | - | - | 20 | mA |
| Output Current, RESET | - | - | 20 | mA |
| Supply Current (VCC = 3.3 V, TA = 25°C) | - | 1.18 | 1.26 | μA |
| Detector Voltage Threshold (VTH) | 1.2 | - | 4.9 | V |
| Reset Active Timeout Period | 1 | - | 140 | ms |
| Operating Temperature | -40 | - | 105 | °C |
Key Features
- Precision VCC monitoring for supplies from 1.5 V to 5.0 V, with options available in 100 mV steps.
- Low supply current of 0.5 μA (VCC = 3.2 V), making it suitable for battery-powered applications.
- No external components required.
- RESET output guaranteed to VCC = 1.0 V.
- Compatible with hot plug applications.
- VCC transient immunity to reject fast transient glitches on the VCC line.
- Wide operating temperature range: -40°C to 105°C.
- Pb-free and RoHS compliant.
Applications
- Computers
- Embedded systems
- Battery-powered equipment
- Critical microprocessor power supply monitoring
Q & A
- What is the primary function of the MAX809SQ120T1G?
The primary function of the MAX809SQ120T1G is to monitor the VCC in digital systems and provide a reset signal to the host processor when necessary.
- What are the available reset timeout periods for the MAX809 series?
The available reset timeout periods are 1 ms, 20 ms, 100 ms, and 140 ms.
- What is the typical supply current of the MAX809SQ120T1G at 3.3 V and 25°C?
The typical supply current is 1.18 μA.
- Is the MAX809SQ120T1G compatible with hot plug applications?
- How does the MAX809SQ120T1G handle VCC transients?
The device has VCC transient immunity to reject fast transient glitches on the VCC line.
- What is the operating temperature range of the MAX809SQ120T1G?
The operating temperature range is -40°C to 105°C.
- Is the MAX809SQ120T1G Pb-free and RoHS compliant?
- What are some typical applications for the MAX809SQ120T1G?
Typical applications include computers, embedded systems, battery-powered equipment, and critical microprocessor power supply monitoring.
- Does the MAX809SQ120T1G require any external components?
No, the MAX809SQ120T1G does not require any external components.
- How does the RESET output behave during power-down?
The RESET output is valid to VCC = 1.0 V. Below this voltage, the output becomes an “open circuit” and does not sink current.
