Overview
The MAX809SQ308T1G, produced by onsemi, is a part of the MAX809 series of very low supply current 3-pin microprocessor reset monitors. These devices are designed to monitor the VCC in digital systems and provide a reset signal to the host processor when necessary. The MAX809SQ308T1G is optimized for precision VCC monitoring and is suitable for a variety of applications, including computers, embedded systems, and battery-powered equipment.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage (VCC to GND) | VCC | −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) | ICC | 0.5 | μA | ||
| Detector Voltage Threshold | VTH | 2.93 | V | ||
| Reset Active Timeout Period | tRP | 1.0 | 140 | ms | |
| Operating Temperature | TA | −40 | 105 | °C |
Key Features
- Precision VCC monitoring for 1.5 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V supplies, with options available in 100 mV steps from 1.2 V to 4.9 V.
- 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.
- 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 MAX809SQ308T1G?
The MAX809SQ308T1G is designed 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 MAX809SQ308T1G?
The reset timeout periods available are 1 ms, 20 ms, 100 ms, and 140 ms.
- What is the typical supply current of the MAX809SQ308T1G at VCC = 3.3 V?
The typical supply current is 0.5 μA.
- Is the MAX809SQ308T1G compatible with hot plug applications?
- What is the operating temperature range of the MAX809SQ308T1G?
The operating temperature range is −40°C to 105°C.
- Does the MAX809SQ308T1G require any external components?
No, it does not require any external components.
- How does the MAX809SQ308T1G handle VCC transients?
The device has VCC transient immunity to reject fast transient glitches on the power supply line.
- Is the MAX809SQ308T1G Pb-free and RoHS compliant?
- What are some typical applications of the MAX809SQ308T1G?
Typical applications include computers, embedded systems, battery-powered equipment, and critical microprocessor power supply monitoring.
- 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.
