Overview
The MAX809SN232T1G, 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. They are particularly suited for battery-powered applications due to their low supply current of 0.5 μA at VCC = 3.2 V. The MAX809 series is available in SOT-23 and SC-70 packages, making them compact and efficient for various system designs.
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) | - | 0.5 | - | μA |
| Operating Temperature | -40 | - | 105 | °C |
| Reset Active Timeout Period | 1 | - | 140 | ms |
| VCC to Reset Delay | - | 10 | - | μs |
Key Features
- Precision VCC Monitor for 1.5 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies
- Precision Monitoring Voltages from 1.2 V to 4.9 V Available in 100 mV Steps
- Four Guaranteed Minimum Power-On Reset Pulse Width Available (1 ms, 20 ms, 100 ms, and 140 ms)
- RESET Output Guaranteed to VCC = 1.0 V
- Low Supply Current
- Compatible with Hot Plug Applications
- VCC Transient Immunity
- No External Components Required
- Wide Operating Temperature: -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 MAX809SN232T1G?
The MAX809SN232T1G is a microprocessor reset monitor 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 MAX809SN232T1G at VCC = 3.3 V?
The typical supply current is 0.5 μA at VCC = 3.3 V.
- What are the available reset timeout periods for the MAX809SN232T1G?
The available reset timeout periods are 1 ms, 20 ms, 100 ms, and 140 ms.
- Is the MAX809SN232T1G compatible with hot plug applications?
- What is the operating temperature range of the MAX809SN232T1G?
The operating temperature range is -40°C to 105°C.
- Does the MAX809SN232T1G require any external components?
No, the MAX809SN232T1G does not require any external components.
- How does the MAX809SN232T1G handle VCC transients?
The MAX809SN232T1G has built-in VCC transient immunity and can reject fast transient glitches on the VCC line.
- Is the MAX809SN232T1G Pb-Free and RoHS compliant?
- What are the typical applications of the MAX809SN232T1G?
The 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.
